Places › Washington, DC › September
Washington in September
One of the best months — score 84 of 100
Typical September days in Washington reach about 81°F with nights near 64°F.
Avg high
81°F
1991–2020 normal
Avg low
64°F
1991–2020 normal
Rain total
3.93 in
in a typical September
Rain days
9
days with at least 0.01 in
Daylight
12h 24m
at mid-September, computed
What to pack for Washington in September
- A compact rain layer — about 9 days see rain in a typical September.
Every packing line is triggered by a number on this page — the rules are on How we pick.
September vs. the alternatives
The whole year in Washington
JAN
45°F
Rain 10 days
Daylight 9h 43mFEB
48°F
Rain 9 days
Daylight 10h 40mMAR
56°F
Rain 11 days
Daylight 11h 50mAPR
68°F
★ Best
Rain 11 days
Daylight 13h 10mMAY
76°F
Rain 12 days
Daylight 14h 16mJUN
85°F
Rain 11 days
Daylight 14h 53mJUL
90°F
Rain 10 days
Daylight 14h 38mAUG
88°F
Rain 9 days
Daylight 13h 41mSEP
81°F
Rain 9 days
Daylight 12h 24mOCT
69°F
★ Best
Rain 8 days
Daylight 11h 07mNOV
58°F
Rain 8 days
Daylight 10h 00mDEC
49°F
Rain 10 days
Daylight 9h 27m
45°F
Rain 10 days
Daylight 9h 43mFEB
48°F
Rain 9 days
Daylight 10h 40mMAR
56°F
Rain 11 days
Daylight 11h 50mAPR
68°F
★ Best
Rain 11 days
Daylight 13h 10mMAY
76°F
Rain 12 days
Daylight 14h 16mJUN
85°F
Rain 11 days
Daylight 14h 53mJUL
90°F
Rain 10 days
Daylight 14h 38mAUG
88°F
Rain 9 days
Daylight 13h 41mSEP
81°F
Rain 9 days
Daylight 12h 24mOCT
69°F
★ Best
Rain 8 days
Daylight 11h 07mNOV
58°F
Rain 8 days
Daylight 10h 00mDEC
49°F
Rain 10 days
Daylight 9h 27m
Averages are the 1991–2020 climate normals (NOAA National Centers for Environmental Information) for the station named on each page. Rain days = days with at least 0.01 in of precipitation. Daylight is computed for the middle of the month.