September weather forecast
Liverpool, IL

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Weather in September

The first month of the autumn, September, is still a warm month in Liverpool, Illinois, with an average temperature fluctuating between 58.5°F (14.7°C) and 77.2°F (25.1°C).

Temperature

The advent of September denotes an average high-temperature of a still warm 77.2°F (25.1°C), subtly different from August's 82°F (27.8°C). September's average low-temperature reading in Liverpool, Illinois, settles at a refreshing 58.5°F (14.7°C).

Humidity

The average relative humidity in September is 75%.

Rainfall

In Liverpool, during September, the rain falls for 11.5 days and regularly aggregates up to 2.6" (66mm) of precipitation. Throughout the year, in Liverpool, there are 142.9 rainfall days, and 28.31" (719mm) of precipitation is accumulated.

Snowfall

In Liverpool, Illinois, snow does not fall in May through September.

Daylight

The average length of the day in September in Liverpool is 12h and 27min.
On the first day of September in Liverpool, sunrise is at 6:28 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:43 pm CDT.

Sunshine

The average sunshine in September in Liverpool is 9.4h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index of 5 in September interprets into the following recommendations:
Take necessary precautions - Defending against sun damage is advocated. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
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Frequently asked questions

What is the usual temperature for Liverpool in September?

The average high-temperature and low-temperature in Liverpool, Illinois, during September are 77.2°F (25.1°C) and 58.5°F (14.7°C) respectively. The average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in August is computed to be 89.6°F (32°C).

What is the average humidity in September in Liverpool?

The average relative humidity in September in Liverpool, Illinois, is 75%.

How much does it rain in Liverpool in September?

In Liverpool, in September, it is raining for 11.5 days, with typically 2.6" (66mm) of accumulated precipitation.

When it does not snow in Liverpool?

In Liverpool, Illinois, snow does not fall in May through September.

Does it snow in Liverpool in September?

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

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

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

When is the sunrise / sunset in September in Liverpool?

On the first day of September, sunrise is at 6:28 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:43 pm CDT.

How long on average sun shines in September in Liverpool?

In Liverpool, the average sunshine duration in September is 9.4h.

What is the UV index intensity in September in Liverpool?

The average daily maximum UV index in September is 5. A UV Index reading 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 daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Liverpool, IL

Average temperature in September - Liverpool, IL
  • Average high temperature in September: 77.2°F

The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (31.8°F).

  • Average low temperature in September: 58.5°F

The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

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Average pressure in September
Liverpool, IL

Average pressure in September - Liverpool, IL
  • Average pressure in September: 30.02"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in September
Liverpool, IL

Average wind speed in September - Liverpool, IL
  • Average wind speed in September: 7.3mph

The windiest months (with the highest average wind speed) are January, February and April (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).

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Average humidity in September
Liverpool, IL

Average humidity in September - Liverpool, IL
  • Average humidity in September: 75%

The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in September
Liverpool, IL

Average rainfall in September - Liverpool, IL
  • Average rainfall in September: 2.6"

The wettest month (with the highest rainfall) is May (3.86").
The driest month (with the least rainfall) is December (1.38").

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Average rainfall days in September
Liverpool, IL

Average rainfall days in September - Liverpool, IL
  • Average rainfall days in September: 11.5 days

The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (5.8 days).

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Average snowfall in September
Liverpool, IL

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

The month with the highest snowfall is January (3.5").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Liverpool, IL

Average snowfall days in September - Liverpool, IL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (9.2 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
Liverpool, IL

Average daylight in September / Average sunshine in September - Liverpool, IL
  • 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 18min).

  • Average sunshine in September: 9h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).

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Average sunshine days in September
Liverpool, IL

Average sunshine days in September - Liverpool, IL
  • Average sunshine days in September: 16.3 days

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is May (11.1 days).

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Average UV index in September
Liverpool, IL

Average UV index in September - Liverpool, IL
  • 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
Liverpool, IL

Average cloud cover in September - Liverpool, IL
  • Average cloud cover in September: 29

The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are July, August and September (Cloud cover 29).

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Average visibility in September
Liverpool, IL

Average visibility in September - Liverpool, IL
  • Average visibility in September: 6mi

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

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Liverpool, Illinois, USA

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