Today | Weather | Thursday, December 4, 2025

Weather in Modesto, California

01:30 AM
Now
Cloudy Night
43° F
Feels Like 43°
Precipitation 0 %
Wind 4 mph
Humidity 93 %
Today
Cloudy Weather
Day 52°
Night 39°
Precipitation 0 %
Wind 4 mph
UV Index (0 - 11+) 2

Modesto Weather Forecast Updated

12 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (December 4, 2024)
Foggy Weather

Day

66°

Night

39°

Wind

2 mph

Precipitation

0 %

Air Quality in Modesto

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

Pollutant Concentrations:

PM2.5 23.88 µg/m³
PM10 31.27 µg/m³
O3 0.008 ppm
NO2 16.7 ppb
SO2 0.2 ppb
CO 0.32 ppm
NH3 1.53 µg/m³
NO 0.02 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)
PM2.523.88 µg/m³
PM1031.27 µg/m³
O314.97 µg/m³
NO231.41 µg/m³
SO20.58 µg/m³
CO367.5 µg/m³
NH31.53 µg/m³
NO0.02 µg/m³