Today | Weather | Thursday, May 21, 2026

Weather in St. Paul, Minnesota

10:19 AM
Now
Cloudy Weather
52° F
Feels Like 48°
Precipitation 0 %
Wind 10 mph
UV Index (0 - 11+) 3
Humidity 74 %
Today
Cloudy Weather
Day 66°
Night 48°
Precipitation 3 %
Wind 10 mph
UV Index (0 - 11+) 6

St. Paul Weather Forecast Updated

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

Day

52°

Night

41°

Wind

6 mph

UV Index

2

Precipitation

97 %

Air Quality in St. Paul

NOW
30 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.76 µg/m³
PM10 3.05 µg/m³
O3 0.033 ppm
NO2 0.9 ppb
SO2 0.1 ppb
CO 0.11 ppm
NH3 7.43 µg/m³
NO 0.43 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)
PM2.52.76 µg/m³
PM103.05 µg/m³
O363.92 µg/m³
NO21.77 µg/m³
SO20.37 µg/m³
CO126.74 µg/m³
NH37.43 µg/m³
NO0.43 µg/m³