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Active Weather Warnings

Weather in McAllen, Texas

08:53 AM
Now
Cloudy Weather
81° F
Feels Like 90°
Precipitation 45 %
Wind 10 mph
UV Index (0 - 11+) 2
Humidity 83 %
Today
Sunny with a Chance of Thunderstorms
Day 88°
Night 75°
Precipitation 97 %
Wind 9 mph
UV Index (0 - 11+) 7

McAllen Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (May 23, 2025)
Cloudy Weather

Day

97°

Night

81°

Wind

11 mph

UV Index

12

Precipitation

1 %

Air Quality in McAllen

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

Pollutant Concentrations:

PM2.5 7.26 µg/m³
PM10 8.82 µg/m³
O3 0.018 ppm
NO2 0.5 ppb
SO2 0 ppb
CO 0.12 ppm
NH3 3.69 µg/m³
NO 0.14 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)
PM2.57.26 µg/m³
PM108.82 µg/m³
O334.44 µg/m³
NO21.03 µg/m³
SO20.11 µg/m³
CO139.91 µg/m³
NH33.69 µg/m³
NO0.14 µg/m³

Weather Alerts and Warnings for McAllen

Severe Future Possible

Flood Watch

Flood Watch issued May 23 at 3:02AM CDT until May 25 at 7:00AM CDT by NWS Brownsville TX
May 23, 3:02 AM May 25, 7:00 AM
WHAT: Flooding caused by excessive rainfall continues to be
possible.

WHERE: All of Deep South Texas and the Rio Grande Valley.

WHEN: Through Monday morning.

IMPACTS: Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Flooding may occur in poor drainage and urban areas. Storm drains
and ditches may become clogged with debris.

ADDITIONAL DETAILS:
- Portions of Deep South Texas have already received 3 to 6 inches
of rainfall over the last 48 hours. Additional rounds of heavy
rainfall are possible through this weekend. Saturated soil and
urban poor drainage could lead to isolated to scattered flash
flooding.
- http://www.weather.gov/safety/flood
+ Read More
You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
Updated: May 23, 7:25 AM Source: NWS Alert