September weather forecastDunn Mill, IN
September
Weather in September
September, the first month of the autumn in Dunn Mill, is also an agreeable month, with an average temperature varying between 55.2°F (12.9°C) and 73°F (22.8°C).Temperature
During the shift to September, a minor reduction in average high-temperature is observed, shifting from a moderately hot 78.6°F (25.9°C) in August to an agreeable 73°F (22.8°C). Dunn Mill, during the nights of September, experiences an average temperature drop to a fresh 55.2°F (12.9°C).Humidity
In September, the average relative humidity in Dunn Mill, Indiana, is 79%.Rainfall
In Dunn Mill, during September, the rain falls for 10.9 days and regularly aggregates up to 0.91" (23mm) of precipitation. In Dunn Mill, during the entire year, the rain falls for 125.3 days and collects up to 13.11" (333mm) of precipitation.Snowfall
May through September are months without snowfall in Dunn Mill.Daylight
The average length of the day in September in Dunn Mill is 12h and 28min.On the first day of September in Dunn Mill, sunrise is at 7:08 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 7:24 pm EDT.
Sunshine
In Dunn Mill, the average sunshine in September is 8h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Dunn Mill, IN
- Average high temperature in September: 73°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (30.2°F).
- Average low temperature in September: 55.2°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in September
Dunn Mill, IN
- Average pressure in September: 30.04"Hg
The months with the highest atmospheric pressure are January and November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Dunn Mill, IN
- Average wind speed in September: 7mph
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
Dunn Mill, IN
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (85%).
The month with the lowest relative humidity is October (76%).
Average rainfall in September
Dunn Mill, IN
- Average rainfall in September: 0.91"
The wettest month (with the highest rainfall) is May (1.69").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in September
Dunn Mill, IN
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in September
Dunn Mill, IN
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.69").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Dunn Mill, 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 June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Dunn Mill, IN
- Average daylight in September: 12h and 30min
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 18min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).
Average sunshine days in September
Dunn Mill, IN
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is January (19.2 days).
The month with the least sunshine days is July (12 days).
Average UV index in September
Dunn Mill, IN
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Dunn Mill, IN
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in September
Dunn Mill, IN
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
