September weather forecast
Vandalia, IN

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Weather in September

September, the first month of the autumn in Vandalia, is also a moderately hot month, with an average temperature varying between 58.1°F (14.5°C) and 76.8°F (24.9°C).

Temperature

The onset of September results in a small decrease in the average high-temperature, moderately receding from a moderately hot 82.2°F (27.9°C) in August to a still warm 76.8°F (24.9°C). Vandalia's temperature lowers to a mean of 58.1°F (14.5°C) during the nights in September.

Humidity

In September, the average relative humidity is 77%.

Rainfall

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

Snowfall

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

Daylight

In Vandalia, 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 8:17 pm. On the last day of September, sunrise is at 7:43 am and sunset at 7:31 pm EDT.

Sunshine

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

UV index

In September, the average daily maximum UV index in Vandalia is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.
Note: The average daily UV index of 4 in September transforms into the following instructions:
Take measures. Individuals with light skin might experience burns in under 30 minutes. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
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Frequently asked questions

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). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, in August is computed to be 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?

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

How much does it rain in Vandalia in September?

In Vandalia, Indiana, in September, it is raining for 12.6 days, with typically 1.54" (39mm) of accumulated precipitation.

When it does not snow in Vandalia?

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

Does it snow in Vandalia in September?

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

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

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

When are sunrise and sunset in September in Vandalia?

On the first day of September in Vandalia, Indiana, sunrise is at 7:16 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 7:31 pm EDT.

How many hours of sunshine does Vandalia have in September?

The average sunshine duration in September in Vandalia is 8.4h.

How high is the UV index in September in Vandalia?

In Vandalia, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health risk from unprotected exposure to UV radiation.
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
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 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 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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Vandalia, Indiana, USA

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