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™
Baltimore, MD broken clouds 78 8
Boston, MA scattered clouds 69 8
Bronx, NY clear sky 72 8
Houston, TX scattered clouds 83 8
Washington, DC broken clouds 79 8
Atlanta, GA overcast clouds 72 6
Philadelphia, PA broken clouds 76 5
Williamsport, PA broken clouds 66 4
Oakland, CA clear sky 60 4
Queens, NY clear sky 72 4
San Diego, CA clear sky 65 4
Tampa Bay, FL overcast clouds 83 4
Anaheim, CA clear sky 68 3
Arlington, TX overcast clouds 65 3
Cincinnati, OH overcast clouds 58 3
Los Angeles, CA clear sky 65 3
Miami, FL broken clouds 85 3
Phoenix, AZ few clouds 58 3
Pittsburgh, PA few clouds 62 3
San Francisco, CA clear sky 60 3
Toronto, ON clear sky 54 3
Cleveland, OH broken clouds 55 2
St. Louis, MO few clouds 56 2
Chicago (AL), IL scattered clouds 53 1
Chicago (NL), IL scattered clouds 53 1
Denver, CO snow 30 1
Detroit, MI clear sky 55 1
Kansas City, MO overcast clouds 49 1
Milwaukee, WI few clouds 52 1
Minneapolis, MN broken clouds 43 1
Seattle, WA few clouds 45 1
Data last updated: 1730998569
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