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™
Anaheim, CA	clear sky	101	10
Las Vegas, NV	clear sky	92	10
Los Angeles, CA	clear sky	99	10
Phoenix, AZ	clear sky	97	10
Sacramento, CA	overcast clouds	94	10
San Diego, CA	clear sky	99	10
Tampa, FL	overcast clouds	88	10
Miami, FL	scattered clouds	89	9
Chicago (AL), IL	clear sky	73	8
Cincinnati, OH	clear sky	76	8
Detroit, MI	few clouds	74	8
Milwaukee, WI	clear sky	69	8
San Francisco, CA	scattered clouds	81	8
Toronto, ON	few clouds	69	8
Atlanta, GA	light rain	72	7
Denver, CO	clear sky	79	7
Pittsburgh, PA	clear sky	73	7
Seattle, WA	scattered clouds	69	7
St. Louis, MO	clear sky	81	7
Arlington, TX	overcast clouds	75	6
Chicago (NL), IL	clear sky	73	6
Houston, TX	broken clouds	78	6
Minneapolis, MN	scattered clouds	68	6
Cleveland, OH	clear sky	71	5
Tampa Bay, FL	overcast clouds	89	5
Williamsport, PA	overcast clouds	59	4
Baltimore, MD	overcast clouds	63	4
Washington, DC	overcast clouds	65	4
Boston, MA	overcast clouds	61	3
Bronx, NY	light rain	57	3
Philadelphia, PA	overcast clouds	60	3
Queens, NY	light rain	57	3
Kansas City, MO	clear sky	78	2

Data last updated: 1791147367

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