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
The arrival of September is marked by a minor reduction in average high-temperature, sliding from 82.9°F (28.3°C) in August to a still warm 75.4°F (24.1°C). In Rockleigh, September is marked by an average low-temperature of 59.9°F (15.5°C).Humidity
In September, the average relative humidity in Rockleigh is 73%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.6 days and typically collects 1.73" (44mm) of precipitation.Snowfall
In Rockleigh, snow does not fall in May through October.Daylight
The average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:23 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:38 pm EDT.
Sunshine
In September, the average sunshine in Rockleigh is 8.6h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 4 during September translates into the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Frequently asked questions
What is the average September temperature in Rockleigh?
What is the average humidity in September in Rockleigh?
What is the driest month in Rockleigh?
How many days does it rain in September in Rockleigh?
When it does not snow in Rockleigh?
What is the average length of the day in September in Rockleigh?
When is the sunrise / sunset in September in Rockleigh?
How long on average sun shines in September in Rockleigh?
What is the UV index reading in September in Rockleigh?
Average temperature in September
Rockleigh, NJ
- Average high temperature in September: 75.4°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in September: 59.9°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (24.1°F).
Average pressure in September
Rockleigh, NJ
- 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
Rockleigh, NJ
- Average wind speed in September: 6.3mph
The windiest months (with the highest average wind speed) are January and March (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in September
Rockleigh, NJ
- Average humidity in September: 73%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is August (68%).
Average rainfall in September
Rockleigh, NJ
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is December (3.46").
The driest month (with the least rainfall) is September (1.73").
Average rainfall days in September
Rockleigh, NJ
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in September
Rockleigh, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is March (3.07").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Rockleigh, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Rockleigh, NJ
- Average daylight in September: 12h and 3min
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: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Rockleigh, NJ
- Average sunshine days in September: 16.7 days
The months with the most sunshine days are January and November (18.1 days).
The months with the least sunshine days are April and June (12.7 days).
Average UV index in September
Rockleigh, NJ
- Average UV index in September: 4
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, November and December (UV index 2).
Average cloud cover in September
Rockleigh, NJ
- Average cloud cover in September: 37
The months with the most cloud cover are February, March and December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Rockleigh, 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).
Rockleigh, New Jersey, USA
Weather forecast for your location
2. Allow the app to use your location
