weather in ferndale, washington fahrenheit
Ferndale, CA Weather Ferndale, CA climate is mild during summer when temperatures tend to be in the 60's and cold during winter when temperatures tend to be in the 40's. The warmest month of the year is September with an average maximum temperature of 71.80 degrees Fahrenheit, while the coldest month of the year is December with an average minimum temperature of 39.10 degrees Fahrenheit.