Today | Weather | Saturday, July 4, 2026

Active Weather Warnings

Heat Advisory

Weather in Houston, Texas

05:14 PM

Now

97° F

Feels Like 100°

Precipitation 51 %

Wind 8 mph

UV Index (0 - 11+) 3

Humidity 46 %

Today

Day 97°

Night 79°

Precipitation 55 %

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.

Houston Weather Forecast Updated

Last updated on July 04, 2026 at 3:46 PM

Weather Forecast History

Last Year's Weather on This Day (July 4, 2025)

Day

91°

Night

79°

Wind

9 mph

UV Index

Precipitation

55 %

Air Quality in Houston

NOW

20 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 1.18 µg/m³

PM₁₀ 3.84 µg/m³

O₃ 0.022 ppm

NO₂ 0.1 ppb

SO₂ 0.1 ppb

CO 0.08 ppm

NH₃ 0.04 µg/m³

NO 0.05 µg/m³

PM_2.5 – 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)

PM_2.5 – 1.18 µg/m³

PM₁₀ – 3.84 µg/m³

O₃ – 42.63 µg/m³

NO₂ – 0.2 µg/m³

SO₂ – 0.17 µg/m³

CO – 93.02 µg/m³

NH₃ – 0.04 µg/m³

NO – 0.05 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Houston

Moderate Expected Likely

Heat Advisory

Heat Advisory issued July 4 at 5:48AM CDT until July 4 at 7:00PM CDT by NWS Houston/Galveston TX

Jul 4, 11:00 AM → Jul 4, 7:00 PM

WHAT: Heat index values up to 110 expected.

WHERE: Coastal Harris and Inland Harris Counties.

WHEN: From 11 AM this morning to 7 PM CDT this evening.

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

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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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Updated: Jul 4, 3:46 PM Source: NWS Alert