Mentor, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mentor, a city in Polk County, Minnesota.
Overnight
51°F
Mostly Clear
Mostly clear. Low around 51, with temperatures rising to around 53 overnight. West northwest wind around 8 mph.
7-day forecast for Mentor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 51°F | Mostly Clear | 8 mph WNW | 0% |
| Tuesday | 72°F | Sunny | 8 to 13 mph W | 1% |
| Tuesday Night | 50°F | Mostly Clear | 2 to 13 mph SW | 0% |
| Wednesday | 79°F | Sunny | 5 to 12 mph SW | 0% |
| Wednesday Night | 58°F | Partly Cloudy then Slight Chance Rain Showers | 10 mph SW | 15% |
| Thursday | 82°F | Slight Chance Rain Showers then Sunny | 8 to 12 mph WSW | 15% |
| Thursday Night | 59°F | Mostly Clear | 5 to 10 mph S | 6% |
| Friday | 81°F | Sunny | 6 to 12 mph W | 5% |
| Friday Night | 55°F | Mostly Clear | 3 to 10 mph NNE | 7% |
| Saturday | 79°F | Mostly Sunny | 3 to 9 mph NE | 8% |
| Saturday Night | 57°F | Slight Chance Showers And Thunderstorms | 5 to 9 mph NE | 18% |
| Sunday | 78°F | Slight Chance Rain Showers then Mostly Sunny | 5 to 9 mph N | 16% |
| Sunday Night | 57°F | Partly Cloudy then Slight Chance Rain Showers | 5 to 9 mph NNE | 20% |
| Monday | 77°F | Slight Chance Rain Showers then Partly Sunny | 5 to 9 mph NNE | 20% |
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 Aug 4, 2026.