Walla Walla weather by month

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

Temperature in Walla Walla (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
41°F maximum daytime temperature in January in Walla Walla41
46°F maximum daytime temperature in February in Walla Walla46
54°F maximum daytime temperature in March in Walla Walla54
61°F maximum daytime temperature in April in Walla Walla61
70°F maximum daytime temperature in May in Walla Walla70
79°F maximum daytime temperature in June in Walla Walla79
88°F maximum daytime temperature in July in Walla Walla88
88°F maximum daytime temperature in August in Walla Walla88
77°F maximum daytime temperature in September in Walla Walla77
64°F maximum daytime temperature in October in Walla Walla64
50°F maximum daytime temperature in November in Walla Walla50
41°F maximum daytime temperature in December in Walla Walla41
Min temperature (night-time)
28°F minimum night-time temperature in January in Walla Walla28
32°F minimum night-time temperature in February in Walla Walla32
36°F minimum night-time temperature in March in Walla Walla36
39°F minimum night-time temperature in April in Walla Walla39
46°F minimum night-time temperature in May in Walla Walla46
54°F minimum night-time temperature in June in Walla Walla54
59°F minimum night-time temperature in July in Walla Walla59
59°F minimum night-time temperature in August in Walla Walla59
50°F minimum night-time temperature in September in Walla Walla50
41°F minimum night-time temperature in October in Walla Walla41
34°F minimum night-time temperature in November in Walla Walla34
28°F minimum night-time temperature in December in Walla Walla28
Heat & Humidity
No heat & humidity in January in Walla Walla0
No heat & humidity in February in Walla Walla0
No heat & humidity in March in Walla Walla0
No heat & humidity in April in Walla Walla0
No heat & humidity in May in Walla Walla0
Low heat & humidity in June in Walla WallaL
Moderate heat & humidity in July in Walla WallaM
Moderate heat & humidity in August in Walla WallaM
No heat & humidity in September in Walla Walla0
No heat & humidity in October in Walla Walla0
No heat & humidity in November in Walla Walla0
No heat & humidity in December in Walla Walla0

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

Sunshine & Daylight in Walla Walla

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
9 hours of daylight per day in January in Walla Walla9
10 hours of daylight per day in February in Walla Walla10
12 hours of daylight per day in March in Walla Walla12
14 hours of daylight per day in April in Walla Walla14
15 hours of daylight per day in May in Walla Walla15
16 hours of daylight per day in June in Walla Walla16
15 hours of daylight per day in July in Walla Walla15
14 hours of daylight per day in August in Walla Walla14
12 hours of daylight per day in September in Walla Walla12
11 hours of daylight per day in October in Walla Walla11
9 hours of daylight per day in November in Walla Walla9
9 hours of daylight per day in December in Walla Walla9
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Walla Walla1
UV (maximum) index 2 (Low) in February in Walla Walla2
UV (maximum) index 3 (Moderate) in March in Walla Walla3
UV (maximum) index 5 (Moderate) in April in Walla Walla5
UV (maximum) index 6 (High) in May in Walla Walla6
UV (maximum) index 8 (Very High) in June in Walla Walla8
UV (maximum) index 8 (Very High) in July in Walla Walla8
UV (maximum) index 7 (High) in August in Walla Walla7
UV (maximum) index 5 (Moderate) in September in Walla Walla5
UV (maximum) index 3 (Moderate) in October in Walla Walla3
UV (maximum) index 1 (Low) in November in Walla Walla1
UV (maximum) index 1 (Low) in December in Walla Walla1

