Hays, MT Weather & Growing Conditions
Overnight
51°F
Cloudy
Cloudy, with a low around 51. Northeast wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 51°F | Cloudy | 7 mph NE | 1% |
| Saturday | 67°F | Mostly Cloudy | 7 to 10 mph NE | 4% |
| Saturday Night | 50°F | Mostly Cloudy then Chance Light Rain | 3 to 8 mph ENE | 29% |
| Sunday | 66°F | Slight Chance Light Rain then Partly Sunny | 3 to 7 mph ESE | 17% |
| Sunday Night | 50°F | Partly Cloudy | 8 mph SSE | 3% |
| Monday | 72°F | Mostly Sunny | 6 to 10 mph SSE | 0% |
| Monday Night | 52°F | Mostly Clear | 7 to 14 mph SSE | 0% |
| Tuesday | 78°F | Sunny | 5 mph SW | 0% |
| Tuesday Night | 55°F | Mostly Clear | 5 mph S | 1% |
| Wednesday | 80°F | Sunny | 2 to 7 mph SSW | 1% |
| Wednesday Night | 56°F | Mostly Clear | 7 mph SSE | 2% |
| Thursday | 80°F | Sunny | 3 to 7 mph S | 3% |
| Thursday Night | 56°F | Mostly Clear | 9 mph SE | 5% |
| Friday | 78°F | Mostly Sunny | 7 to 12 mph SSE | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Hays, MT
Last spring frost
May 23
First fall frost
Sep 23
Growing season
121 days
Hardiness zone
4b
Explore more for Hays, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Chinook 35Se, Mt (13.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.