September weather forecastBayonne, NJ
September
Weather in September
September can be described as the transition month from summer to autumn in Bayonne. With an average high temperature of 74.3°F (23.5°C), the town starts to cool down from the heat of the previous months. The change in weather and drop in sea temperature to 70.1°F (21.2°C) begins to introduce the coziness that autumn traditionally brings. Rainfall sees a fall to 1.85" (47mm), while daylight decreases, slowly introducing the shorter days of autumn. Despite these subtle variations, September generally offers a balanced blend of summer warmth and autumn cool.Temperature
The average high-temperature shows a slight dip in September, from August's moderately hot 81.7°F (27.6°C) to a still warm 74.3°F (23.5°C). In the month of September, Bayonne experiences an average low-temperature of 62.4°F (16.9°C).Humidity
In Bayonne, the average relative humidity in September is 74%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.9 days and typically collects 1.85" (47mm) of precipitation.Snowfall
In Bayonne, snow does not fall in May through October.Ocean temperature
In September, the average ocean temperature is 70.2°F (21.2°C).Note: Most people do not enjoy swimming in water that is 70.2°F (21.2°C). Breathing becomes increasingly challenging as the water temperature dips under 69.8°F (21°C).
Daylight
The average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:24 am and sunset at 7:28 pm. On the last day of September, sunrise is at 6:52 am and sunset at 6:39 pm EDT.
Sunshine
In September, the average sunshine is 8.9h.UV index
In Bayonne, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A typical high UV index of 5 in September suggests the following recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. During bright days, sunglasses that offer UVA and UVB defense are recommended. Attention! The reflection of both water and sand can increase the intensity of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Bayonne, NJ
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (36.5°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 (26.1°F).
Average pressure in September
Bayonne, 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
Bayonne, NJ
- Average wind speed in September: 7.4mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in September
Bayonne, NJ
- Average humidity in September: 74%
The months with the highest relative humidity are February, May and December (76%).
The month with the lowest relative humidity is August (72%).
Average rainfall in September
Bayonne, NJ
- Average rainfall in September: 1.85"
The wettest months (with the highest rainfall) are July and December (3.35").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in September
Bayonne, NJ
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is November (9.5 days).
Average snowfall in September
Bayonne, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is March (2.6").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Bayonne, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Bayonne, NJ
- Average sea temperature in September: 70.1°F
The best month for swimming (with the highest average sea temperature) is August (74.1°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).
Average daylight in September /
Average sunshine in September
Bayonne, NJ
- Average daylight in September: 12h and 30min
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 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Bayonne, NJ
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in September
Bayonne, 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
Bayonne, NJ
- Average cloud cover in September: 34
The months with the most cloud cover are February, March and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Bayonne, 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).
