Port Sanilac, MI Weather & Growing Conditions
Today
83°F
Sunny
Sunny, with a high near 83. South wind around 12 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Sunny | 12 mph S | 0% |
| Tonight | 63°F | Mostly Clear | 8 to 12 mph S | 0% |
| Wednesday | 85°F | Sunny | 8 mph SSW | 0% |
| Wednesday Night | 66°F | Slight Chance Showers And Thunderstorms | 7 mph WNW | 56% |
| Thursday | 77°F | Rain Showers | 8 mph WNW | 75% |
| Thursday Night | 64°F | Showers And Thunderstorms Likely | 3 to 7 mph N | 61% |
| Friday | 81°F | Chance Showers And Thunderstorms | 3 to 7 mph S | 31% |
| Friday Night | 66°F | Chance Showers And Thunderstorms then Partly Cloudy | 6 mph SSE | 31% |
| Saturday | 83°F | Sunny | 6 to 9 mph SW | 11% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 8 mph SSW | 32% |
| Sunday | 84°F | Chance Rain Showers | 7 to 14 mph SW | 33% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms | 10 mph W | 46% |
| Monday | 80°F | Chance Rain Showers | 10 mph WSW | 46% |
| Monday Night | 66°F | Chance Showers And Thunderstorms | 8 mph WSW | 50% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Port Sanilac, MI
Last spring frost
May 4
First fall frost
Oct 24
Growing season
171 days
Hardiness zone
6a
Explore more for Port Sanilac, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Lexington Wtp, Mi (12.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.