Sun Valley weather by month

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

Temperature in Sun Valley (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
28°F maximum daytime temperature in January in Sun Valley28
34°F maximum daytime temperature in February in Sun Valley34
39°F maximum daytime temperature in March in Sun Valley39
50°F maximum daytime temperature in April in Sun Valley50
61°F maximum daytime temperature in May in Sun Valley61
68°F maximum daytime temperature in June in Sun Valley68
79°F maximum daytime temperature in July in Sun Valley79
77°F maximum daytime temperature in August in Sun Valley77
68°F maximum daytime temperature in September in Sun Valley68
55°F maximum daytime temperature in October in Sun Valley55
39°F maximum daytime temperature in November in Sun Valley39
30°F maximum daytime temperature in December in Sun Valley30
Min temperature (night-time)
7°F minimum night-time temperature in January in Sun Valley7
10°F minimum night-time temperature in February in Sun Valley10
16°F minimum night-time temperature in March in Sun Valley16
23°F minimum night-time temperature in April in Sun Valley23
30°F minimum night-time temperature in May in Sun Valley30
37°F minimum night-time temperature in June in Sun Valley37
43°F minimum night-time temperature in July in Sun Valley43
41°F minimum night-time temperature in August in Sun Valley41
34°F minimum night-time temperature in September in Sun Valley34
25°F minimum night-time temperature in October in Sun Valley25
16°F minimum night-time temperature in November in Sun Valley16
9°F minimum night-time temperature in December in Sun Valley9
Heat & Humidity
No heat & humidity in January in Sun Valley0
No heat & humidity in February in Sun Valley0
No heat & humidity in March in Sun Valley0
No heat & humidity in April in Sun Valley0
No heat & humidity in May in Sun Valley0
No heat & humidity in June in Sun Valley0
No heat & humidity in July in Sun Valley0
No heat & humidity in August in Sun Valley0
No heat & humidity in September in Sun Valley0
No heat & humidity in October in Sun Valley0
No heat & humidity in November in Sun Valley0
No heat & humidity in December in Sun Valley0

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

Sunshine & Daylight in Sun Valley

  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 Sun Valley9
11 hours of daylight per day in February in Sun Valley11
12 hours of daylight per day in March in Sun Valley12
13 hours of daylight per day in April in Sun Valley13
15 hours of daylight per day in May in Sun Valley15
15 hours of daylight per day in June in Sun Valley15
15 hours of daylight per day in July in Sun Valley15
14 hours of daylight per day in August in Sun Valley14
12 hours of daylight per day in September in Sun Valley12
11 hours of daylight per day in October in Sun Valley11
10 hours of daylight per day in November in Sun Valley10
9 hours of daylight per day in December in Sun Valley9
UV Index (Maximum)
UV (maximum) index 2 (Low) in January in Sun Valley2
UV (maximum) index 2 (Low) in February in Sun Valley2
UV (maximum) index 4 (Moderate) in March in Sun Valley4
UV (maximum) index 6 (High) in April in Sun Valley6
UV (maximum) index 8 (Very High) in May in Sun Valley8
UV (maximum) index 9 (Very High) in June in Sun Valley9
UV (maximum) index 10 (Very High) in July in Sun Valley10
UV (maximum) index 9 (Very High) in August in Sun Valley9
UV (maximum) index 6 (High) in September in Sun Valley6
UV (maximum) index 4 (Moderate) in October in Sun Valley4
UV (maximum) index 2 (Low) in November in Sun Valley2
UV (maximum) index 1 (Low) in December in Sun Valley1

Rainfall in Sun Valley

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
13 days with some rainfall in January in Sun Valley13
11 days with some rainfall in February in Sun Valley11
13 days with some rainfall in March in Sun Valley13
11 days with some rainfall in April in Sun Valley11
11 days with some rainfall in May in Sun Valley11
9 days with some rainfall in June in Sun Valley9
7 days with some rainfall in July in Sun Valley7
8 days with some rainfall in August in Sun Valley8
8 days with some rainfall in September in Sun Valley8
7 days with some rainfall in October in Sun Valley7
11 days with some rainfall in November in Sun Valley11
13 days with some rainfall in December in Sun Valley13
Average monthly rainfall (inches)
2.6 inches monthly rainfall in January in Sun Valley2.6
2.0 inches monthly rainfall in February in Sun Valley2.0
1.7 inches monthly rainfall in March in Sun Valley1.7
1.3 inches monthly rainfall in April in Sun Valley1.3
1.7 inches monthly rainfall in May in Sun Valley1.7
1.7 inches monthly rainfall in June in Sun Valley1.7
0.8 inches monthly rainfall in July in Sun Valley0.8
1.1 inches monthly rainfall in August in Sun Valley1.1
1.0 inches monthly rainfall in September in Sun Valley1.0
1.1 inches monthly rainfall in October in Sun Valley1.1
1.9 inches monthly rainfall in November in Sun Valley1.9
2.6 inches monthly rainfall in December in Sun Valley2.6

More about Sun Valley

Sun Valley by month

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

Recommended for Idaho

Cosmos: Single supplement waived

  • Book selected 2024 tours to Europe & North America
  • Visit France, Italy, Greece, Spain, Canada & the USA
  • Travel before 31st December 2024 (inclusive)
Go to Cosmos deal >>

Expires at 23:59 on Wednesday 31st Jul 2024 · View all Cosmos offers

The climate guide for Idaho (Sun Valley) 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 Sun Valley?

Sun Valley has a cold climate with warm dry summers.

Metric (°C)  |  Imperial (°F)

Back to top

More about the USA

Compare Sun Valley with the USA

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

Maximum daytime temperature (°F)

Sun Valley, Idaho, USA
USA (Washington)
41
34
45
39
55
50
66
61
75
68
84
79
88
77
86
68
79
55
68
39
57
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
28
30

Metric (°C)  |  Imperial (°F)

Compare more Sun Valley weather >>

Back to top

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^