St Helena Island Nature Preserve Weather Forecast
- 55
- 75
Becoming Sunny
- 62
- 73
Mostly Sunny
- 67
- 76
Partly Sunny
- 67
- 77
Rain Likely
- 64
- 76
Chance Rain
- 63
- 77
Partly Sunny
Today 20 Jul Eastern Mackinac
Mostly sunny. Highs in the mid 70s. North Winds 5 to 15 Mph.
Tonight 20 Jul Eastern Mackinac
Partly cloudy. Lows in the lower 50s. North Winds 5 to 10 Mph.
St Helena Island Nature Preserve Temperature Statistics
July Temperature
Mackinac Island Airport (11.2 miles)
Lowest 4 July, 2025
51.8 °FAverage July
66.9 °FHighest 5 July, 2025
82.4 °F
Climate (2020–Present)
Mackinac Island Airport (11.2 miles)
Average Low 2020–2025
38.3 °FAverage 2020–2025
44.7 °FAverage High 2020–2025
51.1 °F