Weather WorldJefferson County, ID Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Jefferson County Weather Forecast
| TONIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | MONDAY | MONDAY NIGHT |
 |  |  |  |  | | | |  |  | | |
| Chance of T-Storm | Clearing | Mostly Clear | Sunny | Partly Cloudy | Sunny | Partly Cloudy | Partly Cloudy | Mostly Cloudy | Mostly Cloudy | Partly Cloudy | Partly Cloudy |
| Lo: 45°FLo: 7°C | Hi: 70°FHi: 21°C | Lo: 45°FLo: 7°C | Hi: 76°FHi: 24°C | Lo: 49°FLo: 9°C | Hi: 76°FHi: 24°C | Hi: 67°FHi: 19°C Lo: 47°FLo: 8°C | Hi: 67°FHi: 19°C Lo: 47°FLo: 8°C | Hi: 69°FHi: 21°C Lo: 45°FLo: 7°C | Hi: 69°FHi: 21°C Lo: 45°FLo: 7°C | Hi: 65°FHi: 18°C Lo: 41°FLo: 5°C | Hi: 65°FHi: 18°C Lo: 41°FLo: 5°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 1232 PM MDT Tue Sep 22 2026 
Jefferson County Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Jefferson County Weather Map
Jefferson County Quick Facts
Jefferson County Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1136 AM MDT Tue Sep 22 2026
Key Messages
- Showers and thunderstorms ending overnight west to east with brief downpours expected
- Warmer temperatures through Friday
- Breezy Friday afternoon followed by cooler weather this weekend with some potential for showers and storms
Discussion
... Issued at 1105 AM MDT Tue Sep 22 2026
Low pressure will continue shift northeast across Utah, Idaho, and Wyoming through tonight. Stronger showers and storms will produce heavier downpours, with the potential for 0.10"-0.20" in those situations or ...