No
you don't need a jacket based on the weather in Horsham, PA, USA 1 second ago
63°F17°C & Mostly Cloudy
Wind is 4 mph6 km/h from the North, gusting to 9 mph14 km/h
| September 18 | ||||
| 6am | 64°F18°C | 4 mph7 km/h North | Cloudy | |
| 7am | 64°F18°C | 3 mph5 km/h North | Cloudy | |
| 8am | 65°F18°C | 3 mph5 km/h North | Partly Cloudy | |
| 9am | 67°F19°C | 2 mph4 km/h North | Mostly Clear | |
| 10am | 70°F21°C | 3 mph5 km/h Northwest | Mostly Clear | |
| 11am | 73°F23°C | 4 mph6 km/h Northwest | Mostly Clear | |
| 12pm | 76°F25°C | 5 mph8 km/h Northwest | Mostly Clear | |
| 1pm | 78°F26°C | 5 mph8 km/h Northwest | Clear | |
| 2pm | 79°F26°C | 5 mph8 km/h West | Clear | |
| 3pm | 80°F27°C | 6 mph9 km/h West | Mostly Clear | |
| 4pm | 81°F27°C | 7 mph11 km/h West | Mostly Clear | |
| 5pm | 81°F27°C | 7 mph11 km/h West | Mostly Clear | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| September 18 | 63°F17°C | 81°F27°C | 5 mph7 km/h from Northwest | Mostly Clear | Clear |
| September 19 | 60°F16°C | 83°F28°C | 5 mph8 km/h from Northwest | Clear | Mostly Clear |
| September 20 | 57°F14°C | 75°F24°C | 8 mph12 km/h from East | Mostly Clear | Mostly Clear |
| September 21 | 56°F13°C | 73°F23°C | 7 mph11 km/h from East | Mostly Cloudy | Partly Cloudy |
| September 22 | 56°F13°C | 76°F25°C | 5 mph8 km/h from South | Partly Cloudy | Partly Cloudy |
| September 23 | 63°F17°C | 82°F28°C | 7 mph11 km/h from Southwest | Mostly Clear | Partly Cloudy |
| September 24 | 65°F19°C | 81°F27°C | 4 mph7 km/h from Northwest | Partly Cloudy | Mostly Cloudy |
No
Low of 60°F16°C, High of 83°F29°CWind: 5 mph8 km/h
Precipitation: None