Fairfax County (Herndon)
July
Weather in Fairfax County, Virginia for July 2027
Your guide to Fairfax County weather in July - trends and predictions
In general, the average temperature in Fairfax County at the beginning of July is 34.6 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 32.9 °F by the end of July.
Fairfax County in July brings notable rainfall, with an average of 17 rainy days and a total precipitation of 313.9 mm.
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Temperatures
Rain 🌧️
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14
Dry days
17
Rainy days
0
Snow days
33°/23°
Temperatures
12 km/h
Avg max wind
71 %
Avg humidity
Fairfax County Weather July
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Temperatures trend during July in Fairfax County
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July weather in Fairfax County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Jul. 1 |  Moderate or heavy rain shower | 36° /23° | 12.3 mm | 12 | |
| Jul. 2 |  Fog | 35° /23° | 0 mm | 9 | |
| Jul. 3 |  Sunny | 37° /23° | 0 mm | 13 | |
| Jul. 4 | Sunny | 37° /23° | 0.7 mm | 12 | |
| Jul. 5 |  Partly cloudy | 34° /21° | 3.5 mm | 13 | |
| Jul. 6 | Sunny | 32° /21° | 9.2 mm | 10 | |
| Jul. 7 |  Light rain shower | 31° /23° | 12 mm | 7 | |
| Jul. 8 |  Thundery outbreaks possible | 33° /23° | 57.3 mm | 11 | |
| Jul. 9 | Fog | 30° /22° | 40.4 mm | 7 | |
| Jul. 10 | Light rain shower | 29° /21° | 53.4 mm | 7 | |
| Jul. 11 | Fog | 31° /20° | 2.8 mm | 10 | |
| Jul. 12 |  Overcast | 31° /22° | 5.3 mm | 10 | |
| Jul. 13 | Light rain shower | 29° /20° | 7.2 mm | 8 | |
| Jul. 14 | Thundery outbreaks possible | 34° /20° | 0 mm | 9 | |
| Jul. 15 | Fog | 35° /22° | 0 mm | 10 | |
| Jul. 16 |  Heavy rain at times | 34° /24° | 5.9 mm | 11 | |
| Jul. 17 |  Heavy rain | 35° /22° | 25.5 mm | 11 | |
| Jul. 18 | Light rain shower | 34° /23° | 10.9 mm | 11 | |
| Jul. 19 | Light rain shower | 30° /22° | 11.3 mm | 8 | |
| Jul. 20 |  Cloudy | 33° /20° | 0 mm | 12 | |
| Jul. 21 | Overcast | 31° /22° | 19.9 mm | 11 | |
| Jul. 22 | Cloudy | 30° /19° | 1.8 mm | 12 | |
| Jul. 23 | Overcast | 29° /19° | 0 mm | 11 | |
| Jul. 24 | Mist | 32° /18° | 0 mm | 11 | |
| Jul. 25 | Light rain shower | 33° /21° | 3.1 mm | 12 | |
| Jul. 26 | Overcast | 31° /21° | 2.3 mm | 9 | |
| Jul. 27 | Moderate or heavy rain shower | 33° /22° | 13.8 mm | 9 | |
| Jul. 28 | Sunny | 34° /23° | 9.7 mm | 11 | |
| Jul. 29 | Mist | 32° /22° | 0 mm | 11 | |
| Jul. 30 | Fog | 34° /22° | 0 mm | 11 | |
| Jul. 31 | Overcast | 33° /21° | 7.6 mm | 9 | |
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Important Notice
Our weather forecast for Fairfax County in July 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.
Change Month
Fairfax County in July - FAQ
What are the expected maximum and minimum temperatures in Fairfax County during July?
During July, expect a variety of temperatures with highs around 33° and lows near 23°, suitable for diverse activities and preferences.
How much rainfall should be expected in Fairfax County during July?
Significant rainfall exceeding 313.9 mm is expected in Fairfax County during July, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Fairfax County during July?
The average wind speed in Fairfax County during July is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
July rainfall patterns in Fairfax County
Explore the daily rainfall trends and prepare for Fairfax Countys July weather 💧
Typically, Fairfax County has 17 rainy days in July with a total of 313.9 mm of rainfall.
UV exposure in Fairfax County during July
Stay informed about UV levels for safe outdoor activities throughout the month of July ☀️
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