This map shows where weather is most comfortable across the United States during July, based on Perfect Weather Index scores averaged across recent years.
Scores combine temperature, sunshine, humidity, and wind to highlight regions that consistently offer the most pleasant outdoor conditions for the month.
The top performing areas in July share a common advantage — they can consistently moderate summer heat through a combination of elevation, marine influence, and lower humidity. Lower humidity, elevation-driven cooler mornings, and frequent clear-sky days keep comfort scores high even when afternoon temperatures run warm.
Oregon leads the nation in July. Much of the state benefits from moderate temperatures, low humidity, and reduced storm frequency. Coastal influences and higher terrain limit extreme heat while interior valleys remain more comfortable than comparable regions farther south.
Washington follows closely, particularly western and mountainous areas where cooler marine air and elevation maintain favorable summer conditions.
Idaho and high-elevation areas of California — particularly the Sierra Nevada around Lake Tahoe — deliver consistently comfortable July conditions thanks to cooler nights and low humidity.
July is the peak month for mountain national parks. Yellowstone and the surrounding high-elevation areas of Wyoming, Montana, and Idaho are among the most comfortable destinations in the country. Rocky Mountain National Park and Yosemite also offer excellent high-elevation conditions, though afternoon thunderstorms are common at elevation — typically brief and offset by otherwise comfortable temperatures.
(Based on statewide average Perfect Weather Index scores.)
July requires the most strategic destination choice of any month. High-elevation areas of the West and the Pacific Northwest are the clear winners. Outside of these regions, summer heat becomes increasingly difficult to avoid — particularly at lower elevations and east of the Rockies.
For a detailed look at how July 2025 specifically played out, see the July 2025 weather recap.
Data Note:
This analysis is based on National Weather Service forecast data and represents modeled conditions, not verified observations. Results reflect relative comfort patterns for July and may vary from year to year.
→ Planning a mountain park visit this month? See our Mountain National Parks Weather Guide