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 scattered clouds 73 8
Houston, TX scattered clouds 79 8
Kansas City, MO clear sky 65 8
St. Louis, MO clear sky 64 7
Anaheim, CA scattered clouds 60 6
Los Angeles, CA clear sky 58 5
Miami, FL clear sky 75 5
Tampa Bay, FL clear sky 69 5
Atlanta, GA few clouds 61 4
Phoenix, AZ broken clouds 67 4
San Diego, CA broken clouds 62 4
Washington, DC broken clouds 57 4
Baltimore, MD broken clouds 55 3
Cincinnati, OH overcast clouds 53 3
Denver, CO broken clouds 61 3
Oakland, CA scattered clouds 53 3
Philadelphia, PA broken clouds 54 3
Queens, NY broken clouds 52 3
San Francisco, CA scattered clouds 53 3
Bronx, NY few clouds 51 2
Williamsport, PA overcast clouds 45 1
Boston, MA scattered clouds 49 1
Chicago (AL), IL overcast clouds 47 1
Chicago (NL), IL broken clouds 47 1
Cleveland, OH overcast clouds 41 1
Detroit, MI overcast clouds 44 1
Milwaukee, WI broken clouds 44 1
Minneapolis, MN scattered clouds 41 1
Pittsburgh, PA overcast clouds 43 1
Seattle, WA light rain 44 1
Toronto, ON overcast clouds 45 1
Data last updated: 1732470967
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