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 advent of September denotes an average high-temperature of a still moderately hot 76.1°F (24.5°C), subtly different from August's 80.8°F (27.1°C). Morton reports an average low-temperature of 57.2°F (14°C) during the nights of September.Humidity
In Morton, the average relative humidity in September is 76%.Rainfall
In September, the rain falls for 10.7 days. Throughout September, 1.34" (34mm) of precipitation is accumulated. Throughout the year, there are 127.2 rainfall days, and 16.77" (426mm) of precipitation is accumulated.Snowfall
In Morton, snow does not fall in May through October.Daylight
In Morton, the average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 6:25 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:41 pm CDT.
Sunshine
The average sunshine in September is 9.1h.UV index
In Morton, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: An average maximum UV index of 5 in September leads to these recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. 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 are the temperatures in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Morton have in September?
How high is the UV index in September?
Average temperature in September
Morton, IL
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in September: 57.2°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in September
Morton, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Morton, IL
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in September
Morton, IL
- Average humidity in September: 76%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Morton, IL
- Average rainfall in September: 1.34"
The wettest month (with the highest rainfall) is May (2.48").
The driest months (with the least rainfall) are February and December (0.83").
Average rainfall days in September
Morton, IL
- Average rainfall days in September: 10.7 days
The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in September
Morton, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.24").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Morton, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.7 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
Morton, IL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in September
Morton, IL
- Average sunshine days in September: 17.8 days
The month with the most sunshine days is December (19.7 days).
The month with the least sunshine days is May (11.4 days).
Average UV index in September
Morton, IL
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Morton, IL
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in September
Morton, IL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Morton, Illinois, USA
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