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Washington Weather in September, USA

Washington Averages September

WASHINGTON AVERAGES FOR SEPTEMBER

  • What is Average Temperature?
    The average high temperature and the average low temperature for that month, on a daily basis, divided by 2 equals the average temperature for that month

    Temperature

    22°C
    72°F
  • What is Average High Low Temperature?
    The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily

    High Temperature

    27°C
    81°F
  • What is Average High Low Temperature?
    The sum of high temperatures/low temperatures divided by the number of days in that month, recorded daily

    Low Temperature

    17°C
    63°F
  • What is Average Sea Temperature?
    Average daily sea temperatures and divided by the number of days in the month. Sea Temperatures are taken from buoys, ships and even satellites can calculate sea temperature based on energy that is radiated from the sea's surface

    Sea Temperature

    23°C
    73°F
  • What are Average Daily Sunshine Hours?
    Total sunshine hours for the month, divided by the number of days in the month. Sunshine hours are taken with a sunshine recorder, either a Campbell-Stokes recorder or an Eppley Pyreheliometer

    Sunshine Hours

    9 hours
  • What is Average Rainfall?
    The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years

    Rainfall Days

    11 days
  • What is Average Rainfall?
    The amount of mm in rain for that month divided by the number of days, and the number of days that it rains during that month on average, over a given period of years

    Rainfall

    80 mm

Slide and Tap Other Months

Washington Daily Averages September

September 2024 Daily Averages

Sun
1 Avg 24º 75º
Mon
2 Avg 24º 75º
Tue
3 Avg 24º 75º
Wed
4 Avg 25º 77º
Thu
5 Avg 23º 73º
Fri
6 Avg 22º 72º
Sat
7 Avg 23º 73º
8 Avg 24º 75º
9 Avg 23º 73º
10 Avg 23º 73º
11 Avg 22º 72º
12 Avg 22º 72º
13 Avg 23º 73º
14 Avg 22º 72º
15 Avg 21º 70º
16 Avg 21º 70º
17 Avg 20º 68º
18 Avg 21º 70º
19 Avg 20º 68º
20 Avg 21º 70º
21 Avg 21º 70º
22 Avg 22º 72º
23 Avg 22º 72º
24 Avg 21º 70º
25 Avg 20º 68º
26 Avg 20º 68º
27 Avg 21º 70º
28 Avg 20º 68º
29 Avg 18º 64º
30 Avg 18º 64º
Forecast
Avg Historical Daily Average