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November 2019

A Reading in the 90s Makes October 2019 Memorable in New York

Oct 26 - mums abingdon sq park


Although above average rainfall characterized October 2019, a day of sizzling heat at the beginning of the month is likely what many New Yorkers will remember.  After having no days in the 90s in September, the high on 10/2 was a torrid 93°, 24 degrees above average - and the first 90-degree reading in October since 1941.  (The high the next day, however, was thirty degrees chillier.)  As for the rain, 6.15" was measured, the most in October since 2006, and the second rainiest month of the year (May had 6.77").  A little more than half of the month's rain fell on two days: on 10/16, when 1.83" fell, and 10/27 (1.38").


The month was three degrees warmer than average and was the 24th mildest October on record (but it ranked 12th for average low).  And although it had just a few days with highs of 70° or warmer or lows in the 60s, the month also had very few days with highs in the 50s or lows in the 40s (the chilliest reading was 43° on the 19th).  Similar to September, October ended with 11 days in a row with above average readings (averaging six degrees above average).  Temperatures between 10/3-20 were average while the other 13 days of the month were seven degrees above average.


In the years since 1900 three out of four Octobers have had their chilliest readings in the 30s or 20s.  October 2019 joined only five other Octobers whose chilliest lows were 43° or milder.  (The mildest reading to be the chilliest October low is 45°, which happened in 1945 and again in 1971.)  The typical chilliest October temperature is around 38° (fourteen Octobers since 1900 had chilliest readings of 32° or colder; the last time it occurred was in 1988).


Chilly willy


The low on Halloween was 60°, 15 degrees above average.  It joined 10/1 and 10/2 as the only days in October with lows in the 60s.  The high of 71° on 10/31 was the warmest reading on the holiday in ten years, when the high was also 71°.  It was also the mildest reading since 10/14.  (And although 10/31's high of 71° was 22 degrees cooler than 10/2's, its low was just three degrees lower.)


Spider web


Finally, October's plentiful rainfall followed a very dry September, in which just 0.95" was measured.  And while this was a decided contrast, it wasn't nearly as extreme as Sept/Oct 2005 when  October saw 16.73" after a paltry 0.48" in September; April/May 2007, when April had 13.05" and May had just 1.88"; and Aug/Sept 1882, when September had 16.85" and August only 1.14".


Here are links to other October recaps: