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
The transition into September subtly indicates a reduction in the average high-temperature, down to a refreshing 65.1°F (18.4°C) from August's pleasant 71.8°F (22.1°C). McMillan in September anticipates an average nighttime temperature of 51.6°F (10.9°C).Humidity
The average relative humidity in September is 80%.Rainfall
In McMillan, during September, the rain falls for 12.7 days and regularly aggregates up to 1.93" (49mm) of precipitation. Throughout the year, there are 123.2 rainfall days, and 22.17" (563mm) of precipitation is accumulated.Snowfall
In McMillan, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 7:04 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 7:24 pm EDT.
Sunshine
The average sunshine in September in McMillan is 7.5h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: An average maximum UV index of 3 in September leads to these recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does McMillan have in September?
How high is the UV index in September in McMillan?
Average temperature in September
McMillan, MI
- Average high temperature in September: 65.1°F
The warmest month (with the highest average high temperature) is July (72.1°F).
The month with the lowest average high temperature is January (22.8°F).
- Average low temperature in September: 51.6°F
The month with the highest average low temperature is August (56.8°F).
The coldest month (with the lowest average low temperature) is February (13.6°F).
Average pressure in September
McMillan, 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
McMillan, MI
- Average wind speed in September: 8.3mph
The windiest month (with the highest average wind speed) is November (10.1mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in September
McMillan, MI
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (91%).
The month with the lowest relative humidity is May (73%).
Average rainfall in September
McMillan, MI
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is October (2.8").
The driest month (with the least rainfall) is March (1.5").
Average rainfall days in September
McMillan, MI
- Average rainfall days in September: 12.7 days
The month with the highest number of rainy days is October (15.3 days).
The month with the least rainy days is February (3.1 days).
Average snowfall in September
McMillan, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (10.08").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
McMillan, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (24.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
McMillan, 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 3min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 1h and 36min).
Average sunshine days in September
McMillan, MI
- Average sunshine days in September: 15.4 days
The month with the most sunshine days is June (16.3 days).
The month with the least sunshine days is January (5.8 days).
Average UV index in September
McMillan, 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, November and December (UV index 1).
Average cloud cover in September
McMillan, MI
- Average cloud cover in September: 38
The month with the most cloud cover is January (Cloud cover 83).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in September
McMillan, 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 and February (4mi).
McMillan, Michigan, USA
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