Today | Weather | Sunday, April 26, 2026

Weather in Sunnyvale, California

07:14 AM
Now
Cloudy Weather
54° F
Feels Like 52°
Precipitation 37 %
Wind 5 mph
UV Index (0 - 11+) 0
Humidity 86 %
Today
Cloudy Weather
Day 64°
Night 48°
Precipitation 80 %
Wind 9 mph
UV Index (0 - 11+) 5

Sunnyvale Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 26, 2025)
Stormy Weather

Day

64°

Night

52°

Wind

8 mph

UV Index

9

Precipitation

65 %

Air Quality in Sunnyvale

NOW
69 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4.2 µg/m³
PM10 11.13 µg/m³
O3 0.060 ppm
NO2 0.2 ppb
SO2 0.3 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)
PM2.54.2 µg/m³
PM1011.13 µg/m³
O3117.8 µg/m³
NO20.4 µg/m³
SO20.79 µg/m³
CO140.32 µg/m³
NH30 µg/m³
NO0 µg/m³