September weather forecastOphiem, IL
September
Weather in September
September, the first month of the autumn in Ophiem, is still a warm month, with temperature in the range of an average high of 75.4°F (24.1°C) and an average low of 56.5°F (13.6°C).Temperature
Ophiem experiences a subtle adjustment in high-temperatures to a still moderately hot 75.4°F (24.1°C) with the onset of September, maintaining near parity with August's 80.4°F (26.9°C). Nighttime temperature dips to a mean of 56.5°F (13.6°C) during September.Humidity
In September, the average relative humidity in Ophiem is 76%.Rainfall
In Ophiem, Illinois, during September, the rain falls for 11.1 days and regularly aggregates up to 2.13" (54mm) of precipitation. Throughout the year, there are 143.6 rainfall days, and 27.99" (711mm) of precipitation is accumulated.Snowfall
In Ophiem, snow does not fall in May through September.Daylight
In September, the average length of the day in Ophiem is 12h and 28min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:33 pm. On the last day of September, in Ophiem, sunrise is at 6:58 am and sunset at 6:44 pm CDT.
Sunshine
In Ophiem, the average sunshine in September is 9.3h.UV index
In Ophiem, Illinois, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 4 during September leads to these instructions:
Make use of precautions - It is urged to ward off sun damage. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Ophiem, 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 (28.4°F).
- Average low temperature in September: 56.5°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 (16.2°F).
Average pressure in September
Ophiem, IL
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Ophiem, 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
Ophiem, 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
Ophiem, IL
- Average rainfall in September: 2.13"
The wettest month (with the highest rainfall) is May (4.45").
The driest month (with the least rainfall) is December (1.26").
Average rainfall days in September
Ophiem, IL
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is January (5 days).
Average snowfall in September
Ophiem, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.09").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Ophiem, IL
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (11.2 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Ophiem, 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 18min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Ophiem, IL
- Average sunshine days in September: 17.8 days
The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is May (10.4 days).
Average UV index in September
Ophiem, IL
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Ophiem, 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
Ophiem, 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).
