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Old 12-02-2013, 01:38 PM
 
Location: Buenos Aires, Argentina
986 posts, read 832,859 times
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Inland Antarctica has a very curious pattern, including a summer seasonal "lead" and a winter seasonal "lag" and damn assymetric meteograms:

SUMMER
Amundsen-Scott (South Pole)
Nov: -38.3C
Dec: -27.5C
Jan: -28.2C
Feb: -40.9C

Vostok Station
Nov: -43.3C
Dec: -32.1C
Jan: -32.1C
Feb: -44.3C

WINTER
Amundsen-Scott (South Pole)
Jun: -58.0C
Jul: -59.7C
Aug: -60.0C
Sep: -59.4C

Vostok Station
Jun: -65.2C
Jul: -66.9C
Aug: -67.6C
Sep: -66.0C

In Amundsen-Scott, December is 13.4C warmer than February.

Amundsen-Scott: AMUNDSEN-SCOTT, ANTARCTIC STATIONS (ALL COUNTRIES) Weather History and Climate Data
Vostok Station: VOSTOK, ANTARCTIC STATIONS (ALL COUNTRIES) Weather History and Climate Data
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Old 12-02-2013, 02:44 PM
nei nei won $500 in our forum's Most Engaging Poster Contest - Thirteenth Edition (Jan-Feb 2015). 

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Location: NYC
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It makes sense, since at the highest latitudes winter is one very long night. So the coldest temperatures occur near the end of winter (or end of night). In contrast as summer progresses, the sun angle decreases even the day length is 24 hours. The daily cycle is asymmetric with a peak in the mid-afternoon, and a min around sunrise.
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Old 12-02-2013, 02:58 PM
 
Location: Broward County, FL
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I was about to say the same thing nei, and this similar type of pattern is found in Vostok as well. And also in Eureka, Canada (which is at 80 N) as well (coldest months are February and March) but I always supposed in Eureka's case that it was due to coastal influence.


If there was an inland location in the Northern Hemisphere at 78 N, it would follow a similar pattern to Vostok I presume?

Vostok Station - Wikipedia, the free encyclopedia
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Old 12-02-2013, 05:13 PM
BMI
 
Location: Ontario
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Quote:
Originally Posted by Glacierx View Post
Close, but July is still warmer than June, and December is still warmer than January.
Actually you only have to look at your neck of the woods Glacierx (BC interior) which IMO has seasonal lead, especially when compared to eastern Canada.

Starting in February, which is much warmer than January in the BC interior, not so in Ontario, only 1 or 2 degrees warmer at most.

Same thing with March, April, and May.

Warmest areas like Okanagan and Thompson-Fraser, are approx. one month "ahead" of
southern Ontario in spring, conversely BC interior autumns tend to be cooler and end earlier.
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Old 12-02-2013, 06:47 PM
 
Location: Wisconsin
621 posts, read 516,686 times
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Summit Camp is at 72N in Inland Greenland: Summit Camp - Wikipedia, the free encyclopedia

Great Falls WSCMO airport, Montana is colder in December (24.8F) than in January (25.2F) by 1981-2010 normals, though it wasn't the case in 1971-2000 and 1961-1990.

Nearby Carter 14W station has the same result, January averages 0.6F warmer by 1981-2010 normals and 0.4F over the entire record (1982-2013). Though August is much warmer than June in both places, there is lag in summer.

GREAT FALLS WSCMO AIRPO, MONTANA - Climate Summary
CARTER 14 W, MONTANA - Climate Summary
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Old 12-03-2013, 03:58 PM
 
Location: Finland
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Quote:
Originally Posted by snj90 View Post
July is not the halfway point. Summer begins around June 21, so for a place to have no seasonal lag or lead whatsoever, the summer solstice would be the warmest part of the year, on average, and the winter solstice the coldest.
Summer starts at June 1. June 21 is midsummer. The astronomical seasons make no sense. How could you say that Autumn starts on September 21 in Fairbanks, when the trees are full of fall leaves? And autumn starts a lot later in Alabama than Moscow.
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Old 04-22-2014, 03:32 PM
 
Location: Paris, Île-de-France, France
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Seattle, Phoenix, Denver is reaching lowest averages in December then slightly increase in January
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Old 04-22-2014, 03:47 PM
 
Location: Vernon, British Columbia
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Quote:
Originally Posted by tenkier7 View Post
Seattle, Phoenix, Denver is reaching lowest averages in December then slightly increase in January
77% of the United States and Canada are coldest in January.
20% are coldest in December
2.5% are coldest February
0.04% are coldest in March (only 4 places, 2 in Alaska and 2 in Hawaii).

Top places where December has the greatest difference from the 2nd coldest month:
1) Lytton, BC = Dec is 3.3F colder than the 2nd coldest month (Jan)
2) Mullan, ID = Dec is 3.2F colder than January.
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Old 04-22-2014, 06:14 PM
 
Location: Vancouver, Canada
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Quote:
Originally Posted by nei View Post
Coastal California has little winter lag or even a season lead. Eureka has a slightly cooler December than January, San Francisco is only slightly warmer in December. Together with the extreme summer lag (in San Francisco, October is warmer than August) coastal California must have one the most asymmetric seasons.

I can't understand why coastal California has no winter seasonal lag. Must be from air currents? December is the wettest month in Eureka, so the lower sunshine is probably the cause.
It's odd, but even though the summer lag is much more moderate, the winter lead is quite present here on the west coast of BC. December is the coldest month of the year for many coastal locations up until at least Bella Coola:

Bella Coola, British Columbia - Wikipedia, the free encyclopedia

By the north end of BC the increasing lows start to make January the chilliest month, but even as far as Prince Rupert the Jan highs are fractionally warmer than the December ones:

https://en.wikipedia.org/wiki/Prince...lumbia#Climate
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Old 04-22-2014, 10:26 PM
 
Location: Manila
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Beijing, based on what I observe seems to be another city with a "seasonal lead"... Check this out:

Beijing - Wikipedia, the free encyclopedia
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