How warm is it in New York in September?

Daytime highs averaged 23.3 °C, night-time lows 18.3 °C. The highest value of the past 10 years was 31.1 °C (6 Sep 2023), the lowest 11.5 °C (24 Sep 2022).

How often does it rain in New York in September?

On average there were 10.3 rain days (at least 1 mm) with 123 mm of precipitation in total.

🇺🇸 Weather in New York in September

This is what the weather in New York (USA) was like in September in 2017–2026.

Key facts at a glance

Prevailing weather: Sunny

Avg. daytime high

23.3 °C

22.8 °C – 23.8 °C

Avg. night-time low

18.3 °C

17.6 °C – 19.6 °C

Avg. rain days in period

10.3

34 % of days · ≥ 1.0 mm

Avg. precipitation in period

123 mm

19.9 mm – 308 mm

Avg. sunshine per day

n/a

Sunshine duration is not available from this data source.

Avg. sea temperature

–

Sea temperature unavailable for today (daily limit).

Extremes: Highest temperature 31.1 °C (6 Sep 2023) · Lowest temperature 11.5 °C (24 Sep 2022) · Avg. daily peak wind 24 km/h

Weather mix of all days

70Sunny
63Partly cloudy
46Cloudy
49Light rain
54Rain

Summary

On average 23.3 °C during the day and 18.3 °C at night.
On average 10.3 rain days (Rain day = at least 1.0 mm of precipitation) with 123 mm of precipitation in total.
Prevailing: Sunny.
Warmest year: 2022 (avg. 23.8 °C), coolest: 2024 (avg. 22.8 °C).
Wettest year: 2023 (308 mm), driest: 2024 (19.9 mm).
Extremes: 31.1 °C on 6 Sep 2023 and 11.5 °C on 24 Sep 2022.

Overall values from all 10 years. How is this calculated?

Temperatures per year

Average over your travel period

Precipitation & rain days

Year by year

2026
Avg. max23.2°Avg. min18.5°
Rain days
12 Rain days
Precipitation
174 mm
Avg. sunshine per day
n/a
Sea temperature
–
Max 28.2 °C · Min 13.4 °C
2025
Avg. max23.7°Avg. min18.6°
Rain days
8 Rain days
Precipitation
68.8 mm
Avg. cloud cover
55 % cloudy
Sea temperature
–
Max 27.1 °C · Min 16.0 °C
2024
Avg. max22.8°Avg. min17.9°
Rain days
5 Rain days
Precipitation
19.9 mm
Avg. cloud cover
55 % cloudy
Sea temperature
–
Max 26.2 °C · Min 14.8 °C
2023
Avg. max23.3°Avg. min18.5°
Rain days
18 Rain days
Precipitation
308 mm
Avg. cloud cover
58 % cloudy
Sea temperature
–
Max 31.1 °C · Min 13.8 °C
2022
Avg. max23.8°Avg. min18.2°
Rain days
11 Rain days
Precipitation
127 mm
Avg. cloud cover
49 % cloudy
Sea temperature
–
Max 28.2 °C · Min 11.5 °C
2021
Avg. max23.3°Avg. min18.5°
Rain days
12 Rain days
Precipitation
137 mm
Avg. cloud cover
53 % cloudy
Sea temperature
–
Max 26.5 °C · Min 14.1 °C
2020
Avg. max23.0°Avg. min17.9°
Rain days
9 Rain days
Precipitation
80.3 mm
Avg. cloud cover
52 % cloudy
Sea temperature
–
Max 27.7 °C · Min 11.6 °C
2019
Avg. max23.6°Avg. min18.0°
Rain days
5 Rain days
Precipitation
32.8 mm
Avg. cloud cover
53 % cloudy
Sea temperature
–
Max 26.3 °C · Min 13.2 °C
2018
Avg. max23.4°Avg. min19.6°
Rain days
15 Rain days
Precipitation
221 mm
Avg. cloud cover
72 % cloudy
Sea temperature
–
Max 30.2 °C · Min 15.1 °C
2017
Avg. max23.1°Avg. min17.6°
Rain days
8 Rain days
Precipitation
63.1 mm
Avg. cloud cover
48 % cloudy
Sea temperature
–
Max 27.2 °C · Min 13.3 °C

Frequently asked questions

How warm is it in New York in September?: Daytime highs averaged 23.3 °C, night-time lows 18.3 °C. The highest value of the past 10 years was 31.1 °C (6 Sep 2023), the lowest 11.5 °C (24 Sep 2022).
How often does it rain in New York in September?: On average there were 10.3 rain days (at least 1 mm) with 123 mm of precipitation in total.

Check your exact travel dates

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Data sources

Weather data: Data obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program
Reanalysis (weather model constrained by observations) on a coarse grid of about 50 km. Values represent a large area and can differ from local conditions, especially on islands, coasts and in mountains. No sunshine duration.
Reanalysis (weather model constrained by observations)
Reanalysis values represent a grid cell (approx. 25–50 km) and may differ from local measurements on coasts, islands and in mountains.
Sea temperature: MUR SST data were provided by JPL under support by NASA MEaSUREs program; accessed via NOAA CoastWatch ERDDAP
Daily multi-scale ultra-high resolution (≈ 1 km) analysis of satellite measurements (infrared, microwave) and in-situ data. Represents the foundation temperature below the daily warm surface layer. (Satellite and in-situ analysis)
Place search: Natural Earth (public domain) · GeoNames (CC BY 4.0) / OpenStreetMap (ODbL)