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 is marked by a subtle drop in average high-temperatures, transitioning from a moderately hot 76.1°F (24.5°C) in August to a pleasant 69.1°F (20.6°C). In September, Rockdale experiences an average nighttime temperature of 49.3°F (9.6°C).Humidity
In September, the average relative humidity is 81%.Rainfall
September is the month with the least rainfall. Rain falls for 10.8 days and accumulates 1.1" (28mm) of precipitation.Snowfall
In Rockdale, snow does not fall in June through September.Daylight
In Rockdale, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:27 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:44 pm EDT.
Sunshine
In September, the average sunshine is 8.3h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 3 in September translates into this advice:
Put precautions into practice - Protective measures against sun-induced damage are advised. To protect against the Sun's most potent rays, avoid direct exposure around midday. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
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?
What is the driest month?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Rockdale have 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
Rockdale, NY
- Average high temperature in September: 69.1°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (26.8°F).
- Average low temperature in September: 49.3°F
The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).
Average pressure in September
Rockdale, NY
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Rockdale, NY
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Rockdale, NY
- Average humidity in September: 81%
The month with the highest relative humidity is February (88%).
The month with the lowest relative humidity is July (79%).
Average rainfall in September
Rockdale, NY
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is August (2.05").
The driest month (with the least rainfall) is September (1.1").
Average rainfall days in September
Rockdale, NY
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in September
Rockdale, NY
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Rockdale, NY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (18.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Rockdale, NY
- 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 6min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 2h and 30min).
Average sunshine days in September
Rockdale, NY
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is September (16.3 days).
The month with the least sunshine days is February (7.1 days).
Average UV index in September
Rockdale, NY
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are February, November and December (UV index 1).
Average cloud cover in September
Rockdale, NY
- Average cloud cover in September: 42
The month with the most cloud cover is February (Cloud cover 75).
The month with the least cloud cover is July (Cloud cover 40).
Average visibility in September
Rockdale, NY
- Average visibility in September: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).
Rockdale, New York, USA
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