Today | Weather | Tuesday, April 21, 2026

Weather in Daly City, California

03:19 PM
Now
Stormy Weather
59° F
Feels Like 54°
Precipitation 45 %
Wind 16 mph
UV Index (0 - 11+) 2
Humidity 75 %
Today
Sunny with a Chance of Thunderstorms
Day 61°
Night 52°
Precipitation 88 %
Wind 12 mph
UV Index (0 - 11+) 3

Daly City Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 21, 2025)
Cloudy Weather

Day

66°

Night

52°

Wind

8 mph

UV Index

9

Precipitation

1 %

Air Quality in Daly City

NOW
49 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.5 µg/m³
PM10 0.97 µg/m³
O3 0.053 ppm
NO2 0.1 ppb
SO2 0.1 ppb
CO 0.13 ppm
NH3 0 µg/m³
NO 0.03 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.50.5 µg/m³
PM100.97 µg/m³
O3104.16 µg/m³
NO20.19 µg/m³
SO20.26 µg/m³
CO143.27 µg/m³
NH30 µg/m³
NO0.03 µg/m³