September weather forecastBrookville, NY
September
Weather in September
September, the first month of the autumn in Brookville, is still a pleasant month, with an average temperature fluctuating between 72.5°F (22.5°C) and 64.8°F (18.2°C).Temperature
September's arrival aligns with a minor decrease in average high-temperatures, from August's moderately hot 79.2°F (26.2°C) to a pleasant 72.5°F (22.5°C). Brookville records a slight downturn in temperature to an average of 64.8°F (18.2°C) during September nights.Humidity
In September, the average relative humidity in Brookville is 73%.Rainfall
September is the month with the least rainfall in Brookville. Rain falls for 8.8 days and accumulates 0.35" (9mm) of precipitation.Snowfall
April through November are months without snowfall in Brookville, New York.Daylight
In September, the average length of the day is 12h and 27min.On the first day of September in Brookville, sunrise is at 6:21 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:37 pm EDT.
Sunshine
In Brookville, the average sunshine in September is 9h.UV index
In September, the average daily maximum UV index in Brookville is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: The daily high UV index of 5 during September translates into the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Brookville, NY
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (37.4°F).
- Average low temperature in September: 64.8°F
The months with the highest average low temperature are July and August (71.2°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).
Average pressure in September
Brookville, NY
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Brookville, NY
- Average wind speed in September: 9.4mph
The windiest month (with the highest average wind speed) is January (12.5mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).
Average humidity in September
Brookville, NY
- Average humidity in September: 73%
The months with the highest relative humidity are May and June (76%).
The month with the lowest relative humidity is November (71%).
Average rainfall in September
Brookville, NY
- Average rainfall in September: 0.35"
The wettest month (with the highest rainfall) is July (0.87").
The driest month (with the least rainfall) is September (0.35").
Average rainfall days in September
Brookville, NY
- Average rainfall days in September: 8.8 days
The month with the highest number of rainy days is July (11.3 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in September
Brookville, NY
- Average snowfall in September: 0"
The month with the highest snowfall is March (0.43").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Brookville, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.4 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
Brookville, NY
- Average daylight in September: 12h and 30min
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: 9h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Brookville, NY
- Average sunshine days in September: 18.6 days
The month with the most sunshine days is January (22.4 days).
The month with the least sunshine days is July (16.9 days).
Average UV index in September
Brookville, NY
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March and December (UV index 2).
Average cloud cover in September
Brookville, NY
- Average cloud cover in September: 32
The month with the most cloud cover is December (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in September
Brookville, NY
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
