September weather forecast and climate
Corunna, MI

Weather in September

September, the first month of the autumn, in Corunna, is also an agreeable month, with average temperature ranging between min 52.7°F (11.5°C) and max 71.2°F (21.8°C).

Temperature

In September, the average high-temperature slightly decreases, from a warm 77.5°F (25.3°C) in August, to an agreeable 71.2°F (21.8°C). In Corunna, in September, the average low-temperature is 52.7°F (11.5°C).

Humidity

In September, the average relative humidity is 79%.

Rainfall

In Corunna, during September, the rain falls for 12.4 days and regularly aggregates up to 1.38" (35mm) of precipitation. In Corunna, during the entire year, the rain falls for 137.7 days and collects up to 21.3" (541mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

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

Sunshine

In September, the average sunshine is 7.7h.

UV index

The average daily maximum UV index in Corunna is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 3 in September transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Corunna?

In September, the average high-temperature is 71.2°F (21.8°C), and the average low-temperature is 52.7°F (11.5°C).

What is the average humidity in September in Corunna?

In September, the average relative humidity is 79%.

How much does it rain in Corunna in September?

In Corunna, during September, the rain falls for 12.4 days and regularly aggregates up to 1.38" (35mm) of precipitation.

Does it snow in Corunna in September?

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

When it does not snow in Corunna?

May through September are months without snowfall in Corunna.

How many hours of daylight does Corunna have in September?

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

How many hours of sunshine does Corunna have in September?

The average sunshine in September in Corunna is 7.7h.

What is the UV index intensity in September in Corunna?

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

Average temperature in September
Corunna, MI

Average temperature in September - Corunna, MI
  • Average high temperature in September: 71.2°F

The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (27°F).

  • Average low temperature in September: 52.7°F

The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (16.3°F).

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Average pressure in September
Corunna, MI

Average pressure in September - Corunna, 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 (29.92").

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Average wind speed in September
Corunna, MI

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

The windiest month (with the highest average wind speed) is February (10mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

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Average humidity in September
Corunna, MI

Average humidity in September - Corunna, MI
  • Average humidity in September: 79%

The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (77%).

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Average rainfall in September
Corunna, MI

Average rainfall in September - Corunna, MI
  • Average rainfall in September: 1.38"

The wettest month (with the highest rainfall) is May (2.52").
The driest months (with the least rainfall) are March, November and December (1.18").

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Average rainfall days in September
Corunna, MI

Average rainfall days in September - Corunna, MI
  • Average rainfall days in September: 12.4 days

The month with the highest number of rainy days is May (16.1 days).
The month with the least rainy days is February (5 days).

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Average snowfall in September
Corunna, MI

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

The month with the highest snowfall is February (4.57").
Months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Corunna, MI

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

The month with the highest number of snowfall days is January (17.2 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
Corunna, MI

Average daylight in September / Average sunshine in September - Corunna, 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: 10.2h).
The month with the least sunshine is January (Average sunshine: 2.6h).

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Average sunshine days in September
Corunna, MI

Average sunshine days in September - Corunna, MI
  • Average sunshine days in September: 15.4 days

The month with the most sunshine days is September (15.4 days).
The month with the least sunshine days is February (9.7 days).

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Average UV index in September
Corunna, MI

Average UV index in September - Corunna, 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
Corunna, MI

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

The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 32).

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Average visibility in September
Corunna, MI

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

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

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