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Weekend Weather Forecast for Diamond Bar-Walnut

The local forecast for Friday, March 28 to Monday, March 31.

Patch file photo.
Patch file photo.
National Weather Service forecast for Diamond Bar-Walnut:
  • Friday: Mostly sunny, with a high near 72. West southwest wind around 10 mph.
  • Friday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 51. West southwest wind 5 to 10 mph becoming light southwest in the evening.
  • Saturday: Patchy fog before 11am. Otherwise, partly sunny, with a high near 73. Light and variable wind becoming west southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
  • Saturday Night: A 30 percent chance of rain after 11pm. Partly cloudy, with a low around 53. West southwest wind 5 to 10 mph becoming light south southwest in the evening.
  • Sunday: A 20 percent chance of showers before 11am. Mostly sunny, with a high near 69. East wind 5 to 15 mph becoming southwest in the morning. Winds could gust as high as 20 mph.
  • Sunday Night: Partly cloudy, with a low around 49.
  • Monday: Partly sunny, with a high near 65.

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