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™
Sacramento, CA	clear sky	97	10
Arlington, TX	clear sky	89	10
Houston, TX	broken clouds	86	10
Kansas City, MO	clear sky	86	10
Phoenix, AZ	clear sky	106	10
Anaheim, CA	clear sky	74	8
Chicago (NL), IL	overcast clouds	84	8
Cleveland, OH	scattered clouds	76	8
Los Angeles, CA	clear sky	78	8
Minneapolis, MN	overcast clouds	84	8
San Francisco, CA	few clouds	64	8
St. Louis, MO	clear sky	85	8
Toronto, ON	clear sky	76	8
Cincinnati, OH	scattered clouds	79	7
Tampa, FL	broken clouds	76	7
Baltimore, MD	few clouds	70	6
Chicago (AL), IL	overcast clouds	84	6
Milwaukee, WI	clear sky	81	6
San Diego, CA	broken clouds	68	6
Atlanta, GA	broken clouds	74	5
Boston, MA	few clouds	66	5
Seattle, WA	overcast clouds	70	5
Bristol, TN	broken clouds	68	4
Detroit, MI	clear sky	77	4
Miami, FL	broken clouds	82	4
Philadelphia, PA	few clouds	67	4
Pittsburgh, PA	clear sky	71	4
Queens, NY	few clouds	70	4
Washington, DC	few clouds	69	4
Denver, CO	broken clouds	77	3
Bronx, NY	clear sky	70	2

Data last updated: 1754708167

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