Mentor, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mentor, a city in Polk County, Minnesota.
Tonight
51°F
Mostly Cloudy
Mostly cloudy. Low around 51, with temperatures rising to around 53 overnight. East southeast wind 3 to 7 mph.
7-day forecast for Mentor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Mostly Cloudy | 3 to 7 mph ESE | 2% |
| Saturday | 70°F | Mostly Cloudy | 3 to 10 mph NE | 7% |
| Saturday Night | 49°F | Mostly Cloudy | 7 to 10 mph NE | 0% |
| Sunday | 66°F | Mostly Cloudy | 10 mph ENE | 0% |
| Sunday Night | 44°F | Mostly Cloudy | 8 mph E | 0% |
| Monday | 66°F | Mostly Sunny | 7 mph ESE | 0% |
| Monday Night | 41°F | Mostly Clear | 7 mph SE | 0% |
| Tuesday | 67°F | Sunny | 7 to 10 mph SSE | 0% |
| Tuesday Night | 45°F | Mostly Clear | 9 mph SSE | 1% |
| Wednesday | 68°F | Mostly Sunny | 10 to 14 mph SSE | 6% |
| Wednesday Night | 50°F | Mostly Cloudy then Slight Chance Rain Showers | 12 mph SSE | 15% |
| Thursday | 71°F | Slight Chance Rain Showers then Partly Sunny | 10 mph S | 15% |
| Thursday Night | 52°F | Mostly Clear | 8 mph SSE | 8% |
| Friday | 73°F | Mostly Sunny | 7 to 12 mph S | 8% |
Forecast source: National Weather Service (api.weather.gov) for Mentor (47.697, -96.144). Updated through the day.
Growing snapshot for Mentor
Last spring frost
May 9
First fall frost
Sep 30
Growing season
142 days
Hardiness zone
4a
More local growing data for Mentor: nearby ZIP 56736 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Beltrami
Climax
Crookston
Erskine
Fertile
Fisher
Fosston
Gully
McIntosh
Nielsville
Trail
Warren
Winger
Climate data from the nearest NOAA station, Red Lake Falls, Mn (12.4 mi from Mentor). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.