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 transition into September is accompanied by a slight temperature decrease, with the average high-temperature shifting from a warm 81.5°F (27.5°C) in August to a still moderately hot 74.5°F (23.6°C). During September, the nighttime temperature in Cedar Knolls averages of 57.2°F (14°C).Humidity
In September, the average relative humidity is 77%.Rainfall
The months with the least rainfall in Cedar Knolls are January, February and September Rain falls for 12.9 days and accumulates 1.57" (40mm) of rain.Snowfall
June through October are months without snowfall.Daylight
In Cedar Knolls, 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 Cedar Knolls, sunrise is at 6:54 am and sunset at 6:41 pm EDT.
Sunshine
In Cedar Knolls, the average sunshine in September is 8.5h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index of 4 during September translates into the following directions:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. It's recommended to limit sun exposure when its radiation is at its peak during midday. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Frequently asked questions
What is the temperature in September in Cedar Knolls?
What is the average humidity in September in Cedar Knolls?
What is the driest month in Cedar Knolls?
How much does it rain in Cedar Knolls in September?
When it does not snow in Cedar Knolls?
What is the average length of the day in September in Cedar Knolls?
When are sunrise and sunset in September in Cedar Knolls?
How long on average sun shines in September in Cedar Knolls?
What is the UV index reading in September in Cedar Knolls?
Average temperature in September
Cedar Knolls, 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 (34.9°F).
- Average low temperature in September: 57.2°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
Cedar Knolls, 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
Cedar Knolls, 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
Cedar Knolls, NJ
- Average humidity in September: 77%
The months with the highest relative humidity are February, October and December (80%).
The month with the lowest relative humidity is April (74%).
Average rainfall in September
Cedar Knolls, NJ
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is July (3.19").
The driest months (with the least rainfall) are January, February and September (1.57").
Average rainfall days in September
Cedar Knolls, NJ
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in September
Cedar Knolls, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is March (3.7").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Cedar Knolls, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.8 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
Cedar Knolls, 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 3min
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
Cedar Knolls, NJ
- Average sunshine days in September: 15 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is July (10.9 days).
Average UV index in September
Cedar Knolls, 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
Cedar Knolls, NJ
- Average cloud cover in September: 40
The months with the most cloud cover are February, March and December (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in September
Cedar Knolls, NJ
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, July, August, October, November and December (6mi).
The months with the lowest visibility are May, June and September (5mi).
Cedar Knolls, New Jersey, USA
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