Today | Weather | Friday, September 18, 2026

Weather in Pasadena, Texas

03:35 PM
Now
Cloudy Weather
93° F
Feels Like 97°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 4
Humidity 41 %
Today
Cloudy Weather
Day 93°
Night 75°
Precipitation 25 %
Wind 8 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.

Pasadena Weather Forecast Updated

57 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 18, 2025)
Cloudy Night

Day

90°

Night

73°

Wind

6 mph

Precipitation

25 %

Air Quality in Pasadena

NOW
43 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.62 µg/m³
PM10 7.12 µg/m³
O3 0.046 ppm
NO2 0.2 ppb
SO2 0.1 ppb
CO 0.11 ppm
NH3 0.03 µg/m³
NO 0.05 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)
PM2.52.62 µg/m³
PM107.12 µg/m³
O390.66 µg/m³
NO20.42 µg/m³
SO20.37 µg/m³
CO120.69 µg/m³
NH30.03 µg/m³
NO0.05 µg/m³