Sun Valley weather live forecast

Today's maximum temperature in Sun Valley is expected to be 21°C. Select a day from the live weather forecast for Sun Valley, Idaho, USA for more weather parameters.

Sunday
30th Aug
21

7

13

7
Monday
31st Aug
25

3

13

7
Tuesday
1st Sep
24

8

5

6
Wednesday
2nd Sep
18

7

5

6
Thursday
3rd Sep
19

5

4

6

5-day weather forecast updated at 04:01 on Sunday 30th August 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 30th August 2026

Expect scattered clouds in Sun Valley, Idaho with a maximum temperature of 21°C, maximum UV of 7 (High) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the south-west.

21
°C maximum temperature
7
°C minimum temperature
scattered clouds
13
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
10
kph wind from SW

Sun Valley weather for Monday 31st August 2026

Expect clear skies in Sun Valley, Idaho with a maximum temperature of 25°C, maximum UV of 7 (High) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the south.

25
°C maximum temperature
3
°C minimum temperature
clear skies
13
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
25
°C wind chill
6
kph wind from S

Sun Valley weather for Tuesday 1st September 2026

Expect mostly cloudy with light rain in Sun Valley, Idaho with a maximum temperature of 24°C, maximum UV of 6 (High) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 44% chance of some rain and a light breeze of 12 kph from the south.

24
°C maximum temperature
8
°C minimum temperature
mostly cloudy with light rain
5
hours of sunshine
6
UV index (High)
44
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
12
kph wind from S

Sun Valley weather for Wednesday 2nd September 2026

Expect mostly cloudy with light rain in Sun Valley, Idaho with a maximum temperature of 18°C, maximum UV of 6 (High) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 8% chance of some rain and a gentle breeze of 16 kph from the south-west.

18
°C maximum temperature
7
°C minimum temperature
mostly cloudy with light rain
5
hours of sunshine
6
UV index (High)
8
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
16
kph wind from SW

Sun Valley weather for Thursday 3rd September 2026

Expect mostly cloudy with light rain in Sun Valley, Idaho with a maximum temperature of 19°C, maximum UV of 6 (High) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 4% chance of some rain and a light breeze of 12 kph from the south-west.