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	97	10
Arlington, TX	overcast clouds	108	10
Atlanta, GA	clear sky	90	10
Denver, CO	overcast clouds	93	10
Houston, TX	few clouds	102	10
Las Vegas, NV	clear sky	105	10
Los Angeles, CA	clear sky	97	10
Phoenix, AZ	clear sky	110	10
Sacramento, CA	overcast clouds	91	10
San Diego, CA	scattered clouds	90	10
Williamsport, PA	overcast clouds	71	8
Baltimore, MD	clear sky	84	8
Bronx, NY	clear sky	82	8
Chicago (AL), IL	overcast clouds	75	8
Cincinnati, OH	few clouds	81	8
Detroit, MI	overcast clouds	75	8
Kansas City, MO	light rain	78	8
Milwaukee, WI	clear sky	74	8
Minneapolis, MN	scattered clouds	81	8
Philadelphia, PA	clear sky	82	8
Pittsburgh, PA	broken clouds	76	8
Queens, NY	few clouds	82	8
San Francisco, CA	overcast clouds	76	8
Seattle, WA	overcast clouds	70	8
St. Louis, MO	broken clouds	83	8
Tampa, FL	moderate rain	75	8
Washington, DC	clear sky	84	8
Boston, MA	overcast clouds	71	7
Cleveland, OH	few clouds	73	7
Chicago (NL), IL	overcast clouds	76	5
Tampa Bay, FL	heavy intensity rain	75	5
Miami, FL	light rain	84	4
Toronto, ON	overcast clouds	65	4

Data last updated: 1787518565

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