September weather forecastMorris, IL
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Morris, Illinois, with an average temperature fluctuating between 74.7°F (23.7°C) and 56.7°F (13.7°C).Temperature
With the transition into September, Morris notes an average high-temperature of a still warm 74.7°F (23.7°C), closely resembling August. An average low-temperature of 56.7°F (13.7°C) marks the month of September.Humidity
In Morris, the average relative humidity in September is 78%.Rainfall
In September, the rain falls for 13.7 days. Throughout September, 2.64" (67mm) of precipitation is accumulated. Throughout the year, there are 167.3 rainfall days, and 35.83" (910mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In Morris, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:20 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:36 pm CDT.
Sunshine
The average sunshine in September is 8.7h.UV index
In Morris, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Morris, IL
- Average high temperature in September: 74.7°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in September: 56.7°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in September
Morris, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Morris, IL
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
Morris, IL
- Average humidity in September: 78%
The months with the highest relative humidity are July and August (84%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Morris, IL
- Average rainfall in September: 2.64"
The wettest month (with the highest rainfall) is May (4.96").
The driest month (with the least rainfall) is November (1.73").
Average rainfall days in September
Morris, IL
- Average rainfall days in September: 13.7 days
The month with the highest number of rainy days is July (20 days).
The month with the least rainy days is February (6.2 days).
Average snowfall in September
Morris, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.8").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Morris, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Morris, IL
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 42min
The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in September
Morris, IL
- Average sunshine days in September: 13.3 days
The month with the most sunshine days is November (16.6 days).
The month with the least sunshine days is July (7.3 days).
Average UV index in September
Morris, IL
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Morris, IL
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are August and September (Cloud cover 33).
Average visibility in September
Morris, IL
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
