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Today | Weather | Thursday, March 12, 2026
Active Weather Warnings

Weather in McAllen, Texas

01:36 PM
Now
Sunny Weather
75° F
Feels Like 79°
Precipitation 0 %
Wind 15 mph
UV Index (0 - 11+) 7
Humidity 17 %
Today
Cloudy Weather
Day 82°
Night 52°
Precipitation 4 %
Wind 14 mph
UV Index (0 - 11+) 8

Warning: High UV Index Today: 8

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

McAllen Weather Forecast Updated

37 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (March 12, 2025)
Cloudy Weather

Day

93°

Night

66°

Wind

14 mph

UV Index

8

Precipitation

2 %

Air Quality in McAllen

NOW
72 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4.02 µg/m³
PM10 6.02 µg/m³
O3 0.061 ppm
NO2 0.2 ppb
SO2 0.2 ppb
CO 0.12 ppm
NH3 2.1 µg/m³
NO 0.09 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.5 – 4.02 µg/m³
PM10 – 6.02 µg/m³
O3 – 119.91 µg/m³
NO2 – 0.47 µg/m³
SO2 – 0.58 µg/m³
CO – 141.5 µg/m³
NH3 – 2.1 µg/m³
NO – 0.09 µg/m³
View Hourly Air Quality Forecast

Weather Alerts and Warnings for McAllen

Severe Future Possible

Fire Weather Watch

Fire Weather Watch issued March 11 at 10:49PM CDT until March 12 at 7:00PM CDT by NWS Brownsville TX
Mar 12, 10:00 AM → Mar 12, 7:00 PM
...ELEVATED TO CRITICAL FIRE WEATHER RISK FOR THURSDAY...

.An elevated to critical risk for fire weather is possible on
Thursday in response to a continuation of low relative humidity
(RH) values, ongoing dryness/drought conditions (i.e. D2 Severe
Drought to D4 Exceptional Drought over the region), and at times
breezy nOrth- northwest winds. According to the Texas A&M Forest
Service, High Fire Danger is highlighted across much of the region
with a pocket of Very High Fire danger over the Lower Valley.
Additionally, Energy Release Component (ERC) values are expected
to be elevated with values ranging between 75-96%, and fuels are
expected to be dry to critically dry. A Fire Weather Watch is in
effect for Thursday for Brooks, Hidalgo, Kenedy, Willacy, and
Cameron counties, excluding the island from 10 AM CDT Thursday
till 7 Pm CDT Thursday evening.

* WINDS...10-20 mph gusting as high as 30 mph.

* RELATIVE HUMIDITY...As low as 15-30 percent.

* TEMPERATURES...Mid to upper 90s.

IMPACTS: Any fire that develops will catch and spread
quickly. Outdoor burning is not recommended.
+ Read More
A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. ATE
Updated: Mar 12, 6:02 AM Source: NWS Alert