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Town of Herndon, VAHerndon, VA Weather Forecast
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Herndon Weather Forecast
| REST OF TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  |  | | |  |  | | | | | |
| Chance of Showers | Chance of Showers | Chance of Showers | Showers | Chance of Showers | Mostly Sunny | Clear | Sunny | Clear | Sunny | Mostly Clear | Sunny |
| Lo: 59°FLo: 15°C | Hi: 69°FHi: 21°C | Lo: 59°FLo: 15°C | Hi: 65°FHi: 18°C | Lo: 59°FLo: 15°C | Hi: 71°FHi: 22°C | Lo: 49°FLo: 9°C | Hi: 61°FHi: 16°C | Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C | Lo: 49°FLo: 9°C | Hi: 70°FHi: 21°C |
| POP: 70% | POP: 40% | POP: 50% | POP: 90% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1055 PM EDT Fri Oct 02 2026 
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Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 900 PM EDT Fri Oct 2 2026
Key Messages
- 1) A stalling cold front may bring rain at times today through Sunday.
- 2) First widespread frost and freeze potential west of the Blue Ridge early next week.
Discussion
... KEY MESSAGE 1...A stalling cold front may bring rain at times today through Sunday.
A prefrontal trough ahead of the main airmass change associated with the approaching cold front has kicked off scattered showers. These were most noticeable east of the Blue Ridge where slightly higher instability was present. This ac...