Today | Weather | Thursday, October 30, 2025

Weather in Sunnyvale, California

11:31 AM

Now

66° F

Feels Like 70°

Precipitation 0 %

Wind 7 mph

UV Index (0 - 11+) 3

Humidity 66 %

Today

Day 72°

Night 52°

Precipitation 0 %

Wind 7 mph

UV Index (0 - 11+) 3

Sunnyvale Weather Forecast Updated

34 minutes ago

Last updated on October 30, 2025 10:57 AM

Weather Forecast History

Last Year's Weather on This Day (October 30, 2024)

Day

68°

Night

52°

Wind

4 mph

Precipitation

Air Quality in Sunnyvale

NOW

40 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 8.36 µg/m³

PM₁₀ 30.49 µg/m³

O₃ 0.043 ppm

NO₂ 0.4 ppb

SO₂ 0.3 ppb

CO 0.09 ppm

NH₃ 0 µg/m³

NO 0.12 µg/m³

PM_2.5 – 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)

PM_2.5 – 8.36 µg/m³

PM₁₀ – 30.49 µg/m³

O₃ – 83.77 µg/m³

NO₂ – 0.79 µg/m³

SO₂ – 0.85 µg/m³

CO – 102.61 µg/m³

NH₃ – 0 µg/m³

NO – 0.12 µg/m³

View Hourly Air Quality Forecast