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™
Sacramento, CA	clear sky	86	10
Anaheim, CA	clear sky	86	10
Arlington, TX	clear sky	92	10
Atlanta, GA	broken clouds	87	10
Chicago (AL), IL	scattered clouds	92	10
Chicago (NL), IL	scattered clouds	91	10
Detroit, MI	few clouds	85	10
Houston, TX	broken clouds	92	10
Los Angeles, CA	clear sky	86	10
Milwaukee, WI	broken clouds	90	10
Phoenix, AZ	clear sky	106	10
St. Louis, MO	few clouds	88	10
Tampa, FL	broken clouds	92	10
Baltimore, MD	overcast clouds	75	8
Cleveland, OH	heavy intensity rain	73	8
Kansas City, MO	broken clouds	77	8
Minneapolis, MN	broken clouds	79	8
Philadelphia, PA	overcast clouds	77	8
Pittsburgh, PA	moderate rain	78	8
Queens, NY	overcast clouds	66	8
San Diego, CA	clear sky	81	8
San Francisco, CA	clear sky	66	8
Seattle, WA	clear sky	72	8
Toronto, ON	broken clouds	78	8
Washington, DC	overcast clouds	78	8
Boston, MA	overcast clouds	71	7
Cincinnati, OH	moderate rain	75	7
Miami, FL	broken clouds	89	7
Bronx, NY	overcast clouds	66	6
Denver, CO	overcast clouds	69	3

Data last updated: 1750190168

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