Weather WorldIsmay, MT Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Ismay Weather Forecast
| REST OF TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY |
 |  |  |  |  |  | | | | | | |
| Patchy Fog | Rain Showers | Mostly Clear | Mostly Sunny | Chance of T-Storm | Chance of T-Storm | Mostly Clear | Sunny | Mostly Clear | Sunny | Mostly Clear | Mostly Sunny |
| Lo: 50°FLo: 10°C | Hi: 69°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 75°FHi: 24°C | Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C | Lo: 50°FLo: 10°C | Hi: 85°FHi: 29°C | Lo: 59°FLo: 15°C | Hi: 85°FHi: 29°C | Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C |
| POP: 20% | POP: 20% | POP: 50% |
POP = Probability of Precipitation.
Weather Outlook Updated: 1038 PM MDT Sun Sep 20 2026 
Ismay Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Ismay Weather Map
Ismay Quick Facts
Ismay Forecast Discussion
Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 1235 AM MDT Mon Sep 21 2026
Key Messages
- Areas of fog through the morning commute.
- Warmer and drier for the work week. 80s return midweek.
- Scattered showers and storms late Tuesday into Wednesday.
Discussion
... Next 7 Days...
As the slow moving upper level low finally makes its exit to our east, we will see clearing skies and temps return to average. While the next system to impact the region will zip through Tuesday and Wednesday, the next large weather maker could impact us this weekend, however a lot of uncertainty remains...