Today | Weather | Wednesday, November 4, 2026

Active Weather Warnings

Dense Fog Advisory

Weather in Corvallis, Oregon

06:26 AM

Now

37° F

Feels Like 37°

Precipitation 0 %

Wind 2 mph

Humidity 90 %

Today

Day 59°

Night 39°

Precipitation 25 %

Wind 6 mph

UV Index (0 - 11+) 1

FROST FORECAST

Overnight Frost 2 AM – 2 AM

Corvallis Weather Forecast Updated

13 minutes ago

Last updated on November 04, 2026 at 6:13 AM

Weather Forecast History

Last Year's Weather on This Day (November 4, 2025)

Day

59°

Night

50°

Wind

4 mph

UV Index

Precipitation

100 %

Air Quality in Corvallis

NOW

20 AQI

Good air quality Dominant pollutant: PM_2.5

Pollutant Concentrations:

PM_2.5 4.86 µg/m³

PM₁₀ 5.11 µg/m³

O₃ 0.013 ppm

NO₂ 1.5 ppb

SO₂ 0 ppb

CO 0.14 ppm

NH₃ 0.08 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 – 4.86 µg/m³

PM₁₀ – 5.11 µg/m³

O₃ – 25.16 µg/m³

NO₂ – 2.8 µg/m³

SO₂ – 0.09 µg/m³

CO – 164.82 µg/m³

NH₃ – 0.08 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Corvallis

Moderate Expected Likely

Dense Fog Advisory

Dense Fog Advisory issued November 4 at 3:39AM PST until November 4 at 10:00AM PST by NWS Portland OR

Nov 4, 6:00 AM → Nov 4, 10:00 AM

WHAT: Visibility one quarter mile or less in dense fog.

WHERE: Benton County Lowlands, Lane County Lowlands, and Linn
County Lowlands.

WHEN: Until 10 AM PST this morning.

IMPACTS: Low visibility could make driving conditions hazardous.

+ Read More

If driving, slow down and leave plenty of distance ahead of you. Pedestrians and cyclists should wear bright or reflective clothing to increase the chances of being seen by others in poor visibility conditions.

Updated: Nov 4, 6:13 AM Source: NWS Alert