September weather forecast
Hillview, IL

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Hillview, Illinois, with an average temperature ranging between max 78.1°F (25.6°C) and min 59.2°F (15.1°C).

Temperature

A subtle change in temperatures is noted as August gives way to September, with average highs reducing from 83.5°F (28.6°C) to a still warm 78.1°F (25.6°C). The average low-temperature, in September, in Hillview, is a moderate 59.2°F (15.1°C).

Humidity

The average relative humidity in September is 74%.

Rainfall

In Hillview, during September, the rain falls for 11 days and regularly aggregates up to 1.34" (34mm) of precipitation. In Hillview, during the entire year, the rain falls for 127.3 days and collects up to 17.24" (438mm) of precipitation.

Snowfall

In Hillview, Illinois, snow does not fall in May through October.

Daylight

In September, the average length of the day in Hillview, Illinois, is 12h and 26min.
On the first day of the month, sunrise is at 6:31 am and sunset at 7:32 pm. On the last day of September, sunrise is at 6:58 am and sunset at 6:45 pm CDT.

Sunshine

In Hillview, the average sunshine in September is 9.4h.

UV index

In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The average daily UV index of 5 in September transforms into the following instructions:
Put precautions into practice - Guidance to elude sunburn is provided. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
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Frequently asked questions

What are the temperatures in Hillview in September?

The high-temperature, in September, in Hillview, is 78.1°F (25.6°C), while the low-temperature averages to 59.2°F (15.1°C). In August, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is evaluated at 91.4°F (33°C).

What is the average humidity in September in Hillview?

In Hillview, Illinois, the average relative humidity in September is 74%.

How much does it rain in Hillview in September?

In Hillview, Illinois, during September, the rain falls for 11 days and regularly aggregates up to 1.34" (34mm) of precipitation.

When it does not snow in Hillview?

In Hillview, snow does not fall in May through October.

How many hours of daylight does Hillview have in September?

In Hillview, Illinois, the average day length in September is 12h and 26min.

When are sunrise and sunset in September in Hillview?

In September, on the first day of the month, sunrise is at 6:31 am and sunset at 7:32 pm. On the last day of the month, in Hillview, Illinois, sunrise is at 6:58 am and sunset at 6:45 pm CDT.

How long on average sun shines in September in Hillview?

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

How high is the UV index in September in Hillview?

In Hillview, Illinois, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes 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
Hillview, IL

Average temperature in September - Hillview, IL
  • Average high temperature in September: 78.1°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (34.3°F).

  • Average low temperature in September: 59.2°F

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).

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Average pressure in September
Hillview, IL

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

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in September
Hillview, IL

Average wind speed in September - Hillview, IL
  • Average wind speed in September: 6.7mph

The windiest months (with the highest average wind speed) are January, February and April (9.8mph).
The calmest month (with the lowest average wind speed) is July (5.9mph).

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Average humidity in September
Hillview, IL

Average humidity in September - Hillview, IL
  • Average humidity in September: 74%

The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in September
Hillview, IL

Average rainfall in September - Hillview, IL
  • Average rainfall in September: 1.34"

The wettest month (with the highest rainfall) is June (2.44").
The driest months (with the least rainfall) are January and November (0.83").

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Average rainfall days in September
Hillview, IL

Average rainfall days in September - Hillview, IL
  • Average rainfall days in September: 11 days

The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (5.5 days).

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Average snowfall in September
Hillview, IL

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

The month with the highest snowfall is February (1.69").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Hillview, IL

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

The month with the highest number of snowfall days is January (7.2 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
Hillview, IL

Average daylight in September / Average sunshine in September - Hillview, IL
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in September: 9h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

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Average sunshine days in September
Hillview, IL

Average sunshine days in September - Hillview, IL
  • Average sunshine days in September: 16.5 days

The month with the most sunshine days is December (20.6 days).
The month with the least sunshine days is July (12.3 days).

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Average UV index in September
Hillview, IL

Average UV index in September - Hillview, 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
Hillview, IL

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

The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is September (Cloud cover 29).

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Average visibility in September
Hillview, IL

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

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

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Hillview, Illinois, USA

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