Owosso, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Owosso, a city in Shiawassee County, Michigan.
Overnight
52°F
Chance Light Rain
A chance of rain. Mostly cloudy. Low around 52, with temperatures rising to around 55 overnight. East northeast wind around 6 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Owosso
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Chance Light Rain | 6 mph ENE | 40% |
| Saturday | 65°F | Showers And Thunderstorms | 5 to 8 mph ESE | 82% |
| Saturday Night | 55°F | Showers And Thunderstorms | 5 to 8 mph E | 80% |
| Sunday | 67°F | Chance Rain Showers | 7 to 13 mph NE | 46% |
| Sunday Night | 49°F | Chance Rain Showers then Mostly Cloudy | 8 to 13 mph NE | 42% |
| Monday | 63°F | Mostly Cloudy | 13 mph NE | 8% |
| Monday Night | 46°F | Mostly Cloudy | 8 to 14 mph NE | 8% |
| Tuesday | 62°F | Partly Sunny | 10 to 14 mph NE | 11% |
| Tuesday Night | 48°F | Chance Rain Showers | 8 to 13 mph ENE | 38% |
| Wednesday | 62°F | Chance Rain Showers | 12 mph ENE | 41% |
| Wednesday Night | 49°F | Chance Rain Showers then Mostly Cloudy | 5 to 9 mph NE | 29% |
| Thursday | 66°F | Partly Sunny | 6 to 9 mph NNE | 8% |
| Thursday Night | 49°F | Mostly Cloudy | 2 to 8 mph NNE | 7% |
| Friday | 69°F | Mostly Sunny | 3 to 8 mph NNE | 6% |
Forecast source: National Weather Service (api.weather.gov) for Owosso (42.995, -84.176). Updated through the day.
Growing snapshot for Owosso
Last spring frost
May 1
First fall frost
Oct 15
Growing season
164 days
Hardiness zone
6a
More local growing data for Owosso: nearby ZIP 48867 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Bancroft
Byron
Corunna
Durand
Henderson
Laingsburg
Lake Victoria
Lennon
Middletown
Morrice
New Lothrop
Perry
Shaftsburg
Vernon
Climate data from the nearest NOAA station, Owosso Wwtp, Mi (0.8 mi from Owosso). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.