Today | Weather | Friday, September 26, 2025

Weather in Hayward, California

12:48 AM
Now
Cloudy Night
61° F
Feels Like 61°
Precipitation 0 %
Wind 5 mph
Humidity 84 %
Today
Cloudy Weather
Day 84°
Night 57°
Precipitation 0 %
Wind 10
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.

Hayward Weather Forecast Updated

Weather Forecast History

Last Year's Weather on This Day (September 26, 2024)

Night

Day

81°

Night

54°

Wind

4 mph

Precipitation

0

Air quality in Hayward

NOW
52 AQI
Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 12.79 µg/m³
PM10 19.28 µg/m³
O₃ 25.63 ppb
NO₂ 10.06 ppb
SO₂ 1.29 ppb
CO 188.56 ppb
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.