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	98	10
Arlington, TX	clear sky	87	10
Houston, TX	clear sky	90	10
Las Vegas, NV	clear sky	90	10
Los Angeles, CA	clear sky	97	10
Miami, FL	light rain	88	10
Phoenix, AZ	clear sky	97	10
Sacramento, CA	clear sky	95	10
San Diego, CA	clear sky	98	10
Chicago (NL), IL	clear sky	74	8
Denver, CO	few clouds	87	8
Kansas City, MO	clear sky	82	8
Minneapolis, MN	clear sky	81	8
San Francisco, CA	scattered clouds	76	8
St. Louis, MO	clear sky	79	8
Tampa, FL	moderate rain	77	8
Cleveland, OH	clear sky	65	7
Atlanta, GA	clear sky	78	6
Chicago (AL), IL	clear sky	74	5
Milwaukee, WI	few clouds	73	5
Tampa Bay, FL	heavy intensity rain	76	5
Williamsport, PA	clear sky	61	4
Baltimore, MD	clear sky	65	4
Boston, MA	clear sky	61	4
Bronx, NY	clear sky	62	4
Cincinnati, OH	clear sky	72	4
Pittsburgh, PA	clear sky	64	4
Seattle, WA	overcast clouds	65	4
Toronto, ON	scattered clouds	58	4
Washington, DC	clear sky	66	4
Detroit, MI	clear sky	67	3
Philadelphia, PA	clear sky	64	3
Queens, NY	clear sky	62	3

Data last updated: 1791320168

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