Manhattan is warmest in July, averaging 30° by day and 20° at night. The wettest month is July with 143 mm, and the year brings about 1266 mm in total.
Month by month
| Month | High | Low | Rain | Sea | Daylight | Good for |
|---|---|---|---|---|---|---|
| January | 4° | -6° | 99 mm | 5° | 9.4 h | Cool |
| February | 5° | -5° | 73 mm | 4° | 10.4 h | Cool |
| March | 10° | -2° | 115 mm | 5° | 11.7 h | Cool |
| April | 15° | 4° | 117 mm | 9° | 13.1 h | Mild |
| May | 20° | 10° | 87 mm | 14° | 14.3 h | Sightseeing |
| June | 26° | 15° | 69 mm | 19° | 14.9 h | Beach weather |
| July | 30° | 20° | 143 mm | 23° | 14.7 h | Mild |
| August | 29° | 19° | 118 mm | 24° | 13.6 h | Mild |
| September | 25° | 15° | 135 mm | 22° | 12.3 h | Mild |
| October | 19° | 9° | 102 mm | 18° | 10.9 h | Sightseeing |
| November | 12° | 2° | 84 mm | 13° | 9.7 h | Mild |
| December | 6° | -2° | 124 mm | 8° | 9.1 h | Cool |
High and low are average daily maximum and minimum, rain is typical monthly total, sea is the average surface temperature, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER and NOAA MUR — averages, not promises.
When to go
Beach weather: June — highs around 26°, nights no colder than 15°, and at most 69 mm of rain in a month. The sea sits at 19–19° then.
Walking the city: May and October — highs of 19–20° and no more than 102 mm of rain a month.