Humboldt County is an area of moderate temperatures and considerable precipitation. Temperatures along the coast vary only 10 degrees from summer to winter, although a greater range is found over inland areas. Temperatures of 32 degrees or lower are experienced nearly every winter throughout the area, and colder temperatures are common in the interior. Maximum readings for the year often do not exceed 80 on the coast. Meanwhile Redwood Trees experiences 100 degrees or more readings frequently in the mountain valleys.
Rain
In most years, rainfall is
experienced each month of the year, although amounts are negligible from
June through August. Seasonal totals average more than 40 inches in the
driest area, and exceed 100 inches in the zones of heavy precipitation.
Because of the moisture and moderate temperature the average relative
humidity is high.