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
Koontz Lake experiences a minor change to a still warm 73.4°F (23°C) in average high-temperature during September, closely reflecting August. September nights in Koontz Lake experience a consistent temperature drop to a fresh 55.2°F (12.9°C).Humidity
The average relative humidity in September is 80%.Rainfall
In Koontz Lake, during September, the rain falls for 12.1 days and regularly aggregates up to 1.3" (33mm) of precipitation. In Koontz Lake, during the entire year, the rain falls for 138.6 days and collects up to 18.43" (468mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September in Koontz Lake is 12h and 28min.On the first day of the month, sunrise is at 6:12 am and sunset at 7:18 pm. On the last day of September, in Koontz Lake, sunrise is at 6:42 am and sunset at 6:28 pm CDT.
Sunshine
In Koontz Lake, the average sunshine in September is 7.9h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 4 translates into these guidelines:
Take precautions - Protection against sunburn is recommended. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Koontz Lake?
What is the average humidity in September in Koontz Lake?
How many days does it rain in September in Koontz Lake?
When it does not snow in Koontz Lake?
Does it snow in Koontz Lake in September?
What is the average length of the day in September in Koontz Lake?
When are sunrise and sunset in September in Koontz Lake?
How many hours of sunshine does Koontz Lake have in September?
What is the UV index intensity in September in Koontz Lake?
Average temperature in September
Koontz Lake, IN
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in September: 55.2°F
The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in September
Koontz Lake, IN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Koontz Lake, IN
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
Koontz Lake, IN
- Average humidity in September: 80%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (75%).
Average rainfall in September
Koontz Lake, IN
- Average rainfall in September: 1.3"
The wettest month (with the highest rainfall) is June (2.68").
The driest months (with the least rainfall) are January, February and December (0.91").
Average rainfall days in September
Koontz Lake, IN
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (4.9 days).
Average snowfall in September
Koontz Lake, IN
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.91").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Koontz Lake, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Koontz Lake, IN
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 7h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in September
Koontz Lake, IN
- Average sunshine days in September: 15.2 days
The month with the most sunshine days is November (15.7 days).
The month with the least sunshine days is February (11.3 days).
Average UV index in September
Koontz Lake, IN
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Koontz Lake, IN
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 69).
The months with the least cloud cover are July and August (Cloud cover 35).
Average visibility in September
Koontz Lake, IN
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
Koontz Lake, Indiana, USA
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