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
As August transitions into September, Dearborn sees a gentle drop in the average high-temperature, transitioning from a warm 78.8°F (26°C) to a pleasant 72.3°F (22.4°C). The month of September records an average low-temperature of 57.2°F (14°C) in Dearborn.Humidity
The average relative humidity in September is 75%.Rainfall
In Dearborn, during September, the rain falls for 13.2 days and regularly aggregates up to 1.38" (35mm) of precipitation. 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
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
In September, the average sunshine is 8.3h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
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 in Dearborn?
How many hours of daylight does Dearborn have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Dearborn have in September?
How high is the UV index in September?
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).
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).
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).
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%).
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").
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).
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").
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).
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).
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).
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).
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).
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).
Dearborn, Michigan, USA
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