Roy, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Roy, a community in Fergus County, Montana.
Today
75°F
Sunny
Sunny, with a high near 75. Northwest wind around 8 mph.
7-day forecast for Roy
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Sunny | 8 mph NW | 0% |
| Tonight | 53°F | Partly Cloudy | 6 to 9 mph WNW | 1% |
| Wednesday | 84°F | Mostly Sunny | 5 to 13 mph WNW | 0% |
| Wednesday Night | 58°F | Mostly Clear | 6 to 12 mph W | 0% |
| Thursday | 90°F | Sunny | 5 to 13 mph W | 0% |
| Thursday Night | 62°F | Mostly Clear | 7 to 14 mph NNW | 0% |
| Friday | 95°F | Sunny | 7 to 14 mph ENE | 0% |
| Friday Night | 64°F | Mostly Clear | 8 to 13 mph WNW | 0% |
| Saturday | 91°F | Sunny | 14 to 18 mph WNW | 0% |
| Saturday Night | 64°F | Mostly Clear | 8 to 12 mph E | 0% |
| Sunday | 89°F | Mostly Sunny | 10 to 15 mph NW | 1% |
| Sunday Night | 63°F | Partly Cloudy | 7 to 14 mph ENE | 9% |
| Monday | 86°F | Mostly Sunny | 7 to 13 mph ENE | 13% |
| Monday Night | 62°F | Partly Cloudy then Chance Rain Showers | 7 to 14 mph E | 27% |
Forecast source: National Weather Service (api.weather.gov) for Roy (47.334, -108.960). Updated through the day.
Growing snapshot for Roy
Last spring frost
May 14
First fall frost
Sep 24
Growing season
134 days
Hardiness zone
4b
More local growing data for Roy: nearby ZIP 59471 weather · frost dates · planting calendar · Montana frost dates
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Moore
Warm Spring Creek
Winifred
Climate data from the nearest NOAA station, Roy 8 Ne, Mt (5.2 mi from Roy). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.