The temperatures in Idaho Falls in August are comfortable with low of 12°C and and high up to 30°C.
The wather in Idaho Falls in August can vary between cold and nice weather days. Expect a few rainy days but usually not more than 3.
Our weather forecast can give you a great sense of what weather to expect in Idaho Falls in August 2025.
If you’re planning to visit Idaho Falls in the near future, we highly recommend that you review the 14 day weather forecast for Idaho Falls before you arrive.
Temperatures
30° / 12°
Rainy Days
2
Snowy Days
0
Dry Days
29
Rainfall
38
mm
Sun Hours
10.8
Hrs
