Weather in September in Rio Branco

< September >
	Normal Max/ High Temperature	33°C (91°F)
	Average Temperature	25°C (77°F)
	Min/ Low Temperature	21°C (70°F)
	Normal Precipitation	96mm (3.8in)
	Average Daylight per day	12h 03'
	Sun altitude at solar noon on the 21st day.	79.3°

The average temperature in Rio Branco in September is fairly hot at 25.2 °C (77.36 °F).
Afternoons can be very, very hot with average high temperatures reaching 32.8 °C (91 °F).
Overnight temperatures are generally warm with an average low of 20.9 °C (69.6 °F).
The variation/ range of diurnal average temperatures in September is 11.9 °C (21.4 °F).
Precipitation averages for September are high with 96.4mm (3.8 in) recorded.
The shortest day is 11h 55' long and the longest day is 12h 12' long with an average length of 12h 03'.

Weather Trend Graph for September in Rio Branco, Brazil

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