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 broken clouds 78 5
Oakland, CA light rain 57 5
Tampa Bay, FL scattered clouds 73 5
Anaheim, CA clear sky 60 4
Baltimore, MD heavy intensity rain 51 3
Bronx, NY overcast clouds 55 3
Los Angeles, CA clear sky 59 3
Philadelphia, PA overcast clouds 56 3
Phoenix, AZ clear sky 63 3
Queens, NY broken clouds 56 3
San Diego, CA clear sky 60 3
San Francisco, CA overcast clouds 55 3
Williamsport, PA moderate rain 49 1
Arlington, TX clear sky 54 1
Atlanta, GA clear sky 50 1
Boston, MA scattered clouds 45 1
Chicago (AL), IL light rain 34 1
Chicago (NL), IL overcast clouds 34 1
Cincinnati, OH overcast clouds 46 1
Cleveland, OH few clouds 39 1
Denver, CO scattered clouds 39 1
Detroit, MI clear sky 39 1
Houston, TX clear sky 57 1
Kansas City, MO clear sky 46 1
Milwaukee, WI overcast clouds 32 1
Minneapolis, MN light snow 27 1
Pittsburgh, PA broken clouds 40 1
Seattle, WA broken clouds 46 1
St. Louis, MO clear sky 46 1
Toronto, ON light rain 45 1
Washington, DC moderate rain 51 1
Data last updated: 1732157767
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