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
September marks a gentle change in average high-temperature, declining from August's 82.9°F (28.3°C) to a still moderately hot 77.5°F (25.3°C). During the nights in September, an average low-temperature of 58.1°F (14.5°C) is observed in Columbus.Humidity
The average relative humidity in September in Columbus is 75%.Rainfall
In Columbus, in September, it is raining for 10.4 days, with typically 2.4" (61mm) of accumulated precipitation. In Columbus, during the entire year, the rain falls for 134.2 days and collects up to 23.15" (588mm) of precipitation.Snowfall
In Columbus, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:35 pm. On the last day of September, in Columbus, sunrise is at 7:00 am and sunset at 6:48 pm CDT.
Sunshine
In September, the average sunshine in Columbus is 9.4h.UV index
In Columbus, Illinois, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index, 5 in September, converts into the following recommendations:
Be vigilant - Preventing sunburn is recommended. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Experience reduced UV exposure by about half when donning a wide-brim hat.
Frequently asked questions
What are September temperatures in Columbus?
What is the average humidity in September in Columbus?
How many days does it rain in September in Columbus?
When it does not snow in Columbus?
Does it snow in Columbus in September?
How many hours of daylight does Columbus have in September?
What time are sunrise and sunset in September in Columbus?
How many hours of sunshine does Columbus have in September?
What is the UV index reading in September in Columbus?
Average temperature in September
Columbus, IL
- Average high temperature in September: 77.5°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 (32.7°F).
- Average low temperature in September: 58.1°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in September
Columbus, 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 (29.91"Hg).
Average wind speed in September
Columbus, IL
- Average wind speed in September: 7.2mph
The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).
Average humidity in September
Columbus, IL
- Average humidity in September: 75%
The months with the highest relative humidity are June and July (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Columbus, IL
- Average rainfall in September: 2.4"
The wettest month (with the highest rainfall) is May (3.35").
The driest months (with the least rainfall) are January and December (1.02").
Average rainfall days in September
Columbus, IL
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (5 days).
Average snowfall in September
Columbus, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.76").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Columbus, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.8 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
Columbus, 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: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in September
Columbus, IL
- Average sunshine days in September: 18.1 days
The month with the most sunshine days is December (19.6 days).
The month with the least sunshine days is June (11.1 days).
Average UV index in September
Columbus, 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
Columbus, IL
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in September
Columbus, 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).
Columbus, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location
