Weather in Rio Branco: September
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Average day temperature: | 97.6°F |
| Average night temperature: | 76.3°F | |
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Number of sunny days: | 15 days |
| Day length: | 11.9 - 12.2 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 0.5 in. | |
| more information | ||
14 days
forecast
forecast
| Rio Branco |
weather in
October
October
| Rio Branco |
Air temperature in September, °F
Show year:
2026
2025
2024
The highest day temperature during September of 2026 was 104°F. At the same time the lowest night temperature was 63°F. Daily and nightly averages during September were 94.8°F and 76.6°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 Rio Branco in September is 0.5 in. Other months of the year show relatively similar values.
Wind speed in September, mph
The average wind speed value in September is 4.1 mph It makes September most windy month of the year.
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: 8.2.
Best time for vacation in Rio Branco
Rio Branco on a weather map
Places in Brazil:
Name
°F
24 Hours Forecast
Rio Branco
Local time: 15:35
October 05, monday
1800
91°F
S
6 mph
6 mph
2100
84°F
S
3 mph
3 mph
October 06, tuesday
0000
79°F
S
4 mph
4 mph
0300
79°F
S
6 mph
6 mph
0600
79°F
SE
3 mph
3 mph
0900
97°F
SE
6 mph
6 mph
1200
106°F
SE
5 mph
5 mph
1500
100°F
SE
3 mph
3 mph
