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San Diego Braces for Humid Warm-Up and Thunderstorm Chances Mid-Week

Published on: 17 September 2025

San Diego Braces for Humid Warm-Up and Thunderstorm Chances Mid-Week

San Diego Weather: Get Ready for a Humid Warm Up!

San Diego is in for a weather shift this week! After a pleasant start, expect hotter and more humid conditions by the middle of the week, with increasing chances of monsoonal moisture and thunderstorms.

Weekly Weather Outlook

The marine layer started deeper this morning, but will thin out as the forecast changes. Expect steadily rising temperatures across the county in the coming days.

Daily Breakdown

Monday will bring highs near the upper 70s along the coast, while inland areas climb towards the upper 80s. The mountains will see highs in the mid-80s, and the deserts will approach triple digits. Tuesday brings a slight chance of showers for the mountains and deserts.

Mid-Week Storm Potential

Thursday and Friday offer the greatest chance of showers, potentially even reaching areas west of the mountains. The rain chances will linger into Saturday, but showers are expected to be more scattered.

Detailed High Temperatures for Monday:

Region High Temperature
Coast 73-78°
Inland 88-93°
Mountains 82-90°
Deserts 97-101°

Stay Updated with Ava Kershner

Follow ABC 10News Weather Anchor Ava Kershner on Instagram, Facebook, and X for the latest updates and insights on San Diego's weather.

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