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Weather in September in Washington, District Of Columbia

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< September >
 
Normal Max/ High Temperature 27°C (80°F)
 
Average Temperature 22°C (71°F)
 
Min/ Low Temperature 17°C (62°F)
Average Sea or Water Temp 25°C(77°F)
 
Normal Precipitation 84mm (3.3in)
Number of Wet Days (probability of rain on a day) 9 (30%)
Average Sunlight per day 07:34
Average Daylight per day 12:23
Sunny (Cloudy) Daylight Hours 62% (38%)
Sun altitude at solar noon on the 21st day.
51.7°


  • The average sea tempeature is 25 °C (77 °F).
  • The average temperature in Washington, District Of Columbia in September is really warm at 21.8 °C (71.24 °F).
  • Afternoons can be hot with average high temperatures reaching 26.7 °C (80.1 °F).
  • Overnight temperatures are generally very mild with an average low of 16.9 °C (62.4 °F).
  • The average daily temperature variation/ range in September is 9.8 °C (17.6 °F).
  • The weather in September is dryish with some rain. Just 84.1mm (3.3in) of water accrues during on average 9 days.
  • The heavens above Washington, District Of Columbia are slightly sunny having on average a welcome 7:34 of magnificent sunshine daily.
  • The shortest day is 11:46 long and the longest day is 13:00 long with an average length of 12:23.
  • There are approximately 4:39 per day when bright sunshine is absent due to cloud, haze or the sun being too low on the horizon to register.
  • It is sunny approximately 62% of daylight hours and cloudy 38% of daylight hours.

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Weather Trend Graph for September in Washington, District Of Columbia, Usa

Graph of weather in Washington, District Of Columbia in September

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