September weather forecast
Dalzell, IL

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Weather in September

September, the first month of the autumn in Dalzell, is still a warm month, with temperature in the range of an average low of 56.1°F (13.4°C) and an average high of 74.5°F (23.6°C).

Temperature

With the advent of September, Dalzell experiences an average high-temperature of a still warm 74.5°F (23.6°C), mirroring a close resemblance to the previous month. During the September nights, an average temperature of 56.1°F (13.4°C) is observed.

Humidity

In September, the average relative humidity is 78%.

Rainfall

In Dalzell, during September, the rain falls for 11.5 days and regularly aggregates up to 2.28" (58mm) of precipitation. Throughout the year, in Dalzell, there are 151.4 rainfall days, and 30.67" (779mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall in Dalzell.

Daylight

In Dalzell, Illinois, the average length of the day in September is 12h and 28min.
On the first day of the month, sunrise is at 6:23 am and sunset at 7:29 pm. On the last day of September, in Dalzell, sunrise is at 6:53 am and sunset at 6:39 pm CDT.

Sunshine

The average sunshine in September in Dalzell is 8.8h.

UV index

In Dalzell, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.
Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
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Frequently asked questions

What are September temperatures in Dalzell?

An average high-temperature, in September, in Dalzell, is 74.5°F (23.6°C) and the average low-temperature is 56.1°F (13.4°C). In July, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines air temperature and relative humidity, is computed to be 86°F (30°C).

What is the average humidity in September in Dalzell?

The average relative humidity in September in Dalzell is 78%.

How many days does it rain in September in Dalzell?

In Dalzell, in September, during 11.5 rainfall days, 2.28" (58mm) of precipitation is typically accumulated.

When it does not snow in Dalzell?

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

Does it snow in Dalzell in September?

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

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

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

When are sunrise and sunset in September in Dalzell?

In September, on the first day of the month, sunrise is at 6:23 am and sunset at 7:29 pm. On the last day of the month, in Dalzell, sunrise is at 6:53 am and sunset at 6:39 pm CDT.

How many hours of sunshine does Dalzell have in September?

In September, the average sunshine duration is 8.8h.

What is the UV index reading in September in Dalzell?

In September, the average daily maximum UV index in Dalzell, Illinois, is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe 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
Dalzell, IL

Average temperature in September - Dalzell, IL
  • Average high temperature in September: 74.5°F

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (28.9°F).

  • Average low temperature in September: 56.1°F

The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).

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Average pressure in September
Dalzell, IL

Average pressure in September - Dalzell, 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
Dalzell, IL

Average wind speed in September - Dalzell, IL
  • Average wind speed in September: 7.4mph

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

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Average humidity in September
Dalzell, IL

Average humidity in September - Dalzell, IL
  • Average humidity in September: 78%

The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in September
Dalzell, IL

Average rainfall in September - Dalzell, IL
  • Average rainfall in September: 2.28"

The wettest month (with the highest rainfall) is May (4.65").
The driest month (with the least rainfall) is February (1.57").

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Average rainfall days in September
Dalzell, IL

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

The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is January (5.5 days).

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Average snowfall in September
Dalzell, IL

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

The month with the highest snowfall is January (4.37").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Dalzell, IL

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

The month with the highest number of snowfall days is January (12.1 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
Dalzell, IL

Average daylight in September / Average sunshine in September - Dalzell, 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: 8h and 5min

The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

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Average sunshine days in September
Dalzell, IL

Average sunshine days in September - Dalzell, IL
  • Average sunshine days in September: 15.2 days

The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is May (10.4 days).

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Average UV index in September
Dalzell, IL

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

The months with the highest UV index are June and 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
Dalzell, IL

Average cloud cover in September - Dalzell, IL
  • Average cloud cover in September: 32

The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 32).

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Average visibility in September
Dalzell, IL

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

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

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Dalzell, Illinois, USA

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