Today | Weather | Tuesday, October 21, 2025

Weather in Port St. Lucie, Florida

10:11 PM
Now
Cloudy Night
77° F
Feels Like 82°
Precipitation 0 %
Wind 5 mph
Humidity 86 %
Today
Cloudy Night
Day 88°
Night 70°
Precipitation 3 %
Wind 5 mph

Port St. Lucie Weather Forecast Updated

30 minutes ago
Last updated on

Weather Forecast History

Last Year's Weather on This Day (October 21, 2024)

Rainy Weather

Day

84°

Night

73°

Wind

11 mph

Precipitation

87

Air Quality in Port St. Lucie

NOW
21 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4.04 µg/m³
PM10 5.3 µg/m³
O3 0.022 ppm
NO2 3.1 ppb
SO2 0.1 ppb
CO 0.11 ppm
NH3 0.21 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)
PM2.54.04 µg/m³
PM105.3 µg/m³
O343.51 µg/m³
NO25.86 µg/m³
SO20.17 µg/m³
CO125.45 µg/m³
NH30.21 µg/m³
NO0 µg/m³