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™
Phoenix, AZ	clear sky	104	10
Anaheim, CA	clear sky	76	8
Arlington, TX	clear sky	79	8
Birmingham, AL	broken clouds	78	8
Houston, TX	broken clouds	77	8
Los Angeles, CA	clear sky	79	8
Oakland, CA	broken clouds	59	8
San Francisco, CA	broken clouds	59	8
Atlanta, GA	scattered clouds	76	7
Denver, CO	broken clouds	73	7
Bronx, NY	overcast clouds	74	6
Chicago (NL), IL	clear sky	71	6
Cincinnati, OH	clear sky	70	6
Detroit, MI	clear sky	69	6
Kansas City, MO	few clouds	80	6
Minneapolis, MN	broken clouds	79	6
Philadelphia, PA	overcast clouds	73	6
Queens, NY	overcast clouds	75	6
San Diego, CA	few clouds	72	6
Baltimore, MD	broken clouds	72	5
Boston, MA	clear sky	69	5
Miami, FL	few clouds	84	5
Pittsburgh, PA	clear sky	68	5
St. Louis, MO	few clouds	78	5
Washington, DC	clear sky	71	5
Chicago (AL), IL	clear sky	72	4
Cleveland, OH	clear sky	65	4
Milwaukee, WI	clear sky	65	4
Seattle, WA	few clouds	71	4
Tampa Bay, FL	scattered clouds	82	4
London, England	overcast clouds	57	3
Toronto, ON	clear sky	70	3

Data last updated: 1722048966

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