Delaware weather by county

3 counties · records since 1895, through September 2026.

Weather › Delaware

Delaware in September 2026

3 of 3 counties ran at least 1° warmer than usual in September 2026, and 0 ran at least 1° cooler.
Warmest against its own records: Kent County (12th-warmest September of 132). Even the least warm, Sussex County, had its 16th-warmest.
Wettest September against its records: Kent County, 5.2 inches (26th-wettest).
2 of 3 counties were in moderate drought or worse on NOAA's Palmer reading for September.
Since 1970 the state's counties have warmed about 0.7° per decade on average, Kent County the most at 0.7°.

This week's forecast against the usual, and every month since 1895, for all 3 counties in Delaware. None had a top-10 warm September in 2026.