Herndon (VA)
October
Weather in Herndon, Virginia for October 2026
Your guide to Herndon weather in October - trends and predictions
In general, the average temperature in Herndon at the beginning of October is 23.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 12.9 °C by the end of October.
Herndon experiences moderate rainfall in October, with an average of 9 rainy days and a total precipitation of 329.6 mm.
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Temperatures
Rain 🌧️
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22
Dry days
9
Rainy days
0
Snow days
18°/10°
Temperatures
18 km/h
Avg max wind
67 %
Avg humidity
Herndon Weather October
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Temperatures trend during October in Herndon
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October weather in Herndon day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Oct. 1 |  Cloudy | 22° /15° | 0 mm | 5 | |
| Oct. 2 |  Overcast | 20° /10° | 0 mm | 5 | |
| Oct. 3 | Cloudy | 22° /13° | 0 mm | 5 | |
| Oct. 4 |  Partly cloudy | 27° /11° | 0 mm | 5 | |
| Oct. 5 | Partly cloudy | 27° /13° | 0 mm | 4 | |
| Oct. 6 |  Mist | 23° /15° | 0 mm | 3 | |
| Oct. 7 | Overcast | 25° /16° | 0.2 mm | 4 | |
| Oct. 8 |  Heavy rain | 21° /14° | 62.6 mm | 3 | |
| Oct. 9 |  Sunny | 18° /8° | 0 mm | 4 | |
| Oct. 10 | Overcast | 15° /4° | 0 mm | 4 | |
| Oct. 11 |  Moderate or heavy rain shower | 19° /13° | 8.2 mm | 2 | |
| Oct. 12 | Overcast | 16° /13° | 4.7 mm | 1 | |
| Oct. 13 |  Moderate rain | 12° /11° | 26.1 mm | 1 | |
| Oct. 14 |  Light rain | 17° /13° | 2.1 mm | 1 | |
| Oct. 15 | Partly cloudy | 19° /12° | 0 mm | 3 | |
| Oct. 16 | Sunny | 19° /5° | 0 mm | 3 | |
| Oct. 17 | Partly cloudy | 17° /6° | 0 mm | 3 | |
| Oct. 18 | Partly cloudy | 20° /9° | 0 mm | 3 | |
| Oct. 19 | Overcast | 23° /14° | 2 mm | 3 | |
| Oct. 20 | Overcast | 19° /10° | 6 mm | 3 | |
| Oct. 21 | Cloudy | 22° /8° | 0 mm | 3 | |
| Oct. 22 | Partly cloudy | 17° /9° | 0 mm | 3 | |
| Oct. 23 | Overcast | 15° /8° | 0 mm | 3 | |
| Oct. 24 | Partly cloudy | 14° /6° | 0 mm | 3 | |
| Oct. 25 | Cloudy | 14° /4° | 0 mm | 3 | |
| Oct. 26 | Overcast | 14° /5° | 0 mm | 1 | |
| Oct. 27 | Overcast | 11° /8° | 0 mm | 1 | |
| Oct. 28 | Overcast | 10° /5° | 0 mm | 1 | |
| Oct. 29 | Moderate or heavy rain shower | 10° /6° | 115.9 mm | 0 | |
| Oct. 30 |  Moderate or heavy rain with thunder | 14° /9° | 101.8 mm | 0 | |
| Oct. 31 | Sunny | 17° /6° | 0 mm | 2 | |
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Important Notice
Our weather forecast for Herndon in October 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 Herndon forecast closer to your planned date for the most up-to-date weather information.
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Herndon in October - FAQ
What are the expected maximum and minimum temperatures in Herndon during October?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Herndon during October?
Significant rainfall exceeding 329.6 mm is expected in Herndon during October, occurring over more than 9 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Herndon during October?
The average wind speed in Herndon during October is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
October rainfall patterns in Herndon
Explore the daily rainfall trends and prepare for Herndons October weather 💧
Typically, Herndon has 9 rainy days in October with a total of 329.6 mm of rainfall.
UV exposure in Herndon during October
Stay informed about UV levels for safe outdoor activities throughout the month of October ☀️
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