September weather forecastHarrisville, MI
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Harrisville, Michigan, with an average temperature fluctuating between 55.4°F (13°C) and 68°F (20°C).Temperature
The commencement of September includes a gentle temperature shift, with the average high-temperature dropping a bit from a warm 74.5°F (23.6°C) in August to an agreeable 68°F (20°C). An average low-temperature of 55.4°F (13°C) is noted during the nights in September.Humidity
The average relative humidity in September is 77%.Rainfall
September is the month with the least rainfall. Rain falls for 11.6 days and accumulates 1.18" (30mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Harrisville, the average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:56 am and sunset at 8:09 pm. On the last day of September, sunrise is at 7:30 am and sunset at 7:15 pm EDT.
Sunshine
In Harrisville, the average sunshine in September is 8.2h.UV index
The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 3 in September converts into the following recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Harrisville, MI
- Average high temperature in September: 68°F
The warmest month (with the highest average high temperature) is July (75°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in September: 55.4°F
The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in September
Harrisville, MI
- Average pressure in September: 30.02"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
Harrisville, MI
- Average wind speed in September: 8.8mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.3mph).
Average humidity in September
Harrisville, MI
- Average humidity in September: 77%
The months with the highest relative humidity are January and February (85%).
The month with the lowest relative humidity is May (74%).
Average rainfall in September
Harrisville, MI
- Average rainfall in September: 1.18"
The wettest month (with the highest rainfall) is May (2.64").
The driest month (with the least rainfall) is September (1.18").
Average rainfall days in September
Harrisville, MI
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is October (16.5 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in September
Harrisville, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Harrisville, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (18.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Harrisville, MI
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 12min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 12min).
Average sunshine days in September
Harrisville, MI
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is May (15.8 days).
The month with the least sunshine days is January (8.7 days).
Average UV index in September
Harrisville, MI
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in September
Harrisville, MI
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 76).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in September
Harrisville, MI
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
