Sun Valley weather live forecast

Today's maximum temperature in Sun Valley is expected to be 20°C. Select a day from the live weather forecast for Sun Valley, Idaho, USA for more weather parameters.

Sunday
27th Sep
20

6

1

4
Monday
28th Sep
19

6

4

5
Tuesday
29th Sep
20

3

12

6
Wednesday
30th Sep
21

4

12

6
Thursday
1st Oct
22

5

12

6

5-day weather forecast updated at 04:01 on Sunday 27th September 2026 GMT

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The 5-day weather forecast for Idaho (Sun Valley) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Sun Valley weather forecast by day

Below are the detailed weather forecasts for Sun Valley for the next 5 days.

Sun Valley weather for Sunday 27th September 2026

Expect broken clouds in Sun Valley, Idaho with a maximum temperature of 20°C, maximum UV of 4 (Moderate) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 5 kph from the north.

20
°C maximum temperature
6
°C minimum temperature
broken clouds
1
hour of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
5
kph wind from N

Sun Valley weather for Monday 28th September 2026

Expect broken clouds in Sun Valley, Idaho with a maximum temperature of 19°C, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 5 kph from the north.

19
°C maximum temperature
6
°C minimum temperature
broken clouds
4
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
19
°C wind chill
5
kph wind from N

Sun Valley weather for Tuesday 29th September 2026

Expect clear skies in Sun Valley, Idaho with a maximum temperature of 20°C, maximum UV of 6 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the north.

20
°C maximum temperature
3
°C minimum temperature
clear skies
12
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
6
kph wind from N

Sun Valley weather for Wednesday 30th September 2026

Expect clear skies in Sun Valley, Idaho with a maximum temperature of 21°C, maximum UV of 6 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the north.

21
°C maximum temperature
4
°C minimum temperature
clear skies
12
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
7
kph wind from N

Sun Valley weather for Thursday 1st October 2026

Expect clear skies in Sun Valley, Idaho with a maximum temperature of 22°C, maximum UV of 6 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the north.