Port Huron Weather Forecast
- 65
- 86
Mostly Sunny
- 69
- 90
Chance Thunderstorms
- 63
- 79
Chance Rain Showers
- 61
- 78
Mostly Cloudy
- 63
- 78
Chance Rain Showers
- 62
- 79
Mostly Sunny
Today 15 Aug St. Clair
Sunny. Highs in the mid 80s. South Winds up to 5 Mph.
Tonight 15 Aug St. Clair
Mostly clear. Lows in the mid 60s. South Winds up to 5 Mph.
Port Huron Temperature Statistics
August Temperature
St Clair County International Airport (6.8 miles)
Lowest 2 August, 2025
46.4 °FAverage August
71.5 °FHighest 10 August, 2025
89.6 °F
Climate (2020–Present)
St Clair County International Airport (6.8 miles)
Average Low 2020–2025
40 °FAverage 2020–2025
49.6 °FAverage High 2020–2025
58.6 °F