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. High near 54, with temperatures falling to around 50 in the afternoon. West wind 2 to 8 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: Oct 13, 2026 12:43 PM MDT.
The active forecast window currently covers Oct 13 to Oct 19, 2026 for Ismay, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 13 to Oct 19, 2026
- Latest sync
- Oct 13, 2026 12:43 PM MDT
- Forecast office
- BYZ
- Source
- NOAA / NWS
Daily Outlook
This Week in Ismay
Saturday looks like the warmest upcoming period in Ismay at 75 degrees F.
Thursday Night is the coolest period ahead with temperatures near 30 degrees F.
The strongest winds are forecast for Thursday at about 9 to 20 mph NW.
The forecast from Oct 13 through Oct 19 stays mostly dry.
Forecast Details
- Last updated
- Oct 13, 2026 12:43 PM MDT
- Coverage
- 8 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
Areas of fog after midnight. Mostly clear. Low around 31, with temperatures rising to around 33 overnight. West northwest wind around 6 mph.
Patchy fog before 9am. Mostly sunny, with a high near 59. South southwest wind around 5 mph.
Partly cloudy, with a low around 38. Southwest wind 2 to 6 mph.
Sunny. High near 60, with temperatures falling to around 57 in the afternoon. Northwest wind 9 to 20 mph.
Mostly clear, with a low around 30. West northwest wind 2 to 10 mph.
Sunny. High near 68, with temperatures falling to around 65 in the afternoon. South wind 6 to 14 mph.
Mostly clear, with a low around 42. South wind 7 to 13 mph.
Sunny. High near 75, with temperatures falling to around 70 in the afternoon. Southwest wind 6 to 12 mph.
Mostly clear, with a low around 45. West southwest wind 2 to 6 mph.
Sunny. High near 70, with temperatures falling to around 67 in the afternoon. Northwest wind 2 to 6 mph.
Mostly clear, with a low around 44. East wind around 5 mph.
Sunny. High near 75, with temperatures falling to around 72 in the afternoon. South southeast wind 6 to 10 mph.
Mostly clear, with a low around 46. South southeast wind around 7 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Oct 13
|
Mostly Sunny
|
54°F |
2 to 8 mph
W
|
|
Tonight
Oct 13
|
Mostly Clear then Areas Of Fog
|
31°F |
6 mph
WNW
|
|
Wednesday
Oct 14
|
Patchy Fog then Mostly Sunny
|
59°F |
5 mph
SSW
|
|
Wednesday Night
Oct 14
|
Partly Cloudy
|
38°F |
2 to 6 mph
SW
|
|
Thursday
Oct 15
|
Sunny
|
60°F |
9 to 20 mph
NW
|
|
Thursday Night
Oct 15
|
Mostly Clear
|
30°F |
2 to 10 mph
WNW
|
|
Friday
Oct 16
|
Sunny
|
68°F |
6 to 14 mph
S
|
|
Friday Night
Oct 16
|
Mostly Clear
|
42°F |
7 to 13 mph
S
|
|
Saturday
Oct 17
|
Sunny
|
75°F |
6 to 12 mph
SW
|
|
Saturday Night
Oct 17
|
Mostly Clear
|
45°F |
2 to 6 mph
WSW
|
|
Sunday
Oct 18
|
Sunny
|
70°F |
2 to 6 mph
NW
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
44°F |
5 mph
E
|
|
Monday
Oct 19
|
Sunny
|
75°F |
6 to 10 mph
SSE
|
|
Monday Night
Oct 19
|
Mostly Clear
|
46°F |
7 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Ismay.