Today | Weather | Saturday, September 19, 2026

Weather in St. Paul, Minnesota

12:39 AM
Now
Cloudy Weather
57° F
Feels Like 54°
Precipitation 6 %
Wind 7 mph
Humidity 98 %
Today
Rainy Weather
Day 63°
Night 54°
Precipitation 60 %
Wind 8 mph
UV Index (0 - 11+) 1

St. Paul Weather Forecast Updated

57 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 19, 2025)
Stormy Weather

Day

73°

Night

61°

Wind

6 mph

Precipitation

96 %

Air Quality in St. Paul

NOW
24 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 5.67 µg/m³
PM10 5.82 µg/m³
O3 0.023 ppm
NO2 1.6 ppb
SO2 0.1 ppb
CO 0.15 ppm
NH3 1.15 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)
PM2.55.67 µg/m³
PM105.82 µg/m³
O344.28 µg/m³
NO23.08 µg/m³
SO20.32 µg/m³
CO176.31 µg/m³
NH31.15 µg/m³
NO0 µg/m³