Today | Weather | Wednesday, March 18, 2026

Weather in Roseville, California

03:43 AM
Now
Night
59° F
Feels Like 57°
Precipitation 0 %
Wind 6 mph
Humidity 88 %
Today
Sunny Weather
Day 88°
Night 55°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 5

Roseville Weather Forecast Updated

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

Day

61°

Night

39°

Wind

4 mph

UV Index

5

Precipitation

5 %

Air Quality in Roseville

NOW
152 AQI
Unhealthy air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 59.87 µg/m³
PM10 67.52 µg/m³
O3 0.029 ppm
NO2 17.1 ppb
SO2 2.1 ppb
CO 0.38 ppm
NH3 2.43 µg/m³
NO 0.12 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:

Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.

Show raw pollutant concentrations (µg/m³)
PM2.559.87 µg/m³
PM1067.52 µg/m³
O357.21 µg/m³
NO232.18 µg/m³
SO25.42 µg/m³
CO433.73 µg/m³
NH32.43 µg/m³
NO0.12 µg/m³