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
Colfax greets September with an average high-temperature of a still moderately hot 75.7°F (24.3°C), marking a slight deviation from the preceding month. Throughout September, the average low-temperature records at a moderate 57.2°F (14°C).Humidity
In September, the average relative humidity is 76%.Rainfall
In Colfax, in September, it is raining for 10.1 days, with typically 1.14" (29mm) of accumulated precipitation. Throughout the year, there are 129.6 rainfall days, and 16.73" (425mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in Colfax.Daylight
In September, the average length of the day is 12h and 27min.On the first day of September, sunrise is at 6:22 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:37 pm CDT.
Sunshine
In September, the average sunshine is 9h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Heed the precautions - It is counselled to guard against solar damage. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Colfax?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow in Colfax?
How many hours of daylight does Colfax have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Colfax, IL
- Average high temperature in September: 75.7°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in September: 57.2°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in September
Colfax, 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
Colfax, IL
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in September
Colfax, 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 (71%).
Average rainfall in September
Colfax, IL
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is May (2.44").
The driest month (with the least rainfall) is January (0.79").
Average rainfall days in September
Colfax, IL
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in September
Colfax, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.09").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Colfax, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.9 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
Colfax, 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 0min
The month with the most sunshine is June (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Colfax, IL
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is November (20.3 days).
The month with the least sunshine days is May (11 days).
Average UV index in September
Colfax, IL
- Average UV index in September: 4
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
Colfax, IL
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 31).
Average visibility in September
Colfax, 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).
Colfax, Illinois, USA
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