Climate averages 1991–2020
New York City weather
in September.
A warm, wet month: the 4th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in New York City: daytime highs average 23.6°C and nights cool to about 15.6°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 94 mm of rain on roughly 9 days, which makes September a wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 30 min on an average September day.
The nearest other city in this atlas is Manhattan (8 km away). In September its highs average 23.7°C, about as warm as New York City, with 94 mm of rain.
Among the 498 cities listed in the United States, New York City ranks joint 383rd of 498 for the warmest September highs and joint 365th of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; New York City is 3.3°C cooler than that mean.
From September to October, average highs fall by 6.3°C to 17.3°C, and monthly rainfall rises from 94 mm to 97 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
New York City climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 3.1°C-4.8°C | -4.8°C | 81 | 9.1 | 9.610 h |
| February | 4.4°C-4.5°C | -4.5°C | 77 | 8.4 | 10.611 h |
| March | 8.7°C-0.6°C | -0.6°C | 105 | 10.2 | 11.912 h |
| April | 15.0°C5.3°C | 5.3°C | 91 | 10.6 | 13.313 h |
| May | 20.4°C11.0°C | 11.0°C | 85 | 10.9 | 14.414 h |
| June | 25.5°C16.5°C | 16.5°C | 100 | 11.2 | 15.015 h |
| July | 28.5°C19.9°C | 19.9°C | 103 | 11.1 | 14.815 h |
| August | 27.4°C19.2°C | 19.2°C | 101 | 10.4 | 13.814 h |
| September, selected | 23.6°C15.6°C | 15.6°C | 94 | 9.4 | 12.513 h |
| October | 17.3°C9.4°C | 9.4°C | 97 | 8.5 | 11.211 h |
| November | 11.2°C3.5°C | 3.5°C | 77 | 8.0 | 10.010 h |
| December | 5.8°C-1.4°C | -1.4°C | 100 | 9.7 | 9.39 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Manhattan in SeptemberUnited States · 8 kmHigh 23.7°C · Low 15.6°C · 94 mm rain
- Brooklyn in SeptemberUnited States · 9 kmHigh 23.8°C · Low 16.1°C · 94 mm rain
- Newark in SeptemberUnited States · 14 kmHigh 24.2°C · Low 15.6°C · 102 mm rain
- Queens in SeptemberUnited States · 15 kmHigh 23.6°C · Low 16.5°C · 92 mm rain
- Passaic in SeptemberUnited States · 19 kmHigh 23.9°C · Low 15.5°C · 102 mm rain
- The Bronx in SeptemberUnited States · 19 kmHigh 23.8°C · Low 15.7°C · 92 mm rain
- Staten Island in SeptemberUnited States · 20 kmHigh 24.0°C · Low 16.2°C · 95 mm rain
- Yonkers in SeptemberUnited States · 26 kmHigh 23.7°C · Low 15.8°C · 101 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for New York City) is explained once on the New York City year overview and on the Sources, method and limits page.
Brooklyn and Manhattan lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.