Chico has a moderate climate that provides the community with a true essence of the four seasons. Fall always provides a beautiful display of turning leaves and winter is cool and wet. The spring bring bursts of breathtaking blossoms and summer is warm and clear.
As a result of its inland location, Chico experiences a considerable range of temperature, due to marine air traveling up the valley from the Carquinez Straits. The average daily temperature remains above freezing even during December through February, the coldest months of the year.
During the summer months, June through September, the maximum temperature is usually at or above 96 degrees. July tends to be the warmest summer month. The average summer temperature is 90 degrees while the average winter temperature is 45 degrees.
The annual precipitation in the Chico area averages 26.29 inches. Most of the rain falls during the coldest months of the year (December through February). Only about 3 percent of the year's total precipitation falls during June, July, August and September.
The prevailing winds in the city are from the southeast or northwest. About 96 percent of the time these gusts are below 15 miles per hour. During a typical year, the Chico area will have 219 clear days, 57 partly cloudy days and 89 cloudy days. The sun shines approximately 50 percent of the time during the winter months and 95 percent during the summer and fall.