Marathons by Month Marathons by Inception Year Marathons by Temperature
(Adjust the slider to choose a month)
(Adjust the slider to choose a year)
US marathons by temperature during month of race

Average daily high during marathon month (°F)

List of marathons from Wikipedia, accessed April 2020. Geocoding performed with geopy. Weather data and averages from World Weather Online and Weather Underground.

*Please note that I do not expect this set of marathons to be complete. If your favorite marathon is missing, let me know and I can about it add it to the plots!

If you'd like to see a temperature history of race day for a particular marathon (click on Boston or New York in the temperature tab for examples), feel free to send me a list of the race dates for the past few years, and I can add in the corresponding temperature data.

Here is a blog post describing the making of these plots.