Mackinac Island weather in August
In August, Mackinac Island sees average daytime highs of 73°F and overnight lows near 62°F, with 3.4 in of rain across 10 wet days and about 13.9 hours of daylight. It is the 2nd-warmest and 3rd-wettest month of the year here.
Highs ease over the month, from about 75°F in the first days to 71°F by the end. The sky is clear or mostly clear about 39% of the time in August, and the air most often feels humid.
Daylight stretches from about 14 h 36 min at the start of August to 13 h 12 min by month's end. Set against the rest of the year, August is Mackinac Island's 2nd-clearest and 10th-windiest month. For the whole year in context, see Mackinac Island's year-round climate.
- Daytime high
- 73°
- 2nd warmest
- Overnight low
- 62°
- 11th coldest
- Rainfall
- 3.4 in
- 10 wet days
- Daylight
- 14 hours
- 5:44 AM – 7:41 PM
- Cloud cover
- 52%
- 2nd clearest
- Wind
- 9 mph
- 10th windiest
- Solar energy
- 5.49 kWh/m²
- Travel score
- 6.9
- out of 10
Mackinac Island is city located on Mackinac Island in Michigan.
- Founded
- 1671
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in August
Highs ease over the month, from about 75°F in the first days to 71°F by the end.
A typical August day in Mackinac Island reaches about 73°F in the afternoon and slips back to 62°F overnight — a 11°F spread between the day's warmth and the night's chill. On most days the high lands between 66°F and 79°F. Set against its neighbours, August runs on par with July and about 7°F warmer than September.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 75 | 75 | 75 | 74 | 74 | 74 | 74 | 74 | 74 | 74 | 74 | 74 | 74 | 73 | 73 | 73 | 73 | 73 | 73 | 73 | 73 | 73 | 72 | 72 | 72 | 72 | 72 | 72 | 71 | 71 | 71 |
| Avg low (°F) | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 62 | 62 | 62 | 62 | 62 | 62 | 62 | 62 | 62 | 62 | 61 | 61 | 61 | 61 | 61 | 61 | 60 | 60 | 60 | 60 | 60 | 60 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 75 | 63 |
| 2 | 75 | 63 |
| 3 | 75 | 63 |
| 4 | 74 | 63 |
| 5 | 74 | 63 |
| 6 | 74 | 63 |
| 7 | 74 | 63 |
| 8 | 74 | 63 |
| 9 | 74 | 63 |
| 10 | 74 | 62 |
| 11 | 74 | 62 |
| 12 | 74 | 62 |
| 13 | 74 | 62 |
| 14 | 73 | 62 |
| 15 | 73 | 62 |
| 16 | 73 | 62 |
| 17 | 73 | 62 |
| 18 | 73 | 62 |
| 19 | 73 | 62 |
| 20 | 73 | 61 |
| 21 | 73 | 61 |
| 22 | 73 | 61 |
| 23 | 72 | 61 |
| 24 | 72 | 61 |
| 25 | 72 | 61 |
| 26 | 72 | 60 |
| 27 | 72 | 60 |
| 28 | 72 | 60 |
| 29 | 71 | 60 |
| 30 | 71 | 60 |
| 31 | 71 | 60 |
How August really feels in Mackinac Island
Once humidity and wind are folded in, August averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.
August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Mackinac Island weather by month
How August compares with the rest of the year at a glance. August is the 2nd-warmest and 3rd-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 24° / 14° | 1.9 | 9.9 | 10.9 | 8.9 | 0.0 |
| Feb | 24° / 13° | 1.6 | 7.4 | 7.3 | 10.1 | 0.0 |
| Mar | 33° / 21° | 2.0 | 8.4 | 6.1 | 11.6 | 0.0 |
| Apr | 44° / 32° | 2.9 | 9.7 | 3.2 | 13.3 | 0.9 |
| May | 56° / 43° | 2.9 | 10.2 | 0.3 | 14.7 | 3.7 |
| Jun | 68° / 55° | 3.0 | 10 | 0 | 15.5 | 6.3 |
| Jul | 74° / 62° | 3.3 | 10.9 | 0 | 15.2 | 6.9 |
| Aug | 73° / 62° | 3.4 | 10 | 0 | 13.9 | 6.9 |
| Sep | 66° / 55° | 3.5 | 11.4 | 0 | 12.3 | 5.9 |
| Oct | 54° / 44° | 3.7 | 13.5 | 0.2 | 10.7 | 3.0 |
| Nov | 42° / 34° | 2.6 | 11.6 | 5.7 | 9.3 | 0.5 |
| Dec | 32° / 24° | 2.3 | 11.3 | 11.3 | 8.5 | 0.0 |
Cloud cover in August
The sky is clear or mostly clear about 39% of the time in August.
