Cape May, New Jersey weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Good
Best time to visit: July – August
What is the weather like in Cape May, New Jersey in September?
In September, Cape May, New Jersey is warm: daytime highs average 23 °C, and nights cool down to about 19 °C. The sea averages 22.7 °C – refreshing for a swim. Expect around 6 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 98 mm in total. All in all, September is a good month for a holiday in Cape May, New Jersey.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 86 | 69 | 29 |
| Day | 26° | 23° | 18° |
| Night | 22° | 19° | 14° |
| Sea | 24° | 23° | 19° |
| Sun | 8 h | 6 h | 6 h |
| Rain days | 11 | 10 | 8 |
More details for September
- Daylight
- 12 h 30 min06:40 – 19:10
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 13 daysdew point 18 °C or moreAll months
- Wind
- 21 km/haverage daily peakAll months
- Cloud cover
- 53 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−4America/New_York
How the score comes together
- Temperatureweight 35 %73 %
- Seaweight 25 %81 %
- Sunshineweight 20 %55 %
- Few rainy daysweight 20 %61 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in September
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Rain jacket or umbrella
Cape May, New Jersey in September: quick answers
Is Cape May, New Jersey hot in September?
Warm rather than hot: in September, daytime highs in Cape May, New Jersey average 23 °C and nights cool to about 19 °C.
Can you swim in Cape May, New Jersey in September?
Yes. In September the sea averages 22.7 °C – refreshing for a swim.
Does it rain much in Cape May, New Jersey in September?
Rain is frequent, with about 10 rainy days and 98 mm in total.
Cape May, New Jersey month by month
The whole year in Cape May, New JerseyAll destinations: USAWhere to go in SeptemberSea temperature in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences