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South Run, VA weather and climate

Fairfax County, VA · population 6,714 · about 308 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at South Run's own coordinates.

The year at a glance

Sunny days
207
clear or partly cloudy, per year
Precipitation
42 in
per year
Wet days
118
rain or snow per year
Snowfall
15 in
per year
Hot days
27
above 90 °F
Freezing nights
93
at or below 32 °F
Humidity
70%
average relative
Average temperature
56 °F
year round

Monthly temperatures

Average daily high and low for each month, in °F.

Daily highDaily low
406080JanMarMayJulSepNovDaily high, Jan: 43 °FDaily high, Feb: 46 °FDaily high, Mar: 54 °FDaily high, Apr: 66 °FDaily high, May: 74 °FDaily high, Jun: 82 °FDaily high, Jul: 86 °FDaily high, Aug: 85 °FDaily high, Sep: 78 °FDaily high, Oct: 67 °FDaily high, Nov: 56 °FDaily high, Dec: 47 °FDaily low, Jan: 25 °FDaily low, Feb: 26 °FDaily low, Mar: 33 °FDaily low, Apr: 43 °FDaily low, May: 54 °FDaily low, Jun: 63 °FDaily low, Jul: 69 °FDaily low, Aug: 67 °FDaily low, Sep: 59 °FDaily low, Oct: 47 °FDaily low, Nov: 36 °FDaily low, Dec: 30 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high434654667482868578675647
Daily low252633435463696759473630

Monthly precipitation

Total rain plus melted snow for each month, in inches.

0.02.04.0JanMarMayJulSepNovSouth Run, Jan: 3.1 inSouth Run, Feb: 2.8 inSouth Run, Mar: 3.9 inSouth Run, Apr: 3.4 inSouth Run, May: 3.7 inSouth Run, Jun: 3.5 inSouth Run, Jul: 3.8 inSouth Run, Aug: 3.5 inSouth Run, Sep: 4.3 inSouth Run, Oct: 3.4 inSouth Run, Nov: 2.9 inSouth Run, Dec: 3.4 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
South Run3.12.83.93.43.73.53.83.54.33.42.93.4

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovSouth Run, Jan: 17 daysSouth Run, Feb: 15 daysSouth Run, Mar: 16 daysSouth Run, Apr: 16 daysSouth Run, May: 16 daysSouth Run, Jun: 17 daysSouth Run, Jul: 19 daysSouth Run, Aug: 19 daysSouth Run, Sep: 18 daysSouth Run, Oct: 19 daysSouth Run, Nov: 18 daysSouth Run, Dec: 17 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
South Run171516161617191918191817

Compare South Run with another city

Nearby cities and popular picks. Any two cities can be compared from the home page.

See weather for every covered Virginia city

About this data

Figures are 30 year averages for 1991-2020. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).