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
A minor adjustment in Tolono's average high-temperature is noted with the start of September, touching a still moderately hot 76.5°F (24.7°C) from August's 81.1°F (27.3°C). During September, Tolono's temperature averages to a moderate 58.3°F (14.6°C) at night.Humidity
In Tolono, Illinois, the average relative humidity in September is 76%.Rainfall
September is the month with the least rainfall. Rain falls for 11.5 days and accumulates 1.18" (30mm) of precipitation.Snowfall
In Tolono, Illinois, snow does not fall in May through October.Daylight
In Tolono, Illinois, the average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 6:21 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:36 pm CDT.
Sunshine
The average sunshine in September in Tolono is 8.9h.UV index
The average daily maximum UV index in September in Tolono is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index of 5 during September leads to these instructions:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 are the temperatures in Tolono in September?
What is the average humidity in September in Tolono?
What is the driest month in Tolono?
How much does it rain in Tolono in September?
When it does not snow in Tolono?
What is the average length of the day in September in Tolono?
When is the sunrise / sunset in September in Tolono?
How long on average sun shines in September in Tolono?
What is the UV index intensity in September in Tolono?
Average temperature in September
Tolono, IL
- Average high temperature in September: 76.5°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (32.2°F).
- Average low temperature in September: 58.3°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in September
Tolono, 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 (29.92"Hg).
Average wind speed in September
Tolono, IL
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (6.4mph).
Average humidity in September
Tolono, IL
- Average humidity in September: 76%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Tolono, IL
- Average rainfall in September: 1.18"
The wettest month (with the highest rainfall) is May (2.8").
The driest month (with the least rainfall) is September (1.18").
Average rainfall days in September
Tolono, IL
- Average rainfall days in September: 11.5 days
The months with the highest number of rainy days are May and July (16.8 days).
The month with the least rainy days is February (6.2 days).
Average snowfall in September
Tolono, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.56").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Tolono, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.4 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
Tolono, 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 24min).
- Average sunshine in September: 8h and 5min
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
Tolono, IL
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in September
Tolono, 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
Tolono, IL
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are June, August and September (Cloud cover 32).
Average visibility in September
Tolono, 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).
Tolono, Illinois, USA
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