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	clear sky	90	10
Baltimore, MD	few clouds	89	10
Boston, MA	clear sky	90	10
Bronx, NY	clear sky	90	10
Houston, TX	few clouds	90	10
Las Vegas, NV	few clouds	90	10
Philadelphia, PA	clear sky	90	10
Phoenix, AZ	few clouds	97	10
Queens, NY	clear sky	90	10
Washington, DC	few clouds	88	10
Anaheim, CA	scattered clouds	75	8
Chicago (NL), IL	clear sky	81	8
Cincinnati, OH	overcast clouds	83	8
Cleveland, OH	overcast clouds	77	8
Detroit, MI	overcast clouds	80	8
Kansas City, MO	overcast clouds	81	8
Los Angeles, CA	broken clouds	76	8
Milwaukee, WI	clear sky	81	8
Minneapolis, MN	broken clouds	70	8
Pittsburgh, PA	broken clouds	78	8
St. Louis, MO	few clouds	85	8
Toronto, ON	overcast clouds	73	8
Chicago (AL), IL	few clouds	81	7
Miami, FL	light rain	91	7
Sacramento, CA	clear sky	72	7
San Diego, CA	clear sky	78	7
Seattle, WA	clear sky	68	7
Tampa, FL	clear sky	87	7
Atlanta, GA	few clouds	80	6
Denver, CO	clear sky	81	6
San Francisco, CA	scattered clouds	58	5
Tampa Bay, FL	clear sky	86	5

Data last updated: 1786118166

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