South Haven, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for South Haven, a city in Stearns County, Minnesota.
Overnight
48°F
Light Rain
Rain before 5am, then rain and patchy fog. Cloudy, with a low around 48. North northwest wind around 10 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for South Haven
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Light Rain | 10 mph NNW | 94% |
| Wednesday | 51°F | Light Rain | 10 to 15 mph NNW | 95% |
| Wednesday Night | 41°F | Light Rain then Chance Drizzle | 10 to 15 mph NNW | 85% |
| Thursday | 46°F | Mostly Cloudy | 10 to 15 mph N | 8% |
| Thursday Night | 30°F | Mostly Cloudy | 0 to 5 mph NNE | 0% |
| Friday | 43°F | Sunny | 0 mph | 0% |
| Friday Night | 28°F | Mostly Clear | 0 mph | 0% |
| Saturday | 48°F | Mostly Sunny | 0 to 5 mph SW | 2% |
| Saturday Night | 36°F | Mostly Clear | 5 mph W | 2% |
| Sunday | 52°F | Sunny | 5 mph W | 1% |
| Sunday Night | 36°F | Mostly Clear | 0 to 5 mph SW | 0% |
| Monday | 57°F | Mostly Sunny | 5 to 10 mph WSW | 0% |
| Monday Night | 37°F | Mostly Clear | 0 to 5 mph WNW | 0% |
| Tuesday | 52°F | Mostly Sunny | 0 to 5 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov) for South Haven (45.293, -94.217). Updated through the day.
Growing snapshot for South Haven
Last spring frost
May 2
First fall frost
Oct 5
Growing season
156 days
Hardiness zone
4b
More local growing data for South Haven: nearby ZIP 55382 weather · frost dates · planting calendar · Minnesota frost dates
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Climate data from the nearest NOAA station, Kimball 3N, Mn (6.3 mi from South Haven). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.