September weather forecastBerlin, IL
September
Weather in September
The first month of the autumn, September, is still a warm month in Berlin, Illinois, with an average temperature ranging between min 58.8°F (14.9°C) and max 77.5°F (25.3°C).Temperature
In the transition from August to September, Berlin reports an average high-temperature of a still moderately hot 77.5°F (25.3°C), indicating a close resemblance to the prior month. An average nighttime temperature of 58.8°F (14.9°C) is recorded in Berlin during September.Humidity
In Berlin, the average relative humidity in September is 75%.Rainfall
In Berlin, during September, the rain falls for 10.9 days and regularly aggregates up to 1.77" (45mm) of precipitation. In Berlin, Illinois, during the entire year, the rain falls for 126.6 days and collects up to 17.95" (456mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:30 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:43 pm CDT.
Sunshine
The average sunshine in September is 9.3h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: A maximum high UV index of 5 in September translates into the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Berlin, IL
- Average high temperature in September: 77.5°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in September: 58.8°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure in September
Berlin, IL
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Berlin, IL
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in September
Berlin, IL
- Average humidity in September: 75%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Berlin, IL
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is June (2.36").
The driest months (with the least rainfall) are February and December (0.79").
Average rainfall days in September
Berlin, IL
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (5.2 days).
Average snowfall in September
Berlin, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.57").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Berlin, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.6 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
Berlin, IL
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 9h and 18min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in September
Berlin, IL
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is July (12.9 days).
Average UV index in September
Berlin, IL
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Berlin, IL
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in September
Berlin, IL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
