Today | Weather | Wednesday, May 20, 2026

Weather in Merced, California

02:50 PM
Now
Cloudy Weather
90° F
Feels Like 95°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 7
Humidity 15 %
Today
Cloudy Weather
Day 91°
Night 57°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 8

Warning: High UV Index Today: 8

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Merced Weather Forecast Updated

Last updated on

Air Quality in Merced

NOW
88 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.74 µg/m³
PM10 4.24 µg/m³
O3 0.066 ppm
NO2 0.3 ppb
SO2 0.1 ppb
CO 0.09 ppm
NH3 0.97 µg/m³
NO 0.1 µg/m³
PM2.5 – 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.52.74 µg/m³
PM104.24 µg/m³
O3129.97 µg/m³
NO20.57 µg/m³
SO20.29 µg/m³
CO108.72 µg/m³
NH30.97 µg/m³
NO0.1 µg/m³