Today | Weather | Thursday, December 18, 2025
Active Weather Warnings

Weather in Houston, Texas

06:56 AM
Now
Foggy Weather
63° F
Feels Like 61°
Precipitation 41 %
Wind 7 mph
Humidity 97 %
Today
Sunny with a Chance of Thunderstorms
Day 75°
Night 46°
Precipitation 55 %
Wind 12 mph
UV Index (0 - 11+) 3

Houston Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (December 18, 2024)
Sunny with a Chance of Thunderstorms

Day

75°

Night

48°

Wind

7 mph

UV Index

3

Precipitation

84 %

Air Quality in Houston

NOW
31 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.01 µg/m³
PM10 4.34 µg/m³
O3 0.034 ppm
NO2 0.6 ppb
SO2 0.2 ppb
CO 0.10 ppm
NH3 0.06 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)
PM2.52.01 µg/m³
PM104.34 µg/m³
O366.02 µg/m³
NO21.21 µg/m³
SO20.42 µg/m³
CO118.69 µg/m³
NH30.06 µg/m³
NO0 µg/m³

Weather Alerts and Warnings for Houston

Moderate Expected Likely

Dense Fog Advisory

Dense Fog Advisory issued December 17 at 8:24PM CST until December 18 at 9:00AM CST by NWS Houston/Galveston TX
Dec 17, 8:24 PM Dec 18, 9:00 AM
WHAT: Visibility one quarter mile or less in dense fog.

WHERE: Portions of south central and southeast Texas.

WHEN: Until 9 AM CST Thursday.

IMPACTS: Low visibility could make driving conditions hazardous.

ADDITIONAL DETAILS: Fog is developing across Southeast Texas this
evening, and is beginning to become dense in localized spots.
Dense fog is expected to become more widespread across the area
through the night and early morning hours on Thursday.
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If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Updated: Dec 18, 5:19 AM Source: NWS Alert