September weather forecast
Afton, MI

Weather in September

The first month of the autumn, September, is still a comfortable month in Afton, Michigan, with an average temperature fluctuating between 66.4°F (19.1°C) and 52.7°F (11.5°C).

Temperature

In September, the average high-temperature slightly decreases from a moderately hot 73.4°F (23°C) in August to an enjoyable 66.4°F (19.1°C). In Afton, the average low-temperature is 52.7°F (11.5°C).

Humidity

The average relative humidity in September is 78%.

Rainfall

In Afton, Michigan, during September, the rain falls for 11.8 days and regularly aggregates up to 1.77" (45mm) of precipitation. Throughout the year, there are 129.4 rainfall days, and 21.34" (542mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall in Afton, Michigan.

Daylight

In Afton, the average length of the day in September is 12h and 31min.
On the first day of September, sunrise is at 6:59 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 7:20 pm EDT.

Sunshine

In September, the average sunshine is 7.8h.

UV index

In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.
Note: The daily maximum UV index of 3 in September interpret into the following advice:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the average humidity in September in Afton?

In September, the average relative humidity in Afton, Michigan, is 78%.

How much does it rain in Afton in September?

In Afton, Michigan, in September, it is raining for 11.8 days, with typically 1.77" (45mm) of accumulated precipitation.

When it does not snow in Afton?

May through September are months without snowfall.

Does it snow in Afton in September?

In Afton, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Afton?

The average day length in September is 12h and 31min.

When are sunrise and sunset in September in Afton?

In September, on the first day of the month, sunrise is at 6:59 am and sunset at 8:15 pm. On the last day of the month, in Afton, sunrise is at 7:35 am and sunset at 7:20 pm EDT.

How long on average sun shines in September in Afton?

In Afton, the average sunshine duration in September is 7.8h.

How high is the UV index in September in Afton?

The average daily maximum UV index in September in Afton, Michigan, is 3. A UV Index value of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Afton, MI

Average temperature in September - Afton, MI
  • Average high temperature in September: 66.4°F

The warmest month (with the highest average high temperature) is August (73.4°F).
The month with the lowest average high temperature is January (24.1°F).

  • Average low temperature in September: 52.7°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 (15.3°F).

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Average pressure in September
Afton, MI

Average pressure in September - Afton, 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).

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Average wind speed in September
Afton, MI

Average wind speed in September - Afton, MI
  • Average wind speed in September: 7.9mph

The windiest months (with the highest average wind speed) are January and December (10.1mph).
The calmest months (with the lowest average wind speed) are June and July (7.3mph).

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Average humidity in September
Afton, MI

Average humidity in September - Afton, MI
  • Average humidity in September: 78%

The month with the highest relative humidity is February (89%).
The month with the lowest relative humidity is May (74%).

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Average rainfall in September
Afton, MI

Average rainfall in September - Afton, MI
  • Average rainfall in September: 1.77"

The wettest month (with the highest rainfall) is October (2.68").
The driest month (with the least rainfall) is February (1.22").

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Average rainfall days in September
Afton, MI

Average rainfall days in September - Afton, MI
  • Average rainfall days in September: 11.8 days

The month with the highest number of rainy days is October (17.5 days).
The month with the least rainy days is February (3.8 days).

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Average snowfall in September
Afton, MI

Average snowfall in September - Afton, MI
  • Average snowfall in September: 0"

The month with the highest snowfall is January (6.69").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Afton, MI

Average snowfall days in September - Afton, MI
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (22.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Afton, MI

Average daylight in September / Average sunshine in September - Afton, MI
  • Average daylight in September: 12h and 31min

The month with the longest days is June (Average daylight: 15h and 37min).
The month with the shortest days is December (Average daylight: 8h and 47min).

  • Average sunshine in September: 7h and 48min

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 48min).

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Average sunshine days in September
Afton, MI

Average sunshine days in September - Afton, 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 (7 days).

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Average UV index in September
Afton, MI

Average UV index in September - Afton, 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).

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Average cloud cover in September
Afton, MI

Average cloud cover in September - Afton, MI
  • Average cloud cover in September: 35

The month with the most cloud cover is January (Cloud cover 81).
The month with the least cloud cover is July (Cloud cover 32).

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Average visibility in September
Afton, MI

Average visibility in September - Afton, MI
  • Average visibility in September: 6mi

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).

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