Today | Weather | Wednesday, September 9, 2026

Weather in Hesperia, California

05:33 PM
Now
Cloudy Weather
93° F
Feels Like 91°
Precipitation 7 %
Wind 6 mph
UV Index (0 - 11+) 1
Humidity 25 %
Today
Cloudy Weather
Day 97°
Night 73°
Precipitation 25 %
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.

Hesperia Weather Forecast Updated

46 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 9, 2025)
Cloudy Night

Day

82°

Night

57°

Wind

10 mph

Precipitation

0 %

Air Quality in Hesperia

NOW
128 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 19.62 µg/m³
PM10 27.03 µg/m³
O3 0.078 ppm
NO2 5.6 ppb
SO2 1.3 ppb
CO 0.19 ppm
NH3 0.42 µg/m³
NO 0.56 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:

Members of sensitive groups may experience health effects. The general public is not likely to be affected.

Show raw pollutant concentrations (µg/m³)
PM2.519.62 µg/m³
PM1027.03 µg/m³
O3153.9 µg/m³
NO210.51 µg/m³
SO23.33 µg/m³
CO220.15 µg/m³
NH30.42 µg/m³
NO0.56 µg/m³