September weather forecastRockwood, NJ
September
Weather in September
September, the first month of the autumn in Rockwood, is still a warm month, with temperature in the range of an average high of 76.3°F (24.6°C) and an average low of 62.2°F (16.8°C).Temperature
September brings a slight decrease in temperature, down from 82.8°F (28.2°C) in August to a still moderately hot 76.3°F (24.6°C). Rockwood, in September, observes a steady average low-temperature of 62.2°F (16.8°C).Humidity
The average relative humidity in September in Rockwood, New Jersey, is 78%.Rainfall
In September, in Rockwood, the rain falls for 9.2 days. Throughout September, 0.71" (18mm) of precipitation is accumulated. In Rockwood, during the entire year, the rain falls for 115 days and collects up to 12.44" (316mm) of precipitation.Snowfall
April, June through October are months without snowfall.Daylight
The average length of the day in September in Rockwood, New Jersey, is 12h and 26min.On the first day of September in Rockwood, sunrise is at 6:27 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:42 pm EDT.
Sunshine
In September, the average sunshine in Rockwood is 9.1h.UV index
In Rockwood, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 5 during September leads to these advisories:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rockwood, NJ
- Average high temperature in September: 76.3°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in September: 62.2°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).
Average pressure in September
Rockwood, NJ
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Rockwood, NJ
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
Rockwood, NJ
- Average humidity in September: 78%
The month with the highest relative humidity is June (79%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
Rockwood, NJ
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is July (1.54").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in September
Rockwood, NJ
- Average rainfall days in September: 9.2 days
The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is November (6.7 days).
Average snowfall in September
Rockwood, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.06").
The months with the least snowfall are April, June, July, August, September and October (0").
Average snowfall days in September
Rockwood, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.7 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Rockwood, NJ
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 9h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in September
Rockwood, NJ
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is November (22.1 days).
The month with the least sunshine days is July (14.3 days).
Average UV index in September
Rockwood, NJ
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Rockwood, NJ
- Average cloud cover in September: 33
The months with the most cloud cover are February and March (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility in September
Rockwood, NJ
- 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).
