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™
Houston, TX broken clouds 66 7
Tampa Bay, FL clear sky 59 6
Arlington, TX clear sky 66 5
Miami, FL clear sky 61 4
Oakland, CA broken clouds 55 4
Phoenix, AZ overcast clouds 70 4
San Francisco, CA broken clouds 55 4
Anaheim, CA overcast clouds 58 3
Denver, CO clear sky 55 3
Kansas City, MO clear sky 52 3
Los Angeles, CA overcast clouds 58 3
San Diego, CA scattered clouds 60 3
Washington, DC broken clouds 51 3
Boston, MA scattered clouds 45 2
Williamsport, PA overcast clouds 47 1
Atlanta, GA clear sky 47 1
Baltimore, MD broken clouds 51 1
Bronx, NY clear sky 46 1
Chicago (AL), IL overcast clouds 40 1
Chicago (NL), IL overcast clouds 41 1
Cincinnati, OH overcast clouds 41 1
Cleveland, OH overcast clouds 44 1
Detroit, MI overcast clouds 45 1
Milwaukee, WI scattered clouds 41 1
Minneapolis, MN broken clouds 38 1
Philadelphia, PA broken clouds 48 1
Pittsburgh, PA overcast clouds 44 1
Queens, NY few clouds 47 1
Seattle, WA overcast clouds 48 1
St. Louis, MO clear sky 45 1
Toronto, ON broken clouds 43 1
Data last updated: 1732409768
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