2020年11月 Saint 云 天气 Summary

Average temperature means the average high and low temperatures 在某一天. The average comes from the 30 years within the past 3 complete decades. So, we are still working with 1981-2020 data. But, that doesn't guarantee that any day actually has an average close to that average temperature. That is the story of 2020年秋季 (1 9月 through 30 November) in St. 云.

On the following set of charts (example: 9月) from the NWS in the Twin Cities, the St. 云 average high temperature is where the green area meets the red area and the St. 云 average low temperature is where the green area meets the blue area. The ends of the reds and the blues are the record high and low temperature for each day. 在9月,只有 30天中的15天 had an daily temperature within 5 degrees of average, and that was the month that ended up being the closest to normal (1.4 degrees colder than average)! 10月,只有 8 of 31 days were within 5 degrees of average with the monthly average being 5.比正常低7度. 在11月, the temperature has been within 5 degrees of average 30天里只有8天. 月平均是5.比平均温度高6度. 然而, there were nearly equal swings both warmer and colder than average, so the average temperature for the entire three-month period was within half an degree of average, despite only 31 of the 91 days being within 5 degrees of average..

The most extreme period of each month broke records. 9月 had a very warm start, but the period between 九月八日及十日 produced 6 daily record cold temperatures, including 2 highs in the 50's, typical of the 十月底. Another even more extreme period happened between 10月17日和27日. Highs were as cold as the 30s and even 20s, typical of 感恩节 甚至 12月初在此期间. St. 云定或结 4天内6次创纪录的低温.

另一方面， 十一月暖期 between the third and ninth produced highs in the 60's and 70's, typical of 9月. 在那里 were 9 record daily warm temperatures set between the third and the eighth, including new November records for high temperature (76 on the 6th, 打破了75英里的旧纪录, 定于11月8日, 1999) and average temperature (64 on the 9th). 旧的记录是61, 定于11月5日, 2008年7日平局, then broken on the 8th and the 9th.

The ups and downs of November ended up producing an average temperature of 36.0度, 5.比平均温度低6度. That makes 2020年11月 the 15th mildest November out of the 139 Novembers in St. 云天记录. 这已经接近排名了 both Duluth (17th mildest) and International Falls (15th mildest).

The wild temperature swings in October and November brought snow during each of the cold periods. St. 云又增加了8个.11月为0英寸， 7.2英寸 in the storm on 11月10日. 15.8 inches through 11月30日 is 6.比平均水平高出2英寸. This produced another 8 days of snow cover, adding to the 8 October days of snow cover and the 7.总共8英寸的雪. 即使有 圣保罗的地上没有雪. 云 or much of Minnesota as of December 2, the 16 days with at least 一英寸厚的积雪 是圣. 云记录. 然而, melting that snow is typical as the average period of 86 straight days with at least an inch of snow cover begins around December 10. 而 10月20日的暴风雨 设置了吗? 圣雪纪录. 云, the 11月10日 storm fell well short of the 11月10日 snowfall record (13.2014年2英寸).

The storm of 11月9日 and 10 ended up dumping 2.03 inches of precipitation during the two days, but that failed to break the 日降水量记录. That storm nearby doubled the average precipitation (1.38 inches) for the entire month of November, but the main storm track then pushed well to our south and east for most of the rest of the month, 所以只有2个.总共下降了27英寸. 2020年11月 ended up as the 20th wettest November out of 127 in St. 云记录. The 11月9日-10 storm along with the 10月11日暴雨 这打破了一个 日降水量记录 (1.11 inch) and a rainstorm on 9月 24 (1.13 inch) ended up producing the vast majority of the fall precipitation. 这三场风暴产生了4.27 inches of the fall total of 6.42英寸. 总数仍然是0.比平均水平低91英寸. 这一年，圣. 云 is less than an inch below average with 26.21英寸(-0.70英寸).