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How to Use Just Right Weather

  • Planning a trip this week? Start with Best Weather This Week for daily PWI rankings across U.S. cities, then check the 7-Day Weather Maps to see the full forecast picture before you go.
  • Planning a trip weeks or months out? Use Best Weather by Month to find which regions offer the most comfortable conditions during your travel window. September and October consistently rank as the strongest months nationwide.
  • Looking for good weather near you? Best Weather by State lets you narrow results to your state and find nearby cities with the highest PWI scores today.
  • Visiting a national park? Go straight to National Parks for 7-day PWI rankings across every U.S. national park and monument — updated each morning so you can plan your visit around the best conditions.
  • Curious about year-round weather? The 2025 Annual Rankings show which cities had the best weather across all 365 days of 2025, including annual PWI scores and perfect weather day counts for over 37,000 U.S. locations.
  • Want rankings based on your own preferences? Find Your Perfect Weather lets you set your ideal temperature range, humidity tolerance, wind, and rain limits — and instantly shows which cities best match your personal conditions today.

What Is the Perfect Weather Index?

The Perfect Weather Index is a daily comfort score calculated from five National Weather Service forecast factors. Each factor is weighted and combined into a single score from 1 (poor) to 10 (perfect). A score of 8 or higher means genuinely excellent conditions for outdoor activity. Most days across most of the U.S. fall in the 4–7 range.

Temperature Comfort peaks around the low-to-mid 70s°F. Extreme heat and cold both reduce the score.
Sunshine Clear skies and low cloud cover push scores higher. Overcast days score lower.
Humidity Lower humidity means more comfortable conditions. High humidity reduces the score even on warm days.
Wind Light winds score best. Strong or gusty winds reduce outdoor comfort.
Precipitation Dry days score higher. Rain, snow, or high precipitation probability all reduce the score.

The PWI makes it easy to compare weather comfort across different cities and regions at a glance — without having to interpret multiple separate forecasts. Rather than asking "what will the temperature be?", it answers the more useful question: "where will the weather actually feel good?"

Learn more about how the PWI is calculated →