Today | Weather | Monday, July 20, 2026

Weather in Port St. Lucie, Florida

05:58 AM
Now
Cloudy Night
79° F
Feels Like 88°
Precipitation 5 %
Wind 7 mph
Humidity 96 %
Today
Stormy Weather
Day 93°
Night 75°
Precipitation 56 %
Wind 10 mph
UV Index (0 - 11+) 9

Warning: High UV Index Today: 9

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.

Port St. Lucie Weather Forecast Updated

7 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (July 20, 2025)
Cloudy Night

Day

91°

Night

75°

Wind

5 mph

Precipitation

2 %

Air Quality in Port St. Lucie

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

Pollutant Concentrations:

PM2.5 9.47 µg/m³
PM10 13.75 µg/m³
O3 0.023 ppm
NO2 0.9 ppb
SO2 0.3 ppb
CO 0.09 ppm
NH3 0 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)
PM2.59.47 µg/m³
PM1013.75 µg/m³
O344.43 µg/m³
NO21.74 µg/m³
SO20.75 µg/m³
CO100.93 µg/m³
NH30 µg/m³
NO0 µg/m³