Monthly Historical AveragesFairfax, VA
Average Temperature
High
8°
Feels 7
Low
0°
Feels -2
Average Precipitation
9 Days
54.1mm
10.5cm
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Daily Historical Averages
S
M
T
W
T
F
S
ForecastMonday, December 29, 2025
Day
14°Feels 13
Wind
30 km/h W
Gust
45 km/h
Humidity
25%
P.O.P
30%
Night
-2°Feels -8
Wind
29 km/h W
Gust
44 km/h
Humidity
50%
P.O.P
20%
Historical AveragesDec 29
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity