September weather forecastDecker, IN
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Decker, Indiana, with an average temperature varying between 60.1°F (15.6°C) and 78.6°F (25.9°C).Temperature
With the advent of September, Decker experiences an average high-temperature of a still moderately hot 78.6°F (25.9°C), mirroring a close resemblance to the previous month. During September, Decker consistently records a temperature low averaging a refreshing 60.1°F (15.6°C).Humidity
The average relative humidity in September is 74%.Rainfall
September is the month with the least rainfall. Rain falls for 7 days and accumulates 0.28" (7mm) of precipitation.Snowfall
In Decker, snow does not fall in April through October.Daylight
The average length of the day in September in Decker is 12h and 25min.On the first day of September, sunrise is at 7:20 am and sunset at 8:19 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 7:33 pm EDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: A typical high UV index of 5 in September suggests the following recommendations:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Decker, IN
- Average high temperature in September: 78.6°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in September: 60.1°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (24.4°F).
Average pressure in September
Decker, IN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Decker, IN
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is February (10mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in September
Decker, IN
- Average humidity in September: 74%
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Decker, IN
- Average rainfall in September: 0.28"
The wettest month (with the highest rainfall) is April (0.91").
The driest month (with the least rainfall) is September (0.28").
Average rainfall days in September
Decker, IN
- Average rainfall days in September: 7 days
The month with the highest number of rainy days is May (10.8 days).
The month with the least rainy days is December (4.9 days).
Average snowfall in September
Decker, IN
- Average snowfall in September: 0"
The month with the highest snowfall is March (0.24").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Decker, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Decker, IN
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 8h and 36min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 30min).
Average sunshine days in September
Decker, IN
- Average sunshine days in September: 20.7 days
The month with the most sunshine days is December (23.5 days).
The month with the least sunshine days is May (16.9 days).
Average UV index in September
Decker, IN
- Average UV index in September: 5
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
Decker, IN
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are June and August (Cloud cover 28).
Average visibility in September
Decker, IN
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
