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
Houston, TX	overcast clouds	88	10
Las Vegas, NV	clear sky	90	10
Phoenix, AZ	clear sky	94	10
Sacramento, CA	clear sky	95	10
St. Louis, MO	overcast clouds	85	10
Arlington, TX	overcast clouds	75	8
Baltimore, MD	few clouds	77	8
Boston, MA	overcast clouds	71	8
Cincinnati, OH	overcast clouds	84	8
Cleveland, OH	broken clouds	81	8
Detroit, MI	overcast clouds	77	8
Los Angeles, CA	clear sky	84	8
Philadelphia, PA	few clouds	77	8
Pittsburgh, PA	broken clouds	77	8
Queens, NY	broken clouds	72	8
San Diego, CA	clear sky	81	8
San Francisco, CA	broken clouds	70	8
Toronto, ON	overcast clouds	71	8
Washington, DC	clear sky	80	8
Williamsport, PA	broken clouds	73	7
Atlanta, GA	few clouds	82	7
Bronx, NY	broken clouds	73	7
Chicago (AL), IL	heavy intensity rain	64	7
Denver, CO	clear sky	71	7
Miami, FL	heavy intensity rain	78	7
Milwaukee, WI	moderate rain	63	6
Minneapolis, MN	overcast clouds	65	6
Tampa, FL	overcast clouds	83	6
Seattle, WA	overcast clouds	67	5
Tampa Bay, FL	overcast clouds	83	4
Chicago (NL), IL	moderate rain	63	3
Kansas City, MO	moderate rain	69	3

Data last updated: 1790895367

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