No
you don't need a jacket based on the weather in Chalfont, PA 18914, USA 1 second ago
65°F18°C & Partly Cloudy
Wind is 2 mph3 km/h from the Northwest, gusting to 4 mph7 km/h
| May 8 | ||||
| 9am | 66°F19°C | 2 mph3 km/h North | Mostly Clear | |
| 10am | 69°F21°C | 3 mph4 km/h North | Mostly Clear | |
| 11am | 72°F22°C | 3 mph4 km/h Northwest | Mostly Clear | |
| 12pm | 74°F23°C | 4 mph6 km/h West | Mostly Clear | |
| 1pm | 76°F24°C | 5 mph7 km/h West | Partly Cloudy | |
| 2pm | 77°F25°C | 5 mph8 km/h West | Partly Cloudy | |
| 3pm | 78°F25°C | 5 mph8 km/h West | Partly Cloudy | |
| 4pm | 77°F25°C | 6 mph9 km/h West | Mostly Cloudy | |
| 5pm | 76°F25°C | 5 mph9 km/h West | Partly Cloudy | |
| 6pm | 74°F23°C | 5 mph9 km/h Northwest | Mostly Cloudy | |
| 7pm | 72°F22°C | 6 mph10 km/h North | Partly Cloudy | |
| 8pm | 68°F20°C | 7 mph11 km/h North | Partly Cloudy | |
| Date | Low | High | Wind | Day | Night |
|---|---|---|---|---|---|
| May 8 | 53°F12°C | 78°F25°C | 4 mph6 km/h from West | Partly Cloudy | Rain |
| May 9 | 52°F11°C | 62°F17°C | 7 mph11 km/h from Northeast | Rain | Rain |
| May 10 | 48°F9°C | 69°F21°C | 13 mph21 km/h from Northwest | Drizzle | Mostly Clear |
| May 11 | 50°F10°C | 73°F23°C | 7 mph11 km/h from Northwest | Clear | Mostly Clear |
| May 12 | 50°F10°C | 76°F25°C | 5 mph8 km/h from South | Partly Cloudy | Mostly Cloudy |
| May 13 | 57°F14°C | 76°F25°C | 6 mph9 km/h from South | Mostly Cloudy | Rain |
| May 14 | 61°F16°C | 72°F22°C | 6 mph10 km/h from East | Rain | Drizzle |
Yes
Low of 52°F11°C, High of 63°F17°CWind: 7 mph11 km/h
Precipitation: 91% rain