Beyond those clear spells, partly cloudy skies cover about 18% of August, with mostly cloudy or overcast conditions the remaining 43%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 60 | 61 | 61 | 61 | 61 | 61 | 61 | 60 | 60 | 60 | 60 | 59 | 58 | 58 | 57 | 56 | 56 | 55 | 54 | 54 | 54 | 54 | 53 | 54 | 54 | 55 | 55 | 56 | 56 | 56 | 57 |
| Cloudier (%) | 40 | 39 | 39 | 39 | 39 | 39 | 39 | 40 | 40 | 40 | 40 | 41 | 42 | 42 | 43 | 44 | 44 | 45 | 46 | 46 | 46 | 46 | 47 | 46 | 46 | 45 | 45 | 44 | 44 | 44 | 43 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 60 | 40 |
| 2 | 61 | 39 |
| 3 | 61 | 39 |
| 4 | 61 | 39 |
| 5 | 61 | 39 |
| 6 | 61 | 39 |
| 7 | 61 | 39 |
| 8 | 60 | 40 |
| 9 | 60 | 40 |
| 10 | 60 | 40 |
| 11 | 60 | 40 |
| 12 | 59 | 41 |
| 13 | 58 | 42 |
| 14 | 58 | 42 |
| 15 | 57 | 43 |
| 16 | 56 | 44 |
| 17 | 56 | 44 |
| 18 | 55 | 45 |
| 19 | 54 | 46 |
| 20 | 54 | 46 |
| 21 | 54 | 46 |
| 22 | 54 | 46 |
| 23 | 53 | 47 |
| 24 | 54 | 46 |
| 25 | 54 | 46 |
| 26 | 55 | 45 |
| 27 | 55 | 45 |
| 28 | 56 | 44 |
| 29 | 56 | 44 |
| 30 | 56 | 44 |
| 31 | 57 | 43 |
Chance of precipitation in August
Mackinac Island gets around 3.4 in of rain over 10 wet days in August. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 33% and peaks near 36% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 36 | 35 | 35 | 35 | 34 | 34 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 33 | 33 |
| Rain chance (%) | |
|---|---|
| 1 | 36 |
| 2 | 35 |
| 3 | 35 |
| 4 | 35 |
| 5 | 34 |
| 6 | 34 |
| 7 | 33 |
| 8 | 33 |
| 9 | 33 |
| 10 | 33 |
| 11 | 33 |
| 12 | 33 |
| 13 | 33 |
| 14 | 33 |
| 15 | 32 |
| 16 | 32 |
| 17 | 32 |
| 18 | 32 |
| 19 | 32 |
| 20 | 32 |
| 21 | 32 |
| 22 | 32 |
| 23 | 32 |
| 24 | 32 |
| 25 | 32 |
| 26 | 32 |
| 27 | 32 |
| 28 | 32 |
| 29 | 32 |
| 30 | 33 |
| 31 | 33 |
Humidity in August
Most of August feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the humid band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 16% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 16 | 16 | 17 | 17 | 18 | 18 | 19 | 20 | 21 | 22 | 22 | 23 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 27 | 27 | 28 | 29 | 30 | 31 | 32 |
| Comfortable (%) | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 31 | 31 |
| Humid (%) | 34 | 33 | 33 | 33 | 33 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 33 | 32 | 32 | 32 | 32 | 31 | 31 | 30 | 30 | 29 | 29 | 28 | 28 | 27 | 26 | 26 | 25 |
| Muggy (%) | 19 | 19 | 19 | 19 | 18 | 18 | 17 | 17 | 16 | 15 | 15 | 14 | 14 | 14 | 14 | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 12 |
| Oppressive (%) | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 16 | 28 | 34 | 19 | 3 |
| 2 | 16 | 28 | 33 | 19 | 3 |
| 3 | 17 | 28 | 33 | 19 | 3 |
| 4 | 17 | 28 | 33 | 19 | 3 |
| 5 | 18 | 28 | 33 | 18 | 3 |
| 6 | 18 | 28 | 32 | 18 | 3 |
| 7 | 19 | 28 | 32 | 17 | 3 |
| 8 | 20 | 28 | 32 | 17 | 3 |
| 9 | 21 | 28 | 32 | 16 | 3 |
| 10 | 22 | 28 | 32 | 15 | 3 |
| 11 | 22 | 28 | 32 | 15 | 3 |
| 12 | 23 | 28 | 32 | 14 | 3 |
| 13 | 24 | 28 | 32 | 14 | 2 |
| 14 | 24 | 28 | 32 | 14 | 2 |
| 15 | 24 | 28 | 33 | 14 | 2 |
| 16 | 25 | 28 | 32 | 13 | 2 |
| 17 | 25 | 28 | 32 | 14 | 1 |
| 18 | 25 | 28 | 32 | 14 | 1 |
| 19 | 25 | 28 | 32 | 14 | 1 |
| 20 | 25 | 29 | 31 | 14 | 1 |
| 21 | 26 | 29 | 31 | 14 | 0 |
| 22 | 26 | 29 | 30 | 14 | 0 |
| 23 | 26 | 30 | 30 | 14 | 0 |
| 24 | 26 | 30 | 29 | 14 | 0 |
| 25 | 27 | 31 | 29 | 14 | 0 |
| 26 | 27 | 31 | 28 | 13 | 0 |
| 27 | 28 | 31 | 28 | 13 | 0 |
| 28 | 29 | 31 | 27 | 13 | 0 |
| 29 | 30 | 31 | 26 | 13 | 0 |
| 30 | 31 | 31 | 26 | 12 | 0 |
| 31 | 32 | 31 | 25 | 12 | 0 |
Wind in August
Winds average 9 mph in August.
