September weather forecastHolcomb, IL
September
Weather in September
September, the first month of the autumn in Holcomb, is also a moderately hot month, with an average temperature varying between 54.5°F (12.5°C) and 73.4°F (23°C).Temperature
A minor adjustment in Holcomb's average high-temperature is noted with the start of September, touching a still moderately hot 73.4°F (23°C) from August's 78.3°F (25.7°C). The low-temperature average for Holcomb during September stands at a cool 54.5°F (12.5°C).Humidity
The average relative humidity in September is 79%.Rainfall
In Holcomb, during September, the rain falls for 10.1 days and regularly aggregates up to 1.14" (29mm) of precipitation. Throughout the year, there are 124.5 rainfall days, and 14.49" (368mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In Holcomb, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:22 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 6:39 pm CDT.
Sunshine
In Holcomb, the average sunshine in September is 8.6h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Adopt protective measures - Suggestions to resist sunburn are offered. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. 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
Average temperature in September
Holcomb, IL
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in September: 54.5°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14.7°F).
Average pressure in September
Holcomb, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Holcomb, IL
- Average wind speed in September: 7.4mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in September
Holcomb, IL
- Average humidity in September: 79%
The months with the highest relative humidity are January and July (85%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Holcomb, IL
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is June (2.13").
The driest month (with the least rainfall) is February (0.55").
Average rainfall days in September
Holcomb, IL
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is June (16 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in September
Holcomb, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Holcomb, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.3 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
Holcomb, IL
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 36min
The month with the most sunshine is June (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in September
Holcomb, IL
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in September
Holcomb, IL
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Holcomb, IL
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 34).
Average visibility in September
Holcomb, IL
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
