Dennison, MN Weather & Growing Conditions
Overnight
57°F
Slight Chance Light Rain
A slight chance of rain. Cloudy, with a low around 57. East wind around 10 mph. Chance of precipitation is 20%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Slight Chance Light Rain | 10 mph E | 23% |
| Saturday | 62°F | Chance Light Rain then Chance Drizzle | 5 to 10 mph NE | 33% |
| Saturday Night | 54°F | Mostly Cloudy | 5 to 10 mph NNE | 11% |
| Sunday | 66°F | Partly Sunny | 10 to 15 mph NE | 3% |
| Sunday Night | 47°F | Mostly Cloudy | 5 to 10 mph ENE | 2% |
| Monday | 63°F | Mostly Cloudy | 5 to 10 mph ENE | 5% |
| Monday Night | 42°F | Partly Cloudy | 5 mph ENE | 5% |
| Tuesday | 63°F | Mostly Sunny | 5 to 10 mph E | 4% |
| Tuesday Night | 41°F | Mostly Clear | 0 to 5 mph ESE | 1% |
| Wednesday | 65°F | Sunny | 0 to 5 mph ESE | 1% |
| Wednesday Night | 46°F | Mostly Clear | 0 to 5 mph SE | 5% |
| Thursday | 67°F | Mostly Sunny | 0 to 5 mph SE | 8% |
| Thursday Night | 48°F | Partly Cloudy | 0 to 5 mph SE | 4% |
| Friday | 70°F | Mostly Sunny | 0 to 5 mph SE | 4% |
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 Sep 19, 2026.