Fairfax, us-Virginia State, USA Weather Information
Local Time
2026-03-12 07:10:57 Eastern Standard TimeWeather in the past year
Sun & Astronomy
In Fairfax, us-Virginia State, USA, today's sunrise time is 07:23, sunset time is 19:14, nautical twilight begins at 06:27, nautical twilight ends at 20:10, astronomical twilight begins at 05:56, astronomical twilight ends at 20:41.
Temperature Analysis
In Fairfax, us-Virginia State, USA region, the lowest temperature occurs in January 2025, with an average temperature of about -2°C.
The highest temperature occurs in July 2025, with a maximum temperature of up to 26.2°C.
Based on historical data, the average temperature in January is -2°C, February is 2.3°C, March is 9.8°C, April is 14.6°C, May is 17.9°C, June is 24.2°C, July is 26.2°C, August is 22.6°C, September is 20.8°C, October is 14.1°C, November is 8.7°C, December is 1.7°C.
Wind Analysis
In Fairfax, us-Virginia State, USA region, the lowest wind speed occurs in July 2025, with an average wind speed of about 29.4 km/h.
The highest wind speed occurs in March 2025, with a maximum wind speed of up to 47 km/h.
Based on historical data, the average wind speed in January is 42.1 km/h, February is 42.9 km/h, March is 47 km/h, April is 44.5 km/h, May is 39.3 km/h, June is 31 km/h, July is 29.4 km/h, August is 30.6 km/h, September is 31.3 km/h, October is 37.4 km/h, November is 41.7 km/h, December is 41 km/h.
Sunshine Duration Analysis
In Fairfax, us-Virginia State, USA region, the lowest sunshine duration occurs in December 2025, with an average sunshine duration of about 4.8 hours.
The highest sunshine duration occurs in July 2025, with a maximum sunshine duration of up to 11.3 hours.
Based on historical data, the average sunshine duration in January is 6.6 hours, February is 6.2 hours, March is 8.9 hours, April is 8 hours, May is 8.7 hours, June is 10.6 hours, July is 11.3 hours, August is 9.5 hours, September is 8.5 hours, October is 8.2 hours, November is 7.1 hours, December is 4.8 hours.
Precipitation Analysis
In Fairfax, us-Virginia State, USA region, the lowest precipitation occurs in October 2025, with an average precipitation of about 1.3 mm.
The highest precipitation occurs in May 2025, with a maximum precipitation of up to 8.1 mm.
Based on historical data, the average precipitation in January is 2 mm, February is 2.9 mm, March is 1.9 mm, April is 3.3 mm, May is 8.1 mm, June is 5.1 mm, July is 5.4 mm, August is 2 mm, September is 2.4 mm, October is 1.3 mm, November is 1.5 mm, December is 1.6 mm.