Today | Weather | Monday, July 20, 2026
Active Weather Warnings

Weather in St. Paul, Minnesota

03:36 PM
Now
Cloudy Weather
97° F
Feels Like 97°
Precipitation 20 %
Wind 15 mph
UV Index (0 - 11+) 5
Humidity 36 %
Today
Sunny with a Chance of Thunderstorms
Day 97°
Night 66°
Precipitation 49 %
Wind 12 mph
UV Index (0 - 11+) 6

St. Paul Weather Forecast Updated

5 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (July 20, 2025)
Cloudy Night

Day

81°

Night

64°

Wind

6 mph

Precipitation

16 %

Air Quality in St. Paul

NOW
32 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 5.1 µg/m³
PM10 5.31 µg/m³
O3 0.035 ppm
NO2 0.3 ppb
SO2 0 ppb
CO 0.09 ppm
NH3 2.56 µg/m³
NO 0.11 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)
PM2.55.1 µg/m³
PM105.31 µg/m³
O368.44 µg/m³
NO20.51 µg/m³
SO20.13 µg/m³
CO104.62 µg/m³
NH32.56 µg/m³
NO0.11 µg/m³

Weather Alerts and Warnings for St. Paul

Moderate Expected Likely

Heat Advisory

Heat Advisory issued July 20 at 11:55AM CDT until July 20 at 6:00PM CDT by NWS Twin Cities/Chanhassen MN
Jul 20, 12:00 PM Jul 20, 6:00 PM
WHAT: Heat index values of 95 to 100 expected.

WHERE: Anoka, Carver, Dakota, Hennepin, Ramsey, Scott, Washington,
Rice, and Goodhue Counties.

WHEN: Until 6 PM CDT this evening.

IMPACTS: Hot temperatures and high humidity may cause heat
illnesses.

ADDITIONAL DETAILS: The highest heat indices will occur in the
early to mid afternoon hours before drier air moves in.
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Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Updated: Jul 20, 3:30 PM Source: NWS Alert