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™
Anaheim, CA	clear sky	86	10
Arlington, TX	overcast clouds	96	10
Houston, TX	overcast clouds	87	10
Kansas City, MO	clear sky	89	10
Las Vegas, NV	overcast clouds	101	10
Los Angeles, CA	clear sky	87	10
Phoenix, AZ	clear sky	110	10
Sacramento, CA	clear sky	101	10
St. Louis, MO	clear sky	88	10
Denver, CO	few clouds	89	9
Boston, MA	clear sky	79	8
Bronx, NY	clear sky	84	8
Cincinnati, OH	clear sky	83	8
Cleveland, OH	overcast clouds	76	8
Milwaukee, WI	broken clouds	73	8
Philadelphia, PA	clear sky	82	8
San Diego, CA	scattered clouds	82	8
San Francisco, CA	few clouds	64	8
Toronto, ON	scattered clouds	77	8
Washington, DC	clear sky	83	8
Atlanta, GA	overcast clouds	78	7
Baltimore, MD	clear sky	81	7
Chicago (NL), IL	clear sky	74	7
Detroit, MI	heavy intensity rain	76	7
Pittsburgh, PA	clear sky	76	7
Tampa, FL	broken clouds	81	7
Miami, FL	light rain	85	6
Minneapolis, MN	clear sky	80	6
Queens, NY	clear sky	85	5
Tampa Bay, FL	few clouds	83	5
Chicago (AL), IL	clear sky	75	4
Seattle, WA	overcast clouds	74	4

Data last updated: 1786323367

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