Across August, daily wind ranges from about 9 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 9 | light breeze |
| 2 | 9 | light breeze |
| 3 | 9 | light breeze |
| 4 | 9 | light breeze |
| 5 | 9 | light breeze |
| 6 | 9 | light breeze |
| 7 | 9 | light breeze |
| 8 | 9 | light breeze |
| 9 | 9 | light breeze |
| 10 | 9 | light breeze |
| 11 | 9 | light breeze |
| 12 | 9 | light breeze |
| 13 | 9 | light breeze |
| 14 | 9 | light breeze |
| 15 | 9 | light breeze |
| 16 | 9 | light breeze |
| 17 | 9 | light breeze |
| 18 | 9 | light breeze |
| 19 | 9 | light breeze |
| 20 | 9 | light breeze |
| 21 | 9 | light breeze |
| 22 | 9 | light breeze |
| 23 | 9 | light breeze |
| 24 | 9 | light breeze |
| 25 | 9 | light breeze |
| 26 | 9 | light breeze |
| 27 | 9 | light breeze |
| 28 | 9 | light breeze |
| 29 | 9 | light breeze |
| 30 | 9 | light breeze |
| 31 | 9 | light breeze |
Sunrise & sunset in August
Daylight runs from about 14 h 36 min at the start of August to 13 h 12 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 84 minutes over August. Sunrise moves from 5:25 AM to 6:03 AM, and sunset from 8:04 PM to 7:14 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 14.6 | 14.6 | 14.6 | 14.5 | 14.5 | 14.4 | 14.4 | 14.3 | 14.3 | 14.2 | 14.2 | 14.2 | 14.1 | 14.1 | 14.0 | 14.0 | 13.9 | 13.9 | 13.8 | 13.8 | 13.7 | 13.7 | 13.6 | 13.6 | 13.5 | 13.5 | 13.4 | 13.4 | 13.3 | 13.2 | 13.2 |
| Sunrise (AM) | 5:25 | 5:26 | 5:28 | 5:29 | 5:30 | 5:31 | 5:32 | 5:34 | 5:35 | 5:36 | 5:37 | 5:39 | 5:40 | 5:41 | 5:42 | 5:44 | 5:45 | 5:46 | 5:47 | 5:49 | 5:50 | 5:51 | 5:53 | 5:54 | 5:55 | 5:56 | 5:58 | 5:59 | 6:00 | 6:02 | 6:03 |
| Sunset (PM) | 8:04 | 8:03 | 8:01 | 8:00 | 7:58 | 7:57 | 7:56 | 7:54 | 7:53 | 7:51 | 7:50 | 7:48 | 7:46 | 7:45 | 7:43 | 7:41 | 7:40 | 7:38 | 7:36 | 7:35 | 7:33 | 7:31 | 7:29 | 7:27 | 7:26 | 7:24 | 7:22 | 7:20 | 7:18 | 7:16 | 7:14 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.6 | 5:25 | 8:04 |
| 2 | 14.6 | 5:26 | 8:03 |
| 3 | 14.6 | 5:28 | 8:01 |
| 4 | 14.5 | 5:29 | 8:00 |
| 5 | 14.5 | 5:30 | 7:58 |
| 6 | 14.4 | 5:31 | 7:57 |
| 7 | 14.4 | 5:32 | 7:56 |
| 8 | 14.3 | 5:34 | 7:54 |
| 9 | 14.3 | 5:35 | 7:53 |
| 10 | 14.2 | 5:36 | 7:51 |
| 11 | 14.2 | 5:37 | 7:50 |
| 12 | 14.2 | 5:39 | 7:48 |
| 13 | 14.1 | 5:40 | 7:46 |
| 14 | 14.1 | 5:41 | 7:45 |
| 15 | 14.0 | 5:42 | 7:43 |
| 16 | 14.0 | 5:44 | 7:41 |
| 17 | 13.9 | 5:45 | 7:40 |
| 18 | 13.9 | 5:46 | 7:38 |
| 19 | 13.8 | 5:47 | 7:36 |
| 20 | 13.8 | 5:49 | 7:35 |
| 21 | 13.7 | 5:50 | 7:33 |
| 22 | 13.7 | 5:51 | 7:31 |
| 23 | 13.6 | 5:53 | 7:29 |
| 24 | 13.6 | 5:54 | 7:27 |
| 25 | 13.5 | 5:55 | 7:26 |
| 26 | 13.5 | 5:56 | 7:24 |
| 27 | 13.4 | 5:58 | 7:22 |
| 28 | 13.4 | 5:59 | 7:20 |
| 29 | 13.3 | 6:00 | 7:18 |
| 30 | 13.2 | 6:02 | 7:16 |
| 31 | 13.2 | 6:03 | 7:14 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 5.49 kWh/m².
