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	broken clouds	88	10
Arlington, TX	clear sky	100	10
Atlanta, GA	scattered clouds	90	10
Chicago (AL), IL	broken clouds	90	10
Chicago (NL), IL	broken clouds	89	10
Houston, TX	broken clouds	94	10
Kansas City, MO	clear sky	99	10
Las Vegas, NV	broken clouds	106	10
Los Angeles, CA	overcast clouds	88	10
Miami, FL	overcast clouds	86	10
Milwaukee, WI	broken clouds	87	10
Minneapolis, MN	overcast clouds	99	10
Phoenix, AZ	clear sky	109	10
Sacramento, CA	clear sky	95	10
St. Louis, MO	clear sky	100	10
Tampa, FL	scattered clouds	92	10
Baltimore, MD	overcast clouds	83	8
Bronx, NY	overcast clouds	81	8
Cincinnati, OH	scattered clouds	83	8
Cleveland, OH	few clouds	82	8
Detroit, MI	overcast clouds	85	8
Philadelphia, PA	broken clouds	84	8
Pittsburgh, PA	broken clouds	79	8
Queens, NY	broken clouds	80	8
San Diego, CA	broken clouds	85	8
San Francisco, CA	clear sky	69	8
Seattle, WA	overcast clouds	72	8
Toronto, ON	broken clouds	80	8
Washington, DC	overcast clouds	83	8
Denver, CO	overcast clouds	97	7
Boston, MA	few clouds	74	4
Tampa Bay, FL	broken clouds	91	4

Data last updated: 1785103026

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