Diamond Bar-Walnut Weekend Weather Forecast

The local forecast for Friday, May 9 through Monday, May 12.

Patch file photo.
Patch file photo.
The National Weather Service forecast for Diamond Bar-Walnut

  • Friday: Sunny, with a high near 74. Light and variable wind becoming west 5 to 10 mph in the afternoon.
  • Friday Night: Increasing clouds, with a low around 56. West wind 5 to 10 mph becoming light and variable.
  • Saturday: Cloudy through mid morning, then gradual clearing, with a high near 72. South wind 5 to 10 mph becoming west in the afternoon.
  • Saturday Night: Increasing clouds, with a low around 54. Southwest wind 5 to 10 mph.
  • Sunday: Mostly sunny, with a high near 81. Calm wind becoming west around 5 mph in the afternoon.
  • Sunday Night: Mostly clear, with a low around 54.
  • Monday: Sunny, with a high near 90.


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