September weather forecast
Atkinson, IL

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Weather in September

The first month of the autumn, September, is still a warm month in Atkinson, Illinois, with an average temperature varying between 56.3°F (13.5°C) and 75.4°F (24.1°C).

Temperature

The beginning of September records an average high-temperature of a still moderately hot 75.4°F (24.1°C), almost echoing the conditions of the previous month. Throughout September, Atkinson's nights cool down to an average of 56.3°F (13.5°C).

Humidity

The average relative humidity in September is 76%.

Rainfall

In Atkinson, in September, it is raining for 9.7 days, with typically 1.1" (28mm) of accumulated precipitation. Throughout the year, there are 118.8 rainfall days, and 15.04" (382mm) of precipitation is accumulated.

Snowfall

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

Daylight

In Atkinson, the average length of the day in September is 12h and 28min.
On the first day of the month, sunrise is at 6:27 am and sunset at 7:32 pm. On the last day of September, in Atkinson, sunrise is at 6:56 am and sunset at 6:43 pm CDT.

Sunshine

In Atkinson, the average sunshine in September is 9.2h.

UV index

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, a daily UV index of 4 turns into the following recommendations:
Exercise prevention - Warding off sunburn is urged. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
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Frequently asked questions

What is the usual temperature for Atkinson in September?

In Atkinson, 75.4°F (24.1°C) is the average high-temperature and 56.3°F (13.5°C) is the average low-temperature during September. The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in July is estimated at 87.8°F (31°C).

What is the average humidity in September in Atkinson?

In Atkinson, Illinois, the average relative humidity in September is 76%.

How much does it rain in Atkinson in September?

In Atkinson, in September, during 9.7 rainfall days, 1.1" (28mm) of precipitation is typically accumulated.

When it does not snow in Atkinson?

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

Does it snow in Atkinson in September?

In Atkinson, Illinois, in September, it doesn't snow. In October, it regularly snows.

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

In September, the average day length in Atkinson is 12h and 28min.

When is the sunrise / sunset in September in Atkinson?

In September, on the first day of the month, sunrise is at 6:27 am and sunset at 7:32 pm. On the last day of the month, in Atkinson, Illinois, sunrise is at 6:56 am and sunset at 6:43 pm CDT.

How many hours of sunshine does Atkinson have in September?

The average sunshine duration in September is 9.2h.

What is the UV index reading in September in Atkinson?

In Atkinson, Illinois, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to the Sun's 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
Atkinson, IL

Average temperature in September - Atkinson, IL
  • Average high temperature in September: 75.4°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (28°F).

  • Average low temperature in September: 56.3°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16°F).

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Average pressure in September
Atkinson, IL

Average pressure in September - Atkinson, IL
  • 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 (29.91"Hg).

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Average wind speed in September
Atkinson, IL

Average wind speed in September - Atkinson, IL
  • Average wind speed in September: 7.8mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

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Average humidity in September
Atkinson, IL

Average humidity in September - Atkinson, IL
  • Average humidity in September: 76%

The months with the highest relative humidity are January and July (84%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in September
Atkinson, IL

Average rainfall in September - Atkinson, IL
  • Average rainfall in September: 1.1"

The wettest month (with the highest rainfall) is May (2.48").
The driest months (with the least rainfall) are January and December (0.63").

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Average rainfall days in September
Atkinson, IL

Average rainfall days in September - Atkinson, IL
  • Average rainfall days in September: 9.7 days

The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is February (3.9 days).

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Average snowfall in September
Atkinson, IL

Average snowfall in September - Atkinson, IL
  • Average snowfall in September: 0"

The month with the highest snowfall is January (2.13").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Atkinson, IL

Average snowfall days in September - Atkinson, IL
  • 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
Atkinson, IL

Average daylight in September / Average sunshine in September - Atkinson, IL
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in September: 9h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

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Average sunshine days in September
Atkinson, IL

Average sunshine days in September - Atkinson, IL
  • Average sunshine days in September: 19 days

The month with the most sunshine days is December (20.9 days).
The month with the least sunshine days is June (12 days).

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Average UV index in September
Atkinson, IL

Average UV index in September - Atkinson, IL
  • Average UV index in September: 4

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

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Average cloud cover in September
Atkinson, IL

Average cloud cover in September - Atkinson, IL
  • Average cloud cover in September: 30

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

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Average visibility in September
Atkinson, IL

Average visibility in September - Atkinson, IL
  • 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).

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Atkinson, Illinois, USA

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