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
Assumption's September reports an average high-temperature of a still warm 77.2°F (25.1°C), exhibiting a minor difference from August. In Assumption, an average temperature of 58.5°F (14.7°C) is noted during September nights.Humidity
The average relative humidity in September in Assumption is 75%.Rainfall
In Assumption, in September, during 11.5 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. In Assumption, during the entire year, the rain falls for 139.6 days and collects up to 24.25" (616mm) of precipitation.Snowfall
In Assumption, snow does not fall in April through October.Daylight
In September, the average length of the day in Assumption is 12h and 26min.On the first day of the month, sunrise is at 6:25 am and sunset at 7:26 pm. On the last day of September, sunrise is at 6:52 am and sunset at 6:39 pm CDT.
Sunshine
The average sunshine in September in Assumption, Illinois, is 9.1h.UV index
The average daily maximum UV index in September in Assumption is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: In September, an average UV index of 5 transforms into the following instructions:
Exercise care. People with light skin might get burns in fewer than 30 minutes. The Sun's radiation is especially intense around midday; try to stay in shade during this period. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Assumption?
What is the average humidity in September in Assumption?
How many days does it rain in September in Assumption?
When it does not snow in Assumption?
What is the average length of the day in September in Assumption?
When are sunrise and sunset in September in Assumption?
How many hours of sunshine does Assumption have in September?
What is the UV index reading in September in Assumption?
Average temperature in September
Assumption, IL
- Average high temperature in September: 77.2°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in September: 58.5°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in September
Assumption, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Assumption, IL
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).
Average humidity in September
Assumption, IL
- Average humidity in September: 75%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Assumption, IL
- Average rainfall in September: 1.5"
The wettest months (with the highest rainfall) are April and May (2.91").
The driest months (with the least rainfall) are February and December (1.38").
Average rainfall days in September
Assumption, IL
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (6.9 days).
Average snowfall in September
Assumption, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.8").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Assumption, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Assumption, IL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Assumption, IL
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is October (19.7 days).
The month with the least sunshine days is May (11.6 days).
Average UV index in September
Assumption, IL
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Assumption, IL
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are June and September (Cloud cover 30).
Average visibility in September
Assumption, 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).
Assumption, Illinois, USA
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