Today | Weather | Saturday, September 19, 2026

Weather in Port St. Lucie, Florida

05:38 AM
Now
Cloudy Night
73° F
Feels Like 79°
Precipitation 49 %
Wind 2 mph
Humidity 100 %
Today
Sunny with a Chance of Thunderstorms
Day 88°
Night 72°
Precipitation 85 %
Wind 6 mph
UV Index (0 - 11+) 7

Port St. Lucie Weather Forecast Updated

38 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 19, 2025)
Cloudy Night

Day

86°

Night

73°

Wind

6 mph

Precipitation

55 %

Air Quality in Port St. Lucie

NOW
14 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 3.45 µg/m³
PM10 3.93 µg/m³
O3 0.005 ppm
NO2 2 ppb
SO2 0 ppb
CO 0.12 ppm
NH3 0.32 µg/m³
NO 0.01 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)
PM2.53.45 µg/m³
PM103.93 µg/m³
O310.47 µg/m³
NO23.8 µg/m³
SO20.12 µg/m³
CO140.44 µg/m³
NH30.32 µg/m³
NO0.01 µg/m³