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United States weather

Weather in Fairfax County, Virginia for August 2027

Your guide to Fairfax County weather in August - trends and predictions

    Rain 🌧️

  • The climate of Fairfax County in August is notably wet, with an average of 12 rainy days, and a total of 185.9 mm of precipitation.

    • More

  • Is August a good time to visit Fairfax County? check out the best time to travel to Fairfax County page.

  • ✨ Is August a good time to visit Fairfax County? – Ask the AI Weatherman

Average dry days
19
Dry days
Average rainy days
12
Rainy days
Average snowy days
0
Snow days
Average temperatures
30°/19°
Temperatures
Average wind speed
13 km/h
Avg max wind
Average humidity
69 %
Avg humidity

Fairfax County Weather August

Move between months or click on a day
July
September
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Moderate rain
29°
2
Moderate rain
27°
3
Light rain
30°
4
Mist
32°
5
Light rain
28°
6
Patchy rain possible
30°
7
Overcast
29°
8
Light rain
31°
9
Partly cloudy
32°
10
Light rain
33°
11
Partly cloudy
32°
12
Mist
33°
13
Thundery outbreaks possible
33°
14
Light rain
30°
15
Moderate rain
31°
16
Moderate rain
30°
17
Thundery outbreaks possible
35°
18
Overcast
28°
19
Mist
28°
20
Heavy rain
31°
21
Light rain
26°
22
Light rain
29°
23
Moderate rain
30°
24
Overcast
29°
25
Mist
29°
26
Cloudy
28°
27
Moderate rain
27°
28
Partly cloudy
28°
29
Cloudy
29°
30
Cloudy
31°
31
Overcast
28°

Temperatures trend during August in Fairfax County

See the weather trend as well as the moving average line

August weather in Fairfax County day by day

Click on a date for more information
July September
Date Weather Temperatures Rain UV More
Aug. 1 Moderate rain
Moderate rain
 29° /19° 16.1 mm 7
Aug. 2 Moderate rain
Moderate rain
 27° /20° 12.4 mm 10
Aug. 3 Light rain
Light rain
 30° /20° 3.3 mm 10
Aug. 4 Mist
Mist
 32° /19° 0 mm 10.4
Aug. 5 Light rain
Light rain
 28° /22° 9.1 mm 5
Aug. 6 Patchy rain possible
Patchy rain possible
 30° /22° 1.1 mm 9
Aug. 7 Overcast
Overcast
 29° /21° 0.9 mm 9
Aug. 8 Light rain
Light rain
 31° /20° 5.6 mm 10.2
Aug. 9 Partly cloudy
Partly cloudy
 32° /21° 0 mm 10.2
Aug. 10 Light rain
Light rain
 33° /21° 9.4 mm 10.1
Aug. 11 Partly cloudy
Partly cloudy
 32° /19° 0.6 mm 10.1
Aug. 12 Mist
Mist
 33° /21° 0.5 mm 10
Aug. 13 Thundery outbreaks possible
Thundery outbreaks possible
 33° /23° 0.2 mm 9.9
Aug. 14 Light rain
Light rain
 30° /23° 9.9 mm 9
Aug. 15 Moderate rain
Moderate rain
 31° /23° 16 mm 9
Aug. 16 Moderate rain
Moderate rain
 30° /22° 12.6 mm 6
Aug. 17 Thundery outbreaks possible
Thundery outbreaks possible
 35° /22° 4.5 mm 8
Aug. 18 Overcast
Overcast
 28° /20° 0.3 mm 6
Aug. 19 Mist
Mist
 28° /18° 0.1 mm 6
Aug. 20 Heavy rain
Heavy rain
 31° /20° 41 mm 7
Aug. 21 Light rain
Light rain
 26° /18° 4.9 mm 5
Aug. 22 Light rain
Light rain
 29° /19° 5.3 mm 6
Aug. 23 Moderate rain
Moderate rain
 30° /17° 15.3 mm 9.3
Aug. 24 Overcast
Overcast
 29° /18° 0.4 mm 9.2
Aug. 25 Mist
Mist
 29° /18° 0 mm 9.1
Aug. 26 Cloudy
Cloudy
 28° /15° 0 mm 8
Aug. 27 Moderate rain
Moderate rain
 27° /17° 15.3 mm 8
Aug. 28 Partly cloudy
Partly cloudy
 28° /18° 0.6 mm 8.9
Aug. 29 Cloudy
Cloudy
 29° /16° 0 mm 8.8
Aug. 30 Cloudy
Cloudy
 31° /16° 0.4 mm 8.7
Aug. 31 Overcast
Overcast
 28° /17° 0.2 mm 7
Next
Important Notice
Our weather forecast for Fairfax County in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Fairfax County forecast closer to your planned date for the most up-to-date weather information.
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Fairfax County in August - FAQ

What are the expected maximum and minimum temperatures in Fairfax County during August?
Expect warm days with temperatures around 30°, cooling to mild conditions of 19° after sunset. Perfect for those who enjoy warm weather.

How much rainfall should be expected in Fairfax County during August?
Significant rainfall exceeding 185.9 mm is expected in Fairfax County during August, occurring over more than 12 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Fairfax County during August?
The average wind speed in Fairfax County during August is 13 km/h, suggesting breezy to windy conditions, depending on your activities.

August rainfall patterns in Fairfax County

Explore the daily rainfall trends and prepare for Fairfax Countys August weather 💧
Typically, Fairfax County has 12 rainy days in August with a total of 185.9 mm of rainfall.

UV exposure in Fairfax County during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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