September weather forecastWaterman, IL
September
Weather in September
September, the first month of the autumn in Waterman, is still a warm month, with an average temperature fluctuating between 73.8°F (23.2°C) and 55.4°F (13°C).Temperature
September's arrival brings an average high-temperature of a still moderately hot 73.8°F (23.2°C), demonstrating subtle variation from the preceding month. An average low-temperature of 55.4°F (13°C) is recorded in the month of September in Waterman.Humidity
The average relative humidity in September is 80%.Rainfall
In Waterman, during September, the rain falls for 13.7 days and regularly aggregates up to 2.28" (58mm) of precipitation. In Waterman, during the entire year, the rain falls for 158.9 days and collects up to 32.52" (826mm) of precipitation.Snowfall
In Waterman, Illinois, snow does not fall in May through September.Daylight
In Waterman, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:21 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 6:37 pm CDT.
Sunshine
The average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September in Waterman is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 4 during September translates into the following directions:
Undertake precautions - It is suggested to shield oneself from sunburn. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Waterman, IL
- Average high temperature in September: 73.8°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (27.5°F).
- Average low temperature in September: 55.4°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).
Average pressure in September
Waterman, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Waterman, IL
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
Waterman, IL
- Average humidity in September: 80%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Waterman, IL
- Average rainfall in September: 2.28"
The wettest month (with the highest rainfall) is May (4.41").
The driest months (with the least rainfall) are November and December (1.69").
Average rainfall days in September
Waterman, IL
- Average rainfall days in September: 13.7 days
The month with the highest number of rainy days is July (19.2 days).
The months with the least rainy days are January and February (5.3 days).
Average snowfall in September
Waterman, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (5").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Waterman, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Waterman, IL
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 42min
The months with the most sunshine are June, July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Waterman, IL
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is July (8.5 days).
Average UV index in September
Waterman, IL
- Average UV index in September: 4
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Waterman, IL
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 34).
Average visibility in September
Waterman, IL
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
