Do certain weather conditions lead to more home runs?

Yes! Weather conditions change the distance a batted ball travels by more than 20%. Home Run Forecast provides a simple indication of how weather will help or hinder baseball flight during a game. The HRFI demonstrates a strong correlation with HRs hit and runs scored in big league games. Check out our Premium Subscription for on-demand forecast data by team and 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	clear sky	87	10
Phoenix, AZ	few clouds	93	9
Chicago (NL), IL	overcast clouds	72	8
Cleveland, OH	clear sky	70	8
Houston, TX	clear sky	83	8
Kansas City, MO	clear sky	82	8
Los Angeles, CA	clear sky	81	8
Miami, FL	overcast clouds	80	8
Minneapolis, MN	broken clouds	71	8
Oakland, CA	few clouds	70	8
St. Louis, MO	clear sky	79	8
Philadelphia, PA	clear sky	72	7
Queens, NY	clear sky	70	7
San Diego, CA	few clouds	78	7
San Francisco, CA	few clouds	65	7
Toronto, ON	clear sky	68	7
Washington, DC	clear sky	70	6
Bronx, NY	clear sky	71	5
Pittsburgh, PA	few clouds	70	5
Williamsport, PA	clear sky	64	4
Atlanta, GA	clear sky	71	4
Chicago (AL), IL	broken clouds	71	4
Cincinnati, OH	scattered clouds	71	4
Denver, CO	scattered clouds	74	4
Milwaukee, WI	scattered clouds	68	4
Tampa Bay, FL	clear sky	82	4
Baltimore, MD	clear sky	71	3
Detroit, MI	clear sky	68	3
Boston, MA	clear sky	60	2
Seattle, WA	scattered clouds	57	1

Data last updated: 1729637769

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