No
you don't need a jacket based on the weather in Holtsville, NY, USA 1 second ago
59°F15°C & Clear
Wind is 6 mph10 km/h from the North, gusting to 14 mph22 km/h
| September 12 | ||||
| 6am | 59°F15°C | 7 mph12 km/h Northeast | Clear | |
| 7am | 60°F15°C | 7 mph12 km/h Northeast | Clear | |
| 8am | 63°F17°C | 8 mph13 km/h Northeast | Clear | |
| 9am | 66°F19°C | 9 mph15 km/h Northeast | Clear | |
| 10am | 69°F20°C | 9 mph14 km/h Northeast | Clear | |
| 11am | 71°F22°C | 8 mph13 km/h Northeast | Mostly Clear | |
| 12pm | 73°F23°C | 7 mph12 km/h Northeast | Clear | |
| 1pm | 75°F24°C | 6 mph10 km/h Northeast | Clear | |
| 2pm | 76°F24°C | 6 mph10 km/h Northeast | Clear | |
| 3pm | 76°F25°C | 6 mph9 km/h Northeast | Mostly Clear | |
| 4pm | 76°F24°C | 5 mph8 km/h East | Mostly Clear | |
| 5pm | 75°F24°C | 5 mph8 km/h East | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 12 | 58°F15°C | 76°F25°C | 7 mph11 km/h from Northeast | Mostly Clear | Mostly Clear |
| September 13 | 61°F16°C | 74°F23°C | 7 mph12 km/h from South | Mostly Clear | Partly Cloudy |
| September 14 | 63°F17°C | 78°F25°C | 4 mph7 km/h from Southwest | Mostly Clear | Mostly Clear |
| September 15 | 63°F17°C | 76°F25°C | 7 mph11 km/h from East | Mostly Clear | Mostly Clear |
| September 16 | 61°F16°C | 75°F24°C | 5 mph8 km/h from Southeast | Mostly Clear | Mostly Clear |
| September 17 | 60°F16°C | 75°F24°C | 6 mph10 km/h from South | Partly Cloudy | Mostly Cloudy |
| September 18 | 62°F17°C | 75°F24°C | 6 mph10 km/h from Southeast | Mostly Cloudy | Mostly Cloudy |
No
Low of 61°F16°C, High of 74°F24°CWind: 7 mph12 km/h
Precipitation: 7% rain