United States · 1991–2020 normal
Rockdale in
December.
Typical December weather in Rockdale: 2.6°C by day, -5.4°C at night, 50 mm of rain over 6.7 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high2.6°C
Typical low-5.4°C
Rain50 mm
Wet days6.7
Comfort score 5 this month (September leads the year at 85). Daylight is calculated as 9 h 11 from latitude 41.51°.
Event window
Frost-level nights in December
The measured night-time normal is -5.4°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4907953
- NOAA station
- USC00114530 · JOLIET BRANDON ROAD LOCK/DAM
- Station distance
- 1 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.