September weather forecast
Retreat, IN

Weather in September

September, the first month of the autumn in Retreat, is also a moderately hot month, with an average temperature ranging between min 58.5°F (14.7°C) and max 78.1°F (25.6°C).

Temperature

In September, the average high-temperature marginally drops from 83.8°F (28.8°C) in August to a still warm 78.1°F (25.6°C). In September, the average low-temperature is 58.5°F (14.7°C).

Humidity

The average relative humidity in September in Retreat, Indiana, is 76%.

Rainfall

September is the month with the least rainfall in Retreat. Rain falls for 12.9 days and accumulates 1.85" (47mm) of precipitation.

Snowfall

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

Daylight

In September, the average length of the day in Retreat, Indiana, is 12h and 26min.
On the first day of the month, sunrise is at 7:12 am and sunset at 8:14 pm. On the last day of September, in Retreat, Indiana, sunrise is at 7:38 am and sunset at 7:28 pm EDT.

Sunshine

In September, the average sunshine in Retreat is 8.3h.

UV index

In Retreat, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily maximum UV index of 5 in September interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Retreat?

The average high-temperature, in September, is 78.1°F (25.6°C), while the average low-temperature is 58.5°F (14.7°C). in August, the average heat index (a.k.a. 'feels like', 'real feel'), which represents the influence of relative humidity on air temperature, is calculated to be 93.2°F (34°C).

What is the average humidity in September in Retreat?

In September, the average relative humidity in Retreat, Indiana, is 76%.

What is the driest month in Retreat?

September is the month with the least rainfall in Retreat, Indiana. Rain falls for 12.9 days and accumulates 1.85" (47mm) of precipitation.

How much does it rain in Retreat in September?

In Retreat, in September, during 12.9 rainfall days, 1.85" (47mm) of precipitation is typically accumulated.

When it does not snow in Retreat?

May through September are months without snowfall in Retreat, Indiana.

Does it snow in Retreat in September?

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

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

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

When is the sunrise / sunset in September in Retreat?

On the first day of September in Retreat, Indiana, sunrise is at 7:12 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 7:28 pm EDT.

How long on average sun shines in September in Retreat?

The average sunshine duration in September is 8.3h.

What is the UV index reading in September in Retreat?

The average daily maximum UV index in September in Retreat, Indiana, is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Retreat, IN

Average temperature in September - Retreat, IN
  • Average high temperature in September: 78.1°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (36.7°F).

  • Average low temperature in September: 58.5°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

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Average pressure in September
Retreat, IN

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

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in September
Retreat, IN

Average wind speed in September - Retreat, IN
  • Average wind speed in September: 5.7mph

The windiest months (with the highest average wind speed) are January and February (8.2mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).

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Average humidity in September
Retreat, IN

Average humidity in September - Retreat, IN
  • Average humidity in September: 76%

The month with the highest relative humidity is December (81%).
The month with the lowest relative humidity is October (74%).

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Average rainfall in September
Retreat, IN

Average rainfall in September - Retreat, IN
  • Average rainfall in September: 1.85"

The wettest month (with the highest rainfall) is April (3.82").
The driest month (with the least rainfall) is September (1.85").

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Average rainfall days in September
Retreat, IN

Average rainfall days in September - Retreat, IN
  • Average rainfall days in September: 12.9 days

The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is February (9.9 days).

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Average snowfall in September
Retreat, IN

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

The month with the highest snowfall is February (2.72").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Retreat, IN

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

The month with the highest number of snowfall days is January (9 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
Retreat, IN

Average daylight in September / Average sunshine in September - Retreat, IN
  • Average daylight in September: 12h and 26min

The month with the longest days is June (Average daylight: 14h and 50min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in September: 8h and 18min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The months with the least sunshine are January and December (Average sunshine: 4h and 6min).

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Average sunshine days in September
Retreat, IN

Average sunshine days in September - Retreat, IN
  • Average sunshine days in September: 15.1 days

The month with the most sunshine days is October (17.5 days).
The month with the least sunshine days is May (9.6 days).

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Average UV index in September
Retreat, IN

Average UV index in September - Retreat, 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).

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Average cloud cover in September
Retreat, IN

Average cloud cover in September - Retreat, IN
  • Average cloud cover in September: 33

The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 30).

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Average visibility in September
Retreat, IN

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

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

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