Part of it’s the definition of “Los Angeles” – for those not familiar with the area, the “Los Angeles Metro Area” is bigger than some US states. In addition, there’s a lot of variety in the geography of the area. “Los Angeles County” has everything from beaches (at sea level, obviously) to mountains that go up over 10,000 feet. Those mountain peaks get snow quite often in the winter, and there are multiple ski resorts up there within an 90 minute or so drive from downtown LA.
But in the actual city limits of “Los Angeles” it’s a bit odd to see actual snow. Most of the city limits are below 3,000 and we only get cold storms that dust those low peaks every few years. But they make for fantastic picture postcard photos.