Click on a day for an hourly weather forecast
The temperatures in Brooklyn in September are comfortable with low of 14°C and and high up to 25°C.
You can expect about 3 to 8 days of rain in Brooklyn during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Brooklyn in September 2025.
If you’re planning to visit Brooklyn in the near future, we highly recommend that you review the 14 day weather forecast for Brooklyn before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 0° / -6° | 8 | 4 | 20 | 102 mm | Awful | Brooklyn in January |
| February | 2° / -6° | 7 | 5 | 17 | 101 mm | Awful | Brooklyn in February |
| March | 8° / -1° | 9 | 13 | 9 | 121 mm | Awful | Brooklyn in March |
| April | 14° / 4° | 10 | 17 | 3 | 148 mm | Bad | Brooklyn in April |
| May | 21° / 9° | 10 | 21 | 0 | 163 mm | Ok | Brooklyn in May |
| June | 26° / 14° | 9 | 21 | 0 | 190 mm | Good | Brooklyn in June |
| July | 28° / 17° | 9 | 22 | 0 | 161 mm | Good | Brooklyn in July |
| August | 28° / 16° | 7 | 24 | 0 | 136 mm | Good | Brooklyn in August |
| September | 25° / 14° | 6 | 24 | 0 | 112 mm | Perfect | Brooklyn in September |
| October | 17° / 8° | 8 | 23 | 0 | 129 mm | Ok | Brooklyn in October |
| November | 10° / 2° | 7 | 17 | 6 | 100 mm | Awful | Brooklyn in November |
| December | 4° / -2° | 8 | 11 | 12 | 109 mm | Awful | Brooklyn in December |