Alonissos weather by month

Check out Alonissos weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Alonissos (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
10°C maximum daytime temperature in January in Alonissos10
11°C maximum daytime temperature in February in Alonissos11
13°C maximum daytime temperature in March in Alonissos13
17°C maximum daytime temperature in April in Alonissos17
22°C maximum daytime temperature in May in Alonissos22
26°C maximum daytime temperature in June in Alonissos26
28°C maximum daytime temperature in July in Alonissos28
28°C maximum daytime temperature in August in Alonissos28
25°C maximum daytime temperature in September in Alonissos25
20°C maximum daytime temperature in October in Alonissos20
16°C maximum daytime temperature in November in Alonissos16
13°C maximum daytime temperature in December in Alonissos13
Min temperature (night-time)
4°C minimum night-time temperature in January in Alonissos4
5°C minimum night-time temperature in February in Alonissos5
6°C minimum night-time temperature in March in Alonissos6
9°C minimum night-time temperature in April in Alonissos9
13°C minimum night-time temperature in May in Alonissos13
17°C minimum night-time temperature in June in Alonissos17
19°C minimum night-time temperature in July in Alonissos19
19°C minimum night-time temperature in August in Alonissos19
16°C minimum night-time temperature in September in Alonissos16
13°C minimum night-time temperature in October in Alonissos13
9°C minimum night-time temperature in November in Alonissos9
6°C minimum night-time temperature in December in Alonissos6
Heat & Humidity
No heat & humidity in January in Alonissos0
No heat & humidity in February in Alonissos0
No heat & humidity in March in Alonissos0
No heat & humidity in April in Alonissos0
No heat & humidity in May in Alonissos0
Moderate heat & humidity in June in AlonissosM
Moderate heat & humidity in July in AlonissosM
Moderate heat & humidity in August in AlonissosM
Low heat & humidity in September in AlonissosL
No heat & humidity in October in Alonissos0
No heat & humidity in November in Alonissos0
No heat & humidity in December in Alonissos0
Sea temperature
14°C sea temperature in January in Alonissos14
14°C sea temperature in February in Alonissos14
14°C sea temperature in March in Alonissos14
14°C sea temperature in April in Alonissos14
18°C sea temperature in May in Alonissos18
22°C sea temperature in June in Alonissos22
25°C sea temperature in July in Alonissos25
26°C sea temperature in August in Alonissos26
24°C sea temperature in September in Alonissos24
21°C sea temperature in October in Alonissos21
18°C sea temperature in November in Alonissos18
15°C sea temperature in December in Alonissos15

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & UV index in Alonissos

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
10 hours of daylight per day in January in Alonissos10
11 hours of daylight per day in February in Alonissos11
12 hours of daylight per day in March in Alonissos12
13 hours of daylight per day in April in Alonissos13
14 hours of daylight per day in May in Alonissos14
15 hours of daylight per day in June in Alonissos15
15 hours of daylight per day in July in Alonissos15
14 hours of daylight per day in August in Alonissos14
12 hours of daylight per day in September in Alonissos12
11 hours of daylight per day in October in Alonissos11
10 hours of daylight per day in November in Alonissos10
9 hours of daylight per day in December in Alonissos9
UV Index (Maximum)
UV (maximum) index 2 (Low) in January in Alonissos2
UV (maximum) index 3 (Moderate) in February in Alonissos3
UV (maximum) index 4 (Moderate) in March in Alonissos4
UV (maximum) index 6 (High) in April in Alonissos6
UV (maximum) index 8 (Very High) in May in Alonissos8
UV (maximum) index 9 (Very High) in June in Alonissos9
UV (maximum) index 9 (Very High) in July in Alonissos9
UV (maximum) index 8 (Very High) in August in Alonissos8
UV (maximum) index 6 (High) in September in Alonissos6
UV (maximum) index 4 (Moderate) in October in Alonissos4
UV (maximum) index 2 (Low) in November in Alonissos2
UV (maximum) index 2 (Low) in December in Alonissos2

