Monday, April 20, 2026, downtown Los Angeles woke to cool marine-layer air with temperatures in the mid 50s. Skies should clear into a sunny afternoon with a high near 74°F, but a Pacific low moving through will bring showers Monday night into Tuesday, so if you have outdoor plans, an umbrella is your new best friend.
Rain Timing And Amounts
Rain is most likely after 11 a.m. on Tuesday, April 21, 2026, with the heaviest bands arriving between Monday night and Tuesday. According to the National Weather Service, downtown and the basin should see mostly light showers, with new totals generally a few tenths of an inch or less, while the Central Coast could pick up 0.5 to 1.5 inches. Widespread flooding is not expected, although urban low spots and foothill drainages may see brief ponding.
Wind And Boating
Southwest breezes will increase through Tuesday, with basin gusts up to about 20 mph and stronger gusts over the hills and mountains. Boaters should monitor forecasts, as the National Weather Service notes a chance of Small Craft Advisories and even gale-force gusts over the southern waters Wednesday night. Winds will shift to the west-northwest on Wednesday, bringing in drier air and a return to the low 70s.
Commute And Tips
Expect slick roads during the Tuesday midday commute as light showers move through. Visibility may drop and travel times could increase. The Los Angeles Times notes that the system could make Tuesday afternoon traffic slippery, so give yourself extra time, ease off the gas on wet pavement, and secure any loose outdoor items.
What Comes Next
Wednesday should be dry with highs rebounding to the low 70s, offering a brief midweek window for outdoor plans. Forecast models hint at another weak low over the weekend, so keep an eye on updates before you lock in any big Saturday or Sunday events.
