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Annandale, VA weather and climate

Fairfax County, VA · population 41,982 · about 358 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Annandale'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
28
above 90 °F
Freezing nights
89
at or below 32 °F
Humidity
69%
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: 55 °FDaily high, Apr: 66 °FDaily high, May: 74 °FDaily high, Jun: 82 °FDaily high, Jul: 87 °FDaily high, Aug: 85 °FDaily high, Sep: 78 °FDaily high, Oct: 67 °FDaily high, Nov: 57 °FDaily high, Dec: 47 °FDaily low, Jan: 26 °FDaily low, Feb: 27 °FDaily low, Mar: 34 °FDaily low, Apr: 44 °FDaily low, May: 54 °FDaily low, Jun: 63 °FDaily low, Jul: 68 °FDaily low, Aug: 67 °FDaily low, Sep: 59 °FDaily low, Oct: 47 °FDaily low, Nov: 37 °FDaily low, Dec: 30 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high434655667482878578675747
Daily low262734445463686759473730

Monthly precipitation

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

0.02.04.0JanMarMayJulSepNovAnnandale, Jan: 3.1 inAnnandale, Feb: 2.8 inAnnandale, Mar: 3.9 inAnnandale, Apr: 3.4 inAnnandale, May: 3.7 inAnnandale, Jun: 3.5 inAnnandale, Jul: 3.8 inAnnandale, Aug: 3.5 inAnnandale, Sep: 4.3 inAnnandale, Oct: 3.4 inAnnandale, Nov: 2.9 inAnnandale, Dec: 3.4 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Annandale3.12.83.93.43.73.53.83.54.33.42.93.4

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovAnnandale, Jan: 17 daysAnnandale, Feb: 15 daysAnnandale, Mar: 16 daysAnnandale, Apr: 16 daysAnnandale, May: 16 daysAnnandale, Jun: 17 daysAnnandale, Jul: 19 daysAnnandale, Aug: 19 daysAnnandale, Sep: 18 daysAnnandale, Oct: 19 daysAnnandale, Nov: 18 daysAnnandale, Dec: 17 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Annandale171516161617191918191817

Compare Annandale 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).