September weather forecast
Ellettsville, IN

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Weather in September

The first month of the autumn, September, is still a warm month in Ellettsville, Indiana, with an average temperature fluctuating between 58.1°F (14.5°C) and 77°F (25°C).

Temperature

September brings a slight decrease in temperature, down from a warm 82.6°F (28.1°C) in August to a still moderately hot 77°F (25°C). Throughout September, the nighttime temperature in Ellettsville, Indiana, averages to a mild 58.1°F (14.5°C).

Humidity

The average relative humidity in September in Ellettsville is 77%.

Rainfall

The month with the least rainfall is September, when the rain falls for 11.3 days and typically collects 1.26" (32mm) of precipitation.

Snowfall

In Ellettsville, snow does not fall in May through September.

Daylight

In September, the average length of the day in Ellettsville is 12h and 26min.
On the first day of September, sunrise is at 7:15 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 7:30 pm EDT.

Sunshine

The average sunshine in September is 8.4h.

UV index

The average daily maximum UV index in September is 4. A UV Index reading 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, a daily UV index of 4 turns into the following recommendations:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Resources | Updated: Feb 12, 2024 | Published by: Weather U.S.

Frequently asked questions

What are the temperatures in Ellettsville in September?

The average high-temperature, in September, in Ellettsville, is 77°F (25°C), while the average low-temperature is 58.1°F (14.5°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in August is estimated at 89.6°F (32°C).

What is the average humidity in September in Ellettsville?

In September, the average relative humidity in Ellettsville, Indiana, is 77%.

What is the driest month in Ellettsville?

September is the month with the least rainfall. Rain falls for 11.3 days and accumulates 1.26" (32mm) of precipitation.

How much does it rain in Ellettsville in September?

In Ellettsville, in September, it is raining for 11.3 days, with typically 1.26" (32mm) of accumulated precipitation.

When it does not snow in Ellettsville?

In Ellettsville, Indiana, snow does not fall in May through September.

Does it snow in Ellettsville in September?

In Ellettsville, Indiana, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Ellettsville?

The average day length in September in Ellettsville, Indiana, is 12h and 26min.

What time are sunrise and sunset in September in Ellettsville?

On the first day of September, sunrise is at 7:15 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 7:30 pm EDT.

How many hours of sunshine does Ellettsville have in September?

In September, the average sunshine duration is 8.4h.

What is the UV index intensity in September in Ellettsville?

In September, the average daily maximum UV index in Ellettsville is 4. 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
Ellettsville, IN

Average temperature in September - Ellettsville, IN
  • Average high temperature in September: 77°F

The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (35.2°F).

  • Average low temperature in September: 58.1°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

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Average pressure in September
Ellettsville, IN

Average pressure in September - Ellettsville, IN
  • Average pressure in September: 30.03"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in September
Ellettsville, IN

Average wind speed in September - Ellettsville, IN
  • Average wind speed in September: 5.9mph

The windiest months (with the highest average wind speed) are January and February (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

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Average humidity in September
Ellettsville, IN

Average humidity in September - Ellettsville, IN
  • Average humidity in September: 77%

The months with the highest relative humidity are May, July and December (82%).
The month with the lowest relative humidity is October (75%).

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Average rainfall in September
Ellettsville, IN

Average rainfall in September - Ellettsville, IN
  • Average rainfall in September: 1.26"

The wettest month (with the highest rainfall) is May (2.44").
The driest month (with the least rainfall) is September (1.26").

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Average rainfall days in September
Ellettsville, IN

Average rainfall days in September - Ellettsville, IN
  • Average rainfall days in September: 11.3 days

The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is January (7.6 days).

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Average snowfall in September
Ellettsville, IN

Average snowfall in September - Ellettsville, IN
  • Average snowfall in September: 0"

The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Ellettsville, IN

Average snowfall days in September - Ellettsville, IN
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (7.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Ellettsville, IN

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

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 2min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The months with the least sunshine are January and December (Average sunshine: 4h and 18min).

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Average sunshine days in September
Ellettsville, IN

Average sunshine days in September - Ellettsville, IN
  • Average sunshine days in September: 16.1 days

The month with the most sunshine days is October (19.4 days).
The month with the least sunshine days is May (9.6 days).

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Average UV index in September
Ellettsville, IN

Average UV index in September - Ellettsville, IN
  • Average UV index in September: 4

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, October and December (UV index 2).

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Average cloud cover in September
Ellettsville, IN

Average cloud cover in September - Ellettsville, 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).

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Average visibility in September
Ellettsville, IN

Average visibility in September - Ellettsville, IN
  • Average visibility in September: 5mi

The months with the highest visibility are January, February, March, April, June, October, November and December (6mi).
The months with the lowest visibility are May, July, August and September (5mi).

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Ellettsville, Indiana, USA

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