Today | Weather | Saturday, October 4, 2025

Weather in Sunnyvale, California

11:25 PM

Now

61° F

Feels Like 61°

Precipitation 0 %

Wind 5 mph

Humidity 81 %

Today

Day 79°

Night 55°

Precipitation 0 %

Wind 5 mph

Sunnyvale Weather Forecast Updated

Last updated on October 04, 2025 10:24 PM

Last Year's Weather on This Day (October 4, 2024)

95°

66°

4 mph

NOW

42 AQI

Good air quality Dominant pollutant: PM2.5

PM2.5 12.87 µg/m³

PM10 20.17 µg/m³

O₃ 19.87 ppb

NO₂ 17.02 ppb

SO₂ 0.90 ppb

CO 214.01 ppb

PM_2.5 – Fine particles <2.5μm

PM₁₀ – Inhalable particles <10μm

O₃ – Ozone

NO₂ – Nitrogen dioxide

SO₂ – Sulfur dioxide

CO – Carbon monoxide

With this level of air quality, you have no limitations. Enjoy the outdoors