The Monterey Peninsula enjoys a mild weather pattern. In summer, fog is prevalent; in spring and fall, clear days are the norm.
Unlike most places in the country, the warmest months are May and September - temperatures during these two months can get into the 70s or 80s during the day, and lows tend to be in the mid 50s. October is almost as nice, reaching highs in the 60s or 70s and occasionally into the 80s.
The coldest months are December and January. Winter highs can be anywhere from the 50s to the 70s and lows are usually in the low to mid 40s. On rare occasions, usually in late December or January, lows can get below freezing.
Summer temperatures are fairly consistent, with highs ranging from about 65-75, and lows almost always around 55.
Spring and Fall can be fickle. The days could be sunny and warm or stormy and blustery. It's not unheard of to experience both extremes within a two day period. Springtime also has a tendency to be quite breezy, so a light jacket is recommended.
The prevailing winds are from the west. But every now and then the winds will come from the east, a situation known as "offshore flow," creating unusually warm and dry conditions that usually last a few days.
Average annual rainfall, occurring primarily between November and April, is 19.67 inches.
Click here for a list of monthly temperatures & precipitation averages in Monterey.