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™
Arlington, TX clear sky 70 8
Phoenix, AZ broken clouds 65 8
Houston, TX broken clouds 66 7
San Diego, CA overcast clouds 56 5
Miami, FL clear sky 67 4
Tampa Bay, FL clear sky 60 4
Williamsport, PA clear sky 55 3
Anaheim, CA broken clouds 57 3
Atlanta, GA clear sky 58 3
Baltimore, MD clear sky 54 3
Bronx, NY scattered clouds 52 3
Cincinnati, OH clear sky 56 3
Denver, CO broken clouds 56 3
Kansas City, MO clear sky 58 3
Los Angeles, CA clear sky 56 3
Oakland, CA broken clouds 54 3
Philadelphia, PA clear sky 53 3
Queens, NY scattered clouds 51 3
San Francisco, CA broken clouds 53 3
St. Louis, MO clear sky 62 3
Washington, DC clear sky 58 3
Boston, MA few clouds 50 1
Chicago (AL), IL broken clouds 37 1
Chicago (NL), IL broken clouds 37 1
Cleveland, OH clear sky 35 1
Detroit, MI clear sky 33 1
Milwaukee, WI clear sky 32 1
Minneapolis, MN clear sky 38 1
Pittsburgh, PA clear sky 48 1
Seattle, WA overcast clouds 46 1
Toronto, ON clear sky 31 1
Data last updated: 1741748166
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