New York Weather in September
United States · Humid Continental climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
September in New York sees average temperatures ranging from a low of 16.0°C (60.8°F) to a high of 24.6°C (76.3°F), with a mean of 20.0°C (68.0°F). Compared to the annual average of 12.8°C (55.0°F), this month is 7.2°C warmer than the yearly norm. Precipitation averages 135.8mm, making it approximately 22.0mm wetter than the monthly average of 114.0mm. The city receives an average of 9.1 hours of sunshine per day during September, with relative humidity averaging 73.7%. Wind speeds reach an average maximum of 19.5 km/h. For travelers, this month offers a temperature experience in New York, with wetter-than-average conditions compared to the rest of the year.
There's something about New York in October — the city wears autumn like a costume. Central Park becomes a canvas of red and gold, and there's a crispness in the air that makes walking feel like a gift. I've visited in every season, and while summer's energy is infectious, it's the shoulder seasons — May and October — that reveal the city's true character. Winter is brutally cold, but the empty museum lines almost make it worth it.
September vs Adjacent Months
| Metric | August | September | October |
|---|---|---|---|
| Mean Temp | 24.0°C (75.2°F) | 20.0°C (68.0°F) | 14.6°C (58.3°F) |
| Rainfall | 134.4mm | 135.8mm | 146.6mm |
| Sunshine | 10.7 hrs | 9.1 hrs | 8.1 hrs |
| Humidity | 73.7% | 73.7% | 73.8% |
| Wind | 19.9 km/h | 19.5 km/h | 19.8 km/h |
| Rainy Days | 18.0 | 12.2 | 13.2 |
Seasonal Context
September falls in Autumn in the Northern Hemisphere. Autumn sees temperatures gradually cooling from summer highs. For travelers visiting New York in September, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in New York in September?
The average temperature in New York during September ranges from 16.0°C (60.8°F) to 24.6°C (76.3°F), with a mean of 20.0°C (68.0°F).
How much does it rain in New York in September?
New York receives an average of 135.8mm of precipitation in September, spread across approximately 12.2 rainy days.
What should I pack for New York in September?
Based on September weather data, pack layers including light jackets and t-shirts, plus an umbrella. Rain gear is essential — this month averages 135.8mm of precipitation.
Is September a good time to visit New York?
September is a month with challenging conditions. Plan activities carefully and stay hydrated.
Other Months for New York
Cities with Similar September Climate (Humid Continental)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 40.71°, -74.01°. Timezone: America/New_York. Last updated: 2026-07-30.