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™
Miami, FL few clouds 54 7
Tampa Bay, FL scattered clouds 50 4
Los Angeles, CA clear sky 51 3
Phoenix, AZ clear sky 56 3
San Diego, CA overcast clouds 52 3
Williamsport, PA overcast clouds 24 1
Anaheim, CA clear sky 50 1
Arlington, TX clear sky 35 1
Atlanta, GA broken clouds 34 1
Baltimore, MD clear sky 34 1
Boston, MA broken clouds 25 1
Bronx, NY light snow 29 1
Chicago (AL), IL scattered clouds 16 1
Chicago (NL), IL scattered clouds 16 1
Cincinnati, OH scattered clouds 26 1
Cleveland, OH overcast clouds 25 1
Denver, CO scattered clouds 38 1
Detroit, MI clear sky 20 1
Houston, TX clear sky 44 1
Kansas City, MO clear sky 19 1
Milwaukee, WI clear sky 8 1
Minneapolis, MN scattered clouds 2 1
Oakland, CA broken clouds 51 1
Philadelphia, PA few clouds 30 1
Pittsburgh, PA few clouds 26 1
Queens, NY light snow 29 1
San Francisco, CA broken clouds 51 1
Seattle, WA clear sky 47 1
St. Louis, MO clear sky 25 1
Toronto, ON clear sky 14 1
Washington, DC clear sky 35 1
Data last updated: 1734785766
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