September weather forecast
Vandalia, IN

Weather in September

September, the first month of the autumn in Vandalia, is still a warm month, with an average temperature fluctuating between 76.8°F (24.9°C) and 58.1°F (14.5°C).

Temperature

In September, the average high-temperature marginally drops from 82.2°F (27.9°C) in August to a still moderately hot 76.8°F (24.9°C). The average low-temperature, is 58.1°F (14.5°C).

Humidity

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

Rainfall

September is the month with the least rainfall. Rain falls for 12.6 days and accumulates 1.54" (39mm) of precipitation.

Snowfall

May through September are months without snowfall in Vandalia.

Daylight

In Vandalia, Indiana, the average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 7:16 am and sunset at 8:18 pm. On the last day of September, sunrise is at 7:42 am and sunset at 7:31 pm EDT.

Sunshine

The average sunshine in September is 8.4h.

UV index

In Vandalia, Indiana, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Vandalia?

In Vandalia, in September, the average high-temperature is 76.8°F (24.9°C), and the average low-temperature is 58.1°F (14.5°C). in August, the average heat index (a.k.a. 'feels like', 'real feel'), which factors the actual air temperature with the relative humidity, is evaluated at 89.6°F (32°C).

What is the average humidity in September in Vandalia?

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

What is the driest month in Vandalia?

The month with the least rainfall is September, when the rain falls for 12.6 days and typically collects 1.54" (39mm) of precipitation.

How many days does it rain in September in Vandalia?

In Vandalia, Indiana, in September, during 12.6 rainfall days, 1.54" (39mm) of precipitation is typically accumulated.

When it does not snow in Vandalia?

May through September are months without snowfall in Vandalia.

Does it snow in Vandalia in September?

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

How many hours of daylight does Vandalia have in September?

In Vandalia, the average day length in September is 12h and 26min.

When is the sunrise / sunset in September in Vandalia?

In September, on the first day of the month, sunrise is at 7:16 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 7:31 pm EDT.

How long on average sun shines in September in Vandalia?

In Vandalia, the average sunshine duration in September is 8.4h.

How high is the UV index in September in Vandalia?

The average daily maximum UV index in September in Vandalia is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from exposure to Sun's UV rays.
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
Vandalia, IN

Average temperature in September - Vandalia, IN
  • Average high temperature in September: 76.8°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 (34.9°F).

  • Average low temperature in September: 58.1°F

The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

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Average pressure in September
Vandalia, IN

Average pressure in September - Vandalia, 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 (29.93"Hg).

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Average wind speed in September
Vandalia, IN

Average wind speed in September - Vandalia, IN
  • Average wind speed in September: 6.1mph

The windiest month (with the highest average wind speed) is February (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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Average humidity in September
Vandalia, IN

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

The months with the highest relative humidity are May and July (82%).
The month with the lowest relative humidity is October (74%).

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Average rainfall in September
Vandalia, IN

Average rainfall in September - Vandalia, IN
  • Average rainfall in September: 1.54"

The wettest month (with the highest rainfall) is April (3.11").
The driest month (with the least rainfall) is September (1.54").

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Average rainfall days in September
Vandalia, IN

Average rainfall days in September - Vandalia, IN
  • Average rainfall days in September: 12.6 days

The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is January (8.3 days).

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Average snowfall in September
Vandalia, IN

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

The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Vandalia, IN

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

The month with the highest number of snowfall days is January (9.1 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
Vandalia, IN

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

The month with the longest days is June (Average daylight: 14h and 53min).
The month with the shortest days is December (Average daylight: 9h and 27min).

  • Average sunshine in September: 8h and 24min

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

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Average sunshine days in September
Vandalia, IN

Average sunshine days in September - Vandalia, IN
  • Average sunshine days in September: 14.7 days

The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is May (9.8 days).

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Average UV index in September
Vandalia, IN

Average UV index in September - Vandalia, 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 and December (UV index 2).

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Average cloud cover in September
Vandalia, IN

Average cloud cover in September - Vandalia, 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
Vandalia, IN

Average visibility in September - Vandalia, IN
  • Average visibility in September: 6mi

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

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