Excessive Heat — San Diego County Valleys, California

2024-09-04 to 2024-09-09 · San Diego County Valleys, California

Event narrative

High temperatures across inland San Diego county valleys reached 100 to 112F from September 4 to 9, 2024. The hottest days were September 6 and 8, when maximum temperatures reached 103 to 110F along I-15 corridor.

Wider weather episode

A heat wave developed starting Labor Day weekend and peaked the next weekend September 5 to 9, 2024. The hottest days included Ramona reaching 114, Santa Ana 113, and Anaheim an all-time record of 112.

Source: NOAA Storm Events Database, event_id 1219630. Narrative written by the NWS forecast office that issued the report.