Today | Weather | Sunday, January 18, 2026

Weather in Fremont, California

11:52 PM
Now
Night
46° F
Feels Like 45°
Precipitation 0 %
Wind 6 mph
Humidity 77 %
Today
Sunny Weather
Day 70°
Night 43°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 3

Fremont Weather Forecast Updated

52 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (January 18, 2025)
Cloudy Weather

Day

57°

Night

37°

Wind

4 mph

UV Index

3

Precipitation

0 %

Air Quality in Fremont

NOW
105 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 37.35 µg/m³
PM10 46.18 µg/m³
O3 0.027 ppm
NO2 9.4 ppb
SO2 0.5 ppb
CO 0.30 ppm
NH3 0.24 µg/m³
NO 0 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:

Members of sensitive groups may experience health effects. The general public is not likely to be affected.

Show raw pollutant concentrations (µg/m³)
PM2.537.35 µg/m³
PM1046.18 µg/m³
O352.43 µg/m³
NO217.68 µg/m³
SO21.39 µg/m³
CO346.33 µg/m³
NH30.24 µg/m³
NO0 µg/m³