United States · 1991–2020 normal
Fairfax in
January.
Typical January weather in Fairfax: 9.5°C by day, -4.6°C at night, 33 mm of rain over 2.8 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high9.5°C
Typical low-4.6°C
Rain33 mm
Wet days2.8
Comfort score 17 this month (October leads the year at 79). Daylight is calculated as 9 h 55 from latitude 36.57°.
Event window
Frost-level nights in January
The measured night-time normal is -4.6°C, so frost is typical rather than exceptional this month.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4536099
- NOAA station
- USC00347390 · RALSTON
- Station distance
- 8.5 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.