Rainfall in Walla Walla

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
12 days with some rainfall in January in Walla Walla12
10 days with some rainfall in February in Walla Walla10
10 days with some rainfall in March in Walla Walla10
9 days with some rainfall in April in Walla Walla9
8 days with some rainfall in May in Walla Walla8
6 days with some rainfall in June in Walla Walla6
3 days with some rainfall in July in Walla Walla3
4 days with some rainfall in August in Walla Walla4
5 days with some rainfall in September in Walla Walla5
6 days with some rainfall in October in Walla Walla6
11 days with some rainfall in November in Walla Walla11
12 days with some rainfall in December in Walla Walla12
Average monthly rainfall (inches)
2.5 inches monthly rainfall in January in Walla Walla2.5
1.9 inches monthly rainfall in February in Walla Walla1.9
2.1 inches monthly rainfall in March in Walla Walla2.1
1.7 inches monthly rainfall in April in Walla Walla1.7
1.8 inches monthly rainfall in May in Walla Walla1.8
1.2 inches monthly rainfall in June in Walla Walla1.2
0.6 inches monthly rainfall in July in Walla Walla0.6
0.8 inches monthly rainfall in August in Walla Walla0.8
0.9 inches monthly rainfall in September in Walla Walla0.9
1.7 inches monthly rainfall in October in Walla Walla1.7
2.6 inches monthly rainfall in November in Walla Walla2.6
2.6 inches monthly rainfall in December in Walla Walla2.6

More about Walla Walla

Walla Walla by month

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

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The climate guide for Washington State (Walla Walla) 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 Walla Walla?

Walla Walla has a cool semi arid climate with hot summers.

Walla Walla weather in January

Expect daytime maximum temperatures of 41°F in Walla Walla, Washington State in January based on long-term weather averages. There are 2 hours of sunshine per day on average with 12 days with some rainfall and typically 2.5 inches of rainfall in the month.

  • 41°F maximum daytime temperature in January in Walla Walla41
    41°F max day temperature
  • 2 hours of sunshine per day
  • 12 days with some rainfall in January in Walla Walla12
    12 days with some rainfall
  • 28°F minimum night-time temperature in January in Walla Walla28
    28°F min night temperature
  • 9 hours of daylight per day in January in Walla Walla9
    9 hours of daylight per day
  • No heat & humidity in January in Walla Walla0
    No heat & humidity
  • 2.5 inches monthly rainfall in January in Walla Walla2.5
    2.5 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in January in Walla Walla1
    1 (Low) UV index

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Walla Walla weather in February

Expect daytime maximum temperatures of 46°F in Walla Walla, Washington State in February based on long-term weather averages. There are 3 hours of sunshine per day on average with 10 days with some rainfall and typically 1.9 inches of rainfall in the month.

  • 46°F maximum daytime temperature in February in Walla Walla46
    46°F max day temperature
  • 3 hours of sunshine per day
  • 10 days with some rainfall in February in Walla Walla10
    10 days with some rainfall
  • 32°F minimum night-time temperature in February in Walla Walla32
    32°F min night temperature
  • 10 hours of daylight per day in February in Walla Walla10
    10 hours of daylight per day
  • No heat & humidity in February in Walla Walla0
    No heat & humidity
  • 1.9 inches monthly rainfall in February in Walla Walla1.9
    1.9 inches of monthly rainfall
  • UV (maximum) index 2 (Low) in February in Walla Walla2
    2 (Low) UV index

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Walla Walla weather in March

Expect daytime maximum temperatures of 54°F in Walla Walla, Washington State in March based on long-term weather averages. There are 6 hours of sunshine per day on average with 10 days with some rainfall and typically 2.1 inches of rainfall in the month.

  • 54°F maximum daytime temperature in March in Walla Walla54
    54°F max day temperature
  • 6 hours of sunshine per day
  • 10 days with some rainfall in March in Walla Walla10
    10 days with some rainfall
  • 36°F minimum night-time temperature in March in Walla Walla36
    36°F min night temperature
  • 12 hours of daylight per day in March in Walla Walla12
    12 hours of daylight per day
  • No heat & humidity in March in Walla Walla0
    No heat & humidity
  • 2.1 inches monthly rainfall in March in Walla Walla2.1
    2.1 inches of monthly rainfall
  • UV (maximum) index 3 (Moderate) in March in Walla Walla3
    3 (Moderate) UV index

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Walla Walla weather in April

Expect daytime maximum temperatures of 61°F in Walla Walla, Washington State in April based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 1.7 inches of rainfall in the month.

