Weather in Grand Junction: September
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Average day temperature: | 81.6°F |
| Average night temperature: | 54.5°F | |
 |
Number of sunny days: | 23 days |
| Day length: | 11.8 - 13.0 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 0.6 in. | |
| more information | ||
14 days
forecast
forecast
| Grand Junction |
weather in
October
October
| Grand Junction |
Air temperature in September, °F
Show year:
2025
2024
2023
The highest day temperature during September of 2025 was 91°F. At the same time the lowest night temperature was 43°F. Daily and nightly averages during September were 79.2°F and 52.5°F.
Sunny, partly cloudy and cloudy days
Mostly all days in September are sunny but cloudy days are also possible.
Precipitation total in September, in.
Precipitation total value in Grand Junction in September is 0.6 in. Other months of the year show relatively similar values.
Wind speed in September, mph
The average wind speed value in September is 6.1 mph
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in September is: 10.3.
Best time for vacation in Grand Junction
Grand Junction on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Grand Junction
Local time: 03:20
September 19, saturday
0600
57°F
NW
3 mph
3 mph
0900
63°F
NW
6 mph
6 mph
1200
75°F
N
6 mph
6 mph
1500
73°F
SE
9 mph
9 mph
1800
77°F
SE
10 mph
10 mph
2100
64°F
N
2 mph
2 mph
September 20, sunday
0000
61°F
E
4 mph
4 mph
0300
57°F
SE
2 mph
2 mph
