Chelsea, MT Weather Forecast
Local 7-day forecast
Partly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Chelsea, MT in one place.
Partly sunny, with a high near 68. Northeast wind around 13 mph, with gusts as high as 20 mph.
Local Weather Overview
This forecast page for Chelsea, 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: Sep 14, 2026 9:17 PM MDT.
The active forecast window currently covers Sep 16 to Sep 21, 2026 for Chelsea, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 16 to Sep 21, 2026
- Latest sync
- Sep 14, 2026 9:17 PM MDT
- Forecast office
- GGW
- Source
- NOAA / NWS
Daily Outlook
This Week in Chelsea
Monday looks like the warmest upcoming period in Chelsea at 76 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 41 degrees F.
The strongest winds are forecast for Wednesday at about 13 mph NE.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 14, 2026 9:17 PM MDT
- Coverage
- 6 days
- Time zone
- America/Denver
- Forecast office
- GGW
- Radar station
- KGGW
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 41. East northeast wind 5 to 12 mph.
Sunny, with a high near 74. East southeast wind 5 to 10 mph, with gusts as high as 18 mph.
Partly cloudy, with a low around 51. East wind 7 to 10 mph.
A chance of rain showers before noon, then a chance of showers and thunderstorms. Partly sunny, with a high near 74. Northeast wind around 9 mph. Chance of precipitation is 50%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 51. Northeast wind around 10 mph. Chance of precipitation is 60%.
A chance of rain showers before noon, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 70. Northeast wind around 10 mph. Chance of precipitation is 50%.
A chance of showers and thunderstorms before midnight, then a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 49. Northeast wind around 8 mph.
Mostly sunny, with a high near 73.
Partly cloudy, with a low around 46.
Mostly sunny, with a high near 76.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Sep 16
|
Partly Sunny
|
68°F |
13 mph
NE
|
|
Wednesday Night
Sep 16
|
Mostly Clear
|
41°F |
5 to 12 mph
ENE
|
|
Thursday
Sep 17
|
Sunny
|
74°F |
5 to 10 mph
ESE
|
|
Thursday Night
Sep 17
|
Partly Cloudy
|
51°F |
7 to 10 mph
E
|
|
Friday
Sep 18
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
74°F |
9 mph
NE
|
|
Friday Night
Sep 18
|
Showers And Thunderstorms Likely
|
51°F |
10 mph
NE
|
|
Saturday
Sep 19
|
Chance Rain Showers
|
70°F |
10 mph
NE
|
|
Saturday Night
Sep 19
|
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
49°F |
8 mph
NE
|
|
Sunday
Sep 20
|
Mostly Sunny
|
73°F |
8 mph
E
|
|
Sunday Night
Sep 20
|
Partly Cloudy
|
46°F |
6 mph
E
|
|
Monday
Sep 21
|
Mostly Sunny
|
76°F |
3 to 10 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Chelsea.