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™
Miami, FL	light rain	87	10
Atlanta, GA	clear sky	71	8
Boston, MA	clear sky	65	8
Cincinnati, OH	clear sky	70	8
Houston, TX	clear sky	82	8
Phoenix, AZ	clear sky	83	8
San Diego, CA	clear sky	72	8
Williamsport, PA	few clouds	65	7
Anaheim, CA	clear sky	70	7
Baltimore, MD	clear sky	73	7
Bronx, NY	clear sky	68	7
Los Angeles, CA	clear sky	74	7
Milwaukee, WI	scattered clouds	60	7
Pittsburgh, PA	clear sky	66	7
Tampa, FL	moderate rain	77	7
Arlington, TX	clear sky	74	6
Kansas City, MO	clear sky	70	6
Queens, NY	clear sky	68	6
San Francisco, CA	scattered clouds	59	6
St. Louis, MO	clear sky	73	6
Washington, DC	clear sky	74	6
Detroit, MI	scattered clouds	62	5
Philadelphia, PA	clear sky	70	5
Sacramento, CA	clear sky	65	5
Tampa Bay, FL	heavy intensity rain	77	5
Chicago (AL), IL	scattered clouds	64	4
Chicago (NL), IL	scattered clouds	64	4
Cleveland, OH	scattered clouds	65	4
Denver, CO	clear sky	66	4
Las Vegas, NV	clear sky	72	4
Toronto, ON	few clouds	61	4
Minneapolis, MN	broken clouds	55	3
Seattle, WA	overcast clouds	52	3

Data last updated: 1791471369

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