Today | Weather | Thursday, May 21, 2026

Weather in Santa Maria, California

08:20 AM
Now
Cloudy Weather
54° F
Feels Like 54°
Precipitation 0 %
Wind 4 mph
UV Index (0 - 11+) 1
Humidity 88 %
Today
Cloudy Weather
Day 72°
Night 50°
Precipitation 25 %
Wind 9 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.

Santa Maria Weather Forecast Updated

12 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (May 21, 2025)
Cloudy Weather

Day

72°

Night

48°

Wind

9 mph

UV Index

11

Precipitation

25 %

Air Quality in Santa Maria

NOW
40 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 7.65 µg/m³
PM10 26.48 µg/m³
O3 0.043 ppm
NO2 0.8 ppb
SO2 0.5 ppb
CO 0.10 ppm
NH3 0 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 considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.57.65 µg/m³
PM1026.48 µg/m³
O384.34 µg/m³
NO21.47 µg/m³
SO21.28 µg/m³
CO118.26 µg/m³
NH30 µg/m³
NO0.1 µg/m³