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
As September begins, there is a minor decrease in the average high-temperature, softly falling from a moderately hot 77.5°F (25.3°C) in August to a pleasant 71.2°F (21.8°C). Throughout September, Brooklyn witnesses a nighttime temperature average of 52°F (11.1°C).Humidity
In September, the average relative humidity is 81%.Rainfall
In Brooklyn, in September, it is raining for 7.7 days, with typically 0.63" (16mm) of accumulated precipitation. In Brooklyn, during the entire year, the rain falls for 92.1 days and collects up to 7.28" (185mm) of precipitation.Snowfall
In Brooklyn, snow does not fall in May through September.Daylight
In Brooklyn, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:22 am and sunset at 7:31 pm. On the last day of September, sunrise is at 6:54 am and sunset at 6:39 pm CDT.
Sunshine
In Brooklyn, the average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 3 during September translates into the following recommendations:
Undertake protective steps - Preventing sun damage is advised. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Brooklyn 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 many hours of sunshine does Brooklyn have in September?
How high is the UV index in September in Brooklyn?
Average temperature in September
Brooklyn, WI
- Average high temperature in September: 71.2°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (24.3°F).
- Average low temperature in September: 52°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in September
Brooklyn, WI
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Brooklyn, WI
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in September
Brooklyn, WI
- Average humidity in September: 81%
The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall in September
Brooklyn, WI
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is June (0.98").
The driest month (with the least rainfall) is December (0.31").
Average rainfall days in September
Brooklyn, WI
- Average rainfall days in September: 7.7 days
The month with the highest number of rainy days is May (12.8 days).
The month with the least rainy days is February (2.2 days).
Average snowfall in September
Brooklyn, WI
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.14").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Brooklyn, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Brooklyn, WI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 3min
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 18min).
Average sunshine days in September
Brooklyn, WI
- Average sunshine days in September: 19.3 days
The month with the most sunshine days is December (22.6 days).
The month with the least sunshine days is June (14.3 days).
Average UV index in September
Brooklyn, WI
- Average UV index in September: 3
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Brooklyn, WI
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July, August and September (Cloud cover 35).
Average visibility in September
Brooklyn, WI
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, July, August and September (5mi).
Brooklyn, Wisconsin, USA
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