The temperatures in Grand Junction in August are comfortable with low of 12°C and and high up to 31°C.
You can expect about 3 to 8 days of rain in Grand Junction during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Grand Junction in August 2025.
If you’re planning to visit Grand Junction in the near future, we highly recommend that you review the 14 day weather forecast for Grand Junction before you arrive.
Temperatures
31° / 12°
Rainy Days
3
Snowy Days
0
Dry Days
28
Rainfall
50
mm
Sun Hours
10.9
Hrs
