United States · 1991–2020 normal
Derby in
December.
Typical December weather in Derby: 6.4°C by day, -1.2°C at night, 101 mm of rain over 9.3 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high6.4°C
Typical low-1.2°C
Rain101 mm
Wet days9.3
Comfort score 5 this month (September leads the year at 87). Daylight is calculated as 9 h 12 from latitude 41.32°. Open-water sea temperature is 7.8°C (22 km from the place centre).
Event window
Frost-level nights in December
The measured night-time normal is -1.2°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4832745
- NOAA station
- USW00094702 · IGOR I SIKORSKY MEM AP
- Station distance
- 17.7 km from the place centre
- Coverage
- Strong coverage · 30 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.