Asthma Weather Forecast for Portland, OR
Tuesday, August 11 · updated throughout the day · scores run 0–100, higher is a kinder day
Great
A great day for people with Asthma. Weather is on your side.
5-day outlook
Today
84
Great
Wed
54
Manageable
Thu
53
Manageable
Fri
53
Manageable
Sat
58
Manageable
How weather affects asthma
Not every weather factor hits every condition the same way. These are the inputs our Asthma scoring model weighs most heavily — and in Portland (West Coast), they interact with the local climate pattern: Seattle, San Francisco, and Los Angeles — Pacific coast weather trends and body-forecast scores.
Air quality
35% of scoreOzone, PM2.5, and other pollutants directly trigger airway inflammation and bronchoconstriction in asthma patients. With pollen data unavailable, AQI serves as the best available proxy for overall air irritant levels.
Temperature
20% of scoreCold air is one of the best-documented asthma triggers, causing airway dehydration and bronchoconstriction. Very hot air can also worsen symptoms through increased ozone and breathing difficulty.
Humidity
20% of scoreHigh humidity promotes dust mite and mold growth; very humid air also feels heavier and can trigger breathlessness. Low humidity dries airways.
Daily temperature swings
10% of scoreSudden temperature changes can trigger bronchoconstriction as airways struggle to condition rapidly changing air.
Wind
10% of scoreWind disperses allergens and particulates over greater distances and can increase irritant exposure for asthma sufferers.
This forecast uses Portland's weather. Yours should use your street's.
Get a Body Weather Forecast personalized to your exact location, your conditions, and your triggers. Free, no account needed to try.
Get Your Personal ForecastAsthma forecasts in other cities
- Seattle, WA
- San Francisco, CA
- Los Angeles, CA
- Phoenix, AZ
- Albuquerque, NM
- Boise, ID
- Denver, CO
- Minneapolis, MN
- Des Moines, IA
- Omaha, NE
- Wichita, KS
- Tulsa, OK
- Dallas, TX
- Houston, TX
- Chicago, IL
- Atlanta, GA
- Miami, FL
- New York, NY
- Boston, MA
- Washington, DC
- Detroit, MI
- San Diego, CA
- Tampa, FL
- Baltimore, MD
- St. Louis, MO
- Charlotte, NC
- Orlando, FL
- San Antonio, TX
- Sacramento, CA
- Pittsburgh, PA
- Las Vegas, NV
- Austin, TX
- Cincinnati, OH
- Kansas City, MO
- Columbus, OH
- Cleveland, OH
- Indianapolis, IN
- San Jose, CA
- Nashville, TN
- Virginia Beach, VA
- Providence, RI
- Milwaukee, WI
- Jacksonville, FL
- Oklahoma City, OK
- Raleigh, NC
- Memphis, TN
- Richmond, VA
- Louisville, KY
- New Orleans, LA
- Salt Lake City, UT
- Hartford, CT
- Buffalo, NY
- Birmingham, AL
- Rochester, NY
Other conditions in Portland
- Fibromyalgia forecast for Portland
- Migraine forecast for Portland
- Osteoarthritis forecast for Portland
- Peripheral Neuropathy forecast for Portland
- COPD forecast for Portland
- Long COVID forecast for Portland
- Psoriasis forecast for Portland
- Endometriosis forecast for Portland
- Inflammatory Bowel Disease forecast for Portland
Research behind the Asthma model
- Zheng XY, et al. 'Association between air pollutants and asthma emergency room visits and hospital admissions in time series studies: a systematic review and meta-analysis.' PLOS ONE. 2015;10(9):e0138146.
- D'Amato G, et al. 'Meteorological conditions, climate change, new emerging factors, and asthma and related allergic disorders.' World Allergy Organization Journal. 2015;8(1):25.
- D'Amato G, et al. 'Climate change and respiratory diseases.' European Respiratory Review. 2014;23(132):161-169.
Felt That is not a medical service. Forecast scores describe weather conditions associated with symptom changes in published research and community-reported patterns — they are not medical advice, diagnosis, or treatment. Individual responses to weather vary widely. Always consult your healthcare provider about managing your condition.