A sharp cool-down is expected in Pasadena beginning Thursday as a deep marine layer spreads across Southern California, forecasters said Tuesday. Temperatures will drop nearly 10 degrees from earlier in the week, with highs falling into the upper 70s by Thursday and Friday, according to the National Weather Service in Los Angeles/Oxnard.
Today’s high will reach near 87 degrees under sunny skies, with calm winds shifting to a light south-southwest breeze at 5 mph in the afternoon. Tonight will be partly cloudy with a low around 59 degrees.
Wednesday will bring partly sunny skies before clearing, with a high near 83 degrees. Overnight lows will dip to 57 degrees as clouds increase. By Thursday, patchy morning fog will linger before skies turn mostly sunny, but highs will only reach 79 degrees. Winds will remain light.
Forecasters said the cooling trend will continue into Friday, with highs near 78 degrees under mostly sunny skies. Saturday will be similar, with highs near 77 degrees. Overnight lows through the weekend will stay in the mid-50s.
No rain is forecast for Pasadena during this period, though fog and low clouds will be common in the mornings. Winds will stay light.
The weekend outlook calls for sunny afternoons after morning fog, with highs in the upper 70s. By Monday, temperatures will begin to rebound, reaching the low 80s. Forecasters said a stronger warming trend is likely next week as a high-pressure system builds.
Residents should expect cooler mornings and reduced visibility from fog during commutes later this week. No advisories are currently in effect for Pasadena.
Here is the Pasadena forecast from the National Weather Service as of 2:54 a.m. Tuesday:
Today: Sunny, with a high near 87. Calm wind becoming south southwest around 5 mph in the afternoon.
Tonight: Partly cloudy, with a low around 59. Southwest wind around 5 mph becoming calm in the evening.
Wednesday: Partly sunny, then gradually becoming sunny, with a high near 83. Calm wind becoming south southwest around 5 mph in the morning.
Wednesday Night: Increasing clouds, with a low around 57. South southwest wind around 5 mph becoming calm in the evening.
Thursday: Patchy fog before 11:00 a.m. Otherwise, mostly sunny, with a high near 79. Calm wind becoming south southwest around 5 mph in the afternoon.
Thursday Night: Patchy fog after 11:00 p.m. Otherwise, mostly cloudy, with a low around 55.
Juneteenth: Patchy fog before 11:00 a.m. Otherwise, mostly sunny, with a high near 78.
Friday Night: Mostly clear, with a low around 55.
Saturday: Sunny, with a high near 77.
Saturday Night: Mostly clear, with a low around 55.
Sunday: Sunny, with a high near 78.
Sunday Night: Mostly clear, with a low around 56.
Monday: Sunny, with a high near 82.
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