Cyr, MT Weather & Growing Conditions
Today
72°F
Patchy Smoke
Patchy smoke. Sunny, with a high near 72. East northeast wind 0 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Patchy Smoke | 0 to 6 mph ENE | 0% |
| Tonight | 52°F | Patchy Smoke | 2 to 6 mph SE | 0% |
| Wednesday | 77°F | Sunny then Patchy Smoke | 1 to 5 mph WSW | 0% |
| Wednesday Night | 54°F | Mostly Clear | 3 mph WSW | 0% |
| Thursday | 83°F | Sunny | 2 to 6 mph SW | 0% |
| Thursday Night | 59°F | Mostly Clear | 3 to 8 mph WSW | 0% |
| Friday | 83°F | Sunny | 2 to 10 mph WSW | 0% |
| Friday Night | 58°F | Mostly Clear | 5 to 12 mph WSW | 0% |
| Saturday | 80°F | Sunny | 3 to 10 mph WSW | 0% |
| Saturday Night | 58°F | Mostly Clear | 3 to 10 mph WSW | 0% |
| Sunday | 78°F | Sunny | 1 to 7 mph WSW | 0% |
| Sunday Night | 56°F | Mostly Clear | 2 to 8 mph WSW | 0% |
| Monday | 79°F | Sunny | 1 to 6 mph WNW | 0% |
| Monday Night | 56°F | Mostly Clear | 2 to 8 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Cyr, MT
Last spring frost
May 18
First fall frost
Sep 25
Growing season
126 days
Hardiness zone
5b
Explore more for Cyr, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Alberton, Mt (9.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.