Today | Weather | Thursday, May 21, 2026

Weather in Syracuse, New York

11:19 AM
Now
Cloudy Weather
57° F
Feels Like 64°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 7
Humidity 44 %
Today
Cloudy Weather
Day 63°
Night 39°
Precipitation 1 %
Wind 9 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.

Syracuse Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (May 21, 2025)
Rainy Weather

Day

61°

Night

46°

Wind

11 mph

UV Index

2

Precipitation

100 %

Air Quality in Syracuse

NOW
27 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.54 µg/m³
PM10 0.72 µg/m³
O3 0.030 ppm
NO2 0.8 ppb
SO2 0.2 ppb
CO 0.10 ppm
NH3 1.83 µg/m³
NO 0.54 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)
PM2.50.54 µg/m³
PM100.72 µg/m³
O358.21 µg/m³
NO21.46 µg/m³
SO20.47 µg/m³
CO118.65 µg/m³
NH31.83 µg/m³
NO0.54 µg/m³