Today | Weather | Wednesday, May 20, 2026

Weather in Gainesville, Florida

12:43 AM
Now
Cloudy Night
73° F
Feels Like 75°
Precipitation 3 %
Wind 7 mph
Humidity 88 %
Today
Sunny with a Chance of Thunderstorms
Day 91°
Night 66°
Precipitation 55 %
Wind 7 mph
UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Gainesville Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (May 20, 2025)
Partly Sunny with Showers

Day

93°

Night

70°

Wind

8 mph

UV Index

12

Precipitation

40 %

Air Quality in Gainesville

NOW
25 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.95 µg/m³
PM10 3.58 µg/m³
O3 0.027 ppm
NO2 2.2 ppb
SO2 0.2 ppb
CO 0.10 ppm
NH3 0.21 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)
PM2.51.95 µg/m³
PM103.58 µg/m³
O352.47 µg/m³
NO24.08 µg/m³
SO20.62 µg/m³
CO119.49 µg/m³
NH30.21 µg/m³
NO0 µg/m³