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Today | Weather | Thursday, August 14, 2025

Weather in Thornton, Colorado

06:10 AM
Now
Cloudy NightCloudy night, overcast skies at night with no rain.
70° F
Feels Like 68°
Precipitation 0 %
Wind 7 mph
Humidity 26 %
Today
Stormy WeatherStormy weather, thunderstorms.
Day 99°
Night 66°
Precipitation 55 %
Wind 8 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.

Thornton Weather Forecast Updated

20 minutes ago
Last updated on

Weather Forecast History

Last Year's Weather on This Day (August 14, 2024)

Sunny with a Chance of ThunderstormsSunny weather with a possibility of isolated thunderstorms developing later in the day.

Day

90°

Night

59°

Wind

7 mph

UV Index

9

Precipitation

40

Air quality in Thornton

NOW
62 AQI
Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 14.74 µg/m³
PM10 15.02 µg/m³
O₃ 28.43 ppb
NO₂ 7.11 ppb
SO₂ 0.66 ppb
CO 209.14 ppb
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.