Today | Weather | Tuesday, April 7, 2026

Weather in Boulder, Colorado

07:36 AM
Now
Cloudy Weather
41° F
Feels Like 45°
Precipitation 7 %
Wind 4 mph
UV Index (0 - 11+) 1
Humidity 65 %
Today
Cloudy Weather
Day 70°
Night 48°
Precipitation 25 %
Wind 7 mph
UV Index (0 - 11+) 6

Boulder Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 7, 2025)
Sunny Weather

Day

68°

Night

46°

Wind

7 mph

UV Index

7

Precipitation

0 %

Air Quality in Boulder

NOW
31 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.68 µg/m³
PM10 3.24 µg/m³
O3 0.034 ppm
NO2 2.1 ppb
SO2 0.1 ppb
CO 0.11 ppm
NH3 6.45 µg/m³
NO 0.14 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)
PM2.52.68 µg/m³
PM103.24 µg/m³
O366.64 µg/m³
NO23.92 µg/m³
SO20.16 µg/m³
CO125.92 µg/m³
NH36.45 µg/m³
NO0.14 µg/m³