September weather forecast
Mount Palatine, IL

Weather in September

The first month of the autumn, September, is still a warm month in Mount Palatine, Illinois, with an average temperature fluctuating between 75°F (23.9°C) and 56.5°F (13.6°C).

Temperature

In Mount Palatine, the average high-temperature in September is almost the same as in August - a still warm 75°F (23.9°C). In Mount Palatine, the average low-temperature is 56.5°F (13.6°C).

Humidity

In Mount Palatine, the average relative humidity in September is 77%.

Rainfall

In September, the rain falls for 11.7 days. Throughout September, 2.24" (57mm) of precipitation is accumulated. In Mount Palatine, during the entire year, the rain falls for 151.3 days and collects up to 30.16" (766mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

The average length of the day in September in Mount Palatine 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, sunrise is at 6:52 am and sunset at 6:40 pm CDT.

Sunshine

In September, the average sunshine is 9h.

UV index

In September, the average daily maximum UV index in Mount Palatine, Illinois, is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 4 in September interpret into the following advice:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Mount Palatine?

In September, the average high-temperature is 75°F (23.9°C), and the average low-temperature is 56.5°F (13.6°C). in July, the average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, is calculated to be 87.8°F (31°C).

What is the average humidity in September in Mount Palatine?

In Mount Palatine, Illinois, the average relative humidity in September is 77%.

How many days does it rain in September in Mount Palatine?

In September, in Mount Palatine, the rain falls for 11.7 days. Throughout September, 2.24" (57mm) of precipitation is accumulated.

When it does not snow in Mount Palatine?

May through September are months without snowfall in Mount Palatine, Illinois.

Does it snow in Mount Palatine in September?

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

What is the average length of the day in September in Mount Palatine?

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

What time are sunrise and sunset in September in Mount Palatine?

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, sunrise is at 6:52 am and sunset at 6:40 pm CDT.

How long on average sun shines in September in Mount Palatine?

The average sunshine duration in September in Mount Palatine is 9h.

What is the UV index intensity in September in Mount Palatine?

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Mount Palatine, IL

Average temperature in September - Mount Palatine, IL
  • Average high temperature in September: 75°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (29.3°F).

  • Average low temperature in September: 56.5°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).

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Average pressure in September
Mount Palatine, IL

Average pressure in September - Mount Palatine, 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
Mount Palatine, IL

Average wind speed in September - Mount Palatine, IL
  • Average wind speed in September: 7.6mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

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Average humidity in September
Mount Palatine, IL

Average humidity in September - Mount Palatine, IL
  • Average humidity in September: 77%

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
Mount Palatine, IL

Average rainfall in September - Mount Palatine, IL
  • Average rainfall in September: 2.24"

The wettest month (with the highest rainfall) is May (4.41").
The driest months (with the least rainfall) are January and December (1.57").

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Average rainfall days in September
Mount Palatine, IL

Average rainfall days in September - Mount Palatine, IL
  • Average rainfall days in September: 11.7 days

The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is February (5.9 days).

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Average snowfall in September
Mount Palatine, IL

Average snowfall in September - Mount Palatine, IL
  • Average snowfall in September: 0"

The month with the highest snowfall is February (3.7").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Mount Palatine, IL

Average snowfall days in September - Mount Palatine, IL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (11.2 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
Mount Palatine, IL

Average daylight in September / Average sunshine in September - Mount Palatine, IL
  • Average daylight in September: 12h and 28min

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 16min).

  • Average sunshine in September: 9h and 0min

The month with the most sunshine is June (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

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Average sunshine days in September
Mount Palatine, IL

Average sunshine days in September - Mount Palatine, IL
  • Average sunshine days in September: 16.3 days

The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is May (10.7 days).

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Average UV index in September
Mount Palatine, IL

Average UV index in September - Mount Palatine, IL
  • Average UV index in September: 4

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

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Average cloud cover in September
Mount Palatine, IL

Average cloud cover in September - Mount Palatine, IL
  • Average cloud cover in September: 32

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

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Average visibility in September
Mount Palatine, IL

Average visibility in September - Mount Palatine, 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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