Weather in Frederick in September
How warm is it in Frederick in September?
In September the typical daytime high in Frederick is 25.8 °C on average, from 28.2 °C at the start to 23.0 °C at the end of the month.
That is 3.5 °C cooler than in August and 6.0 °C warmer than in October.
The last 10 years were 1.2 °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.
The average of the weather stations Washington (64 km), Carlisle Wtp (92 km) and Dover (167 km); nearer ones count more.