Why is the air quality unhealthy in Yosemite?
Why is the air quality unhealthy in Yosemite? While California's air pollution regulations are among the strictest in the country, topography and geography combine to trap air pollutants in its Central Valley. Westerly winds often blow that pollution into Yosemite, especially during the summer.
Why does Yosemite get so cold?
Elevation plays a major role in temperature and precipitation variability. Since Yosemite varies in elevation from 2,000 feet to over 13,000 feet, the lower foothills of the park can be experiencing the rebirth of spring while the higher elevations remain in the grip of winter.
Are mosquitoes a problem in Yosemite?
Many mosquitoes are most active at dusk and dawn, mainly during the summer. Be sure to use insect repellent and wear long sleeves and pants or consider staying indoors during these hours.