Jefferson Island, MT Weather Forecast
Local 7-day forecast
Patchy Fog then Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Jefferson Island, MT in one place.
Patchy fog before 9am. Mostly sunny. High near 50, with temperatures falling to around 46 in the afternoon. Southwest wind 6 to 9 mph, with gusts as high as 20 mph.
Local Weather Overview
This forecast page for Jefferson Island, MT is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Nov 5, 2026 4:49 PM MST.
The active forecast window currently covers Nov 6 to Nov 11, 2026 for Jefferson Island, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Nov 6 to Nov 11, 2026
- Latest sync
- Nov 5, 2026 4:49 PM MST
- Forecast office
- TFX
- Source
- NOAA / NWS
Daily Outlook
This Week in Jefferson Island
Sunday looks like the warmest upcoming period in Jefferson Island at 58 degrees F.
Friday Night is the coolest period ahead with temperatures near 31 degrees F.
The strongest winds are forecast for Sunday at about 7 to 14 mph SW.
The forecast from Nov 6 through Nov 11 stays mostly dry.
Forecast Details
- Last updated
- Nov 5, 2026 4:49 PM MST
- Coverage
- 7 days
- Time zone
- America/Denver
- Forecast office
- TFX
- Radar station
- KTFX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly cloudy, with a low around 31. West southwest wind 8 to 12 mph.
Mostly sunny, with a high near 55. Southwest wind 1 to 8 mph.
Mostly clear, with a low around 33. South southwest wind 1 to 9 mph.
Mostly sunny, with a high near 58. Southwest wind 7 to 14 mph, with gusts as high as 29 mph.
Mostly cloudy, with a low around 31. West southwest wind 2 to 7 mph.
Partly sunny, with a high near 53.
Mostly cloudy, with a low around 33.
Mostly sunny, with a high near 56.
Partly cloudy, with a low around 34.
Mostly sunny, with a high near 57.
Partly cloudy, with a low around 35.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Nov 6
|
Patchy Fog then Mostly Sunny
|
50°F |
6 to 9 mph
SW
|
|
Friday Night
Nov 6
|
Mostly Cloudy
|
31°F |
8 to 12 mph
WSW
|
|
Saturday
Nov 7
|
Mostly Sunny
|
55°F |
1 to 8 mph
SW
|
|
Saturday Night
Nov 7
|
Mostly Clear
|
33°F |
1 to 9 mph
SSW
|
|
Sunday
Nov 8
|
Mostly Sunny
|
58°F |
7 to 14 mph
SW
|
|
Sunday Night
Nov 8
|
Mostly Cloudy
|
31°F |
2 to 7 mph
WSW
|
|
Monday
Nov 9
|
Partly Sunny
|
53°F |
2 mph
WSW
|
|
Monday Night
Nov 9
|
Mostly Cloudy
|
33°F |
0 to 7 mph
W
|
|
Tuesday
Nov 10
|
Mostly Sunny
|
56°F |
5 to 9 mph
SW
|
|
Tuesday Night
Nov 10
|
Partly Cloudy
|
34°F |
5 to 8 mph
SW
|
|
Veterans Day
Nov 11
|
Mostly Sunny
|
57°F |
2 to 6 mph
SW
|
|
Wednesday Night
Nov 11
|
Partly Cloudy
|
35°F |
2 to 6 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Jefferson Island.