Today | Weather | Saturday, April 18, 2026

Active Weather Warnings

Weather in Denver, Colorado

02:58 AM

Now

28° F

Feels Like 21°

Precipitation 2 %

Wind 8 mph

Humidity 57 %

Today

Day 61°

Night 37°

Precipitation 0 %

Wind 7 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.

Denver Weather Forecast Updated

42 minutes ago

Last updated on April 18, 2026 at 2:15 AM

Weather Forecast History

Last Year's Weather on This Day (April 18, 2025)

Day

36°

Night

28°

Wind

8 mph

UV Index

Precipitation

96 %

Air Quality in Denver

NOW

49 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 0.83 µg/m³

PM₁₀ 0.91 µg/m³

O₃ 0.053 ppm

NO₂ 0.5 ppb

SO₂ 0.1 ppb

CO 0.11 ppm

NH₃ 5.17 µg/m³

NO 0 µg/m³

PM_2.5 – 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)

PM_2.5 – 0.83 µg/m³

PM₁₀ – 0.91 µg/m³

O₃ – 103.88 µg/m³

NO₂ – 0.93 µg/m³

SO₂ – 0.16 µg/m³

CO – 125.83 µg/m³

NH₃ – 5.17 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Denver

Severe Future Possible

Freeze Watch

Freeze Watch issued April 16 at 2:37AM MDT until April 18 at 8:00AM MDT by NWS Denver CO

Apr 17, 8:00 PM → Apr 18, 8:00 AM

WHAT: Prolonged sub-freezing temperatures reaching 18 to 25
degrees.

WHERE: All of the Front Range Urban Corridor and northeast plains
of Colorado.

WHEN: From Friday evening through Saturday morning.

IMPACTS: If not drained or protected, damage to above ground
irrigation lines will likely occur. A hard freeze could kill
sensitive vegetation and damage fruit trees.

+ Read More

Disconnect water hoses. Drain above ground irrigation lines. Take steps now to protect tender plants from the cold.

Updated: Apr 16, 10:00 AM Source: NWS Alert

Moderate Expected Likely

Freeze Warning

Freeze Warning issued April 17 at 2:46PM MDT until April 18 at 8:00AM MDT by NWS Denver CO