September weather forecast
Decker, IN

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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.

Frequently asked questions

What is the temperature in September in Decker?

In September, the average high-temperature and low-temperature are 78.6°F (25.9°C) and 60.1°F (15.6°C) respectively. In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is estimated at 91.4°F (33°C).

What is the average humidity in September?

The average relative humidity in September is 74%.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 7 days and typically collects 0.28" (7mm) of precipitation.

How much does it rain in September?

In Decker, in September, it is raining for 7 days, with typically 0.28" (7mm) of accumulated precipitation.

When it does not snow?

In Decker, snow does not fall in April through October.

How many hours of daylight does Decker have in September?

In September, the average day length is 12h and 25min.

When are sunrise and sunset in September?

In September, on the first day of the month, 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.

How many hours of sunshine does Decker have in September?

In September, the average sunshine duration in Decker is 8.6h.

What is the UV index reading in September?

In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Decker, IN

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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 / Average sunshine in September - Decker, IN
  • Average daylight in September: 12h and 2min

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 4min

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 - 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 - 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 - 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 - 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).

Decker, Indiana, USA

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