Owosso, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Owosso, a city in Shiawassee County, Michigan.
This Afternoon
75°F
Mostly Sunny
Mostly sunny. High near 75, with temperatures falling to around 73 in the afternoon. South wind around 14 mph, with gusts as high as 25 mph.
7-day forecast for Owosso
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Mostly Sunny | 14 mph S | 2% |
| Tonight | 62°F | Partly Cloudy | 13 mph S | 5% |
| Wednesday | 71°F | Light Rain | 13 to 16 mph S | 88% |
| Wednesday Night | 51°F | Chance Light Rain then Mostly Cloudy | 8 to 12 mph SSW | 54% |
| Thursday | 60°F | Mostly Cloudy then Slight Chance Light Rain | 10 to 14 mph SW | 22% |
| Thursday Night | 44°F | Chance Light Rain | 5 to 8 mph W | 49% |
| Friday | 53°F | Chance Light Rain | 5 to 10 mph NW | 51% |
| Friday Night | 36°F | Chance Light Rain | 6 to 9 mph NNW | 45% |
| Saturday | 51°F | Slight Chance Light Rain then Partly Sunny | 8 mph NW | 15% |
| Saturday Night | 32°F | Partly Cloudy | 5 mph WSW | 4% |
| Sunday | 55°F | Mostly Sunny then Slight Chance Light Rain | 5 to 12 mph W | 16% |
| Sunday Night | 34°F | Slight Chance Light Rain then Partly Cloudy | 6 to 9 mph WNW | 16% |
| Monday | 58°F | Mostly Sunny | 6 to 12 mph W | 9% |
| Monday Night | 39°F | Partly Cloudy | 9 mph WSW | 9% |
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
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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 Nov 4, 2026.