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Williston Weather Forecast
| TODAY | TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT |
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| Chance of T-Storm | Mostly Clear | Mostly Sunny | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Chance of T-Storm | Mostly Sunny | Partly Cloudy | Mostly Sunny | Mostly Clear |
| Hi: 95°FHi: 35°C | Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C | Lo: 71°FLo: 22°C | Hi: 95°FHi: 35°C | Lo: 71°FLo: 22°C | Hi: 89°FHi: 32°C | Lo: 70°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 91°FHi: 33°C | Lo: 70°FLo: 21°C |
| POP: 20% | POP: 40% | POP: 70% | POP: 70% | POP: 50% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 307 AM EDT Fri Sep 04 2026 
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Issued: 236 AM EDT Fri Sep 4 2026
Key Messages
- 1. Heat Advisory in effect from 11am until 8pm for Lancaster and Chesterfield Counties today.
- 2. Heat Index values from 105 to 110 possible Saturday.
- 3. Severe storms possible Saturday afternoon or evening.
Discussion
... KEY MESSAGE 1. Heat Advisory in effect from 11am until 8pm for Lancaster and Chesterfield Counties today.
The ridge will slowly begin to retrograde through the day today, but 850mb temperatures near the NAEFS 99th percentile and robust heating should once again yield t...