Fairfax County (Herndon)
Tomorrow
Tomorrow weather in Fairfax County
Thursday, September 17th, 2026
31°
Sunny
Low 18°
The weather tomorrow in Fairfax County will be a bit hotter than today, with max temperatures of 30°.
The rain will visit again tomorrow in Fairfax County and the expected precipitation are 6 mm.
31° / 18°
Temp
64%
Rain
14 km/h
Wind
69%
Humidity
Fairfax County Weather Pages
Fairfax County hourly forecast for tomorrow
Scroll right to see more weather forecasts for Fairfax County tomorrow
| 12:00 AM | 01:00 AM | 02:00 AM | 03:00 AM | 04:00 AM | 05:00 AM | 06:00 AM | 06:52 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 | 07:15 PM | 08:00 PM | 09:00 PM | 10:00 PM | 11:00 PM | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| weather |  | | | | | | |  | | | | |  | | | | | |  | | |  |  | | | | Next |
| temperatures | 20.4° | 20° | 19.6° | 19.2° | 18.8° | 18.7° | 18.5° | Sunrise | 18° | 18.5° | 20.8° | 23.3° | 25.7° | 26.6° | 27.4° | 28.8° | 29.9° | 30.5° | 30.1° | 27.6° | 25° | Sunset | 24.2° | 23.1° | 22.8° | 22.7° | |
| Feels like | 20.9° | 20.3° | 20° | 19.6° | 19.5° | 19° | 18.3° | 18° | 18.1° | 20° | 22.3° | 25.1° | 26.5° | 27.4° | 28.6° | 29.9° | 30.8° | 30.8° | 30.1° | 29.2° | 28.2° | 26.7° | 26.1° | 25.9° | |||
| wind speed | 8 km/h | 9 km/h | 9 km/h | 8 km/h | 7 km/h | 8 km/h | 9 km/h | 8 km/h | 9 km/h | 11 km/h | 12 km/h | 13 km/h | 14 km/h | 14 km/h | 13 km/h | 11 km/h | 9 km/h | 10 km/h | 7 km/h | 1 km/h | 3 km/h | 4 km/h | 6 km/h | 5 km/h | |||
| wind degree | 172° | 174° | 172° | 181° | 191° | 171° | 169° | 187° | 184° | 196° | 192° | 203° | 210° | 206° | 205° | 205° | 206° | 196° | 186° | 281° | 209° | 221° | 215° | 216° | |||
| wind direction | S | S | S | S | SSW | S | S | S | S | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | SSW | S | WNW | SSW | SW | SW | SW | |||
| 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 | 0.1 mm | 0.7 mm | 1.8 mm | 0.6 mm | 1.8 mm | 1.5 mm | 0.1 mm | |||
| chance for rain | 8% | 10% | 10% | 10% | 10% | 10% | 9% | 10% | 8% | 5% | 4% | 4% | 3% | 2% | 1% | 1% | 2% | 14% | 54% | 73% | 59% | 77% | 77% | 41% | |||
| 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 | 77% | 79% | 81% | 82% | 83% | 82% | 80% | 80% | 76% | 66% | 57% | 50% | 47% | 44% | 42% | 42% | 43% | 48% | 72% | 81% | 85% | 89% | 91% | 91% | |||
| dew point | 16.2° | 16.3° | 16.3° | 16.1° | 15.8° | 15.5° | 15° | 14.6° | 14.1° | 14.1° | 14.3° | 14.4° | 14.3° | 14.3° | 14.8° | 15.8° | 16.7° | 17.8° | 22.1° | 21.5° | 21.5° | 21.2° | 21.3° | 21.1° | |||
| 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 | 6% | 17% | 7% | 5% | 5% | 5% | 5% | 5% | 5% | 6% | 17% | 32% | 31% | 10% | 5% | 5% | 23% | 97% | 100% | 100% | 100% | 98% | 100% | 100% | |||
| UV | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.3 | 1.2 | 2.5 | 2.2 | 5.8 | 7.2 | 6.8 | 5.3 | 3.4 | 1.4 | 0.2 | 0 | 0 | 0 | 0 | 0 |
Weather in Fairfax County tomorrow
The weather in Fairfax County tomorrow is expected to be significantly warmer than usual, with a forecast temperature of 31 °F, compared to an average of 16 °F for September 17th in recent years.
temperatures
31 °F
rain
6.5 mm
wind
14 km/h
UV
High
Fairfax County daylight overview ☀️
Tomorrow in Fairfax County, The sun rises at 06:52 and sets at 19:15, giving a total daylight duration of 12 hours and 23 minutes.
Top locations in Fairfax County
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What to wear tomorrow in Fairfax County? clothing recommendations
Stay comfortably stylish - your tailored guide for tomorrow's Fairfax County forecast.
Short-sleeve shirt
Shorts
Lightweight pants
Breathable footwear
Sunglasses
Wide brimmed hat
Sunscreen
Flip flop
Umbrella
The weather tomorrow in Fairfax County - FAQ
What is the maximum temperature for tomorrow in Fairfax County?
The maximum temperature for tomorrow in Fairfax County is expected to be 31° degrees. Please dress accordingly to stay comfortable throughout the day.
Will it rain tomorrow in Fairfax County? 🌧️
Yes, there is a 64% chance of rain in Fairfax County tomorrow. We recommend carrying an umbrella or rain gear to stay dry.
What will be the wind speed tomorrow in Fairfax County? 🌀
The wind in Fairfax County is expected to blow at 14 km/h. This could affect outdoor activities, so plan accordingly.
How should I dress for the weather in Fairfax County tomorrow?
Given the forecast of 31 °F with a 64% chance of rain, we advise checking our "What to wear tomorrow" section for recommendations. There, you will find tailored advice to help you stay comfortable and prepared for the weather conditions in Fairfax County tomorrow.
What is the sunrise and sunset time for Fairfax County tomorrow?
The sun is expected to rise at 06:52 and set at 19:15 in Fairfax County.
How accurate is the weather forecast Fairfax County tomorrow? ✅
Fairfax County weather forecast for tomorrow 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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