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Rochester, NY has had 31 straight (July 21-August 20) above average days. Also, there has yet to be a sub-80 high this month. Unfortunately, a cool front tomorrow will snap both these streaks.
Last date Seoul had below 25°C(77°F) was August 3rd, there was 29 days of tropical night out for recent 31 days since July 22nd so far.
Wow. We haven't had any nights that warm where I live. And we just finished a streak of 49 consecutive dates (July 3 - August 20) which stayed at or above 70 F / 21 C. All 49 of those days had lows between 70-76 F / 21-24 C.
Our warmest night this year is a 5-way tie; June 22, July 19, July 25, August 10, and August 11 all had a low of 76 F / 24 C. Our most recent "tropical night" was July 20, 2015, there was a low of 77 and it was the only tropical night in the year. We get them very rarely, it seems lows in the 74-76 range happen much more frequently (several times a year) but 77+ is much rarer.
77+ nights where I live, the past few years:
Spoiler
July 20, 2015 - low 77 F / 25 C
June 12, 2013 - low 78 F / 26 C
August 31, 2012 - low 77 F / 25 C
August 4, 2012 - low 77 F / 25 C
July 26, 2012 - low 77 F / 25 C
July 25, 2012 - low 78 F / 26 C
July 2, 2012 - low 77 F / 25 C
July 1, 2012 - low 81 F / 27 C!
June 30, 2012 - low 80 F / 27 C
July 25, 2011 - low 79 F / 26 C
July 12, 2011 - low 79 F / 26 C
July 11, 2011 - low 77 F / 25 C
July 29, 2010 - low 77 F / 25 C
June 13, 2010 - low 77 F / 25 C
June 21, 2009 - low 79 F / 26 C
June 20, 2009 - low 77 F / 25 C
August 23, 2007 - low 78 F / 26 C
August 21, 2007 - low 81 F / 27 C
August 17, 2007 - low 81 F / 27 C
August 6-11, 2007 - 6 day streak. Lows (in order): 77, 79, 77, 81, 82, 77.
August 10, 2007 was first 82+ F / 28+ C low since July 10, 1980.
Rochester, NY has had 31 straight (July 21-August 20) above average days. Also, there has yet to be a sub-80 high this month. Unfortunately, a cool front tomorrow will snap both these streaks.
The 80 degree streak came to an end after 21 days yesterday with a high of 79, but a warm night kept the above average streak going to 32 days.
That term should be "ultra-tropical night" like "ultrasonic". 77 is too high for avg tropics
I agree. 68 F / 20 C is good for "tropical night", though I'd edge the threshold up to 70 F / 21 C. 70 F or 21 C can be used interchangeably, as 21.0 C is 69.6 F, and many weather stations in the US round to the nearest F, meaning 69.5 = 70. But this idea works only if 21.0 C, and not something that rounds up to 21 like 20.7 or something is the threshold.
69.4 F - not a tropical night
69.5 F - tropical night
20.9 C - not a tropical night
21.0 C - tropical night
Anything 77.0 F / 25.0 C or higher - super-tropical night
Anything 86.0 F / 30.0 C or higher - oppressive night
Thing is, most tropical locations are extremely stable, and lows of 77 F or higher don't happen often there. Honestly, I think 22 C is a good threshold for "tropical" nights. 20 C is a bit too low IMO, that's a pretty standard low for a lot of continental locations in the summer, also there's places in the tropics that have never even gone down to 20 C.
BTW Wawa, not to nitpick, but 21 C is actually 69.8 F, not 69.6 F but yes either way it rounds up to 70 F.
Eureka, Nunavut qualifies as a subarctic (I think Dfc) climate this year! July averaged 57 / 48 F (14 / 9 C) with a mean of 52 F / 11 C. Even Cambridge Bay, at 69 degrees N as opposed to 80, averaged 57 / 43 F (14 / 6 C) for a mean of 50 F / 10 C.
Weirdly enough, summer started late there with the first above-freezing high on June 4. Every day since then has at least hit freezing. Usually they have their first above-freezing high in late May, and average highs hit freezing from June 2. From there, it warmed up QUICK. Last sub-freezing low was on June 7; every day from June 8 - August 17 had a low of freezing or higher.
Last forecasted high above freezing is on September 1. Normally, the average high drops below freezing on September 5, and the last above-freezing high of the year is around the second week of September. That would be interesting to see a shorter than average but record warm summer.
Not to mention, I don't think there's anywhere in the world that can grow trees and not reach freezing until June. There's some places near the arctic tree line that can have their first above-freezing high in May and grow trees. But as it is today, to grow trees, the average high needs to reach freezing by about May 20 and stay above freezing for about 4 1/2 months for a (tree-line) taiga forest.
I think it's time to try planting trees on the warmest areas of the Canadian Arctic Archipelago though. Obviously not Ellesmere Island, but maybe southern Victoria Island (near Cambridge Bay) and Southampton Island (near Coral Harbour) MAYBE, if the trees are placed in the perfect location (warmest microclimate, southerly aspect), with blankets wrapped around them in the winter, they might grow. Stunted though.
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the. threshold
but yes either way it rounds up to 70 F.
