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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Detailed weather data and hourly index data for each park.

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 broken clouds 79 7
Tampa Bay, FL overcast clouds 56 5
Williamsport, PA clear sky 16 1
Anaheim, CA clear sky 69 1
Arlington, TX clear sky 32 1
Atlanta, GA snow 26 1
Baltimore, MD broken clouds 20 1
Boston, MA overcast clouds 19 1
Bronx, NY broken clouds 19 1
Chicago (AL), IL few clouds 1 1
Chicago (NL), IL few clouds 1 1
Cincinnati, OH overcast clouds 11 1
Cleveland, OH light snow 10 1
Denver, CO broken clouds 39 1
Detroit, MI overcast clouds 7 1
Houston, TX few clouds 35 1
Kansas City, MO clear sky 12 1
Los Angeles, CA clear sky 66 1
Milwaukee, WI clear sky -0 1
Minneapolis, MN clear sky 3 1
Oakland, CA few clouds 57 1
Philadelphia, PA overcast clouds 19 1
Phoenix, AZ clear sky 56 1
Pittsburgh, PA few clouds 16 1
Queens, NY broken clouds 19 1
San Diego, CA scattered clouds 69 1
San Francisco, CA clear sky 57 1
Seattle, WA clear sky 40 1
St. Louis, MO clear sky 8 1
Toronto, ON broken clouds 14 1
Washington, DC overcast clouds 21 1
Data last updated: 1737489366
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