Today | Weather | Monday, September 14, 2026

Weather in Greeley, Colorado

12:19 AM
Now
Cloudy Night
64° F
Feels Like 63°
Precipitation 47 %
Wind 7 mph
Humidity 60 %
Today
Sunny with a Chance of Thunderstorms
Day 90°
Night 50°
Precipitation 55 %
Wind 6 mph
UV Index (0 - 11+) 5

Greeley Weather Forecast Updated

33 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 14, 2025)
Partly Sunny with Showers

Day

75°

Night

45°

Wind

8 mph

UV Index

50

Precipitation

49 %

Air Quality in Greeley

NOW
23 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.62 µg/m³
PM10 4.63 µg/m³
O3 0.025 ppm
NO2 1.6 ppb
SO2 0.1 ppb
CO 0.09 ppm
NH3 0.45 µg/m³
NO 0 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
PM104.63 µg/m³
O348.88 µg/m³
NO23.04 µg/m³
SO20.27 µg/m³
CO98.92 µg/m³
NH30.45 µg/m³
NO0 µg/m³