Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
As September arrives, Washington Park's weather displays a minor decrease in high-temperatures, transitioning from August's moderately hot 85.1°F (29.5°C) to a still warm 79.3°F (26.3°C). In the month of September, Washington Park records a consistent average low-temperature of 60.1°F (15.6°C).Humidity
The average relative humidity in September is 74%.Rainfall
In Washington Park, in September, during 12.9 rainfall days, 2.32" (59mm) of precipitation is typically accumulated. In Washington Park, Illinois, during the entire year, the rain falls for 154.5 days and collects up to 35.51" (902mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Washington Park, Illinois, the average length of the day in September is 12h and 25min.On the first day of September in Washington Park, sunrise is at 6:30 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:44 pm CDT.
Sunshine
The average sunshine in September is 9.4h.UV index
In Washington Park, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum daily UV index of 5 during September morphs into the following directions:
Ensure safety - Sun damage prevention is strongly urged. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Frequently asked questions
What is the usual temperature for Washington Park in September?
What is the average humidity in September in Washington Park?
How many days does it rain in September in Washington Park?
When it does not snow in Washington Park?
What is the average length of the day in September in Washington Park?
When is the sunrise / sunset in September in Washington Park?
How long on average sun shines in September in Washington Park?
What is the UV index intensity in September in Washington Park?
Average temperature in September
Washington Park, IL
- Average high temperature in September: 79.3°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (37.8°F).
- Average low temperature in September: 60.1°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (24.4°F).
Average pressure in September
Washington Park, IL
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Washington Park, IL
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is July (5.5mph).
Average humidity in September
Washington Park, IL
- Average humidity in September: 74%
The months with the highest relative humidity are May and July (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Washington Park, IL
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is February (1.89").
Average rainfall days in September
Washington Park, IL
- Average rainfall days in September: 12.9 days
The months with the highest number of rainy days are May and July (17.5 days).
The month with the least rainy days is January (8 days).
Average snowfall in September
Washington Park, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.64").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Washington Park, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.3 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
Washington Park, IL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 2min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in September
Washington Park, IL
- Average sunshine days in September: 15 days
The month with the most sunshine days is December (18.8 days).
The month with the least sunshine days is May (11.2 days).
Average UV index in September
Washington Park, IL
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Washington Park, IL
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Washington 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).
Washington Park, Illinois, USA
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