Cape May Weather in September
September in Cape May typically sees daytime highs of 26°C (79°F) and nighttime lows of 17°C (63°F). Rainfall is also possible this month, so it's worth packing an umbrella.
Rainfall in Cape May in September
You can typically expect 9 days of rain this month, averaging around 103 mm (4.1 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Cape May in September
September in Cape May sees highs of 26°C (79°F) and lows of 17°C (63°F) overnight. Overall, the month follows a fairly predictable daily temperature pattern. Nights drop to around 17°C (63°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Average water temperature in September
The water is 22°C (72°F) this month — warm enough that getting in requires no effort at all. Good conditions for swimming, snorkeling, or just floating around.For Cape May itself, May and July generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Cape May's climate page.
Cape May Temperature in September
Min Temperature
17°C (63°F)
Max Temperature
26°C (79°F)
Water Temperature
22°C (72°F)
Chance of Rain
30%
Precipitation
103 mm (4.1 in)
Rainy days
9 days
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Cape May typically drop from around 27°C (81°F) at the start of September to approximately 23°C (73°F) by the end. Nights are pleasant, with lows typically ranging from 13°C (55°F) to 18°C (64°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Cape May in September
Browse day-by-day weather records for Cape May spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Cape May historical weather extremes in September
According to our 49 years of weather records for Cape May, the following extremes were recorded between 1976 and 2025.
- On September 11, 1983, temperatures climbed to 36°C (97°F), marking the warmest September day on record.
- On September 28, 1984, Cape May saw its coldest September day with temperatures maxing out at 12°C (54°F).
- The lowest overnight temperature recorded in September was 4°C (39°F) (September 30, 1992).
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Cape May in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. With water temperatures around 22°C (72°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes.What To Do in Cape May in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Cape May's climate page.
Temperature Rainfall Water Temp
See the full Cape May climate overview or explore weather in the United States of America.
