September weather forecastFlorham Park, NJ
September
Weather in September
The first month of the autumn, September, is still a warm month in Florham Park, New Jersey, with an average temperature varying between 57.6°F (14.2°C) and 74.5°F (23.6°C).Temperature
Florham Park experiences a moderate temperature shift at the start of September, with average high-temperatures adjusting a bit from a moderately hot 81.9°F (27.7°C) in August to a still warm 74.5°F (23.6°C). In September, the nighttime temperature lowers to an average of 57.6°F (14.2°C).Humidity
In September, the average relative humidity is 77%.Rainfall
The month with the least rainfall is September, when the rain falls for 13.5 days and typically collects 1.69" (43mm) of precipitation.Snowfall
In Florham Park, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:25 am and sunset at 7:29 pm. On the last day of September, in Florham Park, sunrise is at 6:53 am and sunset at 6:40 pm EDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In Florham Park, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: A daily maximum UV index of 4 in September translates into the following instructions:
Act with care - The need to guard against sun damage is communicated. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Florham Park, NJ
- Average high temperature in September: 74.5°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (35.1°F).
- Average low temperature in September: 57.6°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in September
Florham Park, NJ
- Average pressure in September: 30.06"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
Florham Park, NJ
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Florham Park, NJ
- Average humidity in September: 77%
The months with the highest relative humidity are February and December (80%).
The months with the lowest relative humidity are April and August (74%).
Average rainfall in September
Florham Park, NJ
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is July (3.27").
The driest month (with the least rainfall) is September (1.69").
Average rainfall days in September
Florham Park, NJ
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is January (8.8 days).
Average snowfall in September
Florham Park, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is March (3.5").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Florham Park, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Florham Park, NJ
- 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: 8h and 30min
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
Florham Park, NJ
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in September
Florham Park, 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
Florham Park, NJ
- Average cloud cover in September: 39
The months with the most cloud cover are February and March (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in September
Florham Park, NJ
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
