September weather forecastKoleen, IN
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Koleen, Indiana, with temperature in the range of an average low of 58.6°F (14.8°C) and an average high of 77.7°F (25.4°C).Temperature
September heralds a minor drop in average high-temperature, sliding from August's moderately hot 83.1°F (28.4°C) to a still warm 77.7°F (25.4°C). Throughout the month of September, the nighttime temperature in Koleen, Indiana, dips to an average of 58.6°F (14.8°C).Humidity
In Koleen, the average relative humidity in September is 76%.Rainfall
The months with the least rainfall are September and October Rain falls for 11.6 days and accumulates 1.69" (43mm) of rain.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 7:16 am and sunset at 8:17 pm. On the last day of September, in Koleen, sunrise is at 7:43 am and sunset at 7:31 pm EDT.
Sunshine
In Koleen, the average sunshine in September is 8.4h.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 ordinary person.Note: The UV index of 5 during September translates into the following guidance:
Make use of precautions - It is urged to ward off sun damage. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Koleen, IN
- Average high temperature in September: 77.7°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in September: 58.6°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (23°F).
Average pressure in September
Koleen, IN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Koleen, IN
- Average wind speed in September: 6.2mph
The windiest months (with the highest average wind speed) are January and February (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in September
Koleen, IN
- Average humidity in September: 76%
The month with the highest relative humidity is May (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Koleen, IN
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is April (3.39").
The driest months (with the least rainfall) are September and October (1.69").
Average rainfall days in September
Koleen, IN
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is January (9 days).
Average snowfall in September
Koleen, IN
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Koleen, IN
- 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
Koleen, IN
- Average daylight in September: 12h and 24min
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: 8h and 24min
The months with the most sunshine are June and July (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 4h and 12min).
Average sunshine days in September
Koleen, IN
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is May (10 days).
Average UV index in September
Koleen, IN
- Average UV index in September: 5
The months with the highest UV index are May, 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
Koleen, IN
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Koleen, IN
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, September, October, November and December (6mi).
The months with the lowest visibility are May, July and August (5mi).
