St. Joseph, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Joseph, a city in Berrien County, Michigan.
Tonight
55°F
Chance Showers And Thunderstorms
A slight chance of rain showers before 7pm, then a chance of showers and thunderstorms between 2am and 5am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 55. East wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for St. Joseph
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Chance Showers And Thunderstorms | 5 to 10 mph E | 50% |
| Saturday | 74°F | Showers And Thunderstorms | 10 mph SE | 89% |
| Saturday Night | 59°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 mph E | 83% |
| Sunday | 70°F | Showers And Thunderstorms | 5 to 15 mph NE | 77% |
| Sunday Night | 52°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 54% |
| Monday | 66°F | Chance Rain Showers | 10 to 15 mph NE | 41% |
| Monday Night | 50°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 35% |
| Tuesday | 66°F | Partly Sunny then Slight Chance Rain Showers | 10 to 15 mph NE | 21% |
| Tuesday Night | 51°F | Slight Chance Rain Showers | 10 to 15 mph NE | 21% |
| Wednesday | 67°F | Slight Chance Rain Showers then Partly Sunny | 10 mph NE | 15% |
| Wednesday Night | 52°F | Mostly Cloudy | 5 to 10 mph NE | 8% |
| Thursday | 68°F | Partly Sunny | 5 to 10 mph N | 3% |
| Thursday Night | 52°F | Partly Cloudy | 5 to 10 mph NE | 4% |
| Friday | 70°F | Mostly Sunny | 5 to 10 mph N | 6% |
Forecast source: National Weather Service (api.weather.gov) for St. Joseph (42.100, -86.489). Updated through the day.
Growing snapshot for St. Joseph
Last spring frost
May 5
First fall frost
Oct 15
Growing season
161 days
Hardiness zone
6b
More local growing data for St. Joseph: nearby ZIP 49085 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Baroda
Benton Harbor
Benton Heights
Berrien Springs
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Coloma
Eau Claire
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Galien
Grand Beach
Lake Michigan Beach
Michiana
Millburg
New Buffalo
New Troy
Niles
Paw Paw Lake
Shoreham
Shorewood-Tower Hills-Harbert
Stevensville
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Watervliet
Climate data from the nearest NOAA station, Benton Harbor Ap, Mi (5.2 mi from St. Joseph). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.