Fairfax (VA)
May
Weather in Fairfax, Virginia for May 2026
Your guide to Fairfax weather in May - trends and predictions
The forecast for the next days in Fairfax predicts temperatures to be around 21 °F, close to the historical average.
In general, the average temperature in Fairfax at the beginning of May is 21.9 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 22.9 °F by the end of May.
Fairfax experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 342.4 mm.
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Temperatures
Rain 🌧️
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10
Dry days
21
Rainy days
0
Snow days
22°/14°
Temperatures
15 km/h
Avg max wind
75 %
Avg humidity
Fairfax Weather May
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Temperatures trend during May in Fairfax
See the weather trend as well as the moving average line
May weather in Fairfax day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Light rain shower | 21° /12° | 0.6 mm | 6 | |
| May 2 |  Overcast | 23° /12° | 0 mm | 7 | |
| May 3 |  Sunny | 24° /12° | 0.5 mm | 7 | |
| May 4 |  Light rain | 20° /12° | 19.7 mm | 6 | |
| May 5 | Light rain shower | 24° /14° | 9.6 mm | 7 | |
| May 6 |  Moderate rain | 29° /12° | 6.4 mm | 3.5 | |
| May 7 | Patchy rain possible | 12° /8° | 2.5 mm | 1.1 | |
| May 8 | Sunny | 20° /5° | 0 mm | 0.7 | |
| May 9 | Patchy rain possible | 22° /11° | 1.6 mm | 3 | |
| May 10 | Patchy rain possible | 27° /9° | 0.2 mm | 4 | |
| May 11 |  Mist | 17° /12° | 0 mm | 3 | |
| May 12 |  Partly cloudy | 23° /9° | 0 mm | 5 | |
| May 13 | Partly cloudy | 27° /12° | 0.1 mm | 5 | |
| May 14 | Patchy rain possible | 27° /16° | 0.3 mm | 5 | |
| May 15 | Patchy rain possible | 32° /18° | 2.1 mm | 5 | |
| May 16 | Patchy rain possible | 13° /12° | 1.7 mm | 3 | |
| May 17 | Patchy rain possible | 12° /9° | 2.6 mm | 3 | |
| May 18 | Patchy rain possible | 11° /9° | 0.5 mm | 3 | |
| May 19 | Sunny | 17° /7° | 0 mm | 4 | |
| May 20 | Fog | 20° /12° | 0.1 mm | 5 | |
| May 21 | Mist | 22° /12° | 23.1 mm | 5 | |
| May 22 |  Thundery outbreaks possible | 26° /14° | 6.2 mm | 6 | |
| May 23 | Light rain shower | 22° /13° | 3.9 mm | 5 | |
| May 24 | Patchy rain possible | 24° /13° | 0.1 mm | 6 | |
| May 25 | Thundery outbreaks possible | 25° /14° | 0.1 mm | 6 | |
| May 26 |  Patchy light rain with thunder | 26° /15° | 3.9 mm | 6 | |
| May 27 | Light rain shower | 25° /15° | 6.8 mm | 6 | |
| May 28 |  Cloudy | 20° /13° | 30.2 mm | 5 | |
| May 29 | Light rain shower | 23° /13° | 4.6 mm | 5 | |
| May 30 | Patchy rain possible | 21° /14° | 10.8 mm | 5 | |
| May 31 | Sunny | 20° /12° | 53.4 mm | 5 | |
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Important Notice
Our weather forecast for Fairfax in May 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 forecast closer to your planned date for the most up-to-date weather information.
Change Month
Fairfax in May - FAQ
What are the expected maximum and minimum temperatures in Fairfax during May?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Fairfax during May?
Significant rainfall exceeding 342.4 mm is expected in Fairfax during May, occurring over more than 21 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Fairfax during May?
The average wind speed in Fairfax during May is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Fairfax
Explore the daily rainfall trends and prepare for Fairfaxs May weather 💧
Typically, Fairfax has 21 rainy days in May with a total of 342.4 mm of rainfall.
UV exposure in Fairfax during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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