Port Huron, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Port Huron, a city in St. Clair County, Michigan.
Overnight
61°F
Mostly Cloudy
Mostly cloudy, with a low around 61. South wind around 10 mph, with gusts as high as 20 mph.
7-day forecast for Port Huron
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Mostly Cloudy | 10 mph S | 2% |
| Wednesday | 66°F | Light Rain | 10 to 16 mph S | 99% |
| Wednesday Night | 52°F | Chance Light Rain then Mostly Cloudy | 8 to 17 mph SSW | 44% |
| Thursday | 59°F | Mostly Cloudy | 9 to 14 mph SW | 4% |
| Thursday Night | 44°F | Chance Light Rain | 3 to 8 mph WSW | 46% |
| Friday | 53°F | Light Rain Likely | 5 to 10 mph NW | 65% |
| Friday Night | 38°F | Light Rain Likely | 10 mph NW | 65% |
| Saturday | 49°F | Chance Light Rain | 9 to 15 mph NW | 51% |
| Saturday Night | 33°F | Mostly Cloudy | 8 mph WNW | 13% |
| Sunday | 53°F | Mostly Sunny | 7 to 12 mph W | 8% |
| Sunday Night | 34°F | Partly Cloudy | 9 mph W | 8% |
| Monday | 55°F | Mostly Sunny | 7 to 10 mph WSW | 4% |
| Monday Night | 38°F | Partly Cloudy | 8 mph SW | 6% |
| Tuesday | 58°F | Mostly Sunny | 10 mph W | 8% |
Forecast source: National Weather Service (api.weather.gov) for Port Huron (42.994, -82.434). Updated through the day.
Growing snapshot for Port Huron
Last spring frost
Apr 19
First fall frost
Nov 3
Growing season
196 days
Hardiness zone
6b
More local growing data for Port Huron: nearby ZIP 48060 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Port Huron, Mi (2.1 mi from Port Huron). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.