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 shift from August to September includes a minor decrease in the average high-temperature, lightly dropping from a moderately hot 74.8°F (23.8°C) to a refreshing 66.6°F (19.2°C). An average minimum temperature of 47.7°F (8.7°C) is recorded during the month of September.Humidity
The average relative humidity in September is 81%.Rainfall
In September, the rain falls for 12 days. Throughout September, 1.61" (41mm) of precipitation is accumulated. Throughout the year, there are 133.2 rainfall days, and 21.81" (554mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Alpha.Daylight
The average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 6:15 am and sunset at 7:31 pm. On the last day of September, sunrise is at 6:51 am and sunset at 6:34 pm CDT.
Sunshine
In Alpha, the average sunshine in September is 7.7h.UV index
In Alpha, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: During September, 3 as the daily maximum UV index converts into the following advice:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Alpha have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Alpha, MI
- Average high temperature in September: 66.6°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is January (19.8°F).
- Average low temperature in September: 47.7°F
The month with the highest average low temperature is July (56.1°F).
The coldest month (with the lowest average low temperature) is January (9.1°F).
Average pressure in September
Alpha, 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 (29.91"Hg).
Average wind speed in September
Alpha, MI
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is November (8.5mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity in September
Alpha, MI
- Average humidity in September: 81%
The months with the highest relative humidity are January and February (91%).
The month with the lowest relative humidity is May (71%).
Average rainfall in September
Alpha, MI
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is April (2.68").
The driest month (with the least rainfall) is January (1.3").
Average rainfall days in September
Alpha, MI
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is May (16.2 days).
The month with the least rainy days is February (3.7 days).
Average snowfall in September
Alpha, MI
- Average snowfall in September: 0"
The month with the highest snowfall is February (10.75").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Alpha, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (26.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Alpha, 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 4min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The months with the least sunshine are January and February (Average sunshine: 2h and 12min).
Average sunshine days in September
Alpha, MI
- Average sunshine days in September: 16 days
The month with the most sunshine days is September (16 days).
The month with the least sunshine days is January (5.2 days).
Average UV index in September
Alpha, 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
Alpha, MI
- Average cloud cover in September: 44
The months with the most cloud cover are January and February (Cloud cover 79).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in September
Alpha, MI
- Average visibility in September: 5mi
The months with the highest visibility are May and June (6mi).
The months with the lowest visibility are January, February and March (4mi).
Alpha, Michigan, USA
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