No
you don't need a jacket based on the weather in Holtsville, NY, USA 1 second ago
73°F23°C & Cloudy
Wind is 4 mph6 km/h from the N, gusting to 10 mph16 km/h
| July 26 | ||||
| 11pm | 73°F23°C | 4 mph7 km/h N | Mostly Cloudy | |
| July 27 | ||||
| 12am | 71°F22°C | 4 mph7 km/h N | Mostly Cloudy | |
| 1am | 70°F21°C | 5 mph7 km/h N | Partly Cloudy | |
| 2am | 69°F20°C | 5 mph8 km/h N | Mostly Clear | |
| 3am | 68°F20°C | 5 mph8 km/h N | Clear | |
| 4am | 67°F19°C | 5 mph8 km/h N | Clear | |
| 5am | 66°F19°C | 5 mph8 km/h N | Clear | |
| 6am | 66°F19°C | 5 mph8 km/h N | Clear | |
| 7am | 68°F20°C | 5 mph8 km/h N | Clear | |
| 8am | 71°F22°C | 5 mph8 km/h N | Clear | |
| 9am | 75°F24°C | 6 mph9 km/h N | Clear | |
| 10am | 78°F25°C | 5 mph9 km/h NE | Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| July 26 | 63°F17°C | 82°F28°C | 5 mph7 km/h from N | Mostly Clear | Partly Cloudy |
| July 27 | 66°F19°C | 85°F29°C | 5 mph8 km/h from NE | Clear | Mostly Clear |
| July 28 | 67°F19°C | 84°F29°C | 5 mph9 km/h from E | Partly Cloudy | Mostly Cloudy |
| July 29 | 68°F20°C | 82°F28°C | 6 mph10 km/h from S | Mostly Cloudy | Partly Cloudy |
| July 30 | 70°F21°C | 85°F29°C | 12 mph19 km/h from S | Partly Cloudy | Mostly Cloudy |
| July 31 | 72°F22°C | 81°F27°C | 11 mph18 km/h from S | Drizzle | Drizzle |
| August 1 | 71°F22°C | 83°F28°C | 6 mph10 km/h from SW | Rain | Rain |
No
Low of 65°F19°C, High of 85°F30°CWind: 5 mph8 km/h
Precipitation: None