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I know, one of these threads again. But I think they make a good conversation and debate. Anyway, I noticed that Sydney and Boston have similar summers. Except, the latter would be more consistently muggy but less likely to get extreme heat (38C+), and the former will be more prone to cool changes, despite getting extreme heat. Furthermore, Sydney's summers are longer, although Boston does have a month with warmer highs. Now, overall, would you say that Sydney (ONLY the CBD) or Boston have a hotter summer?
P.S. I was about to do NYC instead of Boston. But I realized that Sydney wouldn't stand a chance, as NYC's summers are virtually tropical with those 20C average lows in July.
Boston is more consistently humid than Sydney? I would have assumed the opposite? I guess hot, dry inland airflows for Sydney? Boston's lowest humidity summer weather is usually also cooler than average summer weather. Hot and dry is rare.
Boston is more consistently humid than Sydney? I would have assumed the opposite? I guess hot, dry inland airflows for Sydney? Boston's lowest humidity summer weather is usually also cooler than average summer weather. Hot and dry is rare.
I'd say Sydney due to such an intense sun and high UV which would make it more harsh. Sydney can also get days of 40C and these extremes are alot more common in recent years.
Looking at summer only, Boston averages 24 days equal to or greater than 30C; Sydney averages 9 such days. Plus when it gets hot in Boston it's usually humid. So I think Boston would feel hotter in summer.
Summers in New England seem to be heading the same way too, though. I don't look at the models for the NE US regularly, though it seems to me that midsummer cool shots are usually restricted to the far NE. In Sydney, we receive modified cold fronts that drop maxima to the mid-upper 70s F once per week on average. However, these changes might become less common as waters warm.
All things considered, I'd go with Sydney, but it's a fairly close thing. The length of summer in Sydney is a key psychological factor; in Boston, you're guaranteed a sharp cool-down in mid-autumn after a warm summer.
Keep in mind that the data for Sydney is taken at Observatory Hill, which is right on the coast with near-clockwork seabreezes on summer afternoons and is one of the coolest locations in the entire metro area. Slightly inland things get warmer. Bankstown Airport is a better representation for the majority of the population Climate statistics for Australian locations The 30C day count goes up to 38
Location: The Valley Of The Sun just east of Canberra
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The OP did emphasise that the analysis should be limited to the Sydney CBD, i.e. Observatory Hill. However, most of the Sydney CBD is probably warmer than the (harbourside) Observatory Hill in a typical summer seabreeze regime, though there's no weather station to confirm it. The quality of Observatory Hill is an old chestnut that is debated ad nauseam on Australian weather forums, so I won't bother with it here.
To properly answer the question, obtaining the mean 24-hour temperature during the three warmest months of the year would be useful. In Sydney, this value is roughly 21C/70F in December and 22C/72F in January and February. Statistics from a reliable PWS (say, a Davis Vantage Pro) in the Boston area could provide this information, but we'd need someone that is familiar with the areas' climate to weed out bad data.
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