No. Although winter rains can inspire some residents to pursue tropical getaways, these weather systems also prevent the extreme cold experienced by many other areas of the country. Overall, Clark County enjoys a mild climate, thanks to its proximity to the Pacific Ocean to the west and the Cascade Range to the east. The seasons are well-defined, but transition into one another gradually.
The average annual temperature in the county is approximately 50 degrees Fahrenheit. Average low-elevation temperatures range from mid-to upper 30s in January and mid- to upper 60s in July. Summer temperatures can top 90 or 100 degrees, with warm weather lasting into October.
The average growing season on the county's western plains ranges from 154 days at Battle Ground to 178 days at La Center and 222 days at Vancouver.
Seventy percent of the county's precipitation falls between November and March. Rainfall amounts vary quite a bit, ranging from about 38 inches in Vancouver to almost 80 inches in Yacolt. Mountainous areas in northeast Clark County can get more than 120 inches of rain annually. Average annual snowfall ranges from about 7 inches in Vancouver to several feet in the mountains, although snow does not fall every year.
Prevailing winds over most of the county are northwesterly during summer and southeasterly during winter.