Diamond Bar, California — live current conditions, hourly and 7-day forecasts, NWS alerts, aviation weather, radar and satellite imagery, tides and marine conditions for Diamond Bar, Los Angeles County.
Tides, marine forecast and fishing conditions near Diamond Bar. Nearest NOAA tide station:
Flight conditions near Diamond Bar — sourced from the FAA Aviation Weather Center. Nearest reporting station: locating…
Live animated radar for Diamond Bar and surroundings — RainViewer.
NOAA GOES-16 GEOCOLOR — live animated loop updated every 10 minutes. Shows cloud cover, storm systems and weather patterns across the continental US.
Source: NOAA/NESDIS GOES-East · Public domain · Auto-updates on page reload
Diamond Bar rises from the rolling foothills where the San Gabriel Mountains begin to soften their grip on the urban sprawl, a landscape sculpted by ancient watercourses and the persistent California sun. It lies 3.2 miles east of Walnut, CA (from Walnut, CA: bearing 80°T), and is situated 9.4 miles west-south-west of Ontario. The terrain here is a tapestry of chaparral-covered slopes and broad, sun-drenched valleys, where the air often carries the dry, herbal scent of sage and the distant hum of traffic. Houses climb the hillsides like tenacious blossoms, their rooftops catching the light as it shifts from the sharp, bright clarity of midday to the molten gold of evening. The very contours of Diamond Bar suggest a place of transition, where the raw beauty of the undeveloped land meets the organized lines of human habitation, a constant, gentle dialogue between wildness and order. Historically, this region was shaped by agricultural endeavors, with citrus groves and vineyards once gracing these fertile soils, a legacy still whispered in the names of streets and the occasional mature fruit tree stubbornly clinging to life. The development of Diamond Bar, like much of Southern California, accelerated in the post-war era, transforming open country into a thriving suburban center. Today, its economy is a vibrant mix, drawing strength from its strategic position within the greater Los Angeles metropolitan area, serving as a hub for commerce and innovation. The presence of educational institutions fosters a sense of forward momentum, and the community, while embracing modern conveniences, retains a distinct character, a quiet pride in its unique geographical embrace between rugged nature and the pulse of a vast metropolis.
| Location | Diamond Bar, Los Angeles County, California |
| Coordinates | 34.028623°N, 117.810337°W |
| Timezone | Pacific Time (America/Los_Angeles) |
| ZIP Code(s) | 91765, 91789 |
| Area Code | 818, 747 |
| Page generated | June 2026 |
| Weather data | Open-Meteo (open-source), NOAA National Weather Service |