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™
Phoenix, AZ	few clouds	90	10
Arlington, TX	few clouds	79	8
Atlanta, GA	broken clouds	74	8
Boston, MA	broken clouds	75	8
Bronx, NY	broken clouds	75	8
Chicago (AL), IL	scattered clouds	81	8
Chicago (NL), IL	scattered clouds	78	8
Cincinnati, OH	clear sky	77	8
Detroit, MI	clear sky	78	8
Houston, TX	clear sky	83	8
Kansas City, MO	clear sky	75	8
Milwaukee, WI	clear sky	76	8
Minneapolis, MN	clear sky	76	8
Philadelphia, PA	heavy intensity rain	73	8
Queens, NY	overcast clouds	75	8
St. Louis, MO	clear sky	77	8
Tampa, FL	scattered clouds	83	8
Toronto, ON	clear sky	77	8
Washington, DC	overcast clouds	72	8
Baltimore, MD	broken clouds	72	7
Cleveland, OH	clear sky	77	7
Denver, CO	clear sky	71	7
Pittsburgh, PA	few clouds	75	7
Anaheim, CA	overcast clouds	63	6
Sacramento, CA	clear sky	63	5
Miami, FL	overcast clouds	82	5
Los Angeles, CA	overcast clouds	61	4
San Diego, CA	overcast clouds	63	4
San Francisco, CA	broken clouds	54	4
Seattle, WA	clear sky	56	4

Data last updated: 1751464568

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