Frontenac, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Frontenac, a community in Goodhue County, Minnesota.
Overnight
58°F
Chance Rain Showers
A chance of rain showers. Cloudy, with a low around 58. East wind around 10 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Frontenac
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 58°F | Chance Rain Showers | 10 mph E | 37% |
| Saturday | 63°F | Chance Rain Showers then Chance Drizzle | 5 to 10 mph ENE | 48% |
| Saturday Night | 52°F | Slight Chance Drizzle then Cloudy | 5 mph NE | 15% |
| Sunday | 68°F | Partly Sunny | 5 to 10 mph NE | 4% |
| Sunday Night | 46°F | Mostly Cloudy | 5 to 10 mph ENE | 2% |
| Monday | 66°F | Mostly Cloudy | 5 mph ENE | 4% |
| Monday Night | 42°F | Partly Cloudy | 5 mph ENE | 4% |
| Tuesday | 65°F | Sunny | 5 mph E | 3% |
| Tuesday Night | 41°F | Mostly Clear | 0 to 5 mph E | 1% |
| Wednesday | 68°F | Sunny | 0 to 5 mph E | 1% |
| Wednesday Night | 45°F | Mostly Clear | 0 to 5 mph SE | 5% |
| Thursday | 70°F | Mostly Sunny | 0 to 5 mph SE | 7% |
| Thursday Night | 48°F | Partly Cloudy | 0 mph | 4% |
| Friday | 72°F | Mostly Sunny | 0 to 5 mph SE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Frontenac (44.504, -92.353). Updated through the day.
Growing snapshot for Frontenac
Last spring frost
Apr 23
First fall frost
Oct 14
Growing season
173 days
Hardiness zone
4b
More local growing data for Frontenac: nearby ZIP 55026 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Red Wing Dam 3, Mn (14.8 mi from Frontenac). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.