Today | Weather | Friday, October 30, 2026

Weather in Lake Forest, California

03:23 AM
Now
Rainy Weather
63° F
Feels Like 61°
Precipitation 44 %
Wind 4 mph
Humidity 84 %
Today
Rainy Weather
Day 72°
Night 59°
Precipitation 55 %
Wind 6 mph
UV Index (0 - 11+) 1

Lake Forest Weather Forecast Updated

6 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 30, 2025)
Cloudy Night

Day

88°

Night

54°

Wind

5 mph

Precipitation

0 %

Air Quality in Lake Forest

NOW
48 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.32 µg/m³
PM10 8.3 µg/m³
O3 0.052 ppm
NO2 0.1 ppb
SO2 0.1 ppb
CO 0.11 ppm
NH3 0 µg/m³
NO 0 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)
PM2.5 – 3.32 µg/m³
PM10 – 8.3 µg/m³
O3 – 102.7 µg/m³
NO2 – 0.24 µg/m³
SO2 – 0.28 µg/m³
CO – 131.48 µg/m³
NH3 – 0 µg/m³
NO – 0 µg/m³