Frontenac, MN Weather & Growing Conditions
Today
78°F
Showers And Thunderstorms Likely then Patchy Smoke
Showers and thunderstorms likely before 10am, then patchy smoke. Mostly cloudy, with a high near 78. West northwest wind 5 to 10 mph. Chance of precipitation is 60%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Showers And Thunderstorms Likely then Patchy Smoke | 5 to 10 mph WNW | 55% |
| Tonight | 58°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 to 10 mph WNW | 16% |
| Wednesday | 78°F | Sunny | 0 to 5 mph NW | 1% |
| Wednesday Night | 59°F | Mostly Clear | 5 mph WSW | 0% |
| Thursday | 84°F | Sunny | 5 to 10 mph SSW | 0% |
| Thursday Night | 64°F | Mostly Clear | 5 to 10 mph SSW | 1% |
| Friday | 86°F | Sunny | 5 to 10 mph SSW | 11% |
| Friday Night | 66°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 24% |
| Saturday | 86°F | Sunny | 5 mph SSW | 14% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 5 mph W | 42% |
| Sunday | 86°F | Chance Showers And Thunderstorms | 5 mph SW | 42% |
| Sunday Night | 66°F | Slight Chance Showers And Thunderstorms | 5 mph NE | 24% |
| Monday | 85°F | Chance Showers And Thunderstorms | 5 mph ENE | 26% |
| Monday Night | 66°F | Slight Chance Showers And Thunderstorms | 5 mph NNE | 24% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Frontenac, MN
Last spring frost
Apr 23
First fall frost
Oct 14
Growing season
173 days
Hardiness zone
4b
Explore more for Frontenac, MN: full frost dates · planting calendar · Minnesota frost dates
Climate data from the nearest NOAA station, Red Wing Dam 3, Mn (14.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.