Dennison, MN Weather & Growing Conditions
Today
74°F
Partly Sunny then Patchy Smoke
Patchy smoke between noon and 4pm. Partly sunny, with a high near 74. West northwest wind around 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Partly Sunny then Patchy Smoke | 10 mph WNW | 14% |
| Tonight | 54°F | Mostly Cloudy | 0 to 10 mph W | 11% |
| Wednesday | 76°F | Sunny | 0 to 5 mph WNW | 1% |
| Wednesday Night | 55°F | Mostly Clear | 5 mph SW | 0% |
| Thursday | 78°F | Sunny | 5 to 10 mph SSW | 0% |
| Thursday Night | 62°F | Mostly Clear | 10 mph SSW | 4% |
| Friday | 81°F | Sunny | 10 to 15 mph SSW | 10% |
| Friday Night | 64°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 18% |
| Saturday | 82°F | Sunny | 5 to 10 mph S | 13% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 47% |
| Sunday | 82°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 47% |
| Sunday Night | 64°F | Partly Cloudy then Chance Showers And Thunderstorms | 5 mph NE | 26% |
| Monday | 81°F | Chance Showers And Thunderstorms | 5 to 10 mph ENE | 26% |
| Monday Night | 64°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph NE | 22% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Dennison, MN
Last spring frost
May 5
First fall frost
Oct 5
Growing season
152 days
Hardiness zone
4b
Explore more for Dennison, MN: full frost dates · planting calendar · Minnesota frost dates
Climate data from the nearest NOAA station, Faribault, Mn (15.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.