Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September's arrival signals a moderate reduction in the average high-temperature, easing from a pleasant 71.1°F (21.7°C) in August to a comfortable 64.8°F (18.2°C). In Mackinaw City, an average low-temperature of 53.1°F (11.7°C) is recorded during September nights.Humidity
The average relative humidity in September is 79%.Rainfall
In Mackinaw City, in September, during 11.4 rainfall days, 1.73" (44mm) of precipitation is typically accumulated. Throughout the year, there are 131 rainfall days, and 21.22" (539mm) of precipitation is accumulated.Snowfall
In Mackinaw City, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 31min.On the first day of the month, sunrise is at 7:00 am and sunset at 8:16 pm. On the last day of September, sunrise is at 7:36 am and sunset at 7:20 pm EDT.
Sunshine
The average sunshine in September is 7.8h.UV index
In Mackinaw City, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: In September, a regular UV index of 3 translates into these guidelines:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How much does it rain in Mackinaw City in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September in Mackinaw City?
When is the sunrise / sunset in September in Mackinaw City?
How many hours of sunshine does Mackinaw City have in September?
How high is the UV index in September?
Average temperature in September
Mackinaw City, MI
- Average high temperature in September: 64.8°F
The warmest month (with the highest average high temperature) is July (71.4°F).
The month with the lowest average high temperature is January (23.4°F).
- Average low temperature in September: 53.1°F
The month with the highest average low temperature is August (58.6°F).
The coldest month (with the lowest average low temperature) is February (14.4°F).
Average pressure in September
Mackinaw City, MI
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Mackinaw City, MI
- Average wind speed in September: 8.5mph
The windiest months (with the highest average wind speed) are November and December (10.9mph).
The calmest months (with the lowest average wind speed) are June and July (7.6mph).
Average humidity in September
Mackinaw City, MI
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is May (75%).
Average rainfall in September
Mackinaw City, MI
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is October (2.72").
The driest month (with the least rainfall) is January (1.3").
Average rainfall days in September
Mackinaw City, MI
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is October (16.5 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in September
Mackinaw City, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.91").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Mackinaw City, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (21.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Mackinaw City, MI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 7h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 1h and 54min).
Average sunshine days in September
Mackinaw City, MI
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is September (16.9 days).
The month with the least sunshine days is January (7.1 days).
Average UV index in September
Mackinaw City, MI
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in September
Mackinaw City, MI
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 80).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in September
Mackinaw City, MI
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Mackinaw City, Michigan, USA
Weather forecast for your location
2. Allow the app to use your location