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™
Atlanta, GA	broken clouds	88	10
Las Vegas, NV	clear sky	99	10
Los Angeles, CA	clear sky	85	10
Phoenix, AZ	clear sky	106	10
Tampa, FL	few clouds	93	10
Miami, FL	few clouds	90	9
Anaheim, CA	clear sky	84	8
Arlington, TX	clear sky	93	8
Bronx, NY	few clouds	79	8
Detroit, MI	clear sky	77	8
Queens, NY	scattered clouds	79	8
Sacramento, CA	clear sky	79	8
San Diego, CA	clear sky	81	8
San Francisco, CA	broken clouds	66	8
Seattle, WA	overcast clouds	68	8
Toronto, ON	clear sky	76	8
Boston, MA	clear sky	79	7
Milwaukee, WI	clear sky	77	7
Minneapolis, MN	few clouds	77	7
Philadelphia, PA	few clouds	81	7
St. Louis, MO	few clouds	79	7
Cincinnati, OH	clear sky	76	6
Denver, CO	scattered clouds	83	6
Houston, TX	overcast clouds	88	6
Kansas City, MO	overcast clouds	74	6
Pittsburgh, PA	clear sky	74	6
Washington, DC	clear sky	82	6
Baltimore, MD	clear sky	81	5
Chicago (NL), IL	clear sky	76	5
Chicago (AL), IL	clear sky	76	4
Cleveland, OH	clear sky	75	4
Tampa Bay, FL	clear sky	92	4

Data last updated: 1784829367

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