Weather in Diamond Bar, California
Live weather conditions. Source: Open-Meteo
Updated May 24, 2026 · 04:20 PM ET · Refreshes every hour
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About Weather in Diamond Bar
Diamond Bar is located in California (coordinates: 34.001573°N, 117.817601°W). Weather data is sourced from Open-Meteo, a free and open meteorological API using data from national weather services including NOAA.
All temperatures are displayed in Fahrenheit. Wind speed is in miles per hour.