Columbia County, Washington Weather by Month

By | November 30, 2023

Columbia County, located in southeastern Washington, experiences a semi-arid climate with distinct seasons.

January – March (Winter):

  • Winters in Columbia County are cold, with January typically being the coldest month.
  • Daytime temperatures often range from the 20s to 40s Fahrenheit, and nighttime temperatures can drop below freezing.┬áSee for climate and weather in Tacoma, Washington.
  • Snow is common during these months, and winter storms may bring varying amounts of snowfall.
  • Residents may experience cold and brisk conditions, and winter activities like skiing and snowmobiling are popular.

April – June (Spring):

  • Spring brings a gradual warming of temperatures, and the landscape begins to awaken.
  • Daytime highs generally range from the 50s in April to the 70s and 80s in May and June.
  • Spring is a transition period, and while cooler days are possible in April, the weather becomes more comfortable, and outdoor activities increase.
  • The region experiences the blooming of flowers and the greening of vegetation.

July – September (Summer):

  • Summer in Columbia County is warm, with daytime temperatures often reaching into the 80s and 90s Fahrenheit.
  • July and August are typically the warmest months, with occasional days surpassing 100 degrees Fahrenheit.
  • Summer is the driest season, with low humidity levels and clear skies.
  • Residents and visitors take advantage of the warm weather with outdoor activities, including farming, hiking, and visits to local parks.

October – December (Fall):

  • Fall is characterized by a gradual cooling of temperatures and the changing colors of the leaves.
  • Daytime highs range from the 70s in October to the 30s and 40s in December.
  • The fall foliage attracts tourists and locals alike.
  • Fall may bring occasional rain showers, and the region experiences milder and more comfortable temperatures compared to the peak of summer.
  • Harvest season for crops like wheat and barley occurs in the fall.

Additional Considerations:

  • Columbia County’s climate is influenced by its location in southeastern Washington and its proximity to the Blue Mountains.
  • The county is known for its agricultural activities, with a focus on wheat, barley, and other crops.
  • The Snake River runs along the southern border of the county, impacting local weather conditions.
  • Columbia County occasionally experiences extreme weather events, including heatwaves and occasional winter storms. Residents should stay informed about weather conditions, especially during the summer months.
  • The county’s landscape is characterized by rolling hills, farmland, and the presence of the Palouse River.

For the most accurate and up-to-date weather information, it’s recommended to consult local weather forecasts, meteorological sources, or the National Weather Service. Local climate conditions can vary, and microclimates may exist within the county, especially given its diverse topography.

Columbia County, Washington