September weather forecast
Flint, MI

Weather in September

The first month of the autumn, September, is also an agreeable month in Flint, Michigan, with average temperature varying between 71.1°F (21.7°C) and 52.7°F (11.5°C).

Temperature

In September, the average high-temperature marginally drops, from a moderately hot 77.2°F (25.1°C) in August, to a pleasant 71.1°F (21.7°C). In September, the average low-temperature is 52.7°F (11.5°C).

Humidity

In Flint, the average relative humidity is 80%.

Rainfall

In Flint, it is raining for 11.3 days, with typically 0.87" (22mm) of accumulated precipitation. In Flint, Michigan, during the entire year, the rain falls for 124.4 days and collects up to 13.82" (351mm) of precipitation.

Snowfall

May through September are months without snowfall in Flint.

Daylight

In September, the average length of the day is 12.5h.

Sunshine

The average sunshine in Flint is 7.7h.

UV index

In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to the Sun's UV rays 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 Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the average humidity in September in Flint?

The average relative humidity in September in Flint is 80%.

How much does it rain in Flint in September?

In Flint, Michigan, in September, during 11.3 rainfall days, 0.87" (22mm) of precipitation is typically accumulated.

When it does not snow in Flint?

In Flint, Michigan, snow does not fall in May through September.

Does it snow in Flint in September?

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

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

In Flint, the average length of the day in September is 12.5h.

How many hours of sunshine does Flint have in September?

In September, the average sunshine in Flint, Michigan, is 7.7h.

What is the UV index reading in September in Flint?

In Flint, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health risk from unsafe exposure to the Sun's UV rays.

Average temperature in September
Flint, MI

Average temperature in September - Flint, MI
  • Average high temperature in September: 71.1°F

The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (27.1°F).

  • Average low temperature in September: 52.7°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).

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Average pressure in September
Flint, MI

Average pressure in September - Flint, MI
  • Average pressure in September: 30.03"

The month with the highest atmospheric pressure is March (30.09").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in September
Flint, MI

Average wind speed in September - Flint, MI
  • Average wind speed in September: 7.3mph

The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).

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Average humidity in September
Flint, MI

Average humidity in September - Flint, MI
  • Average humidity in September: 80%

Months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is April (77%).

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Average rainfall in September
Flint, MI

Average rainfall in September - Flint, MI
  • Average rainfall in September: 0.87"

The wettest month (with the highest rainfall) is May (1.97").
The driest months (with the least rainfall) are February and December (0.67").

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Average rainfall days in September
Flint, MI

Average rainfall days in September - Flint, MI
  • Average rainfall days in September: 11.3 days

The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is February (3.9 days).

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Average snowfall in September
Flint, MI

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

The month with the highest snowfall is February (2.56").
Months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Flint, MI

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

The month with the highest number of snowfall days is January (13.8 days).
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
Flint, MI

Average daylight in September / Average sunshine in September - Flint, MI
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in September: 7.7h

The month with the most sunshine is July (Average sunshine: 10.1h).
The month with the least sunshine is January (Average sunshine: 2.7h).

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Average sunshine days in September
Flint, MI

Average sunshine days in September - Flint, MI
  • Average sunshine days in September: 16.9 days

The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is May (12 days).

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Average UV index in September
Flint, MI

Average UV index in September - Flint, MI
  • Average UV index in September: 3

Months with the highest UV index are May, June, July and August (UV index 5).
Months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in September
Flint, MI

Average cloud cover in September - Flint, MI
  • Average cloud cover in September: 38

The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is July (Cloud cover 32).

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Average visibility in September
Flint, MI

Average visibility in September - Flint, MI
  • Average visibility in September: 5mi

Months with the highest visibility are March, April, May, June, July, August, October, November and December (6mi).
Months with the lowest visibility are January, February and September (5mi).

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