Today in New York Weather History: September 5
Today in New York Weather History: September 7

Today in New York Weather History: September 6



Three weeks after 6.24" of rain fell (between 8/12-18), 4.17" fell from 9/2 to 9/6, with today seeing the most, 2.24".  In less than four weeks (8/12-9/6) more than eleven inches of rain fell.  Four days had rainfall of one inch or more.




It was a chilly and showery day (0.32" fell), with a high/low of only 56°/49°.  The day's high temperature was 22 degrees below average and more typical for the first week of November.  The low tied 1924 for the second earliest low in the 40s (earliest is 9/4/1883).  This was one of nine days in September that were ten degrees or more below average, a month that would be the chilliest September of the 20th century. 


The remnants of Hurricane David moved through between 4 AM and daybreak with 50-mph winds and 1.22" of rain.  While it was a hurricane, David was one of the most powerful on record, the only category 5 storm to strike the Dominican Republic, where it killed thousands.  By the time it made US landfall in Georgia it was considerably weaker.


It was a day with Mother Nature's broiler on as the high/low was a sizzling 94°/77°, fifteen degrees above average.


Today's high/low of 93°/78° was 15 degrees above average.  This low temperature, the warmest recorded in September (in the years since 1900), also occurred in 1983 and 2010.  Today was also the last day this year with a high in the 90s.  In total, only nine days saw 90+, the fewest since 1975 (the average is eighteen).


Today was the 15th day in a row with below-average temperatures.  During these days, temperatures were five degrees below normal.


Today's high of 90° was the last 90-degree temperature of the year.  In total, there were only eight days in the 90s this summer, well below average.


Tropical storm Hanna dumped 3.54" of rain, mostly between 3-9 PM.  Rain was heaviest between 5-6 PM when 0.97" poured down.  As a hurricane, Hanna devastated Haiti and killed more than 500.  It made landfall in the US near Myrtle Beach, SC.  The rainfall Hanna dumped on New York was the most in a 24-hour period all year and the most in sixteen months.  It was also a record rainfall for the date (and the first rain on this date in 12 years). 




Beginning shortly after daybreak, 3.22" of rain fell today, just 0.04" shy of the record for the date, set just three years ago; much of the rain fell between noon and 8 PM.  Rain fell for 48 hours and was produced by tropical storm Lee, and further enhanced by a cold front.  In total 5.33" was measured.  


Today was the last day of a week-long warm spell in which every day had a high of 86° or warmer.  The high/low during this stretch, the longest of the summer, was 89°/72°, nine degrees above average.  Three of the seven days had highs in the 90s, including today's 91°.  This was the eighth year in which Sept. 6 was the last 90-degree of the year - the most of any date.


Today, with a high of 93° (and a heat index that peaked at 104° in the early afternoon), was the end of and eleven-day stretch of unseasonably warm weather that had an average high/low of 88°/75°.  Relief arrived in the evening when a thunderstorm between 6:00 and 7:00 produced 0.36" of rain.  This hot stretch of weather had two four-day periods of hot weather at the beginning and end, with each having three days in the 90s and three days with lows of 75°+. 


The northernmost bands of showers from hurricane Dorian moved through during the afternoon and early evening, with most of the minimal rainfall pouring down between 3-4 PM (when 0.27" was measured).  With the storm situated to the south-southeast of the metro area, winds were from the east-northeast (peak gust at Central Park was 29 mph), making it unseasonably cool.  Before the rain moved in during lunchtime the mercury peaked at 67° then dropped to 58° by evening, the first time since mid-June that a high and low were in the 60s/50s. 







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2021 - today was Labor Day, and with a high of 81°, this was the first 80° day of the month. the last time September's first 80° day was this late in the month was in 2006, when there was a high of 80° on September seventh. fifteen other Septembers have also had their first 80° day this late in the month as well. however, something definitely worth noting is that there has actually been one September (1883) that has not had any 80° days.

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