Rainfall in Alonissos

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
9 days with some rainfall in January in Alonissos9
9 days with some rainfall in February in Alonissos9
8 days with some rainfall in March in Alonissos8
8 days with some rainfall in April in Alonissos8
7 days with some rainfall in May in Alonissos7
4 days with some rainfall in June in Alonissos4
3 days with some rainfall in July in Alonissos3
3 days with some rainfall in August in Alonissos3
3 days with some rainfall in September in Alonissos3
6 days with some rainfall in October in Alonissos6
9 days with some rainfall in November in Alonissos9
10 days with some rainfall in December in Alonissos10
Average monthly rainfall (mm)
115 mm monthly rainfall in January in Alonissos115
88 mm monthly rainfall in February in Alonissos88
63 mm monthly rainfall in March in Alonissos63
38 mm monthly rainfall in April in Alonissos38
36 mm monthly rainfall in May in Alonissos36
24 mm monthly rainfall in June in Alonissos24
22 mm monthly rainfall in July in Alonissos22
29 mm monthly rainfall in August in Alonissos29
46 mm monthly rainfall in September in Alonissos46
76 mm monthly rainfall in October in Alonissos76
69 mm monthly rainfall in November in Alonissos69
119 mm monthly rainfall in December in Alonissos119

More about Alonissos

Alonissos by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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The climate guide for Greece (Alonissos) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Alonissos?

Alonissos has a temperate climate with hot dry summers.

Alonissos weather in January

Expect daytime maximum temperatures of 10°C in Alonissos, Greece in January based on long-term weather averages. There are 4 hours of sunshine per day on average with typically 115 mm of rainfall in the month.

  • 10°C maximum daytime temperature in January in Alonissos10
    10°C max day temperature
  • 4 hours of sunshine per day
  • 9 days with some rainfall in January in Alonissos9
    9 days with some rainfall
  • 4°C minimum night-time temperature in January in Alonissos4
    4°C min night temperature
  • 10 hours of daylight per day in January in Alonissos10
    10 hours of daylight per day
  • No heat & humidity in January in Alonissos0
    No heat & humidity
  • 115 mm monthly rainfall in January in Alonissos115
    115 mm of monthly rainfall
  • UV (maximum) index 2 (Low) in January in Alonissos2
    2 (Low) UV index
  • 14°C sea temperature in January in Alonissos14
    14°C sea temperature

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Alonissos weather in February

Expect daytime maximum temperatures of 11°C in Alonissos, Greece in February based on long-term weather averages. There are 5 hours of sunshine per day on average with typically 88 mm of rainfall in the month.

  • 11°C maximum daytime temperature in February in Alonissos11
    11°C max day temperature
  • 5 hours of sunshine per day
  • 9 days with some rainfall in February in Alonissos9
    9 days with some rainfall
  • 5°C minimum night-time temperature in February in Alonissos5
    5°C min night temperature
  • 11 hours of daylight per day in February in Alonissos11
    11 hours of daylight per day
  • No heat & humidity in February in Alonissos0
    No heat & humidity
  • 88 mm monthly rainfall in February in Alonissos88
    88 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in February in Alonissos3
    3 (Moderate) UV index
  • 14°C sea temperature in February in Alonissos14
    14°C sea temperature

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Alonissos weather in March

Expect daytime maximum temperatures of 13°C in Alonissos, Greece in March based on long-term weather averages. There are 6 hours of sunshine per day on average with typically 63 mm of rainfall in the month.

  • 13°C maximum daytime temperature in March in Alonissos13
    13°C max day temperature
  • 6 hours of sunshine per day
  • 8 days with some rainfall in March in Alonissos8
    8 days with some rainfall
  • 6°C minimum night-time temperature in March in Alonissos6
    6°C min night temperature
  • 12 hours of daylight per day in March in Alonissos12
    12 hours of daylight per day
  • No heat & humidity in March in Alonissos0
    No heat & humidity
  • 63 mm monthly rainfall in March in Alonissos63
    63 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in March in Alonissos4
    4 (Moderate) UV index
  • 14°C sea temperature in March in Alonissos14
    14°C sea temperature

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Alonissos weather in April

Expect daytime maximum temperatures of 17°C in Alonissos, Greece in April based on long-term weather averages. There are 8 hours of sunshine per day on average.

  • 17°C maximum daytime temperature in April in Alonissos17
    17°C max day temperature
  • 8 hours of sunshine per day
  • 8 days with some rainfall in April in Alonissos8
    8 days with some rainfall
  • 9°C minimum night-time temperature in April in Alonissos9
    9°C min night temperature
  • 13 hours of daylight per day in April in Alonissos13
    13 hours of daylight per day
  • No heat & humidity in April in Alonissos0
    No heat & humidity
  • 38 mm monthly rainfall in April in Alonissos38
    38 mm of monthly rainfall
  • UV (maximum) index 6 (High) in April in Alonissos6
    6 (High) UV index
  • 14°C sea temperature in April in Alonissos14
    14°C sea temperature

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Alonissos weather in May

Expect daytime maximum temperatures of 22°C in Alonissos, Greece in May based on long-term weather averages. There are 10 hours of sunshine per day on average.

  • 22°C maximum daytime temperature in May in Alonissos22
    22°C max day temperature
  • 10 hours of sunshine per day
  • 7 days with some rainfall in May in Alonissos7
    7 days with some rainfall
  • 13°C minimum night-time temperature in May in Alonissos13
    13°C min night temperature
  • 14 hours of daylight per day in May in Alonissos14
    14 hours of daylight per day
  • No heat & humidity in May in Alonissos0
    No heat & humidity
  • 36 mm monthly rainfall in May in Alonissos36
    36 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in May in Alonissos8
    8 (Very High) UV index
  • 18°C sea temperature in May in Alonissos18
    18°C sea temperature

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Alonissos weather in June

Expect daytime maximum temperatures of 26°C in Alonissos, Greece in June based on long-term weather averages. There are 12 hours of sunshine per day on average.

  • 26°C maximum daytime temperature in June in Alonissos26
    26°C max day temperature
  • 12 hours of sunshine per day
  • 4 days with some rainfall in June in Alonissos4
    4 days with some rainfall
  • 17°C minimum night-time temperature in June in Alonissos17
    17°C min night temperature
  • 15 hours of daylight per day in June in Alonissos15
    15 hours of daylight per day
  • Moderate heat & humidity in June in AlonissosM
    Moderate heat & humidity
  • 24 mm monthly rainfall in June in Alonissos24
    24 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in June in Alonissos9
    9 (Very High) UV index
  • 22°C sea temperature in June in Alonissos22
    22°C sea temperature

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Alonissos weather in July

Expect daytime maximum temperatures of 28°C in Alonissos, Greece in July based on long-term weather averages. There are 13 hours of sunshine per day on average.

  • 28°C maximum daytime temperature in July in Alonissos28
    28°C max day temperature
  • 13 hours of sunshine per day
  • 3 days with some rainfall in July in Alonissos3
    3 days with some rainfall
  • 19°C minimum night-time temperature in July in Alonissos19
    19°C min night temperature
  • 15 hours of daylight per day in July in Alonissos15
    15 hours of daylight per day
  • Moderate heat & humidity in July in AlonissosM
    Moderate heat & humidity
  • 22 mm monthly rainfall in July in Alonissos22
    22 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in July in Alonissos9
    9 (Very High) UV index
  • 25°C sea temperature in July in Alonissos25
    25°C sea temperature

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Alonissos weather in August

Expect daytime maximum temperatures of 28°C in Alonissos, Greece in August based on long-term weather averages. There are 12 hours of sunshine per day on average.

  • 28°C maximum daytime temperature in August in Alonissos28
    28°C max day temperature
  • 12 hours of sunshine per day
  • 3 days with some rainfall in August in Alonissos3
    3 days with some rainfall
  • 19°C minimum night-time temperature in August in Alonissos19
    19°C min night temperature
  • 14 hours of daylight per day in August in Alonissos14
    14 hours of daylight per day
  • Moderate heat & humidity in August in AlonissosM
    Moderate heat & humidity
  • 29 mm monthly rainfall in August in Alonissos29
    29 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Alonissos8
    8 (Very High) UV index
  • 26°C sea temperature in August in Alonissos26
    26°C sea temperature

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Alonissos weather in September

Expect daytime maximum temperatures of 25°C in Alonissos, Greece in September based on long-term weather averages. There are 10 hours of sunshine per day on average with typically 46 mm of rainfall in the month.

