Today | Weather | Friday, September 18, 2026

Weather in Cedar Park, Texas

08:25 AM
Now
Cloudy Weather
81° F
Feels Like 88°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 1
Humidity 77 %
Today
Sunny Weather
Day 95°
Night 73°
Precipitation 1 %
Wind 6 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.

Cedar Park Weather Forecast Updated

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

Day

95°

Night

72°

Wind

4 mph

UV Index

80

Precipitation

2 %

Air Quality in Cedar Park

NOW
23 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.56 µg/m³
PM10 4.41 µg/m³
O3 0.024 ppm
NO2 4 ppb
SO2 0.4 ppb
CO 0.14 ppm
NH3 0.47 µg/m³
NO 0.02 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)
PM2.52.56 µg/m³
PM104.41 µg/m³
O348.08 µg/m³
NO27.62 µg/m³
SO21.12 µg/m³
CO155.79 µg/m³
NH30.47 µg/m³
NO0.02 µg/m³