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City of Diamond Bar, CADiamond Bar, CA 7-Day Night Weather Forecast
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Diamond Bar, CA Weather Forecast
Diamond Bar, CA Weather Forecast Date: 849 AM PDT Fri Sep 18 2026
The area/counties/county of: Los Angeles County San Gabriel Valley, including: East Los Angeles, El Monte, Pasadena, Pomona, and San Gabriel.or toggle through each period.
Today... Partly cloudy in the morning then sunny. Highs in the upper 70s to mid 80s.
Tonight... Mostly clear. Lows around 60.
Saturday... Partly cloudy in the morning then sunny. Highs in the 80s to around 90.
Saturday Night... Mostly clear in the evening then mostly cloudy. Lows in the upper 50s to mid 60s.
Sunday... Mostly cloudy. Highs in the lower to mid 80s.
Sunday Night... Partly cloudy. Lows around 60.
Monday... Mostly cloudy in the morning then sunny. Highs around 80.
Monday Night... Mostly clear. Lows in the upper 50s to mid 60s.
Tuesday... Partly cloudy in the morning then sunny. Highs in the lower to mid 80s.
Tuesday Night... Mostly clear. Lows in the lower to mid 60s.
Wednesday... Sunny. Highs in the mid 80s to lower 90s.
Wednesday Night... Mostly clear. Lows in the mid 60s.
POP = Probability of Precipitation
Diamond Bar Radar Loop
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