Roy Lake, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Roy Lake, a community in Mahnomen County, Minnesota.
Tonight
40°F
Patchy Fog then Light Rain Likely
Patchy fog and a slight chance of rain before 7pm, then rain likely and patchy fog. Cloudy. Low around 40, with temperatures rising to around 44 overnight. North wind 13 to 16 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Roy Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 40°F | Patchy Fog then Light Rain Likely | 13 to 16 mph N | 65% |
| Wednesday | 46°F | Light Rain Likely | 16 mph N | 72% |
| Wednesday Night | 33°F | Mostly Cloudy | 13 to 16 mph N | 9% |
| Thursday | 40°F | Mostly Cloudy | 7 to 13 mph N | 0% |
| Thursday Night | 25°F | Partly Cloudy | 2 to 6 mph E | 0% |
| Friday | 42°F | Mostly Sunny | 5 mph S | 0% |
| Friday Night | 28°F | Partly Cloudy | 5 to 8 mph SSW | 0% |
| Saturday | 50°F | Mostly Sunny | 10 mph SW | 8% |
| Saturday Night | 33°F | Slight Chance Light Rain then Partly Cloudy | 9 mph W | 15% |
| Sunday | 51°F | Mostly Sunny | 9 mph WSW | 6% |
| Sunday Night | 36°F | Partly Cloudy | 7 to 10 mph SSW | 2% |
| Monday | 53°F | Mostly Sunny | 10 to 16 mph WSW | 1% |
| Monday Night | 33°F | Mostly Clear | 6 to 10 mph W | 0% |
| Tuesday | 48°F | Mostly Sunny | 8 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Roy Lake (47.317, -95.539). Updated through the day.
Growing snapshot for Roy Lake
Last spring frost
May 7
First fall frost
Sep 28
Growing season
143 days
Hardiness zone
3b
More local growing data for Roy Lake: nearby ZIP 56566 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Beaulieu
Bejou
Ebro
Elbow Lake
Lengby
Mahnomen
Midway
Naytahwaush
Pine Bend
Riverland
The Ranch
Twin Lakes
West Roy Lake
Climate data from the nearest NOAA station, Mahnomen, Mn (17.8 mi from Roy Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.