For context, solar energy here swings from a low near 1.15 kWh/m² to a high of 6.61 kWh/m² in June across the year — August's 5.49 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.1 | 6.0 | 6.0 | 6.0 | 5.9 | 5.9 | 5.9 | 5.8 | 5.8 | 5.8 | 5.7 | 5.7 | 5.7 | 5.6 | 5.6 | 5.5 | 5.5 | 5.4 | 5.4 | 5.3 | 5.3 | 5.2 | 5.2 | 5.2 | 5.1 | 5.1 | 5.0 | 5.0 | 4.9 | 4.9 | 4.9 |
| Level | Intense | Intense | Intense | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.1 | Intense |
| 2 | 6.0 | Intense |
| 3 | 6.0 | Intense |
| 4 | 6.0 | Bright |
| 5 | 5.9 | Bright |
| 6 | 5.9 | Bright |
| 7 | 5.9 | Bright |
| 8 | 5.8 | Bright |
| 9 | 5.8 | Bright |
| 10 | 5.8 | Bright |
| 11 | 5.7 | Bright |
| 12 | 5.7 | Bright |
| 13 | 5.7 | Bright |
| 14 | 5.6 | Bright |
| 15 | 5.6 | Bright |
| 16 | 5.5 | Bright |
| 17 | 5.5 | Bright |
| 18 | 5.4 | Bright |
| 19 | 5.4 | Bright |
| 20 | 5.3 | Bright |
| 21 | 5.3 | Bright |
| 22 | 5.2 | Bright |
| 23 | 5.2 | Bright |
| 24 | 5.2 | Bright |
| 25 | 5.1 | Bright |
| 26 | 5.1 | Bright |
| 27 | 5.0 | Bright |
| 28 | 5.0 | Bright |
| 29 | 4.9 | Bright |
| 30 | 4.9 | Bright |
| 31 | 4.9 | Bright |
Is August a good time to visit Mackinac Island?
Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
August is a reasonable time to visit Mackinac Island for sightseeing.
What to pack for Mackinac Island in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Mackinac Island sees daytime highs around 73°F and nights near 62°F. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.
Sea temperature near Mackinac Island in August
The nearest coast averages about 66°F in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in August at about 66°F and coldest in February near 34°F.
The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 35 | 34 | 34 | 36 | 41 | 52 | 62 | 66 | 61 | 53 | 44 | 38 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Cool | Bracing | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 35 | Bracing |
| Feb | 34 | Bracing |
| Mar | 34 | Bracing |
| Apr | 36 | Bracing |
| May | 41 | Bracing |
| Jun | 52 | Bracing |
| Jul | 62 | Cool |
| Aug | 66 | Cool |
| Sep | 61 | Cool |
| Oct | 53 | Bracing |
| Nov | 44 | Bracing |
| Dec | 38 | Bracing |
UV index in Mackinac Island in August
Clear-sky midday UV in August peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Mackinac Island peaks around June 19 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 3 | 5 | 7 | 8 | 8 | 7 | 5 | 3 | 2 | 1 |
| Level | Low | Low | Moderate | Moderate | High | Very high | Very high | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Low |
| Mar | 3 | Moderate |
| Apr | 5 | Moderate |
| May | 7 | High |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 7 | High |
| Sep | 5 | Moderate |
| Oct | 3 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Where is Mackinac Island?
Mackinac Island sits at 45.8°N, 84.6°W, 0 ft above sea level, in United States. The nearest listed city is Sault Ste. Marie, 47 mi away.
Topography around Mackinac Island
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Mackinac Island.
Within 2 miles, the terrain around Mackinac Island has only modest variations in elevation — a maximum elevation change of 351 ft around an average of 614 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 351 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,037 ft.
The land around Mackinac Island is covered by water (72%) and trees (24%) within 2 miles, water (75%) and trees (22%) within 10 miles, and trees (48%) and water (44%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Mackinac Island (45.8492°, -84.6189°, elevation 0 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).