United States · 1991–2020 normal
Riverhead in
December.
Typical December weather in Riverhead: 7.4°C by day, -0.2°C at night, 115 mm of rain over 9.6 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high7.4°C
Typical low-0.2°C
Rain115 mm
Wet days9.6
Comfort score 5 this month (September leads the year at 84). Daylight is calculated as 9 h 15 from latitude 40.92°. Open-water sea temperature is 8.1°C (23 km from the place centre).
Event window
Frost-level nights in December
The measured night-time normal is -0.2°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 5133926
- NOAA station
- USC00307134 · RIVERHEAD RSCH FARM
- Station distance
- 6.8 km from the place centre
- Coverage
- Strong coverage · 29 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.