September weather forecastMount Holly, NJ
September
Weather in September
The first month of the autumn, September, is still a warm month in Mount Holly, New Jersey, with an average temperature ranging between max 76.5°F (24.7°C) and min 60.8°F (16°C).Temperature
In Mount Holly, entering September brings a subtle temperature decrement, reducing from August's 83.8°F (28.8°C) to a still warm 76.5°F (24.7°C). Throughout September, Mount Holly experiences a low-temperature average of 60.8°F (16°C).Humidity
In Mount Holly, the average relative humidity in September is 76%.Rainfall
In September, in Mount Holly, New Jersey, the rain falls for 9.9 days. Throughout September, 0.71" (18mm) of precipitation is accumulated. Throughout the year, in Mount Holly, there are 120.1 rainfall days, and 11.81" (300mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall in Mount Holly, New Jersey.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September in Mount Holly, sunrise is at 6:27 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:42 pm EDT.
Sunshine
In September, the average sunshine is 8.8h.UV index
In Mount Holly, New Jersey, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the UV index of 5 transforms into the following advice:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mount Holly, NJ
- Average high temperature in September: 76.5°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.8°F).
- Average low temperature in September: 60.8°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (25.5°F).
Average pressure in September
Mount Holly, 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 (29.93"Hg).
Average wind speed in September
Mount Holly, NJ
- Average wind speed in September: 6.2mph
The windiest months (with the highest average wind speed) are March and April (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Mount Holly, NJ
- Average humidity in September: 76%
The month with the highest relative humidity is October (78%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
Mount Holly, NJ
- Average rainfall in September: 0.71"
The wettest months (with the highest rainfall) are July and August (1.42").
The driest month (with the least rainfall) is January (0.63").
Average rainfall days in September
Mount Holly, NJ
- Average rainfall days in September: 9.9 days
The month with the highest number of rainy days is July (14.2 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in September
Mount Holly, NJ
- Average snowfall in September: 0"
The months with the highest snowfall are February and March (0.94").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Mount Holly, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.9 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
Mount Holly, NJ
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in September
Mount Holly, NJ
- Average sunshine days in September: 17 days
The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is July (13 days).
Average UV index in September
Mount Holly, 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
Mount Holly, NJ
- Average cloud cover in September: 37
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Mount Holly, 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).
