Sun Valley weather live forecast

Today's maximum temperature in Sun Valley is expected to be 19°C. Select a day from the live weather forecast for Sun Valley, Idaho, USA for more weather parameters.

Tuesday
20th Oct
19

2

7

4
Wednesday
21st Oct
17

4

3

3
Thursday
22nd Oct
16

4

2

2
Friday
23rd Oct
9

-1

0

2
Saturday
24th Oct
8

-5

10

4

5-day weather forecast updated at 04:01 on Tuesday 20th October 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 Tuesday 20th October 2026

Expect scattered clouds in Sun Valley, Idaho with a maximum temperature of 19°C, maximum UV of 4 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the north.

19
°C maximum temperature
2
°C minimum temperature
scattered clouds
7
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
19
°C wind chill
7
kph wind from N

Sun Valley weather for Wednesday 21st October 2026

Expect mostly cloudy with light rain in Sun Valley, Idaho with a maximum temperature of 17°C, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 2-5 mm of rainfall expected with 52% chance of some rain and little or no wind of 6 kph from the south-east.

17
°C maximum temperature
4
°C minimum temperature
mostly cloudy with light rain
3
hours of sunshine
3
UV index (Moderate)
52
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
6
kph wind from SE

Sun Valley weather for Thursday 22nd October 2026

Expect isolated thunderstorms in Sun Valley, Idaho with a maximum temperature of 16°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 5-10 mm of rainfall expected with 96% chance of some rain and a light breeze of 8 kph from the south-east.

16
°C maximum temperature
4
°C minimum temperature
isolated thunderstorms
2
hours of sunshine
2
UV index (Low)
96
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
8
kph wind from SE

Sun Valley weather for Friday 23rd October 2026

Expect mostly cloudy with rain in Sun Valley, Idaho with a maximum temperature of 9°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 71% chance of some rain and a light breeze of 7 kph from the north-west.

9
°C maximum temperature
-1
°C minimum temperature
mostly cloudy with rain
0
hours of sunshine
2
UV index (Low)
71
% chance of some rain
<20
mm of rainfall expected
9
°C wind chill
7
kph wind from NW

Sun Valley weather for Saturday 24th October 2026

Expect scattered clouds in Sun Valley, Idaho with a maximum temperature of 8°C, maximum UV of 4 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 5 kph from the north.