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	87	10
Arlington, TX	clear sky	103	10
Atlanta, GA	scattered clouds	94	10
Chicago (NL), IL	broken clouds	85	10
Cincinnati, OH	broken clouds	88	10
Houston, TX	clear sky	98	10
Las Vegas, NV	few clouds	97	10
Phoenix, AZ	overcast clouds	109	10
Sacramento, CA	broken clouds	92	10
St. Louis, MO	overcast clouds	93	10
Tampa, FL	broken clouds	91	10
Dyersville, IA	broken clouds	77	8
Baltimore, MD	overcast clouds	76	8
Boston, MA	overcast clouds	78	8
Bronx, NY	overcast clouds	74	8
Chicago (AL), IL	broken clouds	84	8
Cleveland, OH	overcast clouds	80	8
Denver, CO	scattered clouds	81	8
Detroit, MI	overcast clouds	85	8
Kansas City, MO	overcast clouds	85	8
Los Angeles, CA	clear sky	84	8
Miami, FL	few clouds	88	8
Milwaukee, WI	broken clouds	83	8
Minneapolis, MN	clear sky	81	8
Philadelphia, PA	moderate rain	71	8
Pittsburgh, PA	moderate rain	73	8
Queens, NY	overcast clouds	76	8
San Francisco, CA	broken clouds	69	8
Toronto, ON	overcast clouds	79	8
Washington, DC	broken clouds	80	8
San Diego, CA	few clouds	80	7
Seattle, WA	broken clouds	75	6
Tampa Bay, FL	broken clouds	91	4

Data last updated: 1786920965

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