Do certain weather conditions lead to more home runs?

Yes! Weather conditions can change the distance a batted ball travels by more than 20%. Home Run Forecast provides a simple way to see the if weather will help or hinder baseball flight during a game. The Home Run Forecast Index demonstrates a strong correlation with the number of HRs hit and runs scored in big league games. Check out our Premium Subscription for on-demand HRFI forecast data by team and for each game.

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Current Weather Conditions and HRF Index

The table below shows the Home Run Forecast Index (HRFI) value for each big league ballpark. The HRFI ranges from 1 to 10, with 10 indicating the most favorable weather conditions for ball fight and 1 indicating least favorable. Learn more about how we calculate this index here.

This data is updated hourly at the top of the hour. For ballparks with a retractable roof, the index is calculated for open roof conditions. Check local sources for roof status. For ballparks with a permanent roof, the index is calculated for indoor conditions.

Ballpark Location Sky Cover Temperature (°F) Home Run Forecast Index™
Tampa, FL clear sky 86 10
Kansas City, MO broken clouds 70 9
St. Louis, MO overcast clouds 77 9
Houston, TX overcast clouds 82 8
Phoenix, AZ broken clouds 60 5
Anaheim, CA clear sky 58 4
Arlington, TX overcast clouds 67 4
Atlanta, GA broken clouds 72 4
Cincinnati, OH broken clouds 74 4
Los Angeles, CA clear sky 56 3
Miami, FL broken clouds 84 3
Pittsburgh, PA clear sky 59 3
San Diego, CA scattered clouds 56 3
San Francisco, CA scattered clouds 52 3
Minneapolis, MN light rain 35 2
Washington, DC overcast clouds 56 2
Sacramento, CA clear sky 50 1
Baltimore, MD broken clouds 56 1
Boston, MA clear sky 41 1
Bronx, NY clear sky 46 1
Chicago (AL), IL moderate rain 45 1
Chicago (NL), IL moderate rain 44 1
Cleveland, OH overcast clouds 40 1
Denver, CO overcast clouds 45 1
Detroit, MI overcast clouds 36 1
Milwaukee, WI heavy intensity rain 40 1
Philadelphia, PA broken clouds 54 1
Queens, NY clear sky 46 1
Seattle, WA overcast clouds 44 1
Toronto, ON light snow 33 1
Data last updated: 4:56:07 PM
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