Today | Weather | Friday, September 5, 2025

Weather in Hayward, California

03:29 PM
Now
Cloudy Weather
70° F
Feels Like 72°
Precipitation 0 %
Wind 13 mph
UV Index (0 - 11+) 11
Humidity 63 %
Today
Cloudy Weather
Day 72°
Night 61°
Precipitation 1 %
Wind 16
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.

Other:

Cool with clouds yielding to sunshine.

Hayward Weather Forecast Updated

Last updated on

Weather Forecast History

Last Year's Weather on This Day (September 5, 2024)

Cloudy Weather

Day

91°

Night

59°

Wind

8 mph

UV Index

7

Precipitation

0

Air quality in Hayward

NOW
32 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 14.04 µg/m³
PM10 17.85 µg/m³
O₃ 33.06 ppb
NO₂ 5.42 ppb
SO₂ 0.62 ppb
CO 171.49 ppb
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide

Health Recommendations:

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