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	90	10
Houston, TX	clear sky	94	10
Las Vegas, NV	few clouds	105	10
Los Angeles, CA	clear sky	91	10
Phoenix, AZ	overcast clouds	113	10
Sacramento, CA	clear sky	97	10
San Diego, CA	scattered clouds	85	10
Arlington, TX	overcast clouds	84	8
Baltimore, MD	overcast clouds	77	8
Boston, MA	overcast clouds	72	8
Bronx, NY	broken clouds	74	8
Chicago (AL), IL	clear sky	80	8
Chicago (NL), IL	clear sky	79	8
Cleveland, OH	overcast clouds	74	8
Miami, FL	light rain	84	8
Milwaukee, WI	clear sky	74	8
Philadelphia, PA	overcast clouds	76	8
Queens, NY	broken clouds	74	8
San Francisco, CA	clear sky	71	8
Seattle, WA	clear sky	78	8
Tampa, FL	clear sky	84	8
Toronto, ON	clear sky	69	8
Washington, DC	overcast clouds	78	8
Atlanta, GA	overcast clouds	81	7
Cincinnati, OH	scattered clouds	78	7
Denver, CO	light rain	67	7
Kansas City, MO	scattered clouds	83	7
Minneapolis, MN	clear sky	76	7
St. Louis, MO	scattered clouds	85	7
Detroit, MI	overcast clouds	76	6
Williamsport, PA	overcast clouds	69	5
Pittsburgh, PA	clear sky	70	5
Tampa Bay, FL	clear sky	85	5

Data last updated: 1787792168

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