Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September's arrival brings an average high-temperature of a still moderately hot 75.4°F (24.1°C), slightly deviating from August's 80.2°F (26.8°C). An average low-temperature of 56.7°F (13.7°C) is recorded in the month of September.Humidity
The average relative humidity in September is 77%.Rainfall
In September, the rain falls for 11.8 days. Throughout September, 2.2" (56mm) of precipitation is accumulated. Throughout the year, in Washburn, there are 148.8 rainfall days, and 30.94" (786mm) of precipitation is accumulated.Snowfall
In Washburn, snow does not fall in May through September.Daylight
In Washburn, the average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 6:24 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 6:40 pm CDT.
Sunshine
The average sunshine in September is 8.9h.UV index
In Washburn, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 4 during September translates into these guidelines:
Be vigilant - A duty to shield skin and eyes from injury exists. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Washburn have in September?
When are sunrise and sunset in September?
How long on average sun shines in September in Washburn?
What is the UV index reading in September?
Average temperature in September
Washburn, IL
- Average high temperature in September: 75.4°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in September: 56.7°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in September
Washburn, IL
- Average pressure in September: 30.03"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
Washburn, IL
- Average wind speed in September: 7.7mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in September
Washburn, IL
- Average humidity in September: 77%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Washburn, IL
- Average rainfall in September: 2.2"
The wettest month (with the highest rainfall) is May (4.57").
The driest month (with the least rainfall) is January (1.57").
Average rainfall days in September
Washburn, IL
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is May (19.1 days).
The month with the least rainy days is February (5.5 days).
Average snowfall in September
Washburn, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.62").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Washburn, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.4 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
Washburn, IL
- Average daylight in September: 12h and 3min
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: 8h and 5min
The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Washburn, IL
- Average sunshine days in September: 16 days
The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (9.8 days).
Average UV index in September
Washburn, 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
Washburn, IL
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in September
Washburn, 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).
Washburn, Illinois, USA
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