Pat's Forecast: Fair Weather turning Hot

SAN DIEGO - Wednesday is the start of October, one of the warmest months in San Diego and the mercury is going to continue to climb into the weekend!  

Temperatures will remain near average Wednesday then... we turn hot and dry for the second half of the work week and right through the weekend.  For that reason, a Heat Advisory goes into effect at 11am Friday for the Mountains and all areas west. The coast will be close to 90° while inland valleys will break the 100 degree mark.

A shallower marine layer may cause patchy morning fog Thursday before it gets very warm.  But first, here are the comfortable numbers for your Wednesday...


  • COAST: 72-81
  • INLAND: 78-87
  • MOUNTAINS: 77-86
  • DESERTS: 92-97

Highs Thursday will quickly jump nearly 10 degrees from Wednesday.  By Friday and Saturday our warmest spots inland will be at or over 100 while the coast will be near 90. Looking for the silver lining, at least this heat wave will not have that oppressive humidity we had to endure last go round.  Of course there's a flip side to that...

Gusty northeast winds will peak Wednesday night into Thursday morning with lowest humidity levels Friday and Saturday elevating the risk of fire danger. Gusts could reach 20 to 40 mph but are not expected to be long-lived, but rather localized while lowest humidity levels will be 5 to 15 percent. Winds will decrease late Thursday through Saturday.

This event is on the weak-to-moderate end of Santa Ana events and the latest forecast tool, the Santa Ana Wildfire Threat Index forecasts Thursday as 'Marginal' which means if a fire ignites it may grow rapidly.

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10News Chief Meteorologist Pat Brown

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