Roy, MT Weather & Growing Conditions
Today
77°F
Sunny
Sunny, with a high near 77. West northwest wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 77°F | Sunny | 7 mph WNW | 0% |
| Tonight | 53°F | Partly Cloudy | 5 to 8 mph W | 1% |
| Wednesday | 87°F | Mostly Sunny | 3 to 12 mph WNW | 0% |
| Wednesday Night | 58°F | Mostly Clear | 5 to 10 mph W | 0% |
| Thursday | 93°F | Sunny | 3 to 13 mph WNW | 0% |
| Thursday Night | 61°F | Mostly Clear | 5 to 13 mph ESE | 0% |
| Friday | 98°F | Sunny | 5 to 13 mph E | 0% |
| Friday Night | 63°F | Mostly Clear | 7 to 12 mph NW | 0% |
| Saturday | 94°F | Sunny | 10 to 16 mph NW | 0% |
| Saturday Night | 64°F | Mostly Clear | 6 to 10 mph ENE | 0% |
| Sunday | 92°F | Mostly Sunny | 8 to 13 mph NNW | 1% |
| Sunday Night | 63°F | Partly Cloudy | 6 to 13 mph NE | 10% |
| Monday | 89°F | Mostly Sunny | 6 to 12 mph ENE | 11% |
| Monday Night | 63°F | Partly Cloudy then Chance Rain Showers | 6 to 13 mph E | 28% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Roy, MT
Last spring frost
May 14
First fall frost
Sep 24
Growing season
134 days
Hardiness zone
4b
Explore more for Roy, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Roy 8 Ne, Mt (5.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.