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	100	10
Arlington, TX	scattered clouds	90	10
Atlanta, GA	scattered clouds	89	10
Chicago (AL), IL	few clouds	85	10
Houston, TX	broken clouds	88	10
Kansas City, MO	clear sky	89	10
Minneapolis, MN	scattered clouds	88	10
Phoenix, AZ	few clouds	106	10
St. Louis, MO	overcast clouds	85	10
Anaheim, CA	clear sky	78	8
Boston, MA	broken clouds	78	8
Bronx, NY	heavy intensity rain	74	8
Cincinnati, OH	scattered clouds	85	8
Denver, CO	broken clouds	85	8
Detroit, MI	clear sky	84	8
Los Angeles, CA	clear sky	77	8
Milwaukee, WI	few clouds	83	8
Philadelphia, PA	moderate rain	78	8
Pittsburgh, PA	few clouds	80	8
Queens, NY	moderate rain	75	8
San Francisco, CA	few clouds	65	8
Toronto, ON	few clouds	81	8
Chicago (NL), IL	few clouds	84	7
Cleveland, OH	clear sky	81	7
San Diego, CA	broken clouds	73	7
Washington, DC	light rain	76	7
Seattle, WA	overcast clouds	76	6
Baltimore, MD	overcast clouds	74	5
Miami, FL	overcast clouds	74	3
Tampa, FL	heavy intensity rain	74	3

Data last updated: 1752537368

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