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	100	10
Las Vegas, NV	clear sky	90	10
Los Angeles, CA	clear sky	100	10
Phoenix, AZ	clear sky	96	10
Sacramento, CA	overcast clouds	92	10
San Diego, CA	clear sky	99	10
Tampa, FL	overcast clouds	89	10
Miami, FL	light rain	89	9
Chicago (AL), IL	few clouds	73	8
Cincinnati, OH	clear sky	75	8
Detroit, MI	scattered clouds	74	8
Milwaukee, WI	clear sky	69	8
San Francisco, CA	scattered clouds	83	8
Toronto, ON	scattered clouds	69	8
Atlanta, GA	light rain	74	7
Chicago (NL), IL	few clouds	73	7
Houston, TX	overcast clouds	77	7
Pittsburgh, PA	clear sky	74	7
St. Louis, MO	clear sky	80	7
Minneapolis, MN	few clouds	67	6
Tampa Bay, FL	overcast clouds	90	6
Williamsport, PA	overcast clouds	58	5
Arlington, TX	broken clouds	74	5
Cleveland, OH	clear sky	71	5
Denver, CO	clear sky	77	5
Seattle, WA	few clouds	66	5
Baltimore, MD	overcast clouds	63	4
Washington, DC	overcast clouds	64	4
Boston, MA	overcast clouds	62	3
Bronx, NY	light rain	58	3
Kansas City, MO	clear sky	77	3
Philadelphia, PA	overcast clouds	61	3
Queens, NY	light rain	58	3

Data last updated: 1791143767

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.