September weather forecast
Buffalo Prairie, IL

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Buffalo Prairie, Illinois, with temperature in the range of an average high of 75.4°F (24.1°C) and an average low of 56.3°F (13.5°C).

Temperature

The arrival of September signals a subtle shift in temperature, down from a moderately hot 80.8°F (27.1°C) in August to a still warm 75.4°F (24.1°C). Buffalo Prairie, in September, experiences an average temperature of 56.3°F (13.5°C) at night.

Humidity

The average relative humidity in September in Buffalo Prairie is 76%.

Rainfall

In Buffalo Prairie, in September, during 9.5 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. In Buffalo Prairie, during the entire year, the rain falls for 128 days and collects up to 19.29" (490mm) of precipitation.

Snowfall

In Buffalo Prairie, snow does not fall in May through September.

Daylight

The average length of the day in September is 12h and 28min.
On the first day of September, sunrise is at 6:30 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:46 pm CDT.

Sunshine

In Buffalo Prairie, Illinois, the average sunshine in September is 9.4h.

UV index

In Buffalo Prairie, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: A typical high UV index of 4 in September suggests the following recommendations:
Adopt protective measures - Suggestions to resist sunburn are offered. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.

Frequently asked questions

What is the average September temperature?

In September, the average high-temperature and low-temperature are 75.4°F (24.1°C) and 56.3°F (13.5°C) respectively. In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is evaluated at 86°F (30°C).

What is the average humidity in September?

In September, the average relative humidity is 76%.

How many days does it rain in September?

In Buffalo Prairie, during September, the rain falls for 9.5 days and regularly aggregates up to 1.38" (35mm) of precipitation.

When it does not snow?

In Buffalo Prairie, snow does not fall in May through September.

Does it snow in September?

In Buffalo Prairie, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September?

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

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:30 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:46 pm CDT.

How many hours of sunshine does Buffalo Prairie have in September?

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

What is the UV index reading in September?

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to 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
Buffalo Prairie, IL

Average temperature in September - Buffalo Prairie, IL
  • Average high temperature in September: 75.4°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28.2°F).

  • Average low temperature in September: 56.3°F

The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).

Average pressure in September
Buffalo Prairie, IL

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

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in September
Buffalo Prairie, IL

Average wind speed in September - Buffalo Prairie, IL
  • Average wind speed in September: 7.8mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).

Average humidity in September
Buffalo Prairie, IL

Average humidity in September - Buffalo Prairie, IL
  • Average humidity in September: 76%

The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (71%).

Average rainfall in September
Buffalo Prairie, IL

Average rainfall in September - Buffalo Prairie, IL
  • Average rainfall in September: 1.38"

The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is December (0.75").

Average rainfall days in September
Buffalo Prairie, IL

Average rainfall days in September - Buffalo Prairie, IL
  • Average rainfall days in September: 9.5 days

The month with the highest number of rainy days is June (17 days).
The month with the least rainy days is January (4.2 days).

Average snowfall in September
Buffalo Prairie, IL

Average snowfall in September - Buffalo Prairie, IL
  • Average snowfall in September: 0"

The month with the highest snowfall is February (2.52").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in September
Buffalo Prairie, IL

Average snowfall days in September - Buffalo Prairie, IL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (10.3 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
Buffalo Prairie, IL

Average daylight in September / Average sunshine in September - Buffalo Prairie, 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: 9h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

Average sunshine days in September
Buffalo Prairie, IL

Average sunshine days in September - Buffalo Prairie, IL
  • Average sunshine days in September: 18.5 days

The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is June (10.8 days).

Average UV index in September
Buffalo Prairie, IL

Average UV index in September - Buffalo Prairie, 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).

Average cloud cover in September
Buffalo Prairie, IL

Average cloud cover in September - Buffalo Prairie, IL
  • Average cloud cover in September: 30

The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in September
Buffalo Prairie, IL

Average visibility in September - Buffalo Prairie, 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).

Buffalo Prairie, Illinois, USA

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