In its fifth year, this was the first New York City Marathon to see rain as thundershowers produced 0.32" of rain between 3-4 PM and 0.10" between 5-6 PM (but well after the leading runners had crossed the finish line). It was also a warm day, with a start-time temperature of 74°.
The morning low was a summer-like 71°, fifteen degrees above average. This was the latest date for a low in the 70s since 1959 (when it occurred on 10/1), and would be the latest date until 2005, when that year's last 70-degree low temperature fell on 10/7 (and then 2010's occurred on 9/28; 2015's on 9/29; 2017 had 70-degree lows on 10/8 and 10/9; and in 2018 it was on 10/10.) The average date for the occurrence is Sept. 11.
The 0.18" of rain the fell between 2-5 AM was the first rain on this date in seventeen years.
The morning low of 43° was the chilliest reading in September since 1974 (when it occurred on 9/24).