Buchanan, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Buchanan, a city in Berrien County, Michigan.
Tonight
63°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy, with a low around 63. South wind 0 to 5 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
7-day forecast for Buchanan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 63°F | Showers And Thunderstorms | 0 to 5 mph S | 90% |
| Sunday | 71°F | Showers And Thunderstorms | 5 to 10 mph N | 82% |
| Sunday Night | 50°F | Chance Rain Showers | 10 mph NE | 36% |
| Monday | 66°F | Chance Rain Showers | 10 to 15 mph NE | 29% |
| Monday Night | 48°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 18% |
| Tuesday | 64°F | Mostly Cloudy then Slight Chance Rain Showers | 10 to 15 mph NE | 15% |
| Tuesday Night | 49°F | Slight Chance Rain Showers | 10 to 15 mph NE | 16% |
| Wednesday | 65°F | Slight Chance Rain Showers | 10 mph NE | 21% |
| Wednesday Night | 50°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 21% |
| Thursday | 68°F | Partly Sunny | 5 to 10 mph NE | 3% |
| Thursday Night | 51°F | Mostly Cloudy | 0 to 10 mph NE | 4% |
| Friday | 72°F | Partly Sunny | 0 to 5 mph NE | 4% |
| Friday Night | 50°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Saturday | 73°F | Sunny | 0 to 5 mph NE | 2% |
Forecast source: National Weather Service (api.weather.gov) for Buchanan (41.828, -86.366). Updated through the day.
Growing snapshot for Buchanan
Last spring frost
Apr 27
First fall frost
Oct 25
Growing season
180 days
Hardiness zone
6a
More local growing data for Buchanan: nearby ZIP 49107 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Baroda
Benton Harbor
Benton Heights
Berrien Springs
Bridgman
Coloma
Eau Claire
Fair Plain
Galien
Grand Beach
Lake Michigan Beach
Michiana
Millburg
New Buffalo
New Troy
Niles
Paw Paw Lake
Shoreham
Shorewood-Tower Hills-Harbert
St. Joseph
Stevensville
Three Oaks
Watervliet
Climate data from the nearest NOAA station, Niles, Mi (7.8 mi from Buchanan). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.