Weather in Riverside: September
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Average day temperature: | 90.6°F |
| Average night temperature: | 69.8°F | |
 |
Number of sunny days: | 27 days |
| Day length: | 11.9 - 12.9 hours | |
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Number of rainy days: | 0 days |
| Precipitation totals: | 0.1 in. | |
| more information | ||
14 days
forecast
forecast
| Riverside |
weather in
October
October
| Riverside |
Air temperature in September, °F
Show year:
2025
2024
2023
The highest day temperature during September of 2025 was 100°F. At the same time the lowest night temperature was 61°F. Daily and nightly averages during September were 88.2°F and 68.8°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 Riverside in September is 0.1 in. Other months of the year show relatively similar values.
Wind speed in September, mph
The average wind speed value in September is 4.2 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: 11.1.
Best time for vacation in Riverside
Riverside on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Riverside
Local time: 15:13
December 14, sunday
1800
70°F
E
3 mph
3 mph
2100
63°F
S
2 mph
2 mph
December 15, monday
0000
59°F
SW
2 mph
2 mph
0300
55°F
SW
2 mph
2 mph
0600
55°F
SW
2 mph
2 mph
0900
63°F
SW
2 mph
2 mph
1200
77°F
N
0 mph
0 mph
1500
81°F
SE
4 mph
4 mph
