Today | Weather | Saturday, May 16, 2026

Weather in Greeley, Colorado

09:11 AM
Now
Cloudy Weather
64° F
Feels Like 70°
Precipitation 9 %
Wind 6 mph
UV Index (0 - 11+) 3
Humidity 32 %
Today
Sunny with a Chance of Thunderstorms
Day 82°
Night 50°
Precipitation 55 %
Wind 9 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.

Greeley Weather Forecast Updated

45 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (May 16, 2025)
Partly Sunny with Showers

Day

73°

Night

45°

Wind

14 mph

UV Index

11

Precipitation

49 %

Air Quality in Greeley

NOW
28 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.19 µg/m³
PM10 4.11 µg/m³
O3 0.030 ppm
NO2 3.5 ppb
SO2 0.2 ppb
CO 0.11 ppm
NH3 4.07 µg/m³
NO 2.29 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)
PM2.52.19 µg/m³
PM104.11 µg/m³
O358.93 µg/m³
NO26.61 µg/m³
SO20.4 µg/m³
CO128.11 µg/m³
NH34.07 µg/m³
NO2.29 µg/m³