Today | Weather | Saturday, September 5, 2026

Weather in San Bernardino, California

04:35 PM
Now
Cloudy Weather
95° F
Feels Like 93°
Precipitation 0 %
Wind 10 mph
UV Index (0 - 11+) 2
Humidity 13 %
Today
Cloudy Weather
Day 97°
Night 70°
Precipitation 3 %
Wind 5 mph
UV Index (0 - 11+) 8

Warning: High UV Index Today: 8

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

San Bernardino Weather Forecast Updated

55 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 5, 2025)
Night

Day

99°

Night

64°

Wind

2 mph

Precipitation

0 %

Air Quality in San Bernardino

NOW
44 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 6.9 µg/m³
PM10 11.79 µg/m³
O3 0.047 ppm
NO2 0.3 ppb
SO2 0.4 ppb
CO 0.11 ppm
NH3 0 µg/m³
NO 0.07 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)
PM2.56.9 µg/m³
PM1011.79 µg/m³
O392.4 µg/m³
NO20.49 µg/m³
SO21 µg/m³
CO131.55 µg/m³
NH30 µg/m³
NO0.07 µg/m³