Today | Weather | Sunday, May 17, 2026

Weather in Fremont, California

12:43 AM
Now
Cloudy Night
52° F
Feels Like 50°
Precipitation 0 %
Wind 6 mph
Humidity 77 %
Today
Sunny Weather
Day 75°
Night 64°
Precipitation 0 %
Wind 13 mph
UV Index (0 - 11+) 10

Warning: High UV Index Today: 10

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.

Fremont Weather Forecast Updated

10 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (May 17, 2025)
Cloudy Weather

Day

68°

Night

50°

Wind

15 mph

UV Index

10

Precipitation

4 %

Air Quality in Fremont

NOW
45 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.47 µg/m³
PM10 17.54 µg/m³
O3 0.048 ppm
NO2 0.2 ppb
SO2 0.2 ppb
CO 0.11 ppm
NH3 0.01 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:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.53.47 µg/m³
PM1017.54 µg/m³
O394.42 µg/m³
NO20.42 µg/m³
SO20.6 µg/m³
CO123.62 µg/m³
NH30.01 µg/m³
NO0 µg/m³