Heat — San Diego County Valleys, California

2023-09-08 to 2023-09-10 · San Diego County Valleys, California

Event narrative

Hot temperatures impacted the San Diego County Valleys September 8-10, 2023. High temperatures reached the upper-90s, with overnight lows falling mainly into the 60s and 70s. The hottest temperatures occurred on September 8:

Ramona: 99/61

Poway: 97/66

Alpine: 96/69

Gillespie Field: 97/70

El Cajon: 97/70.

Wider weather episode

A short-duration heat wave impacted inland locations during the second weekend of September. The Coachella Valley saw readings up to 110-115 degrees on September 9, with lows only falling into the 90s. Elsewhere, the Inland Empire, the San Diego County Valleys and the High Desert saw highs in the upper-90s to low-100s each day.

Source: NOAA Storm Events Database, event_id 1139406. Narrative written by the NWS forecast office that issued the report.