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Active Weather Warnings

Weather in Richardson, Texas

04:18 PM
Now
Cloudy Weather
100° F
Feels Like 108°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 5
Humidity 33 %
Today
Sunny Weather
Day 100°
Night 81°
Precipitation 1 %
Wind 6 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.

Richardson Weather Forecast Updated

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

Day

95°

Night

77°

Wind

10 mph

Precipitation

2 %

Air Quality in Richardson

NOW
33 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.34 µg/m³
PM10 5.77 µg/m³
O3 0.036 ppm
NO2 0.2 ppb
SO2 0.1 ppb
CO 0.07 ppm
NH3 0.4 µg/m³
NO 0.08 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)
PM2.53.34 µg/m³
PM105.77 µg/m³
O370.56 µg/m³
NO20.39 µg/m³
SO20.19 µg/m³
CO81.07 µg/m³
NH30.4 µg/m³
NO0.08 µg/m³

Weather Alerts and Warnings for Richardson

Moderate Expected Likely

Heat Advisory

Heat Advisory issued July 20 at 11:09AM CDT until July 21 at 8:00PM CDT by NWS Fort Worth TX
Jul 20, 12:00 PM Jul 21, 8:00 PM
WHAT: Heat index values up to 108 expected.

WHERE: Portions of north central, northeast, and south central
Texas.

WHEN: Until 8 PM CDT Tuesday.

IMPACTS: Hot temperatures and high humidity will increase the risk
for heat-related illnesses to occur, particularly for those working
or participating in outdoor activities.
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Take extra precautions when outside by staying hydrated, wearing lightweight and loose fitting clothing, and limiting strenuous activities to the early morning or evening. Check up on relatives and neighbors. Never leave young children or pets in an enclosed vehicle, even for a short time, as temperatures can quickly rise to life-threatening levels. Know the signs and symptoms of heat exhaustion and heat stroke. To reduce risk when outdoors, the occupational safety and health administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 911 ASAP if you or someone you know is exhibiting signs of heat stroke.
Updated: Jul 20, 3:07 PM Source: NWS Alert