Today | Weather | Tuesday, October 21, 2025

Weather in Port St. Lucie, Florida

10:11 PM

Now

77° F

Feels Like 82°

Precipitation 0 %

Wind 5 mph

Humidity 86 %

Today

Day 88°

Night 70°

Precipitation 3 %

Wind 5 mph

Port St. Lucie Weather Forecast Updated

30 minutes ago

Last updated on October 21, 2025 9:41 PM

Weather Forecast History

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

Day

84°

Night

73°

Wind

11 mph

Precipitation

Air Quality in Port St. Lucie

NOW

21 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 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

PM_2.5 – 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)

PM_2.5 – 4.04 µg/m³

PM₁₀ – 5.3 µg/m³

O₃ – 43.51 µg/m³

NO₂ – 5.86 µg/m³

SO₂ – 0.17 µg/m³

CO – 125.45 µg/m³

NH₃ – 0.21 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast