Lewiston weather by month

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

Temperature in Lewiston (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
37°F maximum daytime temperature in January in Lewiston37
45°F maximum daytime temperature in February in Lewiston45
52°F maximum daytime temperature in March in Lewiston52
61°F maximum daytime temperature in April in Lewiston61
70°F maximum daytime temperature in May in Lewiston70
79°F maximum daytime temperature in June in Lewiston79
88°F maximum daytime temperature in July in Lewiston88
88°F maximum daytime temperature in August in Lewiston88
77°F maximum daytime temperature in September in Lewiston77
63°F maximum daytime temperature in October in Lewiston63
46°F maximum daytime temperature in November in Lewiston46
39°F maximum daytime temperature in December in Lewiston39
Min temperature (night-time)
27°F minimum night-time temperature in January in Lewiston27
30°F minimum night-time temperature in February in Lewiston30
34°F minimum night-time temperature in March in Lewiston34
37°F minimum night-time temperature in April in Lewiston37
45°F minimum night-time temperature in May in Lewiston45
52°F minimum night-time temperature in June in Lewiston52
55°F minimum night-time temperature in July in Lewiston55
55°F minimum night-time temperature in August in Lewiston55
48°F minimum night-time temperature in September in Lewiston48
39°F minimum night-time temperature in October in Lewiston39
32°F minimum night-time temperature in November in Lewiston32
27°F minimum night-time temperature in December in Lewiston27
Heat & Humidity
No heat & humidity in January in Lewiston0
No heat & humidity in February in Lewiston0
No heat & humidity in March in Lewiston0
No heat & humidity in April in Lewiston0
No heat & humidity in May in Lewiston0
No heat & humidity in June in Lewiston0
Moderate heat & humidity in July in LewistonM
Moderate heat & humidity in August in LewistonM
No heat & humidity in September in Lewiston0
No heat & humidity in October in Lewiston0
No heat & humidity in November in Lewiston0
No heat & humidity in December in Lewiston0

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

Sunshine & Daylight in Lewiston

  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 Lewiston9
10 hours of daylight per day in February in Lewiston10
12 hours of daylight per day in March in Lewiston12
14 hours of daylight per day in April in Lewiston14
15 hours of daylight per day in May in Lewiston15
16 hours of daylight per day in June in Lewiston16
15 hours of daylight per day in July in Lewiston15
14 hours of daylight per day in August in Lewiston14
12 hours of daylight per day in September in Lewiston12
11 hours of daylight per day in October in Lewiston11
9 hours of daylight per day in November in Lewiston9
9 hours of daylight per day in December in Lewiston9
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Lewiston1
UV (maximum) index 2 (Low) in February in Lewiston2
UV (maximum) index 3 (Moderate) in March in Lewiston3
UV (maximum) index 5 (Moderate) in April in Lewiston5
UV (maximum) index 7 (High) in May in Lewiston7
UV (maximum) index 8 (Very High) in June in Lewiston8
UV (maximum) index 8 (Very High) in July in Lewiston8
UV (maximum) index 7 (High) in August in Lewiston7
UV (maximum) index 5 (Moderate) in September in Lewiston5
UV (maximum) index 3 (Moderate) in October in Lewiston3
UV (maximum) index 1 (Low) in November in Lewiston1
UV (maximum) index 1 (Low) in December in Lewiston1

Rainfall in Lewiston

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
11 days with some rainfall in January in Lewiston11
10 days with some rainfall in February in Lewiston10
11 days with some rainfall in March in Lewiston11
10 days with some rainfall in April in Lewiston10
9 days with some rainfall in May in Lewiston9
8 days with some rainfall in June in Lewiston8
5 days with some rainfall in July in Lewiston5
5 days with some rainfall in August in Lewiston5
6 days with some rainfall in September in Lewiston6
7 days with some rainfall in October in Lewiston7
11 days with some rainfall in November in Lewiston11
12 days with some rainfall in December in Lewiston12
Average monthly rainfall (inches)
1.6 inches monthly rainfall in January in Lewiston1.6
1.1 inches monthly rainfall in February in Lewiston1.1
1.3 inches monthly rainfall in March in Lewiston1.3
1.3 inches monthly rainfall in April in Lewiston1.3
1.5 inches monthly rainfall in May in Lewiston1.5
1.4 inches monthly rainfall in June in Lewiston1.4
0.7 inches monthly rainfall in July in Lewiston0.7
0.8 inches monthly rainfall in August in Lewiston0.8
0.8 inches monthly rainfall in September in Lewiston0.8
1.1 inches monthly rainfall in October in Lewiston1.1
1.5 inches monthly rainfall in November in Lewiston1.5
1.6 inches monthly rainfall in December in Lewiston1.6

More about Lewiston

Lewiston by month

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

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The climate guide for Idaho (Lewiston) 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 Lewiston?

Lewiston has a cool semi arid climate with hot summers.

Metric (°C)  |  Imperial (°F)

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More about the USA

Compare Lewiston with the USA

Below the Lewiston chart shows average maximum daytime temperature for Lewiston, Idaho, USA and the USA (Washington).

Maximum daytime temperature (°F)

Lewiston, Idaho, USA
USA (Washington)
37
41
45
45
52
55
61
66
70
75
79
84
88
88
88
86
77
79
63
68
46
57
39
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C)  |  Imperial (°F)

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