Monthly climate guide
New York weather in September
Expect warm weather in New York in September: afternoons reach about 23°C (74°F), while nights drop to around 18°C (65°F). Around 92 mm of rain falls over the month (wet), and skies are a mix of sun and cloud. Daytime highs are 3°C cooler than August and 5°C warmer than October.
What stands out in September
- Temperatures are falling — expect highs around 5°C lower by October.
- New York is usually about 3°C cooler than Philadelphia, 130 km away, in September.
- Days and nights are close, only about 5°C apart.
- September is New York's third warmest month.
It's usually the driest month of the year.
Avg high
23°C
74°F
Avg low
18°C
65°F
Rainfall
92 mm
wet
Humidity
78%
relative
Sky
54%
cloud · a mix of sun and cloud
New York weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 4°C / 38°F | -1°C / 29°F | 124 mm | 82% | 61% |
| February | 4°C / 40°F | -1°C / 30°F | 116 mm | 82% | 63% |
| March | 7°C / 44°F | 2°C / 35°F | 117 mm | 80% | 59% |
| April | 12°C / 53°F | 6°C / 43°F | 109 mm | 82% | 63% |
| May | 17°C / 63°F | 12°C / 53°F | 118 mm | 85% | 65% |
| June | 22°C / 72°F | 17°C / 63°F | 110 mm | 83% | 58% |
| July | 27°C / 80°F | 22°C / 71°F | 133 mm | 80% | 55% |
| August | 26°C / 79°F | 21°C / 70°F | 135 mm | 78% | 53% |
| September | 23°C / 74°F | 18°C / 65°F | 92 mm | 78% | 54% |
| October | 18°C / 64°F | 13°C / 55°F | 126 mm | 78% | 57% |
| November | 12°C / 53°F | 6°C / 43°F | 117 mm | 79% | 55% |
| December | 7°C / 45°F | 3°C / 37°F | 155 mm | 83% | 67% |
What to pack for September
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is September a good time to visit New York?
Our New York guide recommends: April to June or September to November, avoiding the humid peak of summer and the coldest weeks of winter.
Get a 7-day unlimited MetroCard (or use contactless tap) if you're staying more than a couple of days — it's far cheaper than single rides.
Best time to visit New York →Other United States cities in September
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New York weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/usa/new-york/september
<a href="https://weathercompare.eu/weather/usa/new-york/september">New York weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/usa/new-york" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="New York weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/usa/new-york/september">New York weather in September</a> – WeatherCompare</p>
New York in September: quick answers
Is September a good time to visit New York?
Yes. September is one of the best months for New York, with highs around 23°C and about 92 mm of rain.
How warm is New York in September?
Average highs are about 23°C (74°F) and average lows about 18°C (65°F), based on 10 years of daily data.
Does it rain a lot in New York in September?
New York typically gets around 92 mm of rain in September — wet. It's usually the driest month of the year.
When is the best time to visit New York?
April to June or September to November, avoiding the humid peak of summer and the coldest weeks of winter.
Figures are long-term averages for the area around New York (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.