Today | Weather | Thursday, August 21, 2025
Extreme Heat Warning (Issued when dangerously high temperatures are expected.)

Weather in Pomona, California

05:17 PM
Now
Cloudy WeatherCloudy weather, overcast skies with clouds.
102° F
Feels Like 100°
Precipitation 0 %
Wind 12 mph
UV Index (0 - 11+) 11
Humidity 23 %
Today
Cloudy WeatherCloudy weather, overcast skies with clouds.
Day 104°
Night 72°
Precipitation 0 %
Wind 7 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.

Other:

Sunny to partly overcast and hot; caution advised if outside for extended periods of time.

Pomona Weather Forecast Updated

26 minutes ago
Last updated on

Weather Forecast History

Last Year's Weather on This Day (August 21, 2024)

Sunny WeatherSunny weather, clear skies and sunny weather.

Day

97°

Night

66°

Wind

7 mph

UV Index

10

Precipitation

0

Air quality in Pomona

NOW
122 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 18.84 µg/m³
PM10 20.01 µg/m³
O₃ 90.53 ppb
NO₂ 8.12 ppb
SO₂ 5.38 ppb
CO 181.08 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 may be unhealthy for sensitive groups. The general public is not likely to be affected.