Do certain weather conditions lead to more home runs?

Yes! Weather conditions can change the distance a batted ball travels by more than 20%. Home Run Forecast provides a simple way to see the if weather will help or hinder baseball flight during a game. The Home Run Forecast Index demonstrates a strong correlation with the number of HRs hit and runs scored in big league games. Check out our Premium Subscription for on-demand HRFI forecast data by team and for each game.

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HRF forecast value available for each contest, with detailed data throughout the game.

Detailed weather data and hourly index data for each park.

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	broken clouds	89	10
Denver, CO	clear sky	91	10
Houston, TX	scattered clouds	91	10
Kansas City, MO	clear sky	89	10
Phoenix, AZ	clear sky	99	10
St. Louis, MO	clear sky	88	10
Tampa, FL	broken clouds	86	10
Anaheim, CA	overcast clouds	68	8
Atlanta, GA	scattered clouds	84	8
Baltimore, MD	few clouds	83	8
Boston, MA	scattered clouds	80	8
Bronx, NY	few clouds	80	8
Chicago (AL), IL	overcast clouds	77	8
Chicago (NL), IL	overcast clouds	76	8
Cincinnati, OH	scattered clouds	84	8
Cleveland, OH	scattered clouds	81	8
Detroit, MI	broken clouds	79	8
Los Angeles, CA	overcast clouds	66	8
Milwaukee, WI	overcast clouds	76	8
Minneapolis, MN	broken clouds	79	8
Philadelphia, PA	scattered clouds	80	8
Pittsburgh, PA	few clouds	79	8
Queens, NY	few clouds	81	8
San Diego, CA	overcast clouds	68	8
San Francisco, CA	scattered clouds	59	8
Toronto, ON	scattered clouds	72	8
Washington, DC	few clouds	83	8
Miami, FL	broken clouds	89	7
Sacramento, CA	clear sky	63	6
Seattle, WA	overcast clouds	55	4

Data last updated: 1750438565

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