September weather forecast
East Dundee, IL

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Weather in September

September, the first month of the autumn in East Dundee, is also an agreeable month, with an average temperature varying between 55.9°F (13.3°C) and 73°F (22.8°C).

Temperature

East Dundee's weather subtly changes with the onset of September, barely falling from a moderately hot 79°F (26.1°C) in August to an agreeable 73°F (22.8°C). An average low-temperature of 55.9°F (13.3°C) marks the month of September.

Humidity

The average relative humidity in September in East Dundee is 78%.

Rainfall

In East Dundee, in September, during 12.5 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. Throughout the year, in East Dundee, there are 149.2 rainfall days, and 24.02" (610mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

In East Dundee, the average length of the day in September is 12h and 28min.
On the first day of September in East Dundee, Illinois, sunrise is at 6:19 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:35 pm CDT.

Sunshine

The average sunshine in September in East Dundee is 8.7h.

UV index

In East Dundee, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 4 in September interprets into the following advice:
Guard yourself - An obligation to protect skin and eyes from harm exists. The Sun's radiation is especially intense around midday; try to stay in shade during this period. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
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Frequently asked questions

What is the temperature in September in East Dundee?

The average high-temperature, in September, in East Dundee, is 73°F (22.8°C), while the average low-temperature is 55.9°F (13.3°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in July is computed to be 86°F (30°C).

What is the average humidity in September in East Dundee?

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

How many days does it rain in September in East Dundee?

In East Dundee, in September, during 12.5 rainfall days, 1.69" (43mm) of precipitation is typically accumulated.

When it does not snow in East Dundee?

In East Dundee, snow does not fall in June through September.

Does it snow in East Dundee in September?

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

What is the average length of the day in September in East Dundee?

In September, the average day length in East Dundee, Illinois, is 12h and 28min.

When is the sunrise / sunset in September in East Dundee?

In September, on the first day of the month, sunrise is at 6:19 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:35 pm CDT.

How many hours of sunshine does East Dundee have in September?

In September, the average sunshine duration in East Dundee is 8.7h.

What is the UV index intensity in September in East Dundee?

In September, the average daily maximum UV index in East Dundee, Illinois, is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat 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
East Dundee, IL

Average temperature in September - East Dundee, IL
  • Average high temperature in September: 73°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 (27.3°F).

  • Average low temperature in September: 55.9°F

The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).

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Average pressure in September
East Dundee, IL

Average pressure in September - East Dundee, IL
  • Average pressure in September: 30.03"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in September
East Dundee, IL

Average wind speed in September - East Dundee, IL
  • Average wind speed in September: 7.1mph

The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).

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Average humidity in September
East Dundee, IL

Average humidity in September - East Dundee, IL
  • Average humidity in September: 78%

The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (75%).

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Average rainfall in September
East Dundee, IL

Average rainfall in September - East Dundee, IL
  • Average rainfall in September: 1.69"

The wettest month (with the highest rainfall) is June (3.03").
The driest month (with the least rainfall) is December (1.1").

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Average rainfall days in September
East Dundee, IL

Average rainfall days in September - East Dundee, IL
  • Average rainfall days in September: 12.5 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (4.9 days).

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Average snowfall in September
East Dundee, IL

Average snowfall in September - East Dundee, IL
  • Average snowfall in September: 0"

The month with the highest snowfall is January (3.62").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
East Dundee, IL

Average snowfall days in September - East Dundee, IL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
East Dundee, IL

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

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

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

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Average sunshine days in September
East Dundee, IL

Average sunshine days in September - East Dundee, IL
  • Average sunshine days in September: 14.5 days

The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (10.1 days).

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Average UV index in September
East Dundee, IL

Average UV index in September - East Dundee, IL
  • Average UV index in September: 4

The months with the highest UV index are July and August (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
East Dundee, IL

Average cloud cover in September - East Dundee, IL
  • Average cloud cover in September: 33

The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are August and September (Cloud cover 33).

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Average visibility in September
East Dundee, IL

Average visibility in September - East Dundee, IL
  • Average visibility in September: 6mi

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

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East Dundee, Illinois, USA

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