Weather in Rio Branco: September
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Average day temperature: | 98.0°F |
| Average night temperature: | 76.3°F | |
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Number of sunny days: | 17 days |
| Day length: | 11.9 - 12.2 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 0.4 in. | |
| more information | ||
14 days
forecast
forecast
| Rio Branco |
weather in
October
October
| Rio Branco |
Air temperature in September, °F
Show year:
2025
2024
2023
The highest day temperature during September of 2025 was 101°F. At the same time the lowest night temperature was 68°F. Daily and nightly averages during September were 95.8°F and 74.2°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 0.4 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 one of the most windy months 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: 8.6.
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: 00:48
December 05, friday
0300
72°F
SE
2 mph
2 mph
0600
72°F
NE
2 mph
2 mph
0900
72°F
SE
2 mph
2 mph
1200
75°F
S
2 mph
2 mph
1500
77°F
S
3 mph
3 mph
1800
79°F
S
2 mph
2 mph
2100
75°F
S
4 mph
4 mph
December 06, saturday
0000
73°F
S
4 mph
4 mph
