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™
Arlington, TX	clear sky	91	10
Houston, TX	clear sky	86	10
Las Vegas, NV	broken clouds	94	10
Phoenix, AZ	clear sky	102	10
Sacramento, CA	overcast clouds	89	10
Anaheim, CA	clear sky	81	8
Atlanta, GA	few clouds	83	8
Baltimore, MD	overcast clouds	75	8
Boston, MA	overcast clouds	72	8
Chicago (AL), IL	broken clouds	79	8
Cincinnati, OH	overcast clouds	78	8
Denver, CO	clear sky	74	8
Detroit, MI	scattered clouds	79	8
Los Angeles, CA	scattered clouds	78	8
Milwaukee, WI	clear sky	71	8
Philadelphia, PA	light rain	70	8
Queens, NY	overcast clouds	69	8
San Francisco, CA	overcast clouds	63	8
Tampa, FL	scattered clouds	84	8
Washington, DC	overcast clouds	75	8
Dyersville, IA	clear sky	70	7
Chicago (NL), IL	broken clouds	80	7
Cleveland, OH	overcast clouds	77	7
Pittsburgh, PA	overcast clouds	73	7
Seattle, WA	clear sky	70	6
Toronto, ON	few clouds	72	6
Bronx, NY	overcast clouds	68	5
Minneapolis, MN	scattered clouds	73	5
San Diego, CA	clear sky	75	5
Tampa Bay, FL	broken clouds	85	5
Kansas City, MO	few clouds	78	4
Miami, FL	clear sky	82	4
St. Louis, MO	very heavy rain	77	4

Data last updated: 1786935365

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