JBG

2002 did not, from what I remember, have a hot September. I remember August being hot, until a rainy and cool last week. I agree with you about April, late June, July and most of August. 1994 was quite hot through the end of July; as if the weather G-ds had access to a calendar. The cooldown actually signaled the 1994-5 El Niño, and 1996's cool summer presaged the super El Niño of 1997-8. Second La Niña summers are also frequently hot in May or early June, cool thereafter. Examples of this are 1974, 1984, 1989 (though with one July and one September heat wave), 1990, 2000 (brrrr), and 2008 (almost a match with 1925 and 1984 for the big June heat wave). 2011 kept the heat going a while longer than most second-summer La Niñas.

1995 had a few hot days in advance of a back-door cold front in July, and a substantially above-normal August and early September.

1977 was one of those rare El Niño summers with big heat. 2002 is the only other one I can think of. El Niño is usually a cool signal for summers. Think 1969 (one four-day heat wave, a fair number of individual hot days but lots of cool weather and rain), 1972 (June and early-mid August very cool though July and September each had hot weeks), 1979 (one three-day heat wave in May), 1982 (one very hot week in July, otherwise cool), 1992 (historically cool, three-day waves in May and July, with some cooling help from Pinatubo), 2003, 2004, and 2009 (June and July historically cool, three-day heat waves in April and August). 1977 was in many ways a lot like 1969 and 1982, just with a bigger temperature spike. That is why we remember 1977 as a hot summer even though it really wasn't.

Even 1977's hottest day, 104°, was followed by an 87° day, the only cooldown that I know of (may one in 1995) that wen from 100+ to under 90 in a day. 1995, however, was a proper roaster of a summer.

1977 had a very hot period but I doubt that overall it was anywhere near a record. June and August were not hot.

Looks like it's just not happening this summer. Almost a summer cancel but a bit early to call that.

Also though a smattering of 90's and lots of 80's.

I experienced 1966. Basically it was a six-week wonder, from the last week of June to very early August. The other summers had much better distribution of heat. 1980 and 1983 were hot for most of June to most of September. 1991 and 1993 even better, from early May to about two to three weeks after Labor Day.1970 wasn't bad in that regard but it's top temperature for the summer I think was 94° and we didn't have quite the number of 90° toppers. 1973 topped out at 98° or 99° in late August-early September, and the heat had started around June 9 or so. 2002 at least had the merit of covering the last week of June until the heat abruptly ended in a rain bath in late August. 2010's heat covered all of July through the first two or so weeks of September.

It depends, I suppose, on if the summers are ranked in number of days over 90, 95, 100, or overall average. I know 1980 is the warmest for June - September, so periods of time also matter. In 2010 the heat stretched into September, In 1966 I think we hit 94° as a record once in August. I remember, in sleepaway camp in Massachusetts, July was rather hot and August downright chilly.

1944,1955 (hottest and driest July until 1999),1966 (three days over 100°), 1977 (three days over 100°), 1988 (the start of the "global warming" hysteria and Hansen's hilarious testimony on "greenhouse effect"), 1999 (see comment on 1955) and 2010 ( two or three days over 100°, I forget, and major late August into early September heat wave) were all major bake-offs. Will 2021 repeat? I hope so unless our pool doesn't reopen soon.

It looks like about 9" here in Rye Brook. I don't think sleet mixed in. Temperature bounced between 23° and 25° during the night.

Remember the Valentine's Day Sleet Storm, February 14, 2007?

And Christmas 1969. Remember that one?

If you believe averaged or adjusted worldwide figures seemingly made to order, yes.

Agreed. And their chosen remedy of a tax on affluent countries makes me suspicious of their agenda. Shake of the tin cup?

Well, October 2, 2019.

November 15, 2019.

December 26-27, 2010 and April 7-8, 1982. Hands down.

88° according to Wunderground. Not 90° but not bad for September 25. I still remember the September 25 when in hit 90° in 1970. Snowflakes were in the air about 2 or 3 weeks later. Just flurries but still.

I actually remember that happening during the March 1970 eclipse, and some cumulus clouds dissipating in the process

There were other cases than 1953. 1970, 1973, 1983, 1991, 1993, 1995, 2005 and 2010 all had hot Septembers albeit some not official heat waves, I believe. And the only thing that kept 1973 from equaling 1953 was the shading of Central Park, even then. Most of these were rising La Niña events. I don't know if the current Niña is starting fast enough.

Central Park is getting more forested as we go. KEWR is surrounded by I-78, the New Jersey Turnpike and highly urban Newark. Those areas aren't going to forest. The disparity will be huge in summers where the area fringes 90 often, with say KNYC getting 87 or 88 pretty often. Other such summers were 2004, 2008, 2009 and I think last summer. In summers such as 2005, 2010 and 2011 where the whole area is often in the mid-90's there won't be much of a difference.

I am quite sure, if we had good records going back to the beginning of the "Common Era" (or for Christians the time of Christ) there'd be thousands of fluctuations during moving 30-year periods. That is why I have long suggested using 50 year base periods, now that we have good records at most stations. I think there is a lot of statistically insignificant "noise." Add to that the effect of "smoothing." One note in the other direction. The 30 year averages, for the longest time, gave KNYC a mean of 78 for a week or so in mid-to-last July. That has now been "smoothed" to make the 77 figure hold as the mean from about July 10 to August 10. And the mean high temperature has been "reduced" from 85 to 84. Do these changes mean anything?

Further to this analysis, KNYC has been plagued by a reverse of the UHI effect. New York City's Central Park is actually man-made. Previously it was a mixture of slums, farms and slaughterhouses. It has been progressively getting more densely forested. New York City's weather station is also located there. Back in the 1970's the thirty-year moving average for summer temperatures included about a week where the mean was 78, implying a high of about 86 and a low of about 70. It could have been an 85/70 split since the practice is to round upwards. By the early 2000's the "78 degree" bulge was cut to two days and in the most recent thirty-year period eliminated. Now the average maximum high-low is rated as 84/69, for the period, roughly, July 10 through August 10. This works out to a 76.5 mean, or a full degree lower than the mean for most of the corresponding period historically. The number of 90+ days has also dropped at Central Park (KNYC), so that in the recent summer we have only touched 90 for 7 or 8 days (today may be the 8th day). This summer was considered a cool one. Summers with similar weather patterns, i.e. relatively cool ones, such as 1969, 1972 and 1979 had more 90+ days. 1969 did have a few 96 or 97 days that clearly would have topped 90 even now but nowadays the same situations that created 90-92 degree Central Park readings now create 87-89 degree readings. All you have to do is look at statistics for LaGuardia Airport (KLGA) to see the difference. I am thinking about originating this as a separate thread.

At least at KNYC we exactly matched 1972 for first 90 degree day. I will point out that in those days KNYC had less vegetation and the high that day was 91. So in real world this first 90 day was probably a hotter day than 1972.