Access Fairfax County weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.

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Fairfax County long range weather forecast

30 day weather forecast for Fairfax County

August

October

Important Notice

Our Fairfax County long range weather forecast is based on historical data analysis rather than real-time forecasting models. While this provides a general outlook, weather conditions can change. We recommend checking the forecast closer to your planned date for the most current information.

Rain Forecast for the Next 14 Days in Fairfax County

The chart displays the expected rainfall values (in mm) over the next 14 days in Fairfax County, highlighting variations in precipitation levels for specific dates. ☔

Fairfax County Wind Speed Forecast Chart

This chart illustrates the projected daily max wind speed (in km) in Fairfax County over the next two weeks, providing insights into periods of increased or decreased wind activity. 🌀

Frequently asked questions about the weather in Fairfax County

How warm is it in Fairfax County over the next 14 days?

Over the next two weeks, temperatures in Fairfax County are expected to range from around 14 °F on the coldest nights up to about 31 °F on the warmest days. Use this range to plan what to pack and wear.

Will it rain in Fairfax County in the next two weeks?

Yes - rain is expected on about 9 of the next 14 days in Fairfax County, with roughly 42.2 mm of rainfall in total. It is worth keeping an umbrella or raincoat handy.

How windy is it in Fairfax County?

Maximum wind speeds in Fairfax County are forecast to reach about 22 km/h at their peak over the next 14 days.

When is the best time to visit Fairfax County?

For a month-by-month look at temperatures and rainfall, see our best time to visit Fairfax County guide.

How accurate is the 14-day forecast for Fairfax County?

Our Fairfax County forecast uses leading meteorological models and is most reliable over the next few days. Long-range days beyond a week show general trends and can change, so check back closer to the date for updates.

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Where is Fairfax County?

Get accurate weather forecasts for Fairfax County, located at latitude 38.97 and longitude -77.386. Stay updated with localized weather information tailored for Fairfax County.

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Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
		1 32°	2 31°	3 31°	4 34°	5 31°
6 30°	7 27°	8 28°	9 28°	10 27°	11 26°	12 29°
13 29°	14 28°	15 27°	16 29°	17 31°	18 28°	19 25°
20 28°	21 23°	22 25°	23 28°	24 28°	25 21°	26 25°
27 26°	28 27°	29 30°	30 25°