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™
Los Angeles, CA	clear sky	90	10
San Diego, CA	few clouds	88	9
Anaheim, CA	clear sky	84	8
Atlanta, GA	few clouds	72	8
Houston, TX	broken clouds	80	8
Phoenix, AZ	broken clouds	94	7
San Francisco, CA	few clouds	60	7
Boston, MA	overcast clouds	60	5
Miami, FL	broken clouds	85	5
Oakland, CA	few clouds	66	5
Tampa Bay, FL	overcast clouds	83	5
Baltimore, MD	few clouds	60	4
Bronx, NY	clear sky	60	4
Chicago (AL), IL	few clouds	56	4
Seattle, WA	broken clouds	71	4
Williamsport, PA	clear sky	55	3
Arlington, TX	clear sky	78	3
Chicago (NL), IL	few clouds	56	3
Cincinnati, OH	clear sky	55	3
Cleveland, OH	few clouds	52	3
Denver, CO	scattered clouds	73	3
Detroit, MI	clear sky	51	3
Kansas City, MO	clear sky	63	3
Milwaukee, WI	clear sky	51	3
Minneapolis, MN	clear sky	58	3
Philadelphia, PA	few clouds	58	3
Pittsburgh, PA	broken clouds	55	3
Queens, NY	broken clouds	62	3
St. Louis, MO	clear sky	62	3
Toronto, ON	few clouds	51	3
Washington, DC	clear sky	61	3

Data last updated: 1725764165

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