Today | Weather | Monday, April 27, 2026

Weather in San Bernardino, California

03:34 PM
Now
Cloudy Weather
66° F
Feels Like 70°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 4
Humidity 33 %
Today
Cloudy Weather
Day 66°
Night 48°
Precipitation 25 %
Wind 6 mph
UV Index (0 - 11+) 7

San Bernardino Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 27, 2025)
Partly Sunny with Showers

Day

61°

Night

50°

Wind

4 mph

UV Index

4

Precipitation

60 %

Air Quality in San Bernardino

NOW
85 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.64 µg/m³
PM10 3.09 µg/m³
O3 0.065 ppm
NO2 0.2 ppb
SO2 0.2 ppb
CO 0.11 ppm
NH3 0.01 µg/m³
NO 0.05 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.51.64 µg/m³
PM103.09 µg/m³
O3127.81 µg/m³
NO20.35 µg/m³
SO20.6 µg/m³
CO129.44 µg/m³
NH30.01 µg/m³
NO0.05 µg/m³