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.
This Afternoon
67°F
Partly Sunny
Partly sunny. High near 67, with temperatures falling to around 64 in the afternoon. North northeast wind around 13 mph, with gusts as high as 22 mph.
7-day forecast for Port Huron
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Partly Sunny | 13 mph NNE | 1% |
| Tonight | 54°F | Mostly Cloudy | 5 to 13 mph NE | 5% |
| Saturday | 67°F | Rain Showers Likely | 5 to 8 mph ESE | 57% |
| Saturday Night | 56°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 8 mph E | 72% |
| Sunday | 65°F | Chance Rain Showers | 6 to 15 mph NE | 36% |
| Sunday Night | 53°F | Slight Chance Rain Showers then Mostly Cloudy | 9 to 15 mph NE | 18% |
| Monday | 63°F | Mostly Cloudy | 13 mph NE | 3% |
| Monday Night | 50°F | Mostly Cloudy | 12 mph ENE | 8% |
| Tuesday | 62°F | Partly Sunny then Slight Chance Rain Showers | 13 mph ENE | 20% |
| Tuesday Night | 51°F | Chance Rain Showers | 13 mph ENE | 44% |
| Wednesday | 62°F | Chance Rain Showers | 12 mph E | 50% |
| Wednesday Night | 52°F | Chance Showers And Thunderstorms | 6 to 10 mph E | 50% |
| Thursday | 65°F | Slight Chance Showers And Thunderstorms | 9 mph ENE | 21% |
| Thursday Night | 53°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 8 mph NE | 16% |
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 Sep 18, 2026.