Yes
you do need a jacket based on the weather in Holtsville, NY, USA 1 second ago
Why? Because it's cool. Pleasantly cool, but cool.
56°F13°C & Clear
Wind is 4 mph7 km/h from the SE, gusting to 7 mph12 km/h
| April 26 | ||||
| 1pm | 56°F14°C | 5 mph8 km/h SE | Clear | |
| 2pm | 57°F14°C | 6 mph10 km/h S | Clear | |
| 3pm | 58°F14°C | 7 mph12 km/h S | Mostly Clear | |
| 4pm | 57°F14°C | 8 mph13 km/h S | Mostly Clear | |
| 5pm | 56°F13°C | 8 mph14 km/h S | Mostly Clear | |
| 6pm | 54°F12°C | 8 mph13 km/h S | Clear | |
| 7pm | 52°F11°C | 8 mph13 km/h S | Clear | |
| 8pm | 48°F9°C | 7 mph11 km/h S | Clear | |
| 9pm | 45°F7°C | 6 mph10 km/h S | Clear | |
| 10pm | 43°F6°C | 6 mph9 km/h S | Clear | |
| 11pm | 42°F5°C | 6 mph9 km/h S | Clear | |
| April 27 | ||||
| 12am | 40°F5°C | 6 mph9 km/h S | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| April 26 | 31°F-0°C | 58°F14°C | 5 mph8 km/h from S | Clear | Clear |
| April 27 | 38°F3°C | 59°F15°C | 8 mph13 km/h from S | Partly Cloudy | Drizzle |
| April 28 | 45°F7°C | 67°F20°C | 9 mph14 km/h from SW | Drizzle | Mostly Cloudy |
| April 29 | 55°F13°C | 78°F26°C | 6 mph10 km/h from E | Partly Cloudy | Partly Cloudy |
| April 30 | 51°F11°C | 66°F19°C | 8 mph14 km/h from E | Drizzle | Mostly Cloudy |
| May 1 | 48°F9°C | 63°F17°C | 7 mph12 km/h from E | Mostly Cloudy | Mostly Cloudy |
| May 2 | 47°F8°C | 64°F18°C | 8 mph12 km/h from S | Mostly Cloudy | Partly Cloudy |
Yes
Low of 37°F3°C, High of 59°F15°CWind: 8 mph13 km/h
Precipitation: None