Today | Weather | Tuesday, March 17, 2026

Weather in St. Petersburg, Florida

10:08 PM
Now
Cloudy Night
55° F
Feels Like 52°
Precipitation 0 %
Wind 12 mph
Humidity 51 %
Today
Cloudy Night
Day 61°
Night 54°
Precipitation 2 %
Wind 14 mph

St. Petersburg Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (March 17, 2025)
Sunny Weather

Day

64°

Night

59°

Wind

19 mph

UV Index

8

Precipitation

3 %

Air Quality in St. Petersburg

NOW
84 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.56 µg/m³
PM10 6.36 µg/m³
O3 0.065 ppm
NO2 0.1 ppb
SO2 0.1 ppb
CO 0.12 ppm
NH3 0.31 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.51.56 µg/m³
PM106.36 µg/m³
O3127.59 µg/m³
NO20.21 µg/m³
SO20.33 µg/m³
CO139.85 µg/m³
NH30.31 µg/m³
NO0 µg/m³