  • 61°F maximum daytime temperature in April in Walla Walla61
    61°F max day temperature
  • 7 hours of sunshine per day
  • 9 days with some rainfall in April in Walla Walla9
    9 days with some rainfall
  • 39°F minimum night-time temperature in April in Walla Walla39
    39°F min night temperature
  • 14 hours of daylight per day in April in Walla Walla14
    14 hours of daylight per day
  • No heat & humidity in April in Walla Walla0
    No heat & humidity
  • 1.7 inches monthly rainfall in April in Walla Walla1.7
    1.7 inches of monthly rainfall
  • UV (maximum) index 5 (Moderate) in April in Walla Walla5
    5 (Moderate) UV index

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Walla Walla weather in May

Expect daytime maximum temperatures of 70°F in Walla Walla, Washington State in May based on long-term weather averages. There are 9 hours of sunshine per day on average with typically 1.8 inches of rainfall in the month.

  • 70°F maximum daytime temperature in May in Walla Walla70
    70°F max day temperature
  • 9 hours of sunshine per day
  • 8 days with some rainfall in May in Walla Walla8
    8 days with some rainfall
  • 46°F minimum night-time temperature in May in Walla Walla46
    46°F min night temperature
  • 15 hours of daylight per day in May in Walla Walla15
    15 hours of daylight per day
  • No heat & humidity in May in Walla Walla0
    No heat & humidity
  • 1.8 inches monthly rainfall in May in Walla Walla1.8
    1.8 inches of monthly rainfall
  • UV (maximum) index 6 (High) in May in Walla Walla6
    6 (High) UV index

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Walla Walla weather in June

Expect daytime maximum temperatures of 79°F in Walla Walla, Washington State in June based on long-term weather averages. There are 11 hours of sunshine per day on average.

  • 79°F maximum daytime temperature in June in Walla Walla79
    79°F max day temperature
  • 11 hours of sunshine per day
  • 6 days with some rainfall in June in Walla Walla6
    6 days with some rainfall
  • 54°F minimum night-time temperature in June in Walla Walla54
    54°F min night temperature
  • 16 hours of daylight per day in June in Walla Walla16
    16 hours of daylight per day
  • Low heat & humidity in June in Walla WallaL
    Low heat & humidity
  • 1.2 inches monthly rainfall in June in Walla Walla1.2
    1.2 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in June in Walla Walla8
    8 (Very High) UV index

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Walla Walla weather in July

Expect daytime maximum temperatures of 88°F in Walla Walla, Washington State in July based on long-term weather averages. There are 13 hours of sunshine per day on average.

  • 88°F maximum daytime temperature in July in Walla Walla88
    88°F max day temperature
  • 13 hours of sunshine per day
  • 3 days with some rainfall in July in Walla Walla3
    3 days with some rainfall
  • 59°F minimum night-time temperature in July in Walla Walla59
    59°F min night temperature
  • 15 hours of daylight per day in July in Walla Walla15
    15 hours of daylight per day
  • Moderate heat & humidity in July in Walla WallaM
    Moderate heat & humidity
  • 0.6 inches monthly rainfall in July in Walla Walla0.6
    0.6 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in July in Walla Walla8
    8 (Very High) UV index

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Walla Walla weather in August

Expect daytime maximum temperatures of 88°F in Walla Walla, Washington State in August based on long-term weather averages. There are 11 hours of sunshine per day on average.

  • 88°F maximum daytime temperature in August in Walla Walla88
    88°F max day temperature
  • 11 hours of sunshine per day
  • 4 days with some rainfall in August in Walla Walla4
    4 days with some rainfall
  • 59°F minimum night-time temperature in August in Walla Walla59
    59°F min night temperature
  • 14 hours of daylight per day in August in Walla Walla14
    14 hours of daylight per day
  • Moderate heat & humidity in August in Walla WallaM
    Moderate heat & humidity
  • 0.8 inches monthly rainfall in August in Walla Walla0.8
    0.8 inches of monthly rainfall
  • UV (maximum) index 7 (High) in August in Walla Walla7
    7 (High) UV index

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Walla Walla weather in September

Expect daytime maximum temperatures of 77°F in Walla Walla, Washington State in September based on long-term weather averages. There are 9 hours of sunshine per day on average.

