Today | Weather | Wednesday, April 1, 2026

Weather in Sunnyvale, California

07:15 AM
Now
Cloudy Weather
57° F
Feels Like 55°
Precipitation 29 %
Wind 7 mph
UV Index (0 - 11+) 0
Humidity 78 %
Today
Partly Sunny with Showers
Day 66°
Night 50°
Precipitation 49 %
Wind 9 mph
UV Index (0 - 11+) 3

Sunnyvale Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 1, 2025)
Rainy Weather

Day

61°

Night

45°

Wind

12 mph

UV Index

2

Precipitation

96 %

Air Quality in Sunnyvale

NOW
46 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.57 µg/m³
PM10 5.86 µg/m³
O3 0.049 ppm
NO2 0.8 ppb
SO2 0.5 ppb
CO 0.10 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 considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.53.57 µg/m³
PM105.86 µg/m³
O396.79 µg/m³
NO21.45 µg/m³
SO21.24 µg/m³
CO119.75 µg/m³
NH30 µg/m³
NO0 µg/m³