  • 25°C maximum daytime temperature in September in Alonissos25
    25°C max day temperature
  • 10 hours of sunshine per day
  • 3 days with some rainfall in September in Alonissos3
    3 days with some rainfall
  • 16°C minimum night-time temperature in September in Alonissos16
    16°C min night temperature
  • 12 hours of daylight per day in September in Alonissos12
    12 hours of daylight per day
  • Low heat & humidity in September in AlonissosL
    Low heat & humidity
  • 46 mm monthly rainfall in September in Alonissos46
    46 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Alonissos6
    6 (High) UV index
  • 24°C sea temperature in September in Alonissos24
    24°C sea temperature

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Alonissos weather in October

Expect daytime maximum temperatures of 20°C in Alonissos, Greece in October based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 76 mm of rainfall in the month.

  • 20°C maximum daytime temperature in October in Alonissos20
    20°C max day temperature
  • 7 hours of sunshine per day
  • 6 days with some rainfall in October in Alonissos6
    6 days with some rainfall
  • 13°C minimum night-time temperature in October in Alonissos13
    13°C min night temperature
  • 11 hours of daylight per day in October in Alonissos11
    11 hours of daylight per day
  • No heat & humidity in October in Alonissos0
    No heat & humidity
  • 76 mm monthly rainfall in October in Alonissos76
    76 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in October in Alonissos4
    4 (Moderate) UV index
  • 21°C sea temperature in October in Alonissos21
    21°C sea temperature

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Alonissos weather in November

Expect daytime maximum temperatures of 16°C in Alonissos, Greece in November based on long-term weather averages. There are 5 hours of sunshine per day on average with typically 69 mm of rainfall in the month.

  • 16°C maximum daytime temperature in November in Alonissos16
    16°C max day temperature
  • 5 hours of sunshine per day
  • 9 days with some rainfall in November in Alonissos9
    9 days with some rainfall
  • 9°C minimum night-time temperature in November in Alonissos9
    9°C min night temperature
  • 10 hours of daylight per day in November in Alonissos10
    10 hours of daylight per day
  • No heat & humidity in November in Alonissos0
    No heat & humidity
  • 69 mm monthly rainfall in November in Alonissos69
    69 mm of monthly rainfall
  • UV (maximum) index 2 (Low) in November in Alonissos2
    2 (Low) UV index
  • 18°C sea temperature in November in Alonissos18
    18°C sea temperature

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Alonissos weather in December

Expect daytime maximum temperatures of 13°C in Alonissos, Greece in December based on long-term weather averages. There are 4 hours of sunshine per day on average with 10 days with some rainfall and typically 119 mm of rainfall in the month.

  • 13°C maximum daytime temperature in December in Alonissos13
    13°C max day temperature
  • 4 hours of sunshine per day
  • 10 days with some rainfall in December in Alonissos10
    10 days with some rainfall
  • 6°C minimum night-time temperature in December in Alonissos6
    6°C min night temperature
  • 9 hours of daylight per day in December in Alonissos9
    9 hours of daylight per day
  • No heat & humidity in December in Alonissos0
    No heat & humidity
  • 119 mm monthly rainfall in December in Alonissos119
    119 mm of monthly rainfall
  • UV (maximum) index 2 (Low) in December in Alonissos2
    2 (Low) UV index
  • 15°C sea temperature in December in Alonissos15
    15°C sea temperature

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More about Alonissos

Alonissos by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Greece

  • Explore latest special offers & online deals from TUI
  • Free child places & £0 deposits with direct debit available
  • Book summer & winter sun holidays in 2026/2027

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The climate guide for Greece (Alonissos) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Compare Alonissos weather with the UK

The weather chart below compares the average monthly maximum daytime temperature for Alonissos, Greece and the UK (London).

Maximum daytime temperature (°C)

Alonissos, Greece
UK (London)
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

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