Do certain weather conditions lead to more home runs?

Yes! Weather conditions change the distance a batted ball travels by more than 20%. Home Run Forecast provides a simple indication of how weather will help or hinder baseball flight during a game. The HRFI demonstrates a strong correlation with HRs hit and runs scored in big league games. Check out our Premium Subscription for on-demand forecast data by team and game.

The Home Run Forecast Index has been featured on


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.

Premium Preview

HRF forecast value available for each contest, with detailed data throughout the game.

Premium Hourly Preview

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™
Phoenix, AZ scattered clouds 95 10
Miami, FL scattered clouds 83 8
San Francisco, CA few clouds 59 8
West Palm Beach, FL broken clouds 79 8
Jupiter, FL broken clouds 78 7
Anaheim, CA clear sky 64 7
Arlington, TX few clouds 74 7
Atlanta, GA clear sky 71 7
Boston, MA clear sky 68 7
Bronx, NY clear sky 67 7
Oakland, CA few clouds 60 6
Baltimore, MD broken clouds 69 5
Chicago (AL), IL few clouds 57 5
Cincinnati, OH broken clouds 64 5
Houston, TX broken clouds 73 5
Los Angeles, CA clear sky 62 5
Williamsport, PA clear sky 59 5
Detroit, MI overcast clouds 59 4
Milwaukee, WI light rain 54 4
Philadelphia, PA broken clouds 68 4
Queens, NY few clouds 68 4
San Diego, CA broken clouds 62 4
St. Louis, MO clear sky 66 4
Tampa Bay, FL clear sky 82 4
Toronto, ON overcast clouds 60 4
Washington, DC broken clouds 64 4
Chicago (NL), IL light rain 57 3
Cleveland, OH broken clouds 60 3
Denver, CO broken clouds 65 3
Dyersville, IA clear sky 55 3
Kansas City, MO broken clouds 72 3
Minneapolis, MN clear sky 57 3
Pittsburgh, PA overcast clouds 59 3
Seattle, WA broken clouds 54 3
Mexico City, México few clouds 77 2
Data last updated: 1716951366
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.