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How Weather Patterns Affect Air Quality
Discover how wind, rain, temperature, and humidity change pollution levels in urban areas.
Dr. Rajesh KumarApril 10, 202512 min read
Weather determines whether pollutants disperse, accumulate near the ground, or are washed out of the atmosphere. That is why air quality can change quickly even when emissions remain similar.
Temperature inversions
During an inversion, warm air traps cooler polluted air near the ground. Valley cities are especially vulnerable during calm winter mornings.
Wind and rain
- Strong winds generally disperse pollution
- Calm conditions allow pollutants to build up
- Wind direction moves pollution toward downwind communities
- Rain removes airborne particles through wet deposition
Seasonal patterns
- Summer heat and sunlight can increase ground-level ozone
- Winter heating and inversions can trap particulate pollution
- Spring and autumn conditions are often more variable
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