Hays, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hays, a community in Blaine County, Montana.
Overnight
42°F
Mostly Clear
Mostly clear, with a low around 42. Southwest wind around 6 mph.
7-day forecast for Hays
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 42°F | Mostly Clear | 6 mph SW | 0% |
| Tuesday | 71°F | Sunny | 6 to 10 mph WNW | 1% |
| Tuesday Night | 53°F | Mostly Clear | 3 to 9 mph SSW | 2% |
| Wednesday | 80°F | Partly Sunny | 7 to 13 mph WSW | 0% |
| Wednesday Night | 57°F | Partly Cloudy | 3 to 12 mph W | 0% |
| Thursday | 85°F | Sunny | 6 to 13 mph W | 0% |
| Thursday Night | 60°F | Mostly Clear | 5 to 13 mph NE | 0% |
| Friday | 89°F | Sunny | 3 to 14 mph SSE | 0% |
| Friday Night | 63°F | Mostly Clear | 10 mph E | 0% |
| Saturday | 86°F | Sunny | 8 to 12 mph WNW | 0% |
| Saturday Night | 62°F | Partly Cloudy | 10 mph NE | 1% |
| Sunday | 84°F | Mostly Sunny | 7 to 12 mph NNE | 2% |
| Sunday Night | 60°F | Partly Cloudy | 8 to 12 mph NE | 12% |
| Monday | 81°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 6 to 10 mph ENE | 20% |
Forecast source: National Weather Service (api.weather.gov) for Hays (48.010, -108.661). Updated through the day.
Growing snapshot for Hays
Last spring frost
May 23
First fall frost
Sep 23
Growing season
121 days
Hardiness zone
4b
More local growing data for Hays: nearby ZIP 59527 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Chinook 35Se, Mt (13.4 mi from Hays). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.