Port Sanilac, MI Weather & Growing Conditions
This Afternoon
65°F
Light Rain
Rain. Cloudy. High near 65, with temperatures falling to around 62 in the afternoon. South wind around 16 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 65°F | Light Rain | 16 mph S | 84% |
| Tonight | 51°F | Light Rain Likely | 10 to 16 mph SSW | 41% |
| Thursday | 58°F | Mostly Cloudy then Chance Light Rain | 12 to 16 mph SW | 20% |
| Thursday Night | 43°F | Light Rain Likely | 13 mph WSW | 58% |
| Friday | 51°F | Light Rain Likely | 12 to 18 mph WNW | 83% |
| Friday Night | 38°F | Light Rain | 18 mph NW | 77% |
| Saturday | 48°F | Light Rain Likely | 16 mph NNW | 57% |
| Saturday Night | 35°F | Partly Cloudy | 12 mph WNW | 17% |
| Sunday | 52°F | Mostly Sunny | 10 to 16 mph W | 9% |
| Sunday Night | 36°F | Mostly Clear | 14 mph WNW | 9% |
| Monday | 53°F | Mostly Sunny | 13 mph W | 4% |
| Monday Night | 40°F | Partly Cloudy | 14 mph WSW | 5% |
| Tuesday | 55°F | Sunny | 14 mph W | 8% |
| Tuesday Night | 37°F | Partly Cloudy | 10 mph WNW | 15% |
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 Nov 4, 2026.