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.

View All Parks

See Results

The Home Run Forecast Index has been featured on

HRF PREMIUM IS NOW AVAILABLE

HRF Premium provides on-demand HRF forecast data using up to date weather information along with our trained model. Check out a preview below or view the pricing page for more information.

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	95	10
Houston, TX	clear sky	91	10
Kansas City, MO	clear sky	85	10
Las Vegas, NV	clear sky	92	10
Los Angeles, CA	clear sky	93	10
Phoenix, AZ	clear sky	100	10
Sacramento, CA	clear sky	95	10
San Diego, CA	scattered clouds	90	10
St. Louis, MO	clear sky	89	10
Arlington, TX	clear sky	87	9
Williamsport, PA	scattered clouds	70	8
Atlanta, GA	clear sky	79	8
Baltimore, MD	clear sky	71	8
Chicago (AL), IL	few clouds	76	8
Cincinnati, OH	clear sky	81	8
Cleveland, OH	clear sky	78	8
Detroit, MI	scattered clouds	77	8
Miami, FL	overcast clouds	84	8
Milwaukee, WI	clear sky	75	8
Minneapolis, MN	few clouds	73	8
Philadelphia, PA	clear sky	69	8
San Francisco, CA	scattered clouds	76	8
Tampa, FL	overcast clouds	79	8
Toronto, ON	few clouds	73	8
Washington, DC	clear sky	72	8
Chicago (NL), IL	few clouds	74	7
Boston, MA	clear sky	65	6
Denver, CO	clear sky	79	6
Pittsburgh, PA	clear sky	74	6
Queens, NY	clear sky	65	6
Bronx, NY	clear sky	66	5
Tampa Bay, FL	overcast clouds	79	5
Seattle, WA	overcast clouds	64	3

Data last updated: 1791406567

API Access

Add Home Run Forecast to Your Site or App

Give your audience a quick way to understand how weather will affect hitting distance. Enhance your game previews, picks and analysis with hourly forecasts up to two days out. When it comes to fantasy baseball or the sportsbook every edge counts.