United States · 1991–2020 normal
Rockville in
September.
Typical September weather in Rockville: 26.7°C by day, 13.1°C at night, 78 mm of rain over 5.7 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high26.7°C
Typical low13.1°C
Rain78 mm
Wet days5.7
Comfort score 79 this month, the highest of the year. Daylight is calculated as 12 h 24 from latitude 39.76°.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4263850
- NOAA station
- USC00127522 · ROCKVILLE
- Station distance
- 0.4 km from the place centre
- Coverage
- Strong coverage · 28 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.