Vista, CA Weather

Climate is temperate, with extremes of temperature uncommon. Coastal breezes and foggy overcast (especially in May and June) keep the late spring/early summer high temperatures below 80 °F (27 °C). on most days. The cool, overcast conditions are often called “May Gray” and “June Gloom” by Vistans. In general, the western side of the city (closer to the Pacific) is cooler and more overcast with ocean fog than the eastern side. It is common in May–June for the western side of Vista to be overcast and cool, while the eastern side basks in clear skies and sunshine. July, August and September are usually warmer, as the coastal breezes lessen. High temperatures in excess of 90 °F (32 °C). (rarely above 100 °F (38 °C)) sometimes occur in late summer. High temperatures also accompany dry Santa Ana wind events, which can strike any month, but are most common during fall. On 90% of days, though, the moderating influence of the nearby Pacific keeps the weather pleasant and temperatures moderate. Frost is quite rare in winter, and snowfall almost unknown. Most of the annual rainfall of 13.24 inches (336 mm) falls between November and April (Mediterranean climate type). Rainfall is higher in the San Marcos Hills on the eastern edge of the city, up to 20 inches (510 mm) per year. The moderate climate has made Vista and surrounding areas a center of the plant nursery industry. Avocados and other subtropical plants thrive in the area.