  • 77°F maximum daytime temperature in September in Walla Walla77
    77°F max day temperature
  • 9 hours of sunshine per day
  • 5 days with some rainfall in September in Walla Walla5
    5 days with some rainfall
  • 50°F minimum night-time temperature in September in Walla Walla50
    50°F min night temperature
  • 12 hours of daylight per day in September in Walla Walla12
    12 hours of daylight per day
  • No heat & humidity in September in Walla Walla0
    No heat & humidity
  • 0.9 inches monthly rainfall in September in Walla Walla0.9
    0.9 inches of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Walla Walla5
    5 (Moderate) UV index

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Walla Walla weather in October

Expect daytime maximum temperatures of 64°F in Walla Walla, Washington State in October based on long-term weather averages. There are 6 hours of sunshine per day on average with typically 1.7 inches of rainfall in the month.

  • 64°F maximum daytime temperature in October in Walla Walla64
    64°F max day temperature
  • 6 hours of sunshine per day
  • 6 days with some rainfall in October in Walla Walla6
    6 days with some rainfall
  • 41°F minimum night-time temperature in October in Walla Walla41
    41°F min night temperature
  • 11 hours of daylight per day in October in Walla Walla11
    11 hours of daylight per day
  • No heat & humidity in October in Walla Walla0
    No heat & humidity
  • 1.7 inches monthly rainfall in October in Walla Walla1.7
    1.7 inches of monthly rainfall
  • UV (maximum) index 3 (Moderate) in October in Walla Walla3
    3 (Moderate) UV index

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Walla Walla weather in November

Expect daytime maximum temperatures of 50°F in Walla Walla, Washington State in November based on long-term weather averages. There are 2 hours of sunshine per day on average with 11 days with some rainfall and typically 2.6 inches of rainfall in the month.

  • 50°F maximum daytime temperature in November in Walla Walla50
    50°F max day temperature
  • 2 hours of sunshine per day
  • 11 days with some rainfall in November in Walla Walla11
    11 days with some rainfall
  • 34°F minimum night-time temperature in November in Walla Walla34
    34°F min night temperature
  • 9 hours of daylight per day in November in Walla Walla9
    9 hours of daylight per day
  • No heat & humidity in November in Walla Walla0
    No heat & humidity
  • 2.6 inches monthly rainfall in November in Walla Walla2.6
    2.6 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in November in Walla Walla1
    1 (Low) UV index

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Walla Walla weather in December

Expect daytime maximum temperatures of 41°F in Walla Walla, Washington State in December based on long-term weather averages. There are 2 hours of sunshine per day on average with 12 days with some rainfall and typically 2.6 inches of rainfall in the month.

  • 41°F maximum daytime temperature in December in Walla Walla41
    41°F max day temperature
  • 2 hours of sunshine per day
  • 12 days with some rainfall in December in Walla Walla12
    12 days with some rainfall
  • 28°F minimum night-time temperature in December in Walla Walla28
    28°F min night temperature
  • 9 hours of daylight per day in December in Walla Walla9
    9 hours of daylight per day
  • No heat & humidity in December in Walla Walla0
    No heat & humidity
  • 2.6 inches monthly rainfall in December in Walla Walla2.6
    2.6 inches of monthly rainfall
  • UV (maximum) index 1 (Low) in December in Walla Walla1
    1 (Low) UV index

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More about Walla Walla

Walla Walla by month

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

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The climate guide for Washington State (Walla Walla) 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.

Metric (°C)  |  Imperial (°F)

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More about the USA

Compare Walla Walla with the UK

Below the Walla Walla chart shows average maximum daytime temperature for Walla Walla, Washington, USA and the UK (London).

Maximum daytime temperature (°F)

Walla Walla, Washington, USA
UK (London)
41
45
46
45
54
50
61
55
70
63
79
68
88
72
88
72
77
66
64
59
50
50
41
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C)  |  Imperial (°F)

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