September weather forecastMount Pleasant, MI
September
Weather in September
September, the first month of the autumn in Mount Pleasant, is also an agreeable month, with temperature in the range of an average low of 51.8°F (11°C) and an average high of 70.7°F (21.5°C).Temperature
The average high-temperature shows a slight dip in September, from August's warm 76.8°F (24.9°C) to a pleasant 70.7°F (21.5°C). During September, Mount Pleasant records a consistent average nighttime temperature of 51.8°F (11°C).Humidity
The average relative humidity in September is 79%.Rainfall
September is the month with the least rainfall. Rain falls for 11.4 days and accumulates 1.22" (31mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 7:03 am and sunset at 8:13 pm. On the last day of September, sunrise is at 7:36 am and sunset at 7:21 pm EDT.
Sunshine
In September, the average sunshine in Mount Pleasant is 8.1h.UV index
In Mount Pleasant, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: During September, 3 as the daily maximum UV index converts into the following advice:
Put precautions into practice - Guidance to elude sunburn is provided. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mount Pleasant, MI
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in September: 51.8°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (16°F).
Average pressure in September
Mount Pleasant, MI
- Average pressure in September: 30.03"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
Mount Pleasant, MI
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in September
Mount Pleasant, MI
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Mount Pleasant, MI
- Average rainfall in September: 1.22"
The wettest month (with the highest rainfall) is May (2.99").
The driest month (with the least rainfall) is September (1.22").
Average rainfall days in September
Mount Pleasant, MI
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is October (15.5 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in September
Mount Pleasant, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (6.26").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Mount Pleasant, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (18.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Mount Pleasant, MI
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 8h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in September
Mount Pleasant, MI
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is September (16.4 days).
The month with the least sunshine days is January (9.6 days).
Average UV index in September
Mount Pleasant, MI
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Mount Pleasant, MI
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Mount Pleasant, MI
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, July, August, October and November (6mi).
The months with the lowest visibility are January, February, September and December (5mi).
