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™
Houston, TX	clear sky	87	10
Phoenix, AZ	overcast clouds	92	10
Sacramento, CA	clear sky	75	8
Anaheim, CA	clear sky	72	7
Arlington, TX	few clouds	88	7
Atlanta, GA	overcast clouds	76	7
Los Angeles, CA	clear sky	69	7
Miami, FL	light rain	78	7
Denver, CO	broken clouds	66	5
Las Vegas, NV	clear sky	81	5
Tampa, FL	scattered clouds	78	5
Cincinnati, OH	overcast clouds	62	4
San Diego, CA	few clouds	71	4
Seattle, WA	broken clouds	61	4
Tampa Bay, FL	scattered clouds	81	4
Cleveland, OH	overcast clouds	60	3
San Francisco, CA	clear sky	58	3
St. Louis, MO	few clouds	66	3
Williamsport, PA	overcast clouds	56	2
Baltimore, MD	moderate rain	60	2
Boston, MA	broken clouds	52	2
Detroit, MI	overcast clouds	59	2
Kansas City, MO	clear sky	63	2
Milwaukee, WI	clear sky	54	2
Minneapolis, MN	clear sky	55	2
Philadelphia, PA	overcast clouds	62	2
Pittsburgh, PA	overcast clouds	58	2
Washington, DC	moderate rain	59	2
Bronx, NY	overcast clouds	61	1
Chicago (AL), IL	overcast clouds	63	1
Chicago (NL), IL	broken clouds	63	1
Queens, NY	overcast clouds	61	1
Toronto, ON	clear sky	57	1

Data last updated: 1790132166

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