September weather forecastKeyport, NJ
September
Weather in September
September, the first month of the autumn in Keyport, is still a warm month, with an average temperature varying between 74.5°F (23.6°C) and 62.4°F (16.9°C).Temperature
Keyport, New Jersey, in September experiences a gentle temperature dip, with average high-temperatures reducing from 81.1°F (27.3°C) in August to a still moderately hot 74.5°F (23.6°C). Keyport experiences a consistent average temperature of 62.4°F (16.9°C) throughout the nights in September.Humidity
In Keyport, the average relative humidity in September is 75%.Rainfall
In September, the rain falls for 13.5 days. Throughout September, 1.77" (45mm) of precipitation is accumulated. In Keyport, during the entire year, the rain falls for 153 days and collects up to 28.7" (729mm) of precipitation.Snowfall
In Keyport, snow does not fall in May through October.Ocean temperature
In September, the average ocean temperature is 70.3°F (21.3°C).Note: For most people, swimming in water at 70.3°F (21.3°C) is not a pleasurable experience. Breathing control gets harder as the water temperature descends from 69.8°F (21°C) to 59°F (15°C).
Daylight
In Keyport, the average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 6:24 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:40 pm EDT.
Sunshine
In September, the average sunshine is 8.9h.UV index
In Keyport, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: A daily maximum UV index of 5 in September translates into the following instructions:
Take necessary precautions - Protection from skin and eye injury is mandatory. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Heads up! Sand and water reflection magnifies the UV exposure from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Keyport, NJ
- Average high temperature in September: 74.5°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in September: 62.4°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).
Average pressure in September
Keyport, 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
Keyport, NJ
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in September
Keyport, NJ
- Average humidity in September: 75%
The months with the highest relative humidity are May and June (77%).
The months with the lowest relative humidity are March, April, August and November (73%).
Average rainfall in September
Keyport, NJ
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is July (3.43").
The driest month (with the least rainfall) is January (1.61").
Average rainfall days in September
Keyport, NJ
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in September
Keyport, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is March (2.48").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Keyport, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Keyport, NJ
- Average sea temperature in September: 70.4°F
The best month for swimming (with the highest average sea temperature) is August (74.8°F).
The coldest month (with the lowest average sea temperature) is February (40.4°F).
Average daylight in September /
Average sunshine in September
Keyport, 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 18min).
- Average sunshine in September: 8h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Keyport, NJ
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is July (11.5 days).
Average UV index in September
Keyport, 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, March, November and December (UV index 2).
Average cloud cover in September
Keyport, NJ
- Average cloud cover in September: 35
The months with the most cloud cover are February, March and December (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in September
Keyport, 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).
