September weather forecast
Dearborn, MI

Share

Weather in September

September brings a visible change in weather in Dearborn, Michigan, as temperatures start to drop, paving the way for the autumn season. With a high temperature of approximately 72.3°F (22.4°C), this month marks a significant drop from the scorching summer of August. Interestingly, there is a decline in daylight hours and an increase in cloud coverage from August, a clear indication of the approaching fall season. The weather in September is generally cooler and cloudier than the summer months but warmer than what awaits in the following months.

Temperature

A mild drop in Dearborn's average high-temperature is observed in September, transitioning from a warm 78.8°F (26°C) in August to an agreeable 72.3°F (22.4°C). In September, the temperature drops to an average of 57.2°F (14°C) at night.

Humidity

In September, the average relative humidity in Dearborn, Michigan, is 75%.

Rainfall

In Dearborn, in September, during 13.2 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. In Dearborn, during the entire year, the rain falls for 140.2 days and collects up to 17.56" (446mm) of precipitation.

Snowfall

In Dearborn, snow does not fall in June through October.

Daylight

In Dearborn, the average length of the day in September is 12h and 28min.
On the first day of September, sunrise is at 6:58 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 7:15 pm EDT.

Sunshine

The average sunshine in September is 8.3h.

UV index

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum UV index, 4 during September, leads to the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
[Resources]

Frequently asked questions

What is the temperature in September in Dearborn?

The average high-temperature, in September, in Dearborn, is 72.3°F (22.4°C), while the average low-temperature is 57.2°F (14°C).

What is the average humidity in September in Dearborn?

In Dearborn, Michigan, the average relative humidity in September is 75%.

How many days does it rain in September in Dearborn?

In Dearborn, during September, the rain falls for 13.2 days and regularly aggregates up to 1.38" (35mm) of precipitation.

When it does not snow in Dearborn?

June through October are months without snowfall in Dearborn, Michigan.

How many hours of daylight does Dearborn have in September?

In September, the average day length in Dearborn, Michigan, is 12h and 28min.

What time are sunrise and sunset in September in Dearborn?

On the first day of September in Dearborn, Michigan, sunrise is at 6:58 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 7:15 pm EDT.

How long on average sun shines in September in Dearborn?

In September, the average sunshine duration in Dearborn is 8.3h.

How high is the UV index in September in Dearborn?

The average daily maximum UV index in September in Dearborn is 4. A UV Index value of 3 to 5 symbolizes a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Dearborn, MI

Average temperature in September - Dearborn, MI
  • Average high temperature in September: 72.3°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (28.9°F).

  • Average low temperature in September: 57.2°F

The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (19.2°F).

[Resources]

Average pressure in September
Dearborn, MI

Average pressure in September - Dearborn, MI
  • Average pressure in September: 30.04"Hg

The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

[Resources]

Average wind speed in September
Dearborn, MI

Average wind speed in September - Dearborn, MI
  • Average wind speed in September: 7.7mph

The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

[Resources]

Average humidity in September
Dearborn, MI

Average humidity in September - Dearborn, MI
  • Average humidity in September: 75%

The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are July and August (73%).

[Resources]

Average rainfall in September
Dearborn, MI

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

The wettest month (with the highest rainfall) is May (2.2").
The driest months (with the least rainfall) are January and February (0.87").

[Resources]

Average rainfall days in September
Dearborn, MI

Average rainfall days in September - Dearborn, MI
  • Average rainfall days in September: 13.2 days

The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is February (5.8 days).

[Resources]

Average snowfall in September
Dearborn, MI

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

The month with the highest snowfall is February (2.95").
The months with the least snowfall are June, July, August, September and October (0").

[Resources]

Average snowfall days in September
Dearborn, MI

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

The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

[Resources]

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

Average daylight in September / Average sunshine in September - Dearborn, MI
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in September: 8h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).

[Resources]

Average sunshine days in September
Dearborn, MI

Average sunshine days in September - Dearborn, MI
  • Average sunshine days in September: 14.6 days

The month with the most sunshine days is October (16.8 days).
The month with the least sunshine days is July (11.8 days).

[Resources]

Average UV index in September
Dearborn, MI

Average UV index in September - Dearborn, MI
  • Average UV index in September: 4

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).

[Resources]

Average cloud cover in September
Dearborn, MI

Average cloud cover in September - Dearborn, MI
  • Average cloud cover in September: 31

The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is July (Cloud cover 27).

[Resources]

Average visibility in September
Dearborn, MI

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

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

[Resources]

Dearborn, Michigan, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location