Portland weather by month

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

Temperature in Portland (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
7°C maximum daytime temperature in January in Portland7
10°C maximum daytime temperature in February in Portland10
12°C maximum daytime temperature in March in Portland12
15°C maximum daytime temperature in April in Portland15
19°C maximum daytime temperature in May in Portland19
22°C maximum daytime temperature in June in Portland22
26°C maximum daytime temperature in July in Portland26
26°C maximum daytime temperature in August in Portland26
23°C maximum daytime temperature in September in Portland23
17°C maximum daytime temperature in October in Portland17
11°C maximum daytime temperature in November in Portland11
7°C maximum daytime temperature in December in Portland7
Min temperature (night-time)
0°C minimum night-time temperature in January in Portland0
1°C minimum night-time temperature in February in Portland1
3°C minimum night-time temperature in March in Portland3
4°C minimum night-time temperature in April in Portland4
7°C minimum night-time temperature in May in Portland7
10°C minimum night-time temperature in June in Portland10
12°C minimum night-time temperature in July in Portland12
12°C minimum night-time temperature in August in Portland12
9°C minimum night-time temperature in September in Portland9
6°C minimum night-time temperature in October in Portland6
3°C minimum night-time temperature in November in Portland3
1°C minimum night-time temperature in December in Portland1
Heat & Humidity
No heat & humidity in January in Portland0
No heat & humidity in February in Portland0
No heat & humidity in March in Portland0
No heat & humidity in April in Portland0
No heat & humidity in May in Portland0
No heat & humidity in June in Portland0
Low heat & humidity in July in PortlandL
Low heat & humidity in August in PortlandL
No heat & humidity in September in Portland0
No heat & humidity in October in Portland0
No heat & humidity in November in Portland0
No heat & humidity in December in Portland0

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

Sunshine & UV index in Portland

  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 Portland9
10 hours of daylight per day in February in Portland10
12 hours of daylight per day in March in Portland12
14 hours of daylight per day in April in Portland14
15 hours of daylight per day in May in Portland15
16 hours of daylight per day in June in Portland16
15 hours of daylight per day in July in Portland15
14 hours of daylight per day in August in Portland14
12 hours of daylight per day in September in Portland12
11 hours of daylight per day in October in Portland11
9 hours of daylight per day in November in Portland9
9 hours of daylight per day in December in Portland9
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Portland1
UV (maximum) index 2 (Low) in February in Portland2
UV (maximum) index 3 (Moderate) in March in Portland3
UV (maximum) index 5 (Moderate) in April in Portland5
UV (maximum) index 6 (High) in May in Portland6
UV (maximum) index 7 (High) in June in Portland7
UV (maximum) index 8 (Very High) in July in Portland8
UV (maximum) index 7 (High) in August in Portland7
UV (maximum) index 5 (Moderate) in September in Portland5
UV (maximum) index 3 (Moderate) in October in Portland3
UV (maximum) index 2 (Low) in November in Portland2
UV (maximum) index 1 (Low) in December in Portland1

Rainfall in Portland

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
17 days with some rainfall in January in Portland17
15 days with some rainfall in February in Portland15
16 days with some rainfall in March in Portland16
14 days with some rainfall in April in Portland14
11 days with some rainfall in May in Portland11
8 days with some rainfall in June in Portland8
4 days with some rainfall in July in Portland4
5 days with some rainfall in August in Portland5
8 days with some rainfall in September in Portland8
11 days with some rainfall in October in Portland11
18 days with some rainfall in November in Portland18
18 days with some rainfall in December in Portland18
Average monthly rainfall (mm)
163 mm monthly rainfall in January in Portland163
118 mm monthly rainfall in February in Portland118
107 mm monthly rainfall in March in Portland107
72 mm monthly rainfall in April in Portland72
57 mm monthly rainfall in May in Portland57
42 mm monthly rainfall in June in Portland42
18 mm monthly rainfall in July in Portland18
28 mm monthly rainfall in August in Portland28
47 mm monthly rainfall in September in Portland47
84 mm monthly rainfall in October in Portland84
156 mm monthly rainfall in November in Portland156
179 mm monthly rainfall in December in Portland179

More about Portland

Portland by month

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

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The climate guide for Oregon (Portland) 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 Portland?

Portland has a temperate climate with warm dry summers.

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

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Compare Portland weather with the UK

The weather chart below compares the average monthly maximum daytime temperature for Portland, Oregon, USA and the UK (London).

Maximum daytime temperature (°C)

Portland, Oregon, USA
UK (London)
7
7
10
7
12
10
15
13
19
17
22
20
26
22
26
22
23
19
17
15
11
10
7
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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

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