Jefferson Island, MT Weather Forecast
Local 7-day forecast
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Jefferson Island, MT in one place.
A slight chance of rain showers between 9am and noon, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 57. West wind 13 to 25 mph, with gusts as high as 37 mph. Chance of precipitation is 20%.
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: Jun 10, 2026 1:28 AM MDT.
The active forecast window currently covers Jun 10 to Jun 16, 2026 for Jefferson Island, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 10 to Jun 16, 2026
- Latest sync
- Jun 10, 2026 1:28 AM MDT
- Forecast office
- TFX
- Source
- NOAA / NWS
Daily Outlook
This Week in Jefferson Island
Tuesday looks like the warmest upcoming period in Jefferson Island at 78 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 38 degrees F.
The strongest winds are forecast for Wednesday at about 13 to 25 mph W.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 10, 2026 1:28 AM MDT
- 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
A slight chance of rain showers between 11pm and 4am. Mostly cloudy, with a low around 38. West wind 9 to 24 mph, with gusts as high as 40 mph. Chance of precipitation is 20%.
Sunny, with a high near 71. West southwest wind 8 to 12 mph, with gusts as high as 23 mph.
Mostly clear, with a low around 40. West wind 1 to 12 mph, with gusts as high as 22 mph.
Sunny, with a high near 76. West southwest wind 1 to 12 mph, with gusts as high as 23 mph.
Partly cloudy, with a low around 42. North northwest wind 5 to 14 mph, with gusts as high as 24 mph.
A slight chance of rain showers before noon, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 66. North northeast wind 3 to 12 mph, with gusts as high as 21 mph.
A slight chance of rain showers before midnight. Partly cloudy, with a low around 40.
A slight chance of rain showers before noon. Sunny, with a high near 67.
Partly cloudy, with a low around 40.
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 72.
Partly cloudy, with a low around 43.
Sunny, with a high near 78.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Jun 10
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
57°F |
13 to 25 mph
W
|
|
Wednesday Night
Jun 10
|
Slight Chance Rain Showers
|
38°F |
9 to 24 mph
W
|
|
Thursday
Jun 11
|
Sunny
|
71°F |
8 to 12 mph
WSW
|
|
Thursday Night
Jun 11
|
Mostly Clear
|
40°F |
1 to 12 mph
W
|
|
Friday
Jun 12
|
Sunny
|
76°F |
1 to 12 mph
WSW
|
|
Friday Night
Jun 12
|
Partly Cloudy
|
42°F |
5 to 14 mph
NNW
|
|
Saturday
Jun 13
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
66°F |
3 to 12 mph
NNE
|
|
Saturday Night
Jun 13
|
Slight Chance Rain Showers then Partly Cloudy
|
40°F |
5 to 18 mph
NNE
|
|
Sunday
Jun 14
|
Slight Chance Rain Showers then Sunny
|
67°F |
3 to 9 mph
NE
|
|
Sunday Night
Jun 14
|
Partly Cloudy
|
40°F |
2 to 12 mph
N
|
|
Monday
Jun 15
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
72°F |
1 to 7 mph
NNW
|
|
Monday Night
Jun 15
|
Partly Cloudy
|
43°F |
2 to 8 mph
NW
|
|
Tuesday
Jun 16
|
Sunny
|
78°F |
2 to 10 mph
WSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Jefferson Island.