Monthly Historical AveragesHerndon, VA
Average Temperature
High
24°
Feels 24
Low
13°
Feels 12
Average Precipitation
11 Days
87.4mm
0cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastFriday, May 15, 2026
Day
22°Feels 22
Wind
19 km/h NW
Gust
29 km/h
Humidity
30%
P.O.P
20%
Night
10°Feels 10
Wind
13 km/h NW
Gust
20 km/h
Humidity
80%
P.O.P
30%
Historical AveragesMay 15
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity