September weather forecast
Attica, IN

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Attica, Indiana, with an average temperature fluctuating between 75.7°F (24.3°C) and 57.6°F (14.2°C).

Temperature

Attica's September average high-temperature settles at a still warm 75.7°F (24.3°C), showing a near match with the preceding month. Nighttime temperatures hover around an average low of 57.6°F (14.2°C) in September.

Humidity

In Attica, the average relative humidity in September is 78%.

Rainfall

September is the month with the least rainfall. Rain falls for 12.6 days and accumulates 1.5" (38mm) of precipitation.

Snowfall

In Attica, snow does not fall in May through October.

Daylight

In Attica, the average length of the day in September is 12h and 27min.
On the first day of the month, sunrise is at 7:17 am and sunset at 8:20 pm. On the last day of September, sunrise is at 7:45 am and sunset at 7:32 pm EDT.

Sunshine

In September, the average sunshine is 8.4h.

UV index

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the maximum UV index of 5 translates into these guidelines:
Guard yourself - An obligation to protect skin and eyes from harm exists. To guard against the harmful effects of the Sun, minimize exposure during midday. 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.
Updated: Jul 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September?

The average high-temperature, in September, in Attica, is 75.7°F (24.3°C), while the average low-temperature is 57.6°F (14.2°C). In July, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, is calculated to be 87.8°F (31°C).

What is the average humidity in September?

In September, the average relative humidity is 78%.

What is the driest month?

The month with the least rainfall in Attica is September, when the rain falls for 12.6 days and typically collects 1.5" (38mm) of precipitation.

How many days does it rain in September?

In Attica, in September, during 12.6 rainfall days, 1.5" (38mm) of precipitation is typically accumulated.

When it does not snow in Attica?

May through October are months without snowfall in Attica.

What is the average length of the day in September?

In Attica, the average day length in September is 12h and 27min.

When are sunrise and sunset in September?

On the first day of September, sunrise is at 7:17 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 7:32 pm EDT.

How long on average sun shines in September?

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

How high is the UV index in September?

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health risk 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
Attica, IN

Average temperature in September - Attica, IN
  • Average high temperature in September: 75.7°F

The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (32°F).

  • Average low temperature in September: 57.6°F

The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).

Average pressure in September
Attica, IN

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

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in September
Attica, IN

Average wind speed in September - Attica, IN
  • Average wind speed in September: 7mph

The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).

Average humidity in September
Attica, IN

Average humidity in September - Attica, IN
  • Average humidity in September: 78%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (73%).

Average rainfall in September
Attica, IN

Average rainfall in September - Attica, IN
  • Average rainfall in September: 1.5"

The wettest month (with the highest rainfall) is April (3.39").
The driest month (with the least rainfall) is September (1.5").

Average rainfall days in September
Attica, IN

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

The month with the highest number of rainy days is May (19.4 days).
The month with the least rainy days is February (7.3 days).

Average snowfall in September
Attica, IN

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

The month with the highest snowfall is February (3.27").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Attica, IN

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

The month with the highest number of snowfall days is January (11 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in September: 8h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

Average sunshine days in September
Attica, IN

Average sunshine days in September - Attica, IN
  • Average sunshine days in September: 14.6 days

The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is July (9 days).

Average UV index in September
Attica, IN

Average UV index in September - Attica, IN
  • Average UV index in September: 5

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in September
Attica, IN

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

The month with the most cloud cover is January (Cloud cover 59).
The months with the least cloud cover are June and August (Cloud cover 32).

Average visibility in September
Attica, IN

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

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

Attica, Indiana, USA

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