Jefferson County, MT Weather Forecast
County weather hub
Sunny
Compare major city weather across Jefferson County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny. High near 46, with temperatures falling to around 43 in the afternoon. Southeast wind around 3 mph.
County Weather Overview
This county weather page brings together forecast coverage for Jefferson County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 1 of 1 mapped cities in Jefferson County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 1:43 PM MDT
- Forecast office
- TFX
- Source
- NOAA / NWS
Daily Outlook
This Week in Jefferson County
Saturday looks like the warmest upcoming period in Jefferson County at 63 degrees F.
Tonight is the coolest period ahead with temperatures near 30 degrees F.
The strongest winds are forecast for Saturday at about 12 mph SSW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 1:43 PM MDT
- Coverage
- 8 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 clear, with a low around 30. South wind around 6 mph.
Mostly sunny, with a high near 60. South wind 5 to 8 mph.
Partly cloudy, with a low around 36. South southwest wind 6 to 9 mph.
Mostly sunny, with a high near 63. South southwest wind around 12 mph, with gusts as high as 23 mph.
Partly cloudy, with a low around 37. West wind 5 to 8 mph.
Sunny, with a high near 59. South southwest wind around 5 mph.
Mostly clear, with a low around 37. Southwest wind around 5 mph.
Sunny, with a high near 62.
Partly cloudy, with a low around 40.
Mostly sunny, with a high near 57.
A chance of rain before midnight. Mostly cloudy, with a low around 39.
A slight chance of rain after noon. Partly sunny, with a high near 54.
Partly cloudy, with a low around 39.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Oct 15
|
Sunny
|
46°F |
3 mph
SE
|
|
Tonight
Oct 15
|
Mostly Clear
|
30°F |
6 mph
S
|
|
Friday
Oct 16
|
Mostly Sunny
|
60°F |
5 to 8 mph
S
|
|
Friday Night
Oct 16
|
Partly Cloudy
|
36°F |
6 to 9 mph
SSW
|
|
Saturday
Oct 17
|
Mostly Sunny
|
63°F |
12 mph
SSW
|
|
Saturday Night
Oct 17
|
Partly Cloudy
|
37°F |
5 to 8 mph
W
|
|
Sunday
Oct 18
|
Sunny
|
59°F |
5 mph
SSW
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
37°F |
5 mph
SW
|
|
Monday
Oct 19
|
Sunny
|
62°F |
5 to 8 mph
SSW
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
40°F |
5 mph
SSW
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
57°F |
6 mph
S
|
|
Tuesday Night
Oct 20
|
Chance Light Rain then Mostly Cloudy
|
39°F |
5 mph
NNW
|
|
Wednesday
Oct 21
|
Partly Sunny then Slight Chance Light Rain
|
54°F |
5 mph
S
|
|
Wednesday Night
Oct 21
|
Partly Cloudy
|
39°F |
5 mph
SW
|
Major City Forecasts
Live forecast snapshots for major cities across Jefferson County.
Coverage
Forecast coverage currently spans 1 of 1 mapped cities in Jefferson County.
Largest mapped city population in this region: 1,661.
