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	88	10
Phoenix, AZ	broken clouds	93	10
Anaheim, CA	clear sky	68	8
Atlanta, GA	clear sky	77	8
Baltimore, MD	clear sky	76	8
Boston, MA	clear sky	73	8
Bronx, NY	clear sky	75	8
Chicago (AL), IL	broken clouds	81	8
Chicago (NL), IL	few clouds	80	8
Cleveland, OH	broken clouds	74	8
Denver, CO	clear sky	83	8
Houston, TX	clear sky	84	8
Kansas City, MO	clear sky	77	8
Los Angeles, CA	clear sky	68	8
Miami, FL	overcast clouds	80	8
Philadelphia, PA	broken clouds	75	8
Queens, NY	scattered clouds	75	8
Tampa, FL	clear sky	80	8
Washington, DC	clear sky	77	8
Detroit, MI	scattered clouds	79	7
Milwaukee, WI	scattered clouds	71	7
Minneapolis, MN	clear sky	78	7
San Francisco, CA	broken clouds	57	7
Toronto, ON	few clouds	74	7
Arlington, TX	clear sky	84	6
Cincinnati, OH	clear sky	73	6
Pittsburgh, PA	scattered clouds	72	6
St. Louis, MO	overcast clouds	80	6
San Diego, CA	broken clouds	65	4
Seattle, WA	broken clouds	68	4

Data last updated: 1751511366

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