Pennsylvania, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and Climate
Downingtown, PA

  • The average high temperature in December: 15°C

The warmest month (with the highest average high temperature) is July (33°C).
The month with the lowest average high temperature is January (11°C).

  • The average low temperature in December: -4°C

The month with the highest average low temperature is June (20°C).
The coldest month (with the lowest average low temperature) is December (-4°C).

  • The average rainfall in December: 97mm

Wettest months (with the highest rainfall) are June and August (114mm).
Driest months (with the lowest rainfall) are February, October and November (84mm).