Today | Weather | Wednesday, March 18, 2026

Weather in Largo, Florida

03:08 AM
Now
Cloudy Night
48° F
Feels Like 43°
Precipitation 0 %
Wind 10 mph
Humidity 50 %
Today
Cloudy Weather
Day 70°
Night 54°
Precipitation 3 %
Wind 12 mph
UV Index (0 - 11+) 8

Warning: High UV Index Today: 8

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.

Largo Weather Forecast Updated

29 minutes ago
Last updated on

Air Quality in Largo

NOW
79 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.2 µg/m³
PM10 3.73 µg/m³
O3 0.063 ppm
NO2 0.4 ppb
SO2 0.2 ppb
CO 0.12 ppm
NH3 0.54 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)
PM2.51.2 µg/m³
PM103.73 µg/m³
O3124.06 µg/m³
NO20.7 µg/m³
SO20.57 µg/m³
CO142.24 µg/m³
NH30.54 µg/m³
NO0 µg/m³