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
Serena ushers in September with an average high-temperature of a still moderately hot 74.5°F (23.6°C), showing a close resemblance to the previous month. Throughout September, the temperature in Serena tends to fall to a consistent average low of 56.1°F (13.4°C).Humidity
In Serena, the average relative humidity in September is 78%.Rainfall
In Serena, in September, it is raining for 7.5 days, with typically 0.63" (16mm) of accumulated precipitation. In Serena, during the entire year, the rain falls for 97.4 days and collects up to 8.07" (205mm) of precipitation.Snowfall
In Serena, snow does not fall in May through September.Daylight
In Serena, 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
In September, the average sunshine is 8.8h.UV index
In September, the average daily maximum UV index in Serena is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Take measures. Individuals with light skin might experience burns in under 30 minutes. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Serena in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When is the sunrise / sunset in September in Serena?
How many hours of sunshine does Serena have in September?
How high is the UV index in September?
Average temperature in September
Serena, IL
- Average high temperature in September: 74.5°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in September: 56.1°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in September
Serena, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
Serena, IL
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is April (10mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
Serena, IL
- Average humidity in September: 78%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Serena, IL
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is May (1.14").
The driest month (with the least rainfall) is November (0.35").
Average rainfall days in September
Serena, IL
- Average rainfall days in September: 7.5 days
The month with the highest number of rainy days is May (13.5 days).
The month with the least rainy days is January (3 days).
Average snowfall in September
Serena, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.98").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Serena, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Serena, 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 12min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Serena, IL
- Average sunshine days in September: 20 days
The month with the most sunshine days is December (23 days).
The month with the least sunshine days is May (14.7 days).
Average UV index in September
Serena, IL
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Serena, IL
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 33).
Average visibility in September
Serena, 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).
Serena, Illinois, USA
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