Virginia, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and Climate
Williamsburg, VA

  • The average high temperature in September: 79.4°F

The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (47.4°F).

  • The average low temperature in September: 61.4°F

The month with the highest average low temperature is July (68.8°F).
The coldest month (with the lowest average low temperature) is January (29.6°F).

  • The average rainfall in September: 4.9"

The wettest month (with the highest rainfall) is July (5.4").
Driest months (with the lowest rainfall) are February, June and November (3.3").

  • The average rainfall days in September: 8.6 days

The month with the highest number of rainy days is July (11.8 days).
The month with the lowest number of rainy days is October (7.8 days).

  • The average snowfall in September: 0"

The month with the highest snowfall is February (2.1").
Months with the lowest snowfall are May, June, July, August, September and October (0").

  • The average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (0.7 days).
Months with the lowest number of snowfall days are April, May, June, July, August, September, October and November (0 days).

  • The average daylight in September: 12h

The month with the longest days is June (Average daylight: 15h).
Months with shortest days are January, November and December (Average daylight: 10h).

  • The average sunshine in September: 8h

The month with most sunshine is June (Average sunshine: 10h).
The month with least sunshine is December (Average sunshine: 5h).

  • The average UV index in September: 7

Months with the highest UV index are June, July and August (UV index 9).
Months with the lowest UV index are January and December (UV index 2).