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Pasadena Braces for Rapid Temperature Swing
Forecasters warn of 90-degree heat by Thursday after early-week cooldown
Published on Mar. 9, 2026
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Pasadena will experience a sharp temperature swing this week, with a cool-down on Monday and Tuesday followed by a rapid surge into the 90s by Thursday and Friday, according to the National Weather Service. Highs will drop into the lower 70s on Tuesday before rebounding to the lower 80s on Wednesday and then reaching near 91 degrees on Thursday and Friday.
Why it matters
This dramatic temperature fluctuation is highly unusual for early March in Pasadena and could pose risks for residents, especially the elderly and those with health conditions, who may struggle to adapt to the rapid heat wave. The National Weather Service has cautioned that Thursday and Friday's highs could approach heat advisory levels, requiring residents to take precautions.
The details
The National Weather Service in Los Angeles/Oxnard reported that highs will fall into the lower 70s on Tuesday under a deep marine layer before rebounding quickly. By Wednesday, highs will reach the lower 80s, with Thursday and Friday expected to top out near 91 degrees - 15 to 25 degrees above normal for early March. Forecasters said the weekend will remain hot, with highs in the upper 80s, though slightly cooling each day.
- Today's high in Pasadena is forecast at 73 degrees.
- Tuesday will be the coolest day of the week, with highs near 71 degrees.
- By Wednesday, highs will reach the lower 80s.
- Thursday and Friday will bring the hottest conditions, with highs near 91 degrees.
- The weekend will remain hot, with highs in the upper 80s.
The players
National Weather Service
The National Weather Service in Los Angeles/Oxnard is the government agency that issued the forecast for the rapid temperature swing in Pasadena.
What’s next
The National Weather Service will continue to monitor the situation and issue updates as needed. Residents should stay tuned to local weather reports and take appropriate precautions as the heat wave approaches.
The takeaway
This rapid temperature swing in Pasadena is a stark reminder of the increasing unpredictability and intensity of weather patterns due to climate change. As extreme heat events become more common, communities must be prepared to protect vulnerable populations and adapt to these challenging conditions.
