September weather forecastCambridge, IL
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Cambridge, Illinois, with an average temperature fluctuating between 56.3°F (13.5°C) and 75.4°F (24.1°C).Temperature
The transition from August to September brings an average high-temperature of a still warm 75.4°F (24.1°C), barely different from August's 80.2°F (26.8°C). Cambridge in September anticipates an average nighttime temperature of 56.3°F (13.5°C).Humidity
In Cambridge, the average relative humidity in September is 76%.Rainfall
In Cambridge, Illinois, during September, the rain falls for 9.9 days and regularly aggregates up to 1.26" (32mm) of precipitation. In Cambridge, during the entire year, the rain falls for 127.7 days and collects up to 17.8" (452mm) of precipitation.Snowfall
In Cambridge, Illinois, snow does not fall in May through September.Daylight
The average length of the day in September is 12h and 28min.On the first day of September in Cambridge, sunrise is at 6:27 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:43 pm CDT.
Sunshine
In September, the average sunshine is 9.4h.UV index
In Cambridge, Illinois, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 4 during September translates into the following directions:
Take necessary precautions - Defending against sun damage is advocated. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cambridge, IL
- Average high temperature in September: 75.4°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (28.2°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 (16.5°F).
Average pressure in September
Cambridge, 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 (29.91"Hg).
Average wind speed in September
Cambridge, 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 (6.6mph).
Average humidity in September
Cambridge, 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 (72%).
Average rainfall in September
Cambridge, IL
- Average rainfall in September: 1.26"
The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is December (0.71").
Average rainfall days in September
Cambridge, IL
- Average rainfall days in September: 9.9 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is January (4 days).
Average snowfall in September
Cambridge, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Cambridge, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.5 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
Cambridge, 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 24min
The months with the most sunshine are June and July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Cambridge, IL
- Average sunshine days in September: 18 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (11.2 days).
Average UV index in September
Cambridge, 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
Cambridge, IL
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in September
Cambridge, 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).
