September weather forecastPalos Park, IL
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Palos Park, Illinois, with an average temperature varying between 73.9°F (23.3°C) and 58.1°F (14.5°C).Temperature
September sees a slight reduction in average high-temperature, with a shift from 80.2°F (26.8°C) in August to a still moderately hot 73.9°F (23.3°C). Palos Park experiences a nighttime temperature average of 58.1°F (14.5°C) during September.Humidity
In September, the average relative humidity in Palos Park is 76%.Rainfall
In Palos Park, during September, the rain falls for 13.8 days and regularly aggregates up to 1.85" (47mm) of precipitation. Throughout the year, there are 146.9 rainfall days, and 23.11" (587mm) of precipitation is accumulated.Snowfall
In Palos Park, snow does not fall in May through September.Daylight
In September, the average length of the day in Palos Park is 12h and 28min.On the first day of the month, sunrise is at 6:18 am and sunset at 7:24 pm. On the last day of September, in Palos Park, Illinois, sunrise is at 6:47 am and sunset at 6:34 pm CDT.
Sunshine
In September, the average sunshine in Palos Park is 8.8h.UV index
In Palos Park, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Take necessary precautions - Defending against sun damage is advocated. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Palos Park, IL
- Average high temperature in September: 73.9°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (29.1°F).
- Average low temperature in September: 58.1°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in September
Palos Park, 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).
Average wind speed in September
Palos Park, IL
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
Palos Park, IL
- Average humidity in September: 76%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Palos Park, IL
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is May (2.95").
The driest month (with the least rainfall) is December (1.06").
Average rainfall days in September
Palos Park, IL
- Average rainfall days in September: 13.8 days
The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in September
Palos Park, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.87").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Palos Park, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.8 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
Palos Park, IL
- Average daylight in September: 12h and 30min
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 48min
The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Palos Park, IL
- Average sunshine days in September: 13.4 days
The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in September
Palos Park, IL
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Palos Park, IL
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Palos Park, 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).
