San Diego Sees Afternoon Showers, Highs Near 82°F

Partly sunny skies gave way to scattered afternoon showers across San Diego on Wednesday, September 17, 2025, bringing cooler temperatures and slippery roads after an extended dry stretch.

Residents enjoyed mild morning conditions before tropical moisture moved in from the west, leading to brief but moderate rain bursts. The unexpected rainfall marks one of the few wet events this month, offering a respite from the persistent September heat.

Weather Highlights

  • Morning overcast with temperatures around 67°F and light southerly winds of 6 mph at 9 AM.
  • High reached 82°F by mid-afternoon under partly sunny skies, with humidity rising and a few showers developing after 2 PM.
  • Precipitation probability peaked at 77% during the heaviest showers; total rainfall remained under 0.1 inches.
  • Winds shifted to a steady west-northwest at 7 mph, easing in the evening as skies clouded over.
  • UV index peaked at 11, prompting advisories for sun protection during midday hours.

Impacts and Outlook

  • Road Conditions: Rain-slicked streets prompted several minor fender-benders in downtown neighborhoods; motorists are advised to reduce speed and increase following distance.
  • Air Quality: Despite higher humidity, air quality remained in the moderate range, with no advisories issued for sensitive groups.
  • Tonight’s Forecast: Mostly cloudy with lingering showers and an overnight low near 67°F.

Subheading: Next 24 Hours

  • Continued chance of showers before sunrise, tapering off by dawn.

  • Thursday expected to return to dry, partly cloudy conditions with highs near 81°F.

  • San Diego Meteorological Service