Port Sanilac, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Port Sanilac, a village in Sanilac County, Michigan.
Today
65°F
Light Rain
Rain. Mostly cloudy. High near 65, with temperatures falling to around 62 in the afternoon. South wind 14 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Port Sanilac
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 65°F | Light Rain | 14 to 20 mph S | 93% |
| Tonight | 51°F | Chance Light Rain then Mostly Cloudy | 10 to 18 mph SSW | 41% |
| Thursday | 58°F | Mostly Cloudy then Slight Chance Light Rain | 12 to 16 mph SW | 20% |
| Thursday Night | 43°F | Light Rain Likely | 7 to 10 mph W | 58% |
| Friday | 51°F | Light Rain | 7 to 15 mph NNW | 83% |
| Friday Night | 38°F | Light Rain | 16 mph NNW | 77% |
| Saturday | 48°F | Light Rain Likely | 13 to 16 mph NNW | 57% |
| Saturday Night | 35°F | Slight Chance Light Rain then Mostly Cloudy | 12 mph WNW | 17% |
| Sunday | 52°F | Mostly Sunny | 12 to 15 mph W | 9% |
| Sunday Night | 36°F | Partly Cloudy | 14 mph WNW | 9% |
| Monday | 53°F | Mostly Sunny | 10 to 14 mph W | 4% |
| Monday Night | 40°F | Partly Cloudy | 14 mph WSW | 5% |
| Tuesday | 55°F | Mostly Sunny | 12 to 15 mph W | 8% |
| Tuesday Night | 37°F | Slight Chance Light Rain | 12 mph WNW | 15% |
Forecast source: National Weather Service (api.weather.gov) for Port Sanilac (43.428, -82.545). Updated through the day.
Growing snapshot for Port Sanilac
Last spring frost
May 4
First fall frost
Oct 24
Growing season
171 days
Hardiness zone
6a
More local growing data for Port Sanilac: nearby ZIP 48469 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Applegate
Brown City
Carsonville
Croswell
Deckerville
Forestville
Lexington
Marlette
Melvin
Minden City
Peck
Sandusky
Snover
Ubly
Climate data from the nearest NOAA station, Lexington Wtp, Mi (12.4 mi from Port Sanilac). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.