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London winters are slightly warmer than NYCs, in the same way that NYC summers are slightly warmer than London's, the temperature difference in winter is about the same as it is in summer.
London winters are slightly warmer than NYCs, in the same way that NYC summers are slightly warmer than London's, the temperature difference in winter is about the same as it is in summer.
Almost but not quite. The difference in temperature in the summer is slightly greater than in the winter, by about 2-3F. Or, to put it another way, if you look at the yearly averages, NYC is a bit warmer overall. London is 59.4 / 45.5, NYC is 62 / 47.9. That may not seem like much, but that is a yearly average so on average NYC is warmer than London by 2.5F on any given day of the year. (Obviously it's not how it is this illustrates that small differences in averages aren't insignificant).
London winters are slightly warmer than NYCs, in the same way that NYC summers are slightly warmer than London's, the temperature difference in winter is about the same as it is in summer.
Technically, that’s not really accurate;
In the coldest month (Jan) NYC has a mean temp of 33 F (Central Park)….while London has a mean January temp of 42 F…so London is 9 F warmer in the coldest month.
In the hottest month (July) NYC has a mean temp of 77 F (Central Park)….while London has a mean July temp of 65 F…so NYC is 12 warmer in the warmest month.
The two cities are closer in winter mean temps... than in summer mean temps.
London winters are slightly warmer than NYCs, in the same way that NYC summers are slightly warmer than London's, the temperature difference in winter is about the same as it is in summer.
No it isn't. The temperature difference between London and New York during summer is roughly twice the difference between both cities during winter.
I averaged the mean temperatures of the winter and summer months in both cities, and got this:
Winter
London: 42.0°F / 5.6°C
New York: 36.1°F / 1.7°C
Summer
London: 63.8°F / 17.7°C
New York: 75.4°F / 23.6°C
New York's summer's are warmer than London's by 11.6°F (6.44°C), and London's winter's are warmer than New York's by 5.9°F (3.28°C).
Ok, well London loses its winter advantage when you compare Heathrow to Central Park. A fairer comparison would be to use St James's Park or Greenwich (though the temperatures for Greenwich on wikipedia are wrong).
Another thing is London in summer is cloudy compared to NYC, and much of the rest of the US.
London averages 212 hours of sunshine in July (Heathrow). If you take 16h10min for the average daily daylight hours in London in July, then subtract an hour for the low sun angle correction (morning and evening) for the sunshine measuring device, you come out with around 45% of possible sunshine.
Seems rather cloudy for summer.
If you do the same for Philly sunshine hours, yet subtract 10% for the diff in methods (250 hours off the yearly total), you get 58% possible sunshine in July. That is a noticeable difference and one backed up by any British person you talk to that has spent any prolonged amount of time here. And I have a feeling the diff in methods is more pronounced in fall and winter rather than summer, which means less hours should be subtracted from summer months and hence the summer % would go up (fall/winter % would drop).
I used Philly sunshine hours when I should have used NYC. NYC gets around 100 more hours than Philly (more coastal location I assumer), so the July diff would be even more pronounced with London.
Overcast days (where the US machine might register sunshine) are rather uncommon in summer compared to fall and winter months. In summer here, most days are pt. cloudy or clear.
Last edited by tom77falcons; 05-13-2013 at 09:23 PM..
Ok, well London loses its winter advantage when you compare Heathrow to Central Park. A fairer comparison would be to use St James's Park or Greenwich (though the temperatures for Greenwich on wikipedia are wrong).
I agree that you should compare airport to airport.
Ok, well London loses its winter advantage when you compare Heathrow to Central Park. A fairer comparison would be to use St James's Park or Greenwich (though the temperatures for Greenwich on wikipedia are wrong).
I used Greenwich (wiki) so the numbers are probably a little off.
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greater than in the winter, by about 2-3F. Or, to put it another way, if you look at the yearly averages, NYC is a bit warmer overall. London is 59.4 / 45.5, NYC is 62 / 47.9. That may not seem like much, but that is a yearly average so on average NYC is warmer than London by 2.5F on any given day of the year. (Obviously it's not how it is this illustrates that small differences in averages aren't insignificant).