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
September heralds a minor drop in average high-temperature, sliding from August's moderately hot 76.8°F (24.9°C) to a pleasant 70°F (21.1°C). Throughout September, an average low-temperature of 50.7°F (10.4°C) is experienced.Humidity
The average relative humidity in September is 79%.Rainfall
September is the month with the least rainfall. Rain falls for 11 days and accumulates 0.87" (22mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 30min.On the first day of the month, sunrise is at 7:03 am and sunset at 8:14 pm. On the last day of September, sunrise is at 7:36 am and sunset at 7:21 pm EDT.
Sunshine
The average sunshine in September is 7.9h.UV index
In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: During September, 3 as the daily maximum UV index converts into the following advice:
Be vigilant - Preventing sunburn is recommended. It's recommended to limit sun exposure when its radiation is at its peak during midday. 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
What is the average September temperature?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Harrison, MI
- Average high temperature in September: 70°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (24.8°F).
- Average low temperature in September: 50.7°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).
Average pressure in September
Harrison, 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 (29.92"Hg).
Average wind speed in September
Harrison, MI
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in September
Harrison, MI
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is April (74%).
Average rainfall in September
Harrison, MI
- Average rainfall in September: 0.87"
The wettest months (with the highest rainfall) are May and October (2.68").
The driest month (with the least rainfall) is September (0.87").
Average rainfall days in September
Harrison, MI
- Average rainfall days in September: 11 days
The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is February (3.6 days).
Average snowfall in September
Harrison, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (7.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Harrison, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (19.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Harrison, 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: 7h and 5min
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 6min).
Average sunshine days in September
Harrison, MI
- Average sunshine days in September: 16 days
The month with the most sunshine days is September (16 days).
The month with the least sunshine days is January (10.5 days).
Average UV index in September
Harrison, 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, November and December (UV index 1).
Average cloud cover in September
Harrison, MI
- Average cloud cover in September: 38
The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in September
Harrison, MI
- Average visibility in September: 5mi
The months with the highest visibility are April, May, June, July, October and November (6mi).
The month with the lowest visibility is January (4mi).
Harrison, Michigan, USA
Weather forecast for your location
2. Allow the app to use your location