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That map looks about right for NYC. It's highest average high is 84 (85 for a few days). It's usual summertime maximum is between 92 (during a cool summer like last year) and 98. Once in a while we break 100, breaking the 10-15 band. In recent years that occurred during 1991, 1993, 1995, 1999, 2001, 2010, 2011, and 2012. We did make 104 during 2011. Even during extremely cool summers, such as 2004, we made 91 at least once, for 7 over the average maximum high.
Quote:
Originally Posted by Maxwell Senf
Our summers are less stable than our winters. That makes sense. A typical summer here consists of highs in the upper 70s for a few weeks followed by a few days in the upper 90s to bring the average to 80/81. I suspect our median is lower than our mean. Basically the opposite of winters in the South.
Our winters are less stable. Our minimum low is 26, and we almost always go below 11. The last two winters we got to 2 and 3, I believe. That's 24 or so degrees under the typical minimum. New York City has never hit 108.
In terms of winter lows, there are abundant numbers of subzero readings, as low as -15F. A full 41 degrees below 26.
As discussing in the Winter Stability thread, you can't just use 1 extreme per year to get a result of stability. So be careful using that.
I guess - taking away the extreme only makes it even more stable. Looking at last summers result for example, the average daily maximum over the three months(24.3C/75F) was only exceeded by more than 3C/6F, on two days.
The average summer maximum is 23.7/74F, while 30C/86F is a one in three year event here, and 31C/88F is closer to one in ten years, so this system works well for here, I think.
Winter is even more stable, with the all time record low of -6.6C/20F only 2.4C/5F colder than the annual record low and only 7.7C/16F colder than the July average minimum (1.1C/34F)
Every summer, without fail, we will see at least 2 days exceeding +10°C of the average high in summer. Even in the cool ones. The lowest max. high of the year since records began in 1970 for my location is 36.4°C, on March 3, 1974 and Feb 6, 1984.
March 1974 avg. max: 26.3°C (+10.1°C)
Feb 1984 avg. max: 26.5°C (+9.9°C, close enough)
Winter however is very stable. Rarely goes within 5°C either way of the avg. max.
5-10 F where I live. Maximum high is 90 where I live, and average warmest day is 98. It's a little less than I would like. Average high of 90 is good, but I want some occasional triple digit days, maybe 3-6 a summer.
a couple graphs I made to add to the thread. First distribution of daily maxes by month for San Francisco (Jun-Oct). Relative frequency of each temperature, rounded to the nearest °F. For each curve, summing over all values of temperature would equal one.
The two vertical lines refer to the mean daily max during that period, and the extreme max of the period (warmest temperature for an average year). You can see there's one peak or mode, roughly in the mid 60s, but as the warm season progresses from July to October, the temperature distribution becomes less peaked and the tail becomes larger — much warmer temperature are more likely.
Now, a graph for Paris, just July and August. The dateset is only 1900-2000. The two lines are the average max and extreme max of a year.
A comparison with Amherst and Portland, different time periods for each.
Different shape for all three locations. Portland doesn't have much of a mode in temperature, and is more prone to very hot temperatures. Much warmer than average afternoons are unlikely in Amherst, at hotter temperatures the gap between Paris and Amherst lessens.
I wonder if we had easy access if we can use the dew points to see how unstable it is in the Northeast. That would be interesting...
I wonder how many times the South drops to the 40s in the Summer. The air feels amazingly dry and chilly in fact. Thank God for these breaks around here.
Although temps are more stable as usual. Still near or above 60°F for the coast. Temps in the 50s & 40s just north of the coast and interior.
Temps in the summer are more stable then the DPs but I'd be curious to see how much. Here's the CT coast.. Dewpoints were in the 70s for 24+hrs now in the 40s/low 50s. The atmosphere feels so different but like I said, the temps aren't that much different from normal.
Yeah, all of them disappeared from the forum for some reason. Don't know why.
Can you recreate the maps again please?
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