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Weather in September in Block Island, Ri

< September >
	Normal Max/ High Temperature	21°C (69°F)
	Average Temperature	18°C (64°F)
	Min/ Low Temperature	14°C (58°F)
	Normal Precipitation	80mm (3.1in)
	Average Daylight per day	12h 25'
	Sun altitude at solar noon on the 21st day.	49.7°

The average temperature in Block Island, Ri in September is very mild at 17.6 °C (63.68 °F).
Afternoons can be warm with average high temperatures reaching 20.8 °C (69.4 °F).
Overnight temperatures are generally mild with an average low of 14.3 °C (57.7 °F).
The range/ variation of daily mean temperatures in September is 6.5 °C (11.7 °F).
Precipitation averages for September are moderate with 79.5mm (3.1 in) recorded.
The shortest day is 11h 45' long and the longest day is 13h 05' long with an average length of 12h 25'.

Weather Trend Graph for September in Block Island, Ri, Usa

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