Above-average Heat Grips San Diego County

Temperatures to remain well above seasonal norms through Friday

Mar. 24, 2026 at 4:36am

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A high-pressure system will keep temperatures in San Diego County well above average this week, with the hottest conditions expected inland. Daytime highs are forecast to reach up to 20 degrees above normal, making this March one of the hottest on record for the region.

Why it matters

The prolonged heat wave could strain energy grids, increase wildfire risk, and pose health risks for vulnerable populations. It also highlights the growing impacts of climate change on local weather patterns.

The details

According to the National Weather Service, highs are expected to reach 71-76°F near the coast, 78-82°F inland, 80-85°F in the western valleys, 84-89°F near the foothills, 80-87°F in the mountains, and 94-97°F in the deserts. Overnight marine layer clouds and fog may provide some moderation near the coast, but temperatures will still be well above average.

  • Temperatures will remain elevated from Tuesday, March 24 through Friday, March 27.
  • This March is on pace to be the hottest on record in San Diego County.

The players

National Weather Service

The federal agency responsible for weather forecasting and issuing weather-related warnings.

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What they’re saying

“Forget the March monthly records...these locations saw temperatures in the past few days that met or exceeded APRIL monthly record highs!”

— NWS San Diego

What’s next

A gradual cooling trend is expected next weekend as the high-pressure system weakens, but temperatures will still remain 10-15 degrees above average.

The takeaway

This prolonged heat wave underscores the growing impacts of climate change on local weather patterns and the need for communities to prepare for more extreme temperatures in the future.