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
The average high-temperature in September, at an enjoyable 67.1°F (19.5°C), reveals a modest deviation from August's 72.1°F (22.3°C). Registering an almost steady temperature, Custer's nights in September see an average low of 58.3°F (14.6°C).Humidity
The average relative humidity in September in Custer, Michigan, is 77%.Rainfall
In Custer, in September, during 9.6 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. In Custer, Michigan, during the entire year, the rain falls for 96.6 days and collects up to 8.58" (218mm) of precipitation.Snowfall
In Custer, snow does not fall in May through September.Daylight
In Custer, the average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 7:09 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 7:27 pm EDT.
Sunshine
The average sunshine in September is 8.2h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, an average UV index of 4 transforms into the following instructions:
Exercise prevention - Precautions against solar damage are endorsed. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Custer?
What is the average humidity in September in Custer?
How much does it rain in Custer in September?
When it does not snow in Custer?
Does it snow in Custer in September?
What is the average length of the day in September in Custer?
When are sunrise and sunset in September in Custer?
How long on average sun shines in September in Custer?
How high is the UV index in September in Custer?
Average temperature in September
Custer, MI
- Average high temperature in September: 67.1°F
The warmest month (with the highest average high temperature) is August (72.1°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in September: 58.3°F
The month with the highest average low temperature is August (64.4°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure in September
Custer, MI
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Custer, MI
- Average wind speed in September: 11.4mph
The windiest month (with the highest average wind speed) is November (14.3mph).
The calmest month (with the lowest average wind speed) is July (9.1mph).
Average humidity in September
Custer, MI
- Average humidity in September: 77%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (76%).
Average rainfall in September
Custer, MI
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is October (1.3").
The driest month (with the least rainfall) is February (0.39").
Average rainfall days in September
Custer, MI
- Average rainfall days in September: 9.6 days
The month with the highest number of rainy days is October (12.3 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in September
Custer, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.34").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Custer, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Custer, MI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 0min).
Average sunshine days in September
Custer, MI
- Average sunshine days in September: 18 days
The month with the most sunshine days is March (18.8 days).
The month with the least sunshine days is October (15.3 days).
Average UV index in September
Custer, MI
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Custer, MI
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 81).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in September
Custer, 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).
Custer, Michigan, USA
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