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
Chatham experiences an average high-temperature of a refreshing 64°F (17.8°C) in September, subtly different from August's 69.1°F (20.6°C). During September, Chatham witnesses a consistent average low-temperature of 52.7°F (11.5°C).Humidity
The average relative humidity in September is 80%.Rainfall
In Chatham, in September, it is raining for 13.5 days, with typically 2.17" (55mm) of accumulated precipitation. Throughout the year, there are 122.5 rainfall days, and 21.89" (556mm) of precipitation is accumulated.Snowfall
In Chatham, snow does not fall in June through September.Daylight
In Chatham, Michigan, the average length of the day in September is 12h and 32min.On the first day of September in Chatham, sunrise is at 7:09 am and sunset at 8:25 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 7:28 pm EDT.
Sunshine
The average sunshine in September is 7.5h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. Direct Sun exposure should be minimized especially during midday when radiation is most intense. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
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?
Does it snow in September?
How many hours of daylight does Chatham have in September?
When is the sunrise / sunset in September in Chatham?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Chatham, MI
- Average high temperature in September: 64°F
The warmest month (with the highest average high temperature) is August (69.1°F).
The month with the lowest average high temperature is January (23.7°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is August (57.7°F).
The coldest month (with the lowest average low temperature) is February (16.2°F).
Average pressure in September
Chatham, MI
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is March (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Chatham, MI
- Average wind speed in September: 10.1mph
The windiest month (with the highest average wind speed) is January (12.7mph).
The calmest month (with the lowest average wind speed) is July (8mph).
Average humidity in September
Chatham, MI
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is May (76%).
Average rainfall in September
Chatham, MI
- Average rainfall in September: 2.17"
The wettest month (with the highest rainfall) is October (2.56").
The driest month (with the least rainfall) is January (1.26").
Average rainfall days in September
Chatham, MI
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is October (14.6 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in September
Chatham, MI
- Average snowfall in September: 0"
The month with the highest snowfall is December (6.14").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Chatham, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (20.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Chatham, MI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 7h and 3min
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).
Average sunshine days in September
Chatham, MI
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is August (16.3 days).
The month with the least sunshine days is January (6.4 days).
Average UV index in September
Chatham, MI
- Average UV index in September: 4
The months with the highest UV index are July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in September
Chatham, MI
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 82).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Chatham, MI
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Chatham, Michigan, USA
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