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I wonder how often those maritime polar masses affect the northeastern US. Occasionally we have unusually long streaks of cloudy, cool, and damp weather (4-5 days). Not sure if it's from that or something else.
I would say Vancouver and the PNW in general is relatively stable. It's not quite as stable as somewhere as the UK or New Zealand but not too far off from that. Also if temps here go about 10C above or below the norms, it is newsworthy if not record breaking.
Our daily deviation is greater than the deviation in the monthly average.
Daily deviation is highest mid to late January. Peaks at 10.3°F for the max and 13.2°F for the min. When I say deviation I mean standard deviation, which means one standard deviation is 34% of temperatures are between the mean and the mean + (or -) deviation. Our mid January max is 34.5°F so 68% of January days are between 24.2°F and 44.8°F. Our mid January min is 12.6°F so 68% of January nights are between -0.6°F and 25.8°F
Summer is much more stable. Deviation is about 5.8°F for the max 6.9°F for the min in mid July. Mid July is about 84.3/59.1. So 68% of July days reach between 78.5°F and 90.1°F and 68% of nights between 52.2°F and 66.0°F. But had a lot of 90+ days later year...
Our daily deviation is greater than the deviation in the monthly average.
Daily deviation is highest mid to late January. Peaks at 10.3°F for the max and 13.2°F for the min. When I say deviation I mean standard deviation, which means one standard deviation is 34% of temperatures are between the mean and the mean + (or -) deviation. Our mid January max is 34.5°F so 68% of January days are between 24.2°F and 44.8°F. Our mid January min is 12.6°F so 68% of January nights are between -0.6°F and 25.8°F
Summer is much more stable. Deviation is about 5.8°F for the max 6.9°F for the min in mid July. Mid July is about 84.3/59.1. So 68% of July days reach between 78.5°F and 90.1°F and 68% of nights between 52.2°F and 66.0°F. But had a lot of 90+ days later year...
Great info there. Is standard deviation available from the NWS? I'll bet ours is similiar here in southeastern PA.
I'm sure one would have to go thru quite a lot of daily temp records to calculate it.
All interesting observations guys! I have always thought the standard metrics do not always tell a complete story about a place.
Earlier this month, we had a maximum of 33.6C, followed the next day with 21.8C. The day after this it went back up to 31.7C.
Apparently this degree of "swing" was very very rare for Sydney (vaguely recall someone saying this degree of swing hadn't happened for around 30 or so years).
I recall summers in my original town of Christchurch whereby it was not uncommon to have a day in the 30s, followed by a maximum in the teens.
Not a lot of variation from average temps here. Warmest average max during Jan/Feb is 23C(73F), yet most years wouldn't see 30C(86F). In summer, the sea breeze makes an effective thermostat. Rainfall can be more variable though.
One memorable exception was a temperature of 24 C (75F) at 4 am in early October, when the average minimum is 6 C(43F).
OK, after making my head hurt looking climate maps at WICCI (Wis. Inst. Climate Change Impacts) at the Univ. of Wisc. website, my conclusion is not much has changed in NE Wisconsin!
What I found very interesting, the very center of what people call the "north woods" close to the UP border has had more drastic changes. Here by the lake minimal, .75, 1 or 2, whereas the area around Rhinelander totally different in almost all areas.
Great maps, a good deal of info, thanks for the thought because I don't go to the university site for info because Madison is so far removed from me. Not smart though as they pull in info from the whole state!
Seattle Metro seems to be somewhat stable by my perception as far as temperature goes. We do get a cold snap or two in the winter, and a heat wave or two in the summer, but for the most part our daily temperatures don't seem to deviate from the mean temperatures by much in either direction for the most part. Our strong maritime influences sees to it. (We normally have very wet and mild winters, where the average lows are even above freezing, with dry and mild summers with daytime highs averaging under 80).
This year, however, being a La Nina year, we spent a number of weeks well below normal. Sometimes a week or two in a row about 10 degrees below normal. The weather man on Q-13 said he is expecting a warmer than normal summer as well. We'll see.
Seattle Metro seems to be somewhat stable by my perception as far as temperature goes. We do get a cold snap or two in the winter, and a heat wave or two in the summer, but for the most part our daily temperatures don't seem to deviate from the mean temperatures by much in either direction for the most part. Our strong maritime influences sees to it. (We normally have very wet and mild winters, where the average lows are even above freezing, with dry and mild summers with daytime highs averaging under 80).
This year, however, being a La Nina year, we spent a number of weeks well below normal. Sometimes a week or two in a row about 10 degrees below normal. The weather man on Q-13 said he is expecting a warmer than normal summer as well. We'll see.
I would expect from Seattle. The prevailing onshore flow keeps the temps in the range of daily temps cool and steady. However, I have seen on the weather map a few times though when a passing storm halts the normal invasion of sea air in summer, and the flow comes up from the southwest. Seattle has reached 96 F once under this pattern. The temp's have small daily ranges in Seattle, which is a little suprisng how stormy much of the year is. I guess most cyclonic storms that pass through the Pacific Northwest are strongely occluded, and lack warm sectors.
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