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Old 08-27-2009, 08:42 AM
 
Location: Subarctic maritime Melbourne
5,060 posts, read 2,955,807 times
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Quote:
Originally Posted by ColdCanadian View Post
If Toronto has had an overnight low of 30 C, it seems easy for NYC to have a low of 31 C.

It might not have been our "official low", but it was forecast in a reputable newspaper, as well as on our local cable channel.
With my own eyes I SAW it was about 85/86 F (30 C) at 5:30 am on several of our outdoor thermometers.
(and there was no errors from sun-heat on them; sunrise hadn't happened yet )

*Toronto has a MUCH higher population density than any city in Australia.
My city which is like a suburb beside Toronto has a population density only 10% lower than Sydney.
Toronto meanwhile has 3-5 times the density of the city I live in.
I hear NYC is even more dense.
(city density figures compared on "Wikipedia")

*Most of our streets and sidewalks are deliberately made extra-wide, to accomodate room to pile snow in winter... this adds to heat-island effect.

*Frost goes down 3 feet around here, so a lot of structure goes down at least that far to avoid cracking or heaving
(thicker pavement for sidewalks, roads and highways) adding "thermal mass"

* Remember with more people, there are also more air-conditioners dumping extra heat outdoors too.
Interesting facts, never actually considered those. I suppose that anything above 25C at night is still a rareity though.

In Melbourne the all time record high overnight low is only 30.6C, while nearby Adelaide has recorded 34C at night over the last few summers
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Old 08-27-2009, 11:54 AM
 
Location: Perth, Western Australia
9,598 posts, read 15,170,715 times
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Quote:
Originally Posted by §AB View Post
Interesting facts, never actually considered those. I suppose that anything above 25C at night is still a rareity though.

In Melbourne the all time record high overnight low is only 30.6C, while nearby Adelaide has recorded 34C at night over the last few summers
Another thing I just remembered,
we probably have more layers of thin cloud and/or humidity.
A clear sky here is still usually "baby blue",
even paler blue than the pics I've seen from Seattle on a sunny day.
The only time we get "deepish blue skies" are from clear skies seem to be caused by powerful cold-fronts.

25 C low a rarity?
Definitely... but no more "rare" than a high of 33 C.
I don't recall our mildest low so far,
but I believe we've had at least one low of 23 C and several lows of 22 C this summer
yet no highs exceeding 32 C.

*30.6 C for a record highest low in Melbourne?
Not bad considering how crummy you say the weather usually is.
That's much higher than Sydney's or Perth's record highest low, isn't it?

Last edited by ColdCanadian; 08-27-2009 at 12:10 PM..
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Old 08-27-2009, 11:58 AM
 
Location: Eastern Sydney, Australia
1,876 posts, read 1,408,272 times
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Quote:
Originally Posted by MrMarbles View Post
For July (hottest month), highest recorded maximum is 106F/41C and minimum is 52F/11C. June (coldest summer month) lowest minimum is 44F/7C. I'm actually a bit surprised about how high the lows are. 52F is cold, to be sure, but not that cold for a RECORD minimum, especially given what I hear the the low temperatures are out west. Lows in the 50s are average in Denver in the summer, for example.

Anyway, these records were recorded many decades ago and it would be very rare for temperatures to even approach these them. Also it seems July and Aug seem to have the least difference between record highs and lows while winter and early spring the most.
Thanks for that, the maximum sounds about right. As for the highest minimum, I read somewhere that it was 28 - 29oC (82F - 84.2F)
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Old 08-27-2009, 12:05 PM
 
Location: New York City
2,792 posts, read 2,774,150 times
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Quote:
Originally Posted by koyaanisqatsi1 View Post
Thanks for that, the maximum sounds about right. As for the highest minimum, I read somewhere that it was 28 - 29oC (82F - 84.2F)
Highest minimum? Would that be the highest night temperature? Weather sites don't record this (or at least, I don't know which) so I can't say. What I provided is the lowest minimum.
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Old 08-27-2009, 12:18 PM
 
Location: Eastern Sydney, Australia
1,876 posts, read 1,408,272 times
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Quote:
Originally Posted by MrMarbles View Post
Highest minimum? Would that be the highest night temperature? Weather sites don't record this (or at least, I don't know which) so I can't say. What I provided is the lowest minimum.
Yes correct. I'll try and find the link for you but am off to work soon so will do it later tonight. Thanks for the lowest minimum anyway
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Old 08-27-2009, 12:43 PM
 
Location: New York City
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Quote:
Originally Posted by koyaanisqatsi1 View Post
Yes correct. I'll try and find the link for you but am off to work soon so will do it later tonight. Thanks for the lowest minimum anyway
Um, isn't it 2am where you are? When do you sleep?
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Old 08-27-2009, 03:16 PM
 
Location: Eastern Sydney, Australia
1,876 posts, read 1,408,272 times
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Quote:
Originally Posted by MrMarbles View Post
Um, isn't it 2am where you are? When do you sleep?
I responded to your other post at 4am AEST. Now 7 15am Friday 28th August. I don't need much sleep, 5 to 6 hours is enough for me. (I'm using a portable laptop BTW if you're wondering)
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Old 08-28-2009, 05:49 PM
 
Location: Eastern Sydney, Australia
1,876 posts, read 1,408,272 times
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Quote:
Originally Posted by koyaanisqatsi1 View Post
Yes correct. I'll try and find the link for you but am off to work soon so will do it later tonight. Thanks for the lowest minimum anyway
Here's a link to a NYC site which lists all time temperatures etc:

Weather2000.com - New York City Extreme Heat / Hottest 100° Days

Highest minimum is 84F (28.8oC) twice in 1908 and 1995, that's pretty impressive.

Also note the bar graph of number of 100F (37.7oC) days, greatest number experienced occurred in the decades of the 1950s and 1990s.
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Old 08-29-2009, 10:38 PM
 
Location: New York City
2,792 posts, read 2,774,150 times
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Quote:
Originally Posted by koyaanisqatsi1 View Post
Here's a link to a NYC site which lists all time temperatures etc:

Weather2000.com - New York City Extreme Heat / Hottest 100° Days

Highest minimum is 84F (28.8oC) twice in 1908 and 1995, that's pretty impressive.

Also note the bar graph of number of 100F (37.7oC) days, greatest number experienced occurred in the decades of the 1950s and 1990s.
Very interesting, thanks! Looks like there have been no 100F days since 2001. I blame the sun spots.
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Old 09-04-2009, 08:07 AM
 
Location: London
60 posts, read 56,450 times
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Im going to Paris on Monday. Wish me luck for the weather!
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