Hot weather will continue in Pasadena through Friday with highs near 93 degrees before a slight weekend cooldown and a chance of showers Sunday, forecasters said.
The National Weather Service in Los Angeles/Oxnard reported Thursday at 3:15 a.m. PDT that a strong ridge of high pressure is keeping inland temperatures above normal. The ridge will weaken over the weekend, allowing monsoonal moisture to move into the region.
Thursday’s forecast calls for sunny skies and a high near 93 degrees. Winds will be calm, becoming south-southwest at 5 mph in the afternoon. Overnight lows will fall to 64 degrees under mostly clear skies.
Friday will remain hot with a high near 93 degrees. Clouds will increase Friday night, with lows around 63 degrees. Saturday will be partly sunny and slightly cooler, with highs near 91 degrees.
Forecasters said monsoonal showers and thunderstorms are possible beginning Sunday late in the evening. Temperatures will hold near 91 degrees Sunday and Monday before climbing again. Highs are expected to reach 95 degrees Tuesday and 97 degrees Wednesday. The National Weather Service said major heat risk levels are possible midweek if offshore winds develop.
Heat advisories remain in effect for inland valleys and foothills, including Pasadena. Officials urged residents to limit outdoor activity during peak heat, stay hydrated, and check on vulnerable individuals.
By Tuesday and Wednesday, skies will clear as monsoonal moisture exits the region. Sunshine and weaker onshore flow will drive temperatures higher, with forecasters warning of extreme heat potential.
Here is the Pasadena forecast from the National Weather Service as of 3:15 a.m. Thursday:
Today: Sunny, with a high near 93. Calm wind becoming south southwest around 5 mph in the afternoon.
Tonight: Mostly clear, with a low around 64. South southwest wind around 5 mph becoming calm in the evening.
Friday: Sunny, with a high near 93. Calm wind becoming south around 5 mph in the afternoon.
Friday Night: Increasing clouds, with a low around 63. South southwest wind around 5 mph becoming calm in the evening.
Saturday: Partly sunny, with a high near 91. Calm wind becoming south southwest around 5 mph in the afternoon.
Saturday Night: Mostly cloudy, with a low around 65.
Sunday: Mostly cloudy, with a high near 91.
Sunday Night: A slight chance of showers after 11:00 p.m. Mostly cloudy, with a low around 65.
Monday: Mostly sunny, with a high near 91.
Monday Night: Mostly clear, with a low around 66.
Tuesday: Mostly sunny, with a high near 95.
Tuesday Night: Mostly clear, with a low around 69.
Wednesday: Mostly sunny and hot, with a high near 97.
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