September weather forecast
Bunker Hill, IL

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Bunker Hill, Illinois, with an average temperature ranging between max 78.1°F (25.6°C) and min 59.4°F (15.2°C).

Temperature

The onset of September marks an average high-temperature of a still moderately hot 78.1°F (25.6°C), hardly differing from August's 83.1°F (28.4°C). Throughout the month of September, the average temperature dips to a mild 59.4°F (15.2°C) at night.

Humidity

In September, the average relative humidity is 75%.

Rainfall

In September, the rain falls for 9.1 days. Throughout September, 0.83" (21mm) of precipitation is accumulated. In Bunker Hill, during the entire year, the rain falls for 115.4 days and collects up to 13.23" (336mm) of precipitation.

Snowfall

In Bunker Hill, snow does not fall in April through October.

Daylight

The average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 6:29 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:43 pm CDT.

Sunshine

In Bunker Hill, the average sunshine in September is 9.2h.

UV index

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the maximum UV index of 5 translates into these guidelines:
Heed the precautions - It is counselled to guard against solar damage. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Updated: Aug 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures?

The high-temperature, in September, in Bunker Hill, records 78.1°F (25.6°C), while the low-temperature is 59.4°F (15.2°C). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 91.4°F (33°C).

What is the average humidity in September in Bunker Hill?

The average relative humidity in September is 75%.

How much does it rain in September?

In Bunker Hill, in September, it is raining for 9.1 days, with typically 0.83" (21mm) of accumulated precipitation.

When it does not snow?

In Bunker Hill, snow does not fall in April through October.

How many hours of daylight does Bunker Hill have in September?

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

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:29 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:43 pm CDT.

How many hours of sunshine does Bunker Hill have in September?

In September, the average sunshine duration is 9.2h.

How high is the UV index in September?

In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health 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
Bunker Hill, IL

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

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (36°F).

  • Average low temperature in September: 59.4°F

The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (23°F).

Average pressure in September
Bunker Hill, IL

Average pressure in September - Bunker Hill, 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 (29.92"Hg).

Average wind speed in September
Bunker Hill, IL

Average wind speed in September - Bunker Hill, IL
  • Average wind speed in September: 6.4mph

The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).

Average humidity in September
Bunker Hill, IL

Average humidity in September - Bunker Hill, IL
  • Average humidity in September: 75%

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

Average rainfall in September
Bunker Hill, IL

Average rainfall in September - Bunker Hill, IL
  • Average rainfall in September: 0.83"

The wettest month (with the highest rainfall) is August (1.77").
The driest month (with the least rainfall) is February (0.55").

Average rainfall days in September
Bunker Hill, IL

Average rainfall days in September - Bunker Hill, IL
  • Average rainfall days in September: 9.1 days

The months with the highest number of rainy days are May and July (13.8 days).
The month with the least rainy days is December (5.1 days).

Average snowfall in September
Bunker Hill, IL

Average snowfall in September - Bunker Hill, IL
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.87").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Bunker Hill, IL

Average snowfall days in September - Bunker Hill, IL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (5.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Bunker Hill, IL

Average daylight in September / Average sunshine in September - Bunker Hill, 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 30min).

  • Average sunshine in September: 9h and 1min

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 24min).

Average sunshine days in September
Bunker Hill, IL

Average sunshine days in September - Bunker Hill, IL
  • Average sunshine days in September: 18.7 days

The month with the most sunshine days is December (22.5 days).
The month with the least sunshine days is June (13.8 days).

Average UV index in September
Bunker Hill, IL

Average UV index in September - Bunker Hill, 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).

Average cloud cover in September
Bunker Hill, IL

Average cloud cover in September - Bunker Hill, IL
  • Average cloud cover in September: 30

The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June and August (Cloud cover 29).

Average visibility in September
Bunker Hill, IL

Average visibility in September - Bunker Hill, 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).

Bunker Hill, Illinois, USA

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