Roy, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Roy, a community in Fergus County, Montana.
This Afternoon
75°F
Partly Sunny
Partly sunny, with a high near 75. North wind around 10 mph.
7-day forecast for Roy
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Partly Sunny | 10 mph N | 2% |
| Tonight | 55°F | Cloudy then Chance Light Rain | 6 to 10 mph NNE | 39% |
| Saturday | 60°F | Rain Likely then Showers And Thunderstorms Likely | 7 to 10 mph NNE | 58% |
| Saturday Night | 53°F | Rain Likely | 6 to 10 mph N | 73% |
| Sunday | 64°F | Chance Light Rain | 8 mph ENE | 47% |
| Sunday Night | 50°F | Mostly Cloudy | 7 to 10 mph SE | 4% |
| Monday | 74°F | Mostly Sunny | 7 to 10 mph SSE | 0% |
| Monday Night | 53°F | Mostly Clear | 6 to 14 mph S | 0% |
| Tuesday | 78°F | Mostly Sunny | 6 mph W | 1% |
| Tuesday Night | 55°F | Partly Cloudy | 7 mph SSE | 1% |
| Wednesday | 78°F | Sunny | 7 mph WSW | 3% |
| Wednesday Night | 55°F | Mostly Clear | 8 mph S | 2% |
| Thursday | 79°F | Sunny | 5 to 9 mph S | 3% |
| Thursday Night | 56°F | Mostly Clear | 8 to 12 mph SSE | 3% |
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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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 Sep 19, 2026.