Hays, MT Weather & Growing Conditions
Today
76°F
Sunny
Sunny, with a high near 76. West wind 5 to 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Sunny | 5 to 8 mph W | 1% |
| Tonight | 53°F | Mostly Clear | 2 to 7 mph W | 1% |
| Wednesday | 84°F | Mostly Sunny | 3 to 10 mph W | 0% |
| Wednesday Night | 57°F | Mostly Clear | 2 to 8 mph NW | 0% |
| Thursday | 91°F | Sunny | 2 to 12 mph W | 0% |
| Thursday Night | 60°F | Mostly Clear | 5 to 10 mph N | 0% |
| Friday | 94°F | Sunny | 5 to 12 mph SE | 0% |
| Friday Night | 63°F | Mostly Clear | 6 to 9 mph N | 0% |
| Saturday | 91°F | Sunny | 7 to 10 mph WNW | 0% |
| Saturday Night | 63°F | Partly Cloudy | 5 to 8 mph NNE | 1% |
| Sunday | 89°F | Mostly Sunny | 6 to 9 mph N | 2% |
| Sunday Night | 62°F | Partly Cloudy | 10 mph NE | 9% |
| Monday | 86°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 6 to 9 mph E | 15% |
| Monday Night | 61°F | Chance Showers And Thunderstorms | 7 to 10 mph ENE | 26% |
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 (19.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.