June 2025 discussion-obs: Summerlike

[donsutherland1]

1 hour ago, LibertyBell said:

Thanks for this, benchmarks always intrigue me and I remember a few of the ones you listed.

Do you have a list of benchmarks for JFK too? That 95 in early October is one that comes to mind for me.  And of course the earliest ever 100 that occurred last week has also become a benchmark now.  Another one is the earliest ever 99+ degree temperature on May 29, 1969 that really stands out to me as well as the earliest 90 degree reading from April 11, 1977.

It's interesting that the JFK period of record began in 1948 and they immediately recorded their latest 100 degree temperature in the same summer (and back to back 100+, while NYC had three in a row during that same span of time.)

 

[LibertyBell]

1 minute ago, donsutherland1 said:

wild, 98 on September 10, 1983 and then 96 on September 11, 1983 after two 100 degree readings in July and August, 1983 and 2010 were our only truly great summers (great from beginning to end.)

 

 

[Roger Smith]

Thanks Don, I was going to say that I didn't have a list but you probably would be able to generate one. 

[Roger Smith]

My NYC list has a different structure through winter, Don has used the calendar year to generate his list, and if I did that it would add a few, making Dec 24, 2015 (72F) a legitimate entry, then 70F Dec 29, 1984, 65F Dec 30 1984, 63F Dec 31, 1965, 62F Jan 1, 1966, 68F Jan 2, 1876 and 72F Jan 6, 2007. (next as per my list, 73F in Feb 1949 etc).

The equivalent to my mid-winter reversal method for JFK, I think, would be to skip all the entries of 70F or lower in Dec, then 71F Jan 6, 2007, followed by February's highest value, and on to the listed values from March onwards. Or reverse in late January if there is a higher value than February there. 

 

[donsutherland1]

39 minutes ago, LibertyBell said:

wild, 98 on September 10, 1983 and then 96 on September 11, 1983 after two 100 degree readings in July and August, 1983 and 2010 were our only truly great summers (great from beginning to end.)

 

 

I also compiled the benchmark record high minimum temperatures since 2025 set one, as well during the recent heatwave.

[Santa Claus]

bust lol

[donsutherland1]

51 minutes ago, Roger Smith said:

My NYC list has a different structure through winter, Don has used the calendar year to generate his list, and if I did that it would add a few, making Dec 24, 2015 (72F) a legitimate entry, then 70F Dec 29, 1984, 65F Dec 30 1984, 63F Dec 31, 1965, 62F Jan 1, 1966, 68F Jan 2, 1876 and 72F Jan 6, 2007. (next as per my list, 73F in Feb 1949 etc).

The equivalent to my mid-winter reversal method for JFK, I think, would be to skip all the entries of 70F or lower in Dec, then 71F Jan 6, 2007, followed by February's highest value, and on to the listed values from March onwards. Or reverse in late January if there is a higher value than February there. 

 

This is what I get using the calendar year for Central Park:

 

[Roger Smith]

Bonus coverage, here's a list of benchmark record high minimum values (for NYC) ... I reverse them at the point where the trend line reverses in early February ... 

(going up)

51F __ Feb 5, 1991 (mildest in period Jan 28 to Feb 15)

56F __ Feb 16, 2023

58F __ Feb 24, 2018

63F __ Mar 10, 2016

66F __ Mar 31, 1998

68F __ Apr 9, 1991

70F __ Apr 14, 2023

74F __ Apr 17, 2002

76F __ Apr 18, 2002

77F __ June 1, 1895

78F __ June 4, 1943

79F __ June 10, 1984

80F __ June 23, 2025

81F __ June 24, 2025

82F __ July 2, 1901

83F __ July 6, 1999

84F __ July 7, 1908

(84F also July 15, 1995 and July 22, 2001)

84F __ Aug 14, 1908

(heading down now)

81F __ Aug 29, 2018

79F __ Sep 7, 1881

78F __ Sep 11, 1983

77F __ Sep 23, 1970

75F __ Oct 5, 1898

72F __ Oct 8, 2017

71F __ Oct 10, 2018

69F __ Oct 25, 1908

67F __ Nov 2, 1971

66F __ Nov 6, 2015, 2022

64F __ Nov 11, 2002, 2020

63F __ Dec 24, 2015

59F __ Jan 4, 1950

56F __ Jan 14, 1932

54F __ Jan 15, 1995

53F __ Jan 27, 1916

(and back to 51F Feb 5, 1991).

... very few of these are concurrent with high max benchmarks (Mar 2016, Apr 2002, Sep 1881).

... the midsummer situation is different, a plateau of four equal values, not one peak as in July 1936.

 

 

 

 

[SACRUS]

Highs:

 

ACY: 91
EWR: 89
PHL: 88
New Brnswck: 87
TTN: 86
YEB: 86
BLM: 85
LGA: 85
NYC: 83
JFK: 82
ISP: 82