N 10 mph
Feels like: 70°F
Precip: 0%
World Resorts USA Washington Weather September Weather in Washington

Washington Weather: September

Average Day Temperature: 82.0°F
Average Night Temperature: 67.7°F
Sea Water Temperature: 76.7°F
Number of Sunny Days: 14 days
Sunshine Hours: 11.8 - 13.0 hours
Number of Rainy Days: 5 days
Precipitation Totals: 3.1 in

Air Temperature in September, °F

Select Year: 2020 2019 2018

The highest day temperature in September 2020 was 95°F. The lowest night temperature was 55°F. The average values for day and night temperatures during September were 80.2°F и 68.1°F respectivly.

Washington Water Sea Temperature in September, °F

Select Year: 2020 2019 2018

The average sea surface temperature in September 2020 for Washington was 78.2°F. The maximum and minimum values were 71.0°F and 84.2°F respectively.

Sunny, Cloudy and Gloomy days

Most of the days in September are sunny but you can also expect cloudy and gloomy days.

Precipitation Totals in September, in

Precipitation total in September for Washington is 3.1 in.

Wind Speed in September, mph

The average wind speed in September is 6.5 mph. It makes September one of the most windless months of the year for Washington.

Average Sunny Hours Per Day

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Washington in September is 7.5 hours.

Best Time to Visit Washington
The most sunny months:
July 16 days
October 15 days
November 15 days
The most warm months:
July 93.3 °F
August 90.2 °F
June 86.1 °F
Warmest sea temperature:
July 83.5 °F
August 82.1 °F
June 77.5 °F
The most cold months:
January 38.2 °F
February 43.1 °F
December 45.6 °F
The most rainy months:
August 7 days
May 7 days
July 7 days
The most windy months:
April 9 mph
March 9 mph
February 9 mph

Washington on the Weather Map

USA Resorts:
Boston +68
Chicago +60
Hawaii +84
Honolulu +86
Houston +86
Jacksonville +78
Las Vegas +102
Los Angeles +100
Miami +86
New Orleans +82
New York +70
San Diego +90
San Francisco +66
San Jose +96
Washington +70
24 Hours Weather Forecast
Local time: 20:25
30 sep, wednesday
2100 70°F
10 mph
01 oct, thursday
0000 62°F
9 mph
0300 60°F
7 mph
0600 60°F
4 mph
0900 64°F
4 mph
1200 72°F
6 mph
1500 76°F
6 mph
1800 72°F
4 mph