the annual average temperature in the chaparral can range from below 0 to about 20 degrees celsius the summers in the chaparral are hot and dry around 40 degrees celsius the winters are relatively mild around 10 degrees celsius in the summer fire and droughts are very common in the chaparralhe annual average temperature in the chaparral can range from below 0 to about 20 degrees celsius the summers in the chaparral are hot and dry around 40 degrees celsius the winters are relatively mild around 10 degrees celsius in the summer fire and droughts are very common in the chaparral