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	86	10
Arlington, TX	clear sky	86	10
Chicago (NL), IL	broken clouds	85	10
Phoenix, AZ	clear sky	102	10
Anaheim, CA	clear sky	76	8
Baltimore, MD	overcast clouds	74	8
Chicago (AL), IL	broken clouds	84	8
Cleveland, OH	clear sky	73	8
Houston, TX	few clouds	84	8
Los Angeles, CA	clear sky	76	8
Philadelphia, PA	overcast clouds	73	8
Seattle, WA	overcast clouds	70	8
St. Louis, MO	clear sky	79	8
Tampa, FL	broken clouds	81	8
Toronto, ON	clear sky	69	8
Milwaukee, WI	clear sky	75	7
San Diego, CA	clear sky	71	7
San Francisco, CA	few clouds	60	7
Washington, DC	overcast clouds	75	7
Boston, MA	overcast clouds	67	6
Detroit, MI	clear sky	77	6
Queens, NY	overcast clouds	65	6
Atlanta, GA	scattered clouds	72	5
Cincinnati, OH	clear sky	75	5
Kansas City, MO	clear sky	69	5
Minneapolis, MN	broken clouds	70	5
Pittsburgh, PA	overcast clouds	72	5
Bronx, NY	overcast clouds	66	4
Miami, FL	scattered clouds	83	4
Denver, CO	overcast clouds	58	3

Data last updated: 1750215366

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