Ismay, MT Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Ismay, MT in one place.
Mostly sunny, with a high near 71. West southwest wind around 7 mph.
Local Weather Overview
This forecast page for Ismay, 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: Apr 14, 2026 9:27 AM MDT.
The active forecast window currently covers Apr 15 to Apr 20, 2026 for Ismay, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 15 to Apr 20, 2026
- Latest sync
- Apr 14, 2026 9:27 AM MDT
- Forecast office
- BYZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Ismay
Monday looks like the warmest upcoming period in Ismay at 73 degrees F.
Friday Night is the coolest period ahead with temperatures near 20 degrees F.
The strongest winds are forecast for Thursday Night at about 12 to 18 mph NNW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 14, 2026 9:27 AM MDT
- Coverage
- 7 days
- Time zone
- America/Denver
- Forecast office
- BYZ
- Radar station
- KGGW
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly cloudy. Low around 42, with temperatures rising to around 44 overnight. Southeast wind 7 to 10 mph.
A chance of rain showers after noon. Partly sunny. High near 57, with temperatures falling to around 52 in the afternoon. West northwest wind 7 to 16 mph. Chance of precipitation is 30%.
A chance of rain and snow showers. Mostly cloudy. Low around 24, with temperatures rising to around 26 overnight. North northwest wind 12 to 18 mph. Chance of precipitation is 40%. New snow accumulation of less than one inch possible.
A slight chance of snow showers before noon. Mostly cloudy, with a high near 40. Northwest wind 12 to 16 mph. Chance of precipitation is 20%.
Partly cloudy, with a low around 20. Northwest wind 6 to 15 mph.
Mostly sunny, with a high near 48. West northwest wind 6 to 13 mph.
Mostly clear, with a low around 26. West southwest wind 5 to 10 mph.
Sunny, with a high near 63. South wind around 8 mph.
Mostly clear, with a low around 36. South southeast wind around 10 mph.
Sunny, with a high near 73. South wind 8 to 13 mph.
Partly cloudy, with a low around 44. South southeast wind around 12 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Apr 15
|
Mostly Sunny
|
71°F |
7 mph
WSW
|
|
Wednesday Night
Apr 15
|
Mostly Cloudy
|
42°F |
7 to 10 mph
SE
|
|
Thursday
Apr 16
|
Partly Sunny then Chance Rain Showers
|
57°F |
7 to 16 mph
WNW
|
|
Thursday Night
Apr 16
|
Chance Rain And Snow Showers
|
24°F |
12 to 18 mph
NNW
|
|
Friday
Apr 17
|
Slight Chance Snow Showers then Mostly Cloudy
|
40°F |
12 to 16 mph
NW
|
|
Friday Night
Apr 17
|
Partly Cloudy
|
20°F |
6 to 15 mph
NW
|
|
Saturday
Apr 18
|
Mostly Sunny
|
48°F |
6 to 13 mph
WNW
|
|
Saturday Night
Apr 18
|
Mostly Clear
|
26°F |
5 to 10 mph
WSW
|
|
Sunday
Apr 19
|
Sunny
|
63°F |
8 mph
S
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
36°F |
10 mph
SSE
|
|
Monday
Apr 20
|
Sunny
|
73°F |
8 to 13 mph
S
|
|
Monday Night
Apr 20
|
Partly Cloudy
|
44°F |
12 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Ismay.