Today | Weather | Sunday, October 12, 2025

Weather in Pasadena, California

08:57 AM

Now

57° F

Feels Like 59°

Precipitation 0 %

Wind 6 mph

UV Index (0 - 11+) 11

Humidity 62 %

Today

Day 81°

Night 55°

Precipitation 0 %

Wind 6 mph

UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Pasadena Weather Forecast Updated

43 minutes ago

Last updated on October 12, 2025 8:13 AM

Weather Forecast History

Last Year's Weather on This Day (October 12, 2024)

Day

82°

Night

55°

Wind

4 mph

Precipitation

Air Quality in Pasadena

NOW

37 AQI

Good air quality Dominant pollutant: PM_2.5

Pollutant Concentrations:

PM_2.5 8.96 µg/m³

PM₁₀ 22.47 µg/m³

O₃ 0.036 ppm

NO₂ 2.3 ppb

SO₂ 0.8 ppb

CO 0.15 ppm

NH₃ 0.11 µg/m³

NO 0.44 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 – 8.96 µg/m³

PM₁₀ – 22.47 µg/m³

O₃ – 70.87 µg/m³

NO₂ – 4.4 µg/m³

SO₂ – 2.22 µg/m³

CO – 167.52 µg/m³

NH₃ – 0.11 µg/m³

NO – 0.44 µg/m³

View Hourly Air Quality Forecast