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June weather outlook: 'Gloom' ahead?

VANDENBERG AIR FORCE BASE, Calif. --  Brad Barclay, a Vandenberg weather/upper air observer contractor, launches a weather balloon to get the upcoming weather information on a thunder storm in the forecast here Sept. 29. (U.S. Air Force Photo/ Airman 1st Class Andrew Lee)

VANDENBERG AIR FORCE BASE, Calif. -- Brad Barclay, a Vandenberg weather/upper air observer contractor, launches a weather balloon to get the upcoming weather information on a thunder storm in the forecast here Sept. 29. (U.S. Air Force Photo/ Airman 1st Class Andrew Lee)

VANDENBERG AIR FORCE BASE, Calif. -- June is the start of the cool season along the Central Coast.

High pressure intensifies west of the state bringing a persistent northwesterly wind flow across the region, which results in an increased marine layer presence across Vandenberg. The continuous onshore flow tends to hinder dissipation of the marine layer, resulting in cooler daytime high temperatures as compared to the rest of the nation during this time of year.

Average high temperature: 64
Average low temperature: 53
Extreme maximum temperature: 107
Extreme minimum temperature: 42
Average precipitation: 0.10 inches
Maximum precipitation: 1.10 inches
Average snowfall: 0 inches
Maximum snowfall: 0 inches
Average wind speed and direction: 330 degrees at 7 mph
Maximum wind speed: 42.5 mph
Expected days with thunderstorms: 1
Expected days with fog (visibility less than seven miles): 13

Did you know the term associated with June at Vandenberg is "June Gloom"? This is because of the overcast skies and mild temperatures associated with the marine layer. The condition is prevalent throughout many parts of the world where marine stratus or stratocumulus clouds are common off the western coasts of continents - especially off Peru, Namibia, Western Australia and California. Such phenomenon is persistent year-round off the coast, yet in certain seasons they blow ashore and create the "June Gloom" effect on land.

Early mornings during this period are typically foggy, with occasional drizzle. The fog turns to low clouds by late morning to early afternoon and finally, by late afternoon, solar heating is sufficient to evaporate the clouds. Often the overcast conditions will dissipate ("burn off") quickly inland, but will linger along the immediate coast.