North Carolina, USA
Long term weather forecast
Long term weather forecast

September weather forecast and Climate
Raleigh, NC

  • Average high temperature in September: 82.1°F

Warmest month (with highest average high temperature) is July (90.2°F).
Month with lowest average high temperature is January (50.9°F).

  • Average low temperature in September: 61.7°F

Month with highest average low temperature is July (69.9°F).
Coldest month (with lowest average low temperature) is January (31°F).

  • Average humidity in September: 77.1%

Month with highest relative humidity is August (77.9%).
Month with lowest relative humidity is April (61.7%).

  • Average rainfall in September: 4.4"

Wettest month (with highest rainfall) is July (4.7").
Driest month (with lowest rainfall) is April (2.9").

  • Average rainfall days in September: 8 days

Month with highest number of rainy days is July (11.9 days).
Month with lowest number of rainy days is October (7.3 days).

  • Average snowfall in September: 0"

Month with highest snowfall is January (2.9").
Months with lowest snowfall are May, June, July, August, September and October (0").

  • Average snowfall days in September: 0 days

Month with highest number of snowfall days is February (1.3 days).
Months with lowest number of snowfall days are May, June, July, August, September and October (0 days).

  • Average daylight in September: 12h

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

  • Average sunshine in September: 7.3h

Month with most sunshine is June (Average sunshine: 8.9).
Month with least sunshine is December (Average sunshine: 5.1).

  • Average UV index in September: 8

Months with highest UV index are June and July (UV index 10).
Month with lowest UV index is December (UV index 2).