Halfmoon, MT Weather Forecast
Local 7-day forecast
Chance Light Rain then Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Halfmoon, MT in one place.
A chance of rain before noon, then showers and thunderstorms. Cloudy, with a high near 59. South southwest wind 1 to 9 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
Local Weather Overview
This forecast page for Halfmoon, 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 8, 2026 12:35 AM MDT.
The active forecast window currently covers Jun 9 to Jun 14, 2026 for Halfmoon, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 9 to Jun 14, 2026
- Latest sync
- Jun 8, 2026 12:35 AM MDT
- Forecast office
- MSO
- Source
- NOAA / NWS
Daily Outlook
This Week in Halfmoon
Sunday looks like the warmest upcoming period in Halfmoon at 73 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 41 degrees F.
The strongest winds are forecast for Wednesday at about 13 mph SW.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 8, 2026 12:35 AM MDT
- Coverage
- 6 days
- Time zone
- America/Denver
- Forecast office
- MSO
- Radar station
- KMSX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Rain. Mostly cloudy, with a low around 41. South southwest wind around 12 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
Rain likely. Mostly cloudy, with a high near 55. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
A chance of rain before midnight. Mostly cloudy, with a low around 41.
A chance of rain after noon. Partly sunny, with a high near 65.
A slight chance of rain before midnight. Partly cloudy, with a low around 42.
A chance of rain. Mostly sunny, with a high near 68.
A slight chance of rain before midnight. Partly cloudy, with a low around 45.
A slight chance of rain after noon. Mostly sunny, with a high near 70.
A slight chance of rain. Partly cloudy, with a low around 45.
Mostly sunny, with a high near 73.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Jun 9
|
Chance Light Rain then Showers And Thunderstorms
|
59°F |
1 to 9 mph
SSW
|
|
Tuesday Night
Jun 9
|
Light Rain
|
41°F |
12 mph
SSW
|
|
Wednesday
Jun 10
|
Light Rain Likely
|
55°F |
13 mph
SW
|
|
Wednesday Night
Jun 10
|
Chance Light Rain then Mostly Cloudy
|
41°F |
2 to 12 mph
SSW
|
|
Thursday
Jun 11
|
Partly Sunny then Chance Light Rain
|
65°F |
1 to 8 mph
SSW
|
|
Thursday Night
Jun 11
|
Slight Chance Light Rain then Partly Cloudy
|
42°F |
0 to 8 mph
WNW
|
|
Friday
Jun 12
|
Chance Light Rain
|
68°F |
0 to 5 mph
W
|
|
Friday Night
Jun 12
|
Slight Chance Light Rain then Partly Cloudy
|
45°F |
1 to 5 mph
N
|
|
Saturday
Jun 13
|
Mostly Sunny then Slight Chance Light Rain
|
70°F |
3 mph
NE
|
|
Saturday Night
Jun 13
|
Slight Chance Light Rain
|
45°F |
5 mph
NE
|
|
Sunday
Jun 14
|
Mostly Sunny
|
73°F |
1 to 5 mph
ENE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Halfmoon.