Mackinac Island Weather: September
 |
Average Day Temperature: | 64.5°F |
|
Average Night Temperature: | 59.1°F |
|
Sea Water Temperature: | 64.1°F |
|
Number of Sunny Days: | 12 days |
| Sunshine Hours: | 11.7 - 13.3 hours | |
|
Number of Rainy Days: | 1 day |
| Precipitation Totals: | 0.6 in | |
| detailed information | ||
forecast
| Mackinac Island |
Temperature
| Mackinac Island |
Air Temperature in September, °F
The highest day temperature in September 2026 was 77°F. The lowest night temperature was 50°F. The average values for day and night temperatures during September were 64.8°F и 59.1°F respectivly.
Mackinac Island Water Sea Temperature in September, °F
The average sea surface temperature in September 2026 for Mackinac Island was 64.2°F. The maximum and minimum values were 58.4°F and 69.2°F respectively.
You can expect various weather conditions during September. Be ready for sunny, cloudy or even gloomy days.
Precipitation Totals in September, in
Precipitation total in September for Mackinac Island is 0.6 in. It makes september one of the least rainy months of the year.
The average wind speed in September is 9.6 mph.
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Mackinac Island in September is 6.9 hours.
Mackinac Island on the Weather Map
| Boston |  |
+58 |
| Chicago | |
+60 |
| Hawaii |  |
+82 |
| Houston |  |
+84 |
| Las Vegas |  |
+92 |
| Los Angeles | |
+102 |
| Maui |  |
+74 |
| Miami | |
+88 |
| Myrtle Beach | |
+70 |
| New York | |
+62 |
| San Diego | |
+84 |
| San Francisco | |
+66 |
| Santa Monica | |
+94 |
| Sarasota | |
+84 |
| Washington | |
+64 |
| 0000 |  |
48°F | S 4 mph |
| 0300 | |
46°F | N 6 mph |
| 0600 | |
46°F | N 10 mph |
| 0900 | |
46°F | N 11 mph |
| 1200 | |
54°F | N 12 mph |
| 1500 |  |
64°F | N 14 mph |
| 1800 | |
66°F | NE 13 mph |
| 2100 | |
64°F | NE 19 mph |