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Weather in Grand Junction, Colorado for August 2026

Your guide to Grand Junction weather in August - trends and predictions

    Temperatures

  • So far, August 2026 in Grand Junction shows a warmer trend than usual by 3.1 °F.

  • The forecast for the next days in Grand Junction predicts a temperature of 31.2 °F, which is cooler than the historical average.

  • In general, the average temperature in Grand Junction at the beginning of August is 37.7 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 27.7 °F by the end of August.

    • Rain 🌧️

  • Precipitation in Grand Junction during August is a rare event, with an average of fewer than 2 rainy days.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
30
Dry days
Average rainy days
1
Rainy days
Average snowy days
0
Snow days
Average temperatures
32°/13°
Temperatures
Average wind speed
23 km/h
Avg max wind
Average humidity
31 %
Avg humidity

Grand Junction Weather August

Move between months or click on a day
July
September
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
37°
2
Partly cloudy
37°
3
Sunny
38°
4
Overcast
38°
5
Cloudy
37°
6
Partly cloudy
38°
7
Partly cloudy
39°
8
Cloudy
38°
9
Overcast
35°
10
Overcast
34°
11
Sunny
35°
12
Sunny
36°
13
Patchy rain possible
28°
14
Patchy rain possible
29°
15
Sunny
30°
16
Sunny
30°
17
Sunny
31°
18
Sunny
31°
19
Patchy rain possible
31°
20
Patchy rain possible
30°
21
Sunny
32°
22
Sunny
29°
23
Sunny
31°
24
Sunny
35°
25
Sunny
34°
26
Light rain shower
23°
27
Thundery outbreaks possible
27°
28
Overcast
28°
29
Overcast
23°
30
Sunny
28°
31
Sunny
31°

Temperatures trend during August in Grand Junction

See the weather trend as well as the moving average line

August weather in Grand Junction day by day

Click on a date for more information
July September
Date Weather Temperatures Rain UV More
Aug. 1 Sunny
Sunny
 37° /16° 0 mm 11
Aug. 2 Partly cloudy
Partly cloudy
 37° /16° 0 mm 11
Aug. 3 Sunny
Sunny
 38° /17° 0 mm 11
Aug. 4 Overcast
Overcast
 38° /15° 0 mm 11
Aug. 5 Cloudy
Cloudy
 37° /15° 0 mm 10
Aug. 6 Partly cloudy
Partly cloudy
 38° /16° 0 mm 11
Aug. 7 Partly cloudy
Partly cloudy
 39° /16° 0 mm 11
Aug. 8 Cloudy
Cloudy
 38° /17° 0 mm 10
Aug. 9 Overcast
Overcast
 35° /17° 0 mm 10
Aug. 10 Overcast
Overcast
 34° /17° 0 mm 10
Aug. 11 Sunny
Sunny
 35° /16° 0 mm 10
Aug. 12 Sunny
Sunny
 36° /18° 1.2 mm 8.6
Aug. 13 Patchy rain possible
Patchy rain possible
 28° /16° 5.2 mm 8.8
Aug. 14 Patchy rain possible
Patchy rain possible
 29° /15° 1.7 mm 9.1
Aug. 15 Sunny
Sunny
 30° /15° 0.2 mm 8.5
Aug. 16 Sunny
Sunny
 30° /17° 0.6 mm 8
Aug. 17 Sunny
Sunny
 31° /16° 1 mm 8
Aug. 18 Sunny
Sunny
 31° /15° 0.1 mm 8
Aug. 19 Patchy rain possible
Patchy rain possible
 31° /17° 9.5 mm 8
Aug. 20 Patchy rain possible
Patchy rain possible
 30° /17° 1.8 mm 7
Aug. 21 Sunny
Sunny
 32° /16° 0 mm 8
Aug. 22 Sunny
Sunny
 29° /17° 2.8 mm 6
Aug. 23 Sunny
Sunny
 31° /15° 0 mm 8
Aug. 24 Sunny
Sunny
 35° /19° 0.1 mm 8
Aug. 25 Sunny
Sunny
 34° /19° 0.7 mm 8
Aug. 26 Light rain shower
Light rain shower
 23° /15° 3.8 mm 5
Aug. 27 Thundery outbreaks possible
Thundery outbreaks possible
 27° /15° 0 mm 6
Aug. 28 Overcast
Overcast
 28° /16° 0 mm 6
Aug. 29 Overcast
Overcast
 23° /15° 0 mm 5
Aug. 30 Sunny
Sunny
 28° /9° 0 mm 7
Aug. 31 Sunny
Sunny
 31° /9° 0 mm 8
Next
Important Notice
Our weather forecast for Grand Junction in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Grand Junction forecast closer to your planned date for the most up-to-date weather information.
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Grand Junction in August - FAQ

What are the expected maximum and minimum temperatures in Grand Junction during August?
Expect warm days with temperatures around 32°, cooling to mild conditions of 13° after sunset. Perfect for those who enjoy warm weather.

How much rainfall should be expected in Grand Junction during August?
Rainfall in Grand Junction during August is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 1 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.

What are the typical wind conditions in Grand Junction during August?
The average wind speed in Grand Junction during August is 23 km/h, suggesting breezy to windy conditions, depending on your activities.

August rainfall patterns in Grand Junction

Explore the daily rainfall trends and prepare for Grand Junctions August weather 💧
Typically, Grand Junction has 1 rainy days in August with a total of 3.8 mm of rainfall.

UV exposure in Grand Junction during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️

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Location coordinates Where is Grand Junction?

Get accurate weather forecasts for Grand Junction, located at latitude 39.064 and longitude -108.551. Stay updated with localized weather information tailored for Grand Junction.

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