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™
Houston, TX clear sky 96 10
Phoenix, AZ few clouds 95 10
Anaheim, CA overcast clouds 72 8
Los Angeles, CA clear sky 70 8
Oakland, CA few clouds 73 8
San Francisco, CA few clouds 68 8
Arlington, TX clear sky 94 7
San Diego, CA broken clouds 71 7
Atlanta, GA scattered clouds 61 6
Denver, CO scattered clouds 74 4
Miami, FL overcast clouds 83 4
Tampa Bay, FL scattered clouds 83 4
Baltimore, MD broken clouds 56 3
Boston, MA overcast clouds 51 3
Bronx, NY scattered clouds 56 3
Philadelphia, PA broken clouds 56 3
Queens, NY scattered clouds 57 3
Seattle, WA overcast clouds 59 3
Washington, DC overcast clouds 55 3
Detroit, MI overcast clouds 49 2
Williamsport, PA overcast clouds 47 1
Chicago (AL), IL broken clouds 45 1
Chicago (NL), IL broken clouds 45 1
Cincinnati, OH broken clouds 47 1
Cleveland, OH overcast clouds 47 1
Kansas City, MO clear sky 58 1
Milwaukee, WI scattered clouds 49 1
Minneapolis, MN few clouds 53 1
Pittsburgh, PA scattered clouds 49 1
St. Louis, MO scattered clouds 56 1
Toronto, ON broken clouds 49 1
Data last updated: 1729029368
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