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
Batavia's weather subtly changes with the onset of September, barely falling from 79.3°F (26.3°C) in August to a still warm 73.6°F (23.1°C). Nighttime temperature dips to a mean of 56.3°F (13.5°C) during September.Humidity
In Batavia, Illinois, the average relative humidity in September is 79%.Rainfall
In September, the rain falls for 8.8 days. Throughout September, 0.87" (22mm) of precipitation is accumulated. Throughout the year, there are 120.4 rainfall days, and 12.32" (313mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In Batavia, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:19 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:36 pm CDT.
Sunshine
The average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures 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?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Batavia, IL
- Average high temperature in September: 73.6°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (16°F).
Average pressure in September
Batavia, 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
Batavia, IL
- Average wind speed in September: 7mph
The windiest months (with the highest average wind speed) are January and February (9.8mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
Batavia, IL
- Average humidity in September: 79%
The months with the highest relative humidity are January, February and July (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Batavia, IL
- Average rainfall in September: 0.87"
The wettest month (with the highest rainfall) is May (1.97").
The driest month (with the least rainfall) is February (0.51").
Average rainfall days in September
Batavia, IL
- Average rainfall days in September: 8.8 days
The month with the highest number of rainy days is June (15.5 days).
The month with the least rainy days is January (4.3 days).
Average snowfall in September
Batavia, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.69").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Batavia, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Batavia, IL
- Average daylight in September: 12h and 3min
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 5min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Batavia, IL
- Average sunshine days in September: 19.3 days
The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is June (11.4 days).
Average UV index in September
Batavia, 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
Batavia, IL
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in September
Batavia, 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).
Batavia, Illinois, USA
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