September weather forecastCape May, NJ
September
Weather in September
September in Cape May marks the transition from summer to fall, with temperatures progressively dropping from the summer peaks. A reduction in sea temperature from August is noted, indicating less favorable conditions for sea related activities. However, the drop in humidity levels from August signifies a more comfortable atmosphere. As the daylight hours reduce, rainfall decreases significantly. The approach of October begins the shift towards a different weather phase.Temperature
With the arrival of September, Cape May's average high-temperature registers at a still moderately hot 73.4°F (23°C), indicating a subtle variation from the previous month. Cape May maintains a near steady average temperature of 67.8°F (19.9°C) during the nights of September, demonstrating little drop from daytime highs.Humidity
In September, the average relative humidity is 77%.Rainfall
In Cape May, in September, it is raining for 12.7 days, with typically 2.6" (66mm) of accumulated precipitation. In Cape May, during the entire year, the rain falls for 158 days and collects up to 35.47" (901mm) of precipitation.Snowfall
In Cape May, snow does not fall in April through November.Ocean temperature
In September, the average ocean temperature is 71.6°F (22°C).Note: Your comfort in 71.6°F (22°C) waters hinges on your relationship with the cold, today's sunny disposition, wind patterns, and the air's temperature. For context, Olympic swimmers are no strangers to waters of 77°F (25°C) to 82.4°F (28°C).
Daylight
In Cape May, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:29 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:43 pm EDT.
Sunshine
In September, the average sunshine is 9.4h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: A maximum daily UV index of 5 during September morphs into the following directions:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Stay aware! UV radiation is magnified when reflecting off sand and water.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cape May, NJ
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (40.5°F).
- Average low temperature in September: 67.8°F
The month with the highest average low temperature is July (73.4°F).
The coldest month (with the lowest average low temperature) is January (32.2°F).
Average pressure in September
Cape May, NJ
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Cape May, NJ
- Average wind speed in September: 10.9mph
The windiest month (with the highest average wind speed) is January (13.5mph).
The calmest month (with the lowest average wind speed) is July (9.2mph).
Average humidity in September
Cape May, NJ
- Average humidity in September: 77%
The month with the highest relative humidity is May (82%).
The month with the lowest relative humidity is November (73%).
Average rainfall in September
Cape May, NJ
- Average rainfall in September: 2.6"
The wettest month (with the highest rainfall) is August (3.86").
The driest month (with the least rainfall) is January (2.13").
Average rainfall days in September
Cape May, NJ
- Average rainfall days in September: 12.7 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (8.7 days).
Average snowfall in September
Cape May, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is December (1.06").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Cape May, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in September
Cape May, NJ
- Average sea temperature in September: 72°F
The best month for swimming (with the highest average sea temperature) is August (75°F).
The coldest months (with the lowest average sea temperature) are February and March (43°F).
Average daylight in September /
Average sunshine in September
Cape May, 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 30min).
- Average sunshine in September: 9h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in September
Cape May, NJ
- Average sunshine days in September: 15.2 days
The month with the most sunshine days is November (18.9 days).
The months with the least sunshine days are May and June (12.5 days).
Average UV index in September
Cape May, NJ
- Average UV index in September: 5
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 and December (UV index 2).
Average cloud cover in September
Cape May, NJ
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in September
Cape May, 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).
