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™
Phoenix, AZ	broken clouds	91	10
Baltimore, MD	broken clouds	84	8
Boston, MA	overcast clouds	75	8
Bronx, NY	scattered clouds	77	8
Chicago (AL), IL	few clouds	75	8
Cincinnati, OH	light rain	72	8
Cleveland, OH	clear sky	74	8
Detroit, MI	broken clouds	75	8
Houston, TX	clear sky	77	8
Kansas City, MO	clear sky	69	8
Milwaukee, WI	clear sky	71	8
Minneapolis, MN	clear sky	68	8
Philadelphia, PA	broken clouds	80	8
Pittsburgh, PA	overcast clouds	75	8
Queens, NY	overcast clouds	76	8
Tampa, FL	clear sky	79	8
Washington, DC	broken clouds	82	8
Arlington, TX	few clouds	75	7
Atlanta, GA	overcast clouds	73	7
St. Louis, MO	clear sky	72	7
Toronto, ON	broken clouds	73	7
Sacramento, CA	clear sky	62	5
Anaheim, CA	clear sky	61	5
Chicago (NL), IL	clear sky	73	5
Denver, CO	clear sky	64	4
Los Angeles, CA	clear sky	61	4
Miami, FL	broken clouds	81	4
San Diego, CA	overcast clouds	64	4
San Francisco, CA	broken clouds	54	4
Seattle, WA	broken clouds	59	4

Data last updated: 1751374567

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