September weather forecastHenderson, MI
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Henderson, Michigan, with an average temperature ranging between min 52.7°F (11.5°C) and max 71.2°F (21.8°C).Temperature
The shift from August to September coincides with a small decrease in the average high-temperature, down to an agreeable 71.2°F (21.8°C) from a moderately hot 77.5°F (25.3°C). During the nights in September, Henderson observes an average low-temperature of 52.7°F (11.5°C).Humidity
In Henderson, the average relative humidity in September is 79%.Rainfall
In Henderson, during September, the rain falls for 12.4 days and regularly aggregates up to 1.38" (35mm) of precipitation. Throughout the year, there are 137.7 rainfall days, and 21.3" (541mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 29min.On the first day of September, sunrise is at 7:01 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 7:19 pm EDT.
Sunshine
In Henderson, the average sunshine in September is 7.7h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index of 3 during September translates into these guidelines:
Prioritize safety - Recommendations to avert sunburn are shared. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Henderson, 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).
Average pressure in September
Henderson, MI
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Henderson, 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).
Average humidity in September
Henderson, 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%).
Average rainfall in September
Henderson, 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").
Average rainfall days in September
Henderson, 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).
Average snowfall in September
Henderson, MI
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.57").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Henderson, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (17.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Henderson, MI
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 7h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in September
Henderson, 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).
Average UV index in September
Henderson, MI
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Henderson, 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).
Average visibility in September
Henderson, MI
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, July, October and November (6mi).
The months with the lowest visibility are January, February, August, September and December (5mi).
