Washington · United States
Weather in Washington in September
In September the typical daytime high in Washington is 26.0 °C on average, from 28.5 °C at the start to 23.3 °C at the end of the month.
The last 10 years were 0.5 °C warmer than more than 40 years ago.
Click a day for more: afternoon and night, the usual range, records and how fast it is warming.
Measured at the weather station Washington, 2 km away.