Tecumseh, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Tecumseh, a city in Lenawee County, Michigan.
Today
84°F
Sunny
Sunny, with a high near 84. South southwest wind 2 to 6 mph.
7-day forecast for Tecumseh
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Sunny | 2 to 6 mph SSW | 0% |
| Tonight | 57°F | Mostly Clear | 0 to 6 mph S | 0% |
| Wednesday | 87°F | Sunny | 0 to 7 mph SW | 0% |
| Wednesday Night | 63°F | Partly Cloudy then Chance Showers And Thunderstorms | 2 to 7 mph WSW | 38% |
| Thursday | 84°F | Showers And Thunderstorms Likely | 2 to 8 mph WSW | 69% |
| Thursday Night | 62°F | Showers And Thunderstorms Likely | 1 to 7 mph WSW | 69% |
| Friday | 84°F | Chance Showers And Thunderstorms | 1 to 6 mph SW | 46% |
| Friday Night | 61°F | Chance Showers And Thunderstorms then Partly Cloudy | 2 to 6 mph SW | 46% |
| Saturday | 86°F | Mostly Sunny | 2 to 10 mph SW | 11% |
| Saturday Night | 64°F | Mostly Clear then Chance Rain Showers | 3 to 9 mph SW | 25% |
| Sunday | 88°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 3 to 15 mph SW | 25% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms | 8 to 15 mph SW | 42% |
| Monday | 87°F | Chance Rain Showers | 7 to 12 mph WSW | 42% |
| Monday Night | 65°F | Chance Showers And Thunderstorms | 7 to 12 mph WSW | 52% |
Forecast source: National Weather Service (api.weather.gov) for Tecumseh (42.006, -83.944). Updated through the day.
Growing snapshot for Tecumseh
Last spring frost
May 3
First fall frost
Oct 13
Growing season
160 days
Hardiness zone
6a
More local growing data for Tecumseh: nearby ZIP 49286 weather · frost dates · planting calendar · Michigan frost dates
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Onsted
Climate data from the nearest NOAA station, Tecumseh, Mi (0.5 mi from Tecumseh). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.