September weather forecastJoy, IL
September
Weather in September
September, the first month of the autumn in Joy, is also a moderately hot month, 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 corresponds with a light shift in temperature, down from a moderately hot 81°F (27.2°C) in August to a still warm 75.4°F (24.1°C). The low-temperature in Joy averages to a refreshing 56.3°F (13.5°C) during the nights of September.Humidity
The average relative humidity in September is 76%.Rainfall
In Joy, during September, the rain falls for 9.7 days and regularly aggregates up to 1.46" (37mm) of precipitation. In Joy, during the entire year, the rain falls for 121.3 days and collects up to 17.72" (450mm) of precipitation.Snowfall
In Joy, snow does not fall in May through September.Daylight
In Joy, the average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:30 am and sunset at 7:35 pm. On the last day of September, in Joy, sunrise is at 6:59 am and sunset at 6:46 pm CDT.
Sunshine
In September, the average sunshine in Joy, Illinois, is 9.5h.UV index
The average daily maximum UV index in September in Joy is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 4 in September translates into these instructions:
Be vigilant - Preventing sunburn is recommended. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Joy, IL
- Average high temperature in September: 75.4°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).
Average pressure in September
Joy, 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
Joy, IL
- Average wind speed in September: 7.8mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in September
Joy, IL
- Average humidity in September: 76%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Joy, IL
- Average rainfall in September: 1.46"
The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is December (0.67").
Average rainfall days in September
Joy, IL
- Average rainfall days in September: 9.7 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (4.1 days).
Average snowfall in September
Joy, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.4").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Joy, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.8 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
Joy, IL
- Average daylight in September: 12h and 30min
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 18min).
- Average sunshine in September: 9h and 30min
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 12min).
Average sunshine days in September
Joy, IL
- Average sunshine days in September: 19 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is May (12.1 days).
Average UV index in September
Joy, 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
Joy, IL
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 29).
Average visibility in September
Joy, IL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
