Mackinac Island Weather: August
 |
Average Day Temperature: | 71.6°F |
|
Average Night Temperature: | 65.5°F |
|
Sea Water Temperature: | 69.2°F |
|
Number of Sunny Days: | 14 days |
| Sunshine Hours: | 13.3 - 14.8 hours | |
|
Number of Rainy Days: | 3 days |
| Precipitation Totals: | 0.9 in | |
| detailed information | ||
forecast
| Mackinac Island |
Temperature
| Mackinac Island |
Air Temperature in August, °F
The highest day temperature in August 2025 was 83°F. The lowest night temperature was 54°F. The average values for day and night temperatures during August were 70.2°F и 66.6°F respectivly.
Mackinac Island Water Sea Temperature in August, °F
The average sea surface temperature in August 2025 for Mackinac Island was 71.6°F. The maximum and minimum values were 67.0°F and 74.8°F respectively.
Most of the days in August are sunny but you can also expect cloudy and gloomy days.
Precipitation Totals in August, in
Precipitation total in August for Mackinac Island is 0.9 in.
The average wind speed in August is 8.7 mph. It makes August one of the most windless months of the year for Mackinac Island.
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 August is 8.7 hours.
Mackinac Island on the Weather Map
| Chicago |  |
0 |
| Hawaii |  |
+78 |
| Honolulu | |
+78 |
| Houston | |
+46 |
| Las Vegas |  |
+40 |
| Los Angeles | |
+52 |
| Maui | |
+72 |
| Miami | |
+72 |
| Miami Beach | |
+80 |
| New York | |
+18 |
| San Diego | |
+54 |
| San Francisco | |
+46 |
| Sarasota | |
+62 |
| Tampa | |
+62 |
| Washington | |
+28 |
| 0300 |  |
18°F | N 22 mph |
| 0600 |  |
22°F | NE 24 mph |
| 0900 | |
26°F | NE 22 mph |
| 1200 | |
26°F | NE 19 mph |
| 1500 | |
28°F | NE 16 mph |
| 1800 | |
30°F | NE 16 mph |
| 2100 |  |
30°F | NE 16 mph |
| 0000 | |
30°F | E 17 mph |