Fairfax County (Herndon)
Today
Today weather in Fairfax County
Wednesday, September 16th, 2026
29°
Sunny
Low 15°
Fairfax County will have a warm day Today with temperatures ascending to 29 °F and descending to around 15 °F after sunset. Gentle breezes are expected across Fairfax County Today, with speeds reaching around 10 km/h. There's a slight chance of rain at 5%.
29° / 15°
Temp
5%
Rain
10 km/h
Wind
65%
Humidity
Fairfax County Weather Pages
Fairfax County hourly forecast for today
Scroll right to see more weather forecasts for Fairfax County today
| 12:00 AM | 01:00 AM | 02:00 AM | 03:00 AM | 04:00 AM | 05:00 AM | 06:00 AM | 06:51 AM | 07:00 AM | 08:00 AM | 09:00 AM | 10:00 AM | 11:00 AM | 12:00 PM | 01:00 PM | 02:00 PM | 03:00 PM | 04:00 PM | 05:00 PM | 06:00 PM | 07:00 PM | 07:16 PM | 08:00 PM | 09:00 PM | 10:00 PM | 11:00 PM | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| weather |  | | | | | | |  | | | | |  | | |  | | | | | |  | | | | | Next |
| temperatures | 17.2° | 16.6° | 16.2° | 15.9° | 15.7° | 15.4° | 15.3° | Sunrise | 15.1° | 16° | 18.5° | 20.9° | 23.3° | 25.3° | 27° | 28.1° | 28.9° | 29.2° | 29° | 27.8° | 25.7° | Sunset | 24.2° | 23° | 21.8° | 20.9° | |
| wind speed | 10 km/h | 10 km/h | 9 km/h | 9 km/h | 9 km/h | 7 km/h | 7 km/h | 7 km/h | 7 km/h | 9 km/h | 9 km/h | 10 km/h | 10 km/h | 10 km/h | 11 km/h | 10 km/h | 10 km/h | 9 km/h | 9 km/h | 10 km/h | 10 km/h | 10 km/h | 10 km/h | 9 km/h | |||
| wind degree | 183° | 179° | 184° | 179° | 180° | 184° | 184° | 186° | 194° | 193° | 191° | 190° | 187° | 181° | 177° | 176° | 173° | 173° | 153° | 142° | 150° | 160° | 167° | 170° | |||
| wind direction | S | S | S | S | S | S | S | S | SSW | SSW | S | S | S | S | S | S | S | S | SSE | SE | SSE | SSE | SSE | S | |||
| Precipitation | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | |||
| chance for rain | 7% | 7% | 9% | 10% | 11% | 13% | 13% | 13% | 9% | 5% | 4% | 4% | 2% | 1% | 6% | 2% | 3% | 2% | 4% | 3% | 4% | 5% | 7% | 8% | |||
| chance for snow | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | |||
| humidity | 73% | 75% | 79% | 82% | 85% | 87% | 88% | 89% | 80% | 68% | 60% | 53% | 48% | 44% | 42% | 41% | 41% | 42% | 50% | 59% | 62% | 68% | 74% | 76% | |||
| dew point | 12.3° | 12.2° | 12.5° | 12.9° | 13.1° | 13.3° | 13.3° | 13.3° | 12.5° | 12.6° | 12.9° | 13.3° | 13.6° | 13.9° | 14.1° | 14.3° | 14.5° | 14.8° | 16.5° | 17.1° | 16.5° | 16.8° | 16.9° | 16.5° | |||
| visibility | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | |||
| cloud cover | 5% | 1% | 4% | 5% | 5% | 12% | 5% | 4% | 0% | 5% | 5% | 32% | 12% | 9% | 66% | 27% | 37% | 21% | 34% | 7% | 13% | 5% | 5% | 5% | |||
| UV | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.3 | 1.2 | 2.7 | 4.6 | 6.2 | 6.9 | 6.5 | 5 | 3.3 | 1.6 | 0.5 | 0 | 0 | 0 | 0 | 0 |
View of Fairfax County today
Explore Fairfax County live webcam feed to see how the weather is shaping up today in Fairfax County. See what people are wearing, check out the sky, and get a sense of the atmosphere before you step outside.
Stay informed and make the most of your day with our live weather updates from Fairfax County today.
Weather in Fairfax County today
The weather in Fairfax County today is expected to be much warmer than usual, with a forecast temperature of 29 °F, compared to an average of 21 °F for September 16th in recent years.
temperatures
29 °F
rain
0 mm
wind
10 km/h
UV
High
Fairfax County daylight overview ☀️
Today in Fairfax County, The sun rises at 06:51 and sets at 19:16, giving a total daylight duration of 12 hours and 25 minutes.
Top locations in Fairfax County
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What to wear today in Fairfax County? clothing recommendations
Stay comfortably stylish - your tailored guide for today's Fairfax County forecast.
Short-sleeve shirt
Shorts
Lightweight pants
Sunglasses
Wide brimmed hat
Sunscreen
The weather today in Fairfax County - FAQ
What is the maximum temperature for today in Fairfax County?
The maximum temperature for today in Fairfax County is expected to be 29° degrees. Please dress accordingly to stay comfortable throughout the day.
Will it rain today in Fairfax County? 🌧️
Yes, there is a 5% chance of rain in Fairfax County today. We recommend carrying an umbrella or rain gear to stay dry.
What will be the wind speed today in Fairfax County? 🌀
The wind in Fairfax County is expected to blow at 10 km/h. This could affect outdoor activities, so plan accordingly.
How should I dress for the weather in Fairfax County today?
Given the forecast of 29 °F with a 5% chance of rain, we advise checking our "What to wear today" section for recommendations. There, you will find tailored advice to help you stay comfortable and prepared for the weather conditions in Fairfax County today.
What is the sunrise and sunset time for Fairfax County today?
The sun is expected to rise at 06:51 and set at 19:16 in Fairfax County.
How accurate is the weather forecast Fairfax County today? ✅
Fairfax County weather forecast for today is based on the most current and sophisticated meteorological models available. While we strive for accuracy, weather conditions can change unexpectedly, so we recommend checking for updates regularly.
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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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