Weather in Brooklyn, New York for September 2025
Until now, September 2025 in Brooklyn is cooler than usual, with temperatures averaging 22.9 °F, this is -2.7 °F below the typical seasonal average.
Expect cooler weather in the next days in Brooklyn with the forecast suggesting a temperature of 22.1 °F, lower than the historical average.
In general, the average temperature in Brooklyn at the beginning of September is 26 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.6 °F by the end of September.
Brooklyn in September brings notable rainfall, with an average of 16 rainy days and a total precipitation of 171.2 mm.
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Brooklyn Weather September
Temperatures trend during September in Brooklyn
September weather in Brooklyn day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 26° /19° | 2.3 mm | 6 | |
| Sept. 2 |  Partly cloudy | 27° /18° | 0 mm | 7 | |
| Sept. 3 | Sunny | 25° /17° | 0 mm | 6 | |
| Sept. 4 | Partly cloudy | 26° /19° | 0 mm | 6 | |
| Sept. 5 | Partly cloudy | 27° /21° | 13.4 mm | 7 | |
| Sept. 6 | Partly cloudy | 27° /22° | 23.4 mm | 6 | |
| Sept. 7 |  Light rain shower | 24° /17° | 18.2 mm | 5 | |
| Sept. 8 |  Patchy light rain with thunder | 25° /16° | 1 mm | 6 | |
| Sept. 9 | Partly cloudy | 25° /17° | 1.4 mm | 6 | |
| Sept. 10 | Light rain shower | 24° /18° | 1.5 mm | 6 | |
| Sept. 11 | Light rain shower | 26° /18° | 0.8 mm | 6 | |
| Sept. 12 |  Cloudy | 25° /19° | 0 mm | 6 | |
| Sept. 13 |  Mist | 22° /18° | 0 mm | 1.3 | |
| Sept. 14 | Partly cloudy | 26° /19° | 0 mm | 1.1 | |
| Sept. 15 | Partly cloudy | 24° /19° | 0 mm | 1.3 | |
| Sept. 16 |  Overcast | 24° /16° | 0 mm | 1.4 | |
| Sept. 17 | Patchy rain possible | 21° /20° | 2.2 mm | 0 | |
| Sept. 18 | Patchy rain possible | 20° /18° | 2.7 mm | 4 | |
| Sept. 19 | Patchy rain possible | 26° /19° | 0.2 mm | 5 | |
| Sept. 20 | Patchy rain possible | 25° /21° | 2.1 mm | 5 | |
| Sept. 21 | Patchy rain possible | 20° /18° | 3.5 mm | 4 | |
| Sept. 22 | Patchy rain possible | 21° /17° | 0.5 mm | 4 | |
| Sept. 23 |  Moderate rain | 20° /19° | 7 mm | 4 | |
| Sept. 24 | Patchy rain possible | 24° /19° | 1.2 mm | 5 | |
| Sept. 25 | Partly cloudy | 20° /14° | 0.1 mm | 5 | |
| Sept. 26 | Partly cloudy | 17° /13° | 0 mm | 4 | |
| Sept. 27 | Overcast | 20° /14° | 5.5 mm | 5 | |
| Sept. 28 | Patchy rain possible | 20° /16° | 0 mm | 5 | |
| Sept. 29 |  Moderate or heavy rain shower | 17° /15° | 26.3 mm | 4 | |
| Sept. 30 | Light rain shower | 19° /14° | 10.5 mm | 4 | |
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Brooklyn in September - FAQ
September rainfall patterns in Brooklyn
UV exposure in Brooklyn during September
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