December weather forecast and climate
Richland, WA

Average temperature in December - Richland, WA
  • Average high temperature in December: 38°F

Warmest months (with the highest average high temperature) are July and August (88°F).
The month with the lowest average high temperature is December (38°F).

  • Average low temperature in December: 28°F

The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is December (28°F).

Average rainfall in December - Richland, WA
  • Average rainfall in December: 1.1"

The wettest month (with the highest rainfall) is December (1.1").
The driest month (with the lowest rainfall) is August (0.2").

Average daylight in December - Richland, WA
  • Average daylight in December: 8.7h

The month with the longest days is June (Average daylight: 15.7h).
The month with shortest days is December (Average daylight: 8.7h).