The Perfect Weather Index (PWI) is a 1–10 rating system that ranks locations across the United States based on overall outdoor comfort.
Each day, every location receives a score.
Higher scores indicate more comfortable and enjoyable weather conditions.
A score of:
The goal of the PWI is simple:
Make it easy to find where the weather is just right.
What Goes Into the Score?
The Perfect Weather Index is built using official forecast data from the National Weather Service.
The scoring model evaluates multiple weather factors that affect how comfortable it feels to be outside, including:
These variables are evaluated together — not individually — to determine an overall comfort rating.
The index is designed to reflect real-world experience, not just a single weather metric.
Why Temperature Alone Isn’t Enough
A 72°F day sounds perfect — but:
The Perfect Weather Index accounts for these combined effects.
It measures how the full set of forecast conditions work together to shape outdoor comfort.
How the 1–10 Scale Works
Each location receives a score on a standardized 1–10 scale.
The scale is consistent nationwide and allows you to compare:
The scoring system is calibrated so that only truly exceptional conditions reach the top of the scale.
This prevents “inflated” ratings and keeps comparisons meaningful.
Why Some Regions Score Higher
Desert and Southwest locations frequently rank highly during winter months due to:
Conversely, regions experiencing:
will score lower.
The index reflects daily forecast conditions — not climate averages.
Where the Data Comes From
All forecasts used in the Perfect Weather Index come from:
National Weather Service (NWS)
via the National Digital Forecast Database (NDFD).
Data is updated regularly, and maps and rankings refresh with each forecast cycle.
What the Perfect Weather Index Is Not
The PWI is not:
It is a daily comfort ranking based on forecast conditions.
How to Use the PWI
You can use the Perfect Weather Index to:
The Philosophy Behind It
Weather affects how we experience a place.
The Perfect Weather Index was created to answer a simple question:
If you could be anywhere today for the weather alone — where would you go?
Now you can see the answer instantly.