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 clear sky 64 8
Anaheim, CA clear sky 60 4
Oakland, CA broken clouds 62 4
Tampa Bay, FL clear sky 62 4
Los Angeles, CA clear sky 61 3
Phoenix, AZ clear sky 65 3
San Diego, CA scattered clouds 58 3
San Francisco, CA broken clouds 61 3
Boston, MA light rain 47 2
Bronx, NY moderate rain 39 2
Queens, NY moderate rain 41 2
Williamsport, PA light rain 38 1
Arlington, TX clear sky 56 1
Atlanta, GA clear sky 45 1
Baltimore, MD broken clouds 42 1
Chicago (AL), IL overcast clouds 38 1
Chicago (NL), IL overcast clouds 38 1
Cincinnati, OH light snow 33 1
Cleveland, OH moderate rain 32 1
Denver, CO scattered clouds 43 1
Detroit, MI overcast clouds 35 1
Houston, TX clear sky 59 1
Kansas City, MO clear sky 38 1
Milwaukee, WI overcast clouds 39 1
Minneapolis, MN overcast clouds 37 1
Philadelphia, PA overcast clouds 42 1
Pittsburgh, PA light snow 33 1
Seattle, WA overcast clouds 46 1
St. Louis, MO overcast clouds 41 1
Toronto, ON overcast clouds 41 1
Washington, DC clear sky 41 1
Data last updated: 1732244166
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