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™
Houston, TX	scattered clouds	90	10
Las Vegas, NV	clear sky	104	10
Phoenix, AZ	clear sky	109	10
Sacramento, CA	clear sky	88	10
Anaheim, CA	clear sky	81	8
Baltimore, MD	overcast clouds	80	8
Boston, MA	overcast clouds	76	8
Bronx, NY	overcast clouds	77	8
Denver, CO	scattered clouds	83	8
Detroit, MI	light rain	72	8
Los Angeles, CA	clear sky	80	8
Miami, FL	overcast clouds	79	8
Philadelphia, PA	overcast clouds	78	8
Queens, NY	overcast clouds	77	8
Washington, DC	overcast clouds	80	8
Arlington, TX	clear sky	88	7
Cleveland, OH	overcast clouds	73	7
San Francisco, CA	clear sky	65	7
St. Louis, MO	overcast clouds	69	7
Tampa, FL	overcast clouds	79	7
Atlanta, GA	overcast clouds	80	6
Milwaukee, WI	overcast clouds	68	6
Pittsburgh, PA	broken clouds	74	6
Chicago (AL), IL	overcast clouds	70	5
Cincinnati, OH	scattered clouds	71	5
San Diego, CA	clear sky	75	5
Toronto, ON	overcast clouds	77	5
Kansas City, MO	clear sky	74	4
Minneapolis, MN	clear sky	74	4
Tampa Bay, FL	overcast clouds	80	4
Chicago (NL), IL	overcast clouds	70	3
Seattle, WA	broken clouds	65	3

Data last updated: 1785639366

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