South Haven, MI Weather & Growing Conditions
Tonight
51°F
Showers And Thunderstorms Likely
A chance of rain showers before 5am, then showers and thunderstorms likely. Mostly cloudy. Low around 51, with temperatures rising to around 56 overnight. East wind 6 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Showers And Thunderstorms Likely | 6 to 9 mph E | 73% |
| Saturday | 72°F | Showers And Thunderstorms | 7 to 13 mph ESE | 98% |
| Saturday Night | 55°F | Showers And Thunderstorms | 3 to 7 mph ENE | 91% |
| Sunday | 70°F | Rain Showers Likely | 6 to 13 mph NE | 67% |
| Sunday Night | 47°F | Chance Rain Showers | 8 to 12 mph ENE | 43% |
| Monday | 66°F | Chance Rain Showers | 13 mph ENE | 30% |
| Monday Night | 46°F | Chance Rain Showers then Mostly Cloudy | 8 to 13 mph ENE | 30% |
| Tuesday | 65°F | Partly Sunny then Slight Chance Rain Showers | 9 to 13 mph ENE | 19% |
| Tuesday Night | 47°F | Slight Chance Rain Showers | 6 to 12 mph ENE | 19% |
| Wednesday | 66°F | Slight Chance Rain Showers then Partly Sunny | 7 to 10 mph NE | 17% |
| Wednesday Night | 48°F | Mostly Cloudy | 3 to 8 mph NE | 9% |
| Thursday | 69°F | Partly Sunny | 5 to 8 mph NNE | 4% |
| Thursday Night | 49°F | Mostly Cloudy | 2 to 7 mph NNE | 5% |
| Friday | 71°F | Mostly Sunny | 2 to 7 mph NNE | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for South Haven, MI
Last spring frost
Apr 17
First fall frost
Nov 5
Growing season
201 days
Hardiness zone
6b
Explore more for South Haven, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, S Haven, Mi (3.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.