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 arrival of September is marked by an average high-temperature of a still warm 77.9°F (25.5°C), bearing a close resemblance to August. Throughout September, an average low-temperature of 59.4°F (15.2°C) is experienced.Humidity
In Hettick, the average relative humidity in September is 75%.Rainfall
In Hettick, Illinois, during September, the rain falls for 11.5 days and regularly aggregates up to 1.73" (44mm) of precipitation. Throughout the year, there are 138.2 rainfall days, and 23.31" (592mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In Hettick, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:29 am and sunset at 7:30 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:43 pm CDT.
Sunshine
The average sunshine in September in Hettick is 9.4h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 5 in September converts into the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Hettick?
What is the average humidity in September in Hettick?
How much does it rain in Hettick in September?
When it does not snow in Hettick?
What is the average length of the day in September in Hettick?
What time are sunrise and sunset in September in Hettick?
How long on average sun shines in September in Hettick?
What is the UV index reading in September in Hettick?
Average temperature in September
Hettick, IL
- Average high temperature in September: 77.9°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (34.9°F).
- Average low temperature in September: 59.4°F
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in September
Hettick, IL
- Average pressure in September: 30.02"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
Hettick, IL
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in September
Hettick, IL
- Average humidity in September: 75%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Hettick, IL
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is June (3.07").
The driest months (with the least rainfall) are January and February (1.22").
Average rainfall days in September
Hettick, IL
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in September
Hettick, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Hettick, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.3 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
Hettick, 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 30min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in September
Hettick, IL
- Average sunshine days in September: 16 days
The month with the most sunshine days is October (19.8 days).
The month with the least sunshine days is May (11.1 days).
Average UV index in September
Hettick, 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
Hettick, IL
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are August and September (Cloud cover 29).
Average visibility in September
Hettick, IL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Hettick, Illinois, USA
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