Today | Weather | Friday, October 9, 2026

Weather in Santa Clara, California

04:42 AM
Now
Foggy Weather
61° F
Feels Like 61°
Precipitation 0 %
Wind 2 mph
Humidity 80 %
Today
Cloudy Weather
Day 81°
Night 59°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 4

Santa Clara Weather Forecast Updated

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

Day

73°

Night

57°

Wind

6 mph

Precipitation

25 %

Air Quality in Santa Clara

NOW
52 AQI
Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 12.79 µg/m³
PM10 31.01 µg/m³
O3 0.041 ppm
NO2 0.7 ppb
SO2 0.4 ppb
CO 0.12 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 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)
PM2.5 – 12.79 µg/m³
PM10 – 31.01 µg/m³
O3 – 79.77 µg/m³
NO2 – 1.24 µg/m³
SO2 – 1.07 µg/m³
CO – 134.25 µg/m³
NH3 – 0 µg/m³
NO – 0 µg/m³