Do certain weather conditions lead to more home runs?

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

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HRF forecast value available for each contest, with detailed data throughout the 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™
Baltimore, MD broken clouds 75 8
Bronx, NY clear sky 69 8
Houston, TX scattered clouds 78 8
Boston, MA broken clouds 68 7
Washington, DC broken clouds 73 7
Atlanta, GA overcast clouds 69 6
Queens, NY broken clouds 69 6
Philadelphia, PA broken clouds 73 5
Williamsport, PA clear sky 62 4
Pittsburgh, PA broken clouds 58 4
Tampa Bay, FL scattered clouds 82 4
Anaheim, CA clear sky 63 3
Arlington, TX overcast clouds 64 3
Los Angeles, CA clear sky 55 3
Miami, FL broken clouds 83 3
Oakland, CA clear sky 55 3
San Diego, CA few clouds 56 3
San Francisco, CA clear sky 54 3
Cincinnati, OH broken clouds 54 2
Cleveland, OH overcast clouds 55 2
Detroit, MI few clouds 52 2
St. Louis, MO scattered clouds 51 2
Chicago (AL), IL few clouds 48 1
Chicago (NL), IL few clouds 49 1
Denver, CO snow 28 1
Kansas City, MO broken clouds 43 1
Milwaukee, WI few clouds 45 1
Minneapolis, MN overcast clouds 38 1
Phoenix, AZ clear sky 51 1
Seattle, WA clear sky 40 1
Toronto, ON clear sky 51 1
Data last updated: 1730991368
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