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	90	10
Anaheim, CA	clear sky	93	10
Houston, TX	very heavy rain	94	10
Los Angeles, CA	clear sky	91	10
Phoenix, AZ	few clouds	99	10
Tampa, FL	broken clouds	89	10
Atlanta, GA	broken clouds	85	8
Baltimore, MD	scattered clouds	80	8
Boston, MA	overcast clouds	68	8
Bronx, NY	broken clouds	76	8
Cincinnati, OH	few clouds	78	8
Denver, CO	broken clouds	80	8
Kansas City, MO	clear sky	82	8
Minneapolis, MN	few clouds	77	8
Pittsburgh, PA	scattered clouds	70	8
Queens, NY	broken clouds	76	8
San Diego, CA	few clouds	84	8
San Francisco, CA	few clouds	70	8
Seattle, WA	scattered clouds	72	8
Detroit, MI	broken clouds	67	7
Miami, FL	moderate rain	86	7
St. Louis, MO	clear sky	87	7
Arlington, TX	scattered clouds	83	6
Philadelphia, PA	scattered clouds	77	6
Washington, DC	broken clouds	80	6
Chicago (AL), IL	broken clouds	68	4
Chicago (NL), IL	broken clouds	68	3
Cleveland, OH	broken clouds	65	3
Milwaukee, WI	overcast clouds	63	3
Toronto, ON	broken clouds	65	3

Data last updated: 1756500967

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