Snow almost never falls in the Los Angeles lowlands. Downtown Los Angeles sits near sea level in a basin that the Pacific Ocean keeps mild, so cold winter storms arrive as rain. The San Gabriel Mountains north of the city are different. The same storm that brings cold rain downtown can drop a foot or more of snow on Wrightwood and Big Bear Lake, within a two-hour drive.
Does It Snow in Los Angeles?
Snow almost never accumulates in lowland Los Angeles. Measurable snow at low elevation is extremely rare in the records of the National Weather Service Los Angeles/Oxnard office, and most of the county below about 1,000 feet goes decades between events. What people call snow in the city is usually hail or graupel. Graupel is soft, rimed ice pellets that form in cold winter thunderstorms and briefly whiten lawns and streets before melting.
Graupel forms when supercooled cloud droplets freeze onto a falling ice crystal. On video, graupel looks like light snow, which is why "it's snowing in LA" clips spread almost every winter. Real snow is routine 60 to 90 minutes north and east, in the San Gabriel and San Bernardino Mountains. Elevations above 5,000 to 6,000 feet there get several snowstorms in most winters.
| Location | Approximate elevation | What a cold winter storm typically brings |
|---|---|---|
| Downtown Los Angeles | Near sea level | Cold rain; measurable snow is exceptionally rare |
| Pasadena | A few hundred feet | Cold rain, with snow-capped peaks visible to the north |
| Wrightwood | Around 6,000 feet | Regular winter snow accumulation most seasons |
| Big Bear Lake | Roughly 6,750 feet | Regular winter snow accumulation and lift-served skiing |
Why Does Elevation Decide Whether an LA Storm Falls as Rain or Snow?
Elevation decides whether an LA storm brings rain or snow because the freezing level sets where snow melts. The freezing level is the altitude where air temperature crosses 32°F.
Forecasters also use the wet-bulb temperature, which accounts for cooling as snow falls through dry air. The Pacific Ocean keeps the Los Angeles Basin mild, so the freezing level is usually high and snow melts into rain long before reaching sea level. In a cold winter storm, the freezing level drops to 3,000 to 5,000 feet, enough to whiten the San Gabriel peaks while downtown gets cold rain from the same storm.
One storm can therefore bring two different days an hour apart. A driver leaving downtown in rain on the Angeles Crest Highway can reach falling snow near Wrightwood by climbing several thousand feet through the freezing level. The ocean's warming effect is strongest at the coast and weakens inland and with elevation. Southern California's snow line and rain line are the same line, seen from opposite sides.
When Could Snow Reach the Los Angeles Lowlands?
Snow reaches the Los Angeles lowlands only when three conditions arrive together. The first is an unusually cold upper-level low pressure system.
The second is an NWS Los Angeles/Oxnard snow level forecast near sea level. The third is enough moisture in that cold air to produce precipitation. Most winters bring cold, dry troughs that lower the snow level with little moisture, and wetter, milder storms that never get cold enough at low elevation.
Even with cold air and moisture together, lowland snow may not stick, because ground warmth and surface temperatures also matter. A forecast snow level dropping toward sea level is a signal to watch, not a promise of snow in the city. Treat any lowland snow chance as a low-probability event worth monitoring.
What Does Los Angeles Snow History Actually Show?
The January 1949 storm is the best-known Los Angeles snow event. Snow fell across much of the Los Angeles Basin and was documented at low elevations around the region, one of the few times in the 20th century that lowland Southern California saw widespread snow. Scattered reports from the early 1960s and graupel or hail events retold as snow have grown the legend of LA snow beyond the verified record. The same January 1949 cold wave tied Downtown's record low of 28°F; see the coldest temperature ever recorded in LA.
National Weather Service and NOAA station records are the authoritative source for any specific date and location of lowland snow. Mountain snow is well documented: the San Gabriel and San Bernardino high country gets measurable snow in nearly every winter, often from several separate storms. The mountains are the reliable part of the region's snow story.
Where Can You Find Reliable Snow Near Los Angeles?
Reliable snow near Los Angeles is in the San Gabriel and San Bernardino Mountains. Big Bear Lake, at about 6,750 feet, and Wrightwood, at about 6,000 feet, are the two most accessible mountain towns from the LA Basin. Both get regular winter snow and lift-served skiing in a typical season. Big Bear averages about 59 inches of snow a year, as Big Bear Lake weather by month shows.
Foothill cities such as Pasadena, at the base of the San Gabriels and only a few hundred feet up, almost never get snow. Pasadena does offer close views of snow-capped peaks after a cold storm, especially looking north near the mountain front. Check each mountain destination's own page for its elevation and snow season, because a few thousand feet of elevation changes the season a lot. For the whole region, including desert and coastal ranges, see where does it snow in Southern California; for Pasadena and the foothills, see does it snow in Pasadena.
How Should You Check an Incoming Snow Chance?
To check an incoming snow chance, start with the point forecast and snow level from the NWS Los Angeles/Oxnard office for the LA Basin and San Gabriels. For areas farther south and east, use the NWS San Diego office. The snow level is the elevation above which precipitation falls as snow. It updates with each forecast and can shift by a thousand feet or more as a storm develops, so check it again the morning of a trip.
Before driving into the mountains during or after a storm, check Caltrans QuickMap for chain controls and road status on State Route 2 and State Route 18. Chain controls start with little notice, and mountain roads close during the heaviest snow. The NWS winter weather safety guidance covers driving in snow and cold. For other destinations, see does it snow in Palm Springs and does it snow in Big Bear Lake.
Los Angeles gets rain even in its coldest storms. The snow in Southern California's postcard image of palm trees below white peaks falls a few thousand feet higher. Before planning a snow trip to Big Bear Lake or anywhere else, check the temperature and snow level on WeatherLA's Los Angeles forecast pages and confirm road conditions before driving up.