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September 2021 Saint Cloud Weather Summary

September 2021 Saint Cloud Weather Summary

2021年是明尼苏达州的温暖季节,从春末到夏季的大部分时间,天气持续干燥. However, since the second half of August, 明尼苏达州的大部分地区都更靠近风暴的主要路径, so beneficial rains have occurred. Still, 雷暴是降雨的主要方式, the highest totals have been spotty. The St. Cloud Regional Airport picked 3.82 inches of September rain, 0.81 inches above average. 那场雨主要为地面提供了一些水分, 但自8月下旬开始降雨以来,降雨量仅保持在平均水平.

下表显示了干旱时期的极端情况, 在5月初到8月19日之间,降雨量的最大缺口超过7.5英寸. Since August 19, the St. Cloud Airport has 7.79 inches, nearly two and a half inches above normal, 比前三个半月的总降雨量高出一英寸半多.

在这个温暖季节(5月1日至8月19日)最干燥的时候,圣. Cloud Regional Airport had only 6.03 inches of rain compared to the 13.80 inch average.

St. Cloud's "Seasons" of 2021 Dates Rainfall (in) Average Rainfall (in) Difference (in)
"Dry" Season May 1- August 19 6.03 13.80 -7.77
"Wet" Season August 20-October 5 7.79 5.36 +2.41
Total May 1-October 5 13.82 19.16 -5.34

2021年5月至9月是有记录以来140年来第21个最干旱的时期(13年).21 inches actual, 17.平均65英寸),但这是一个很大的进步 the 9th driest May-August.

西部多雨,东部和南部少雨

附近的其他地区则有更多的降雨. Much of Morrison, Stearns, Meeker, 和坎迪约希县9月份的降雨量超过5英寸(红色) NWS Minnesota September rainfall). St. Cloud State University had 4.60 inches of rain in September. On the other hand, 舍本县和本顿县降雨量少得多,大部分地区低于4英寸(浅褐色)。.

水分短缺的影响还可以从其他方面看出来. 由于最近的降雨,地面更加湿润, 允许水流从 Minnesota River southward在美国,双子城上游的密西西比河仍处于流量最低的四分之一. 在该州北部三分之一的地区,几乎所有的河流和溪流的流量都很短. 这是因为明尼苏达州中西部和北部的大部分地区都超过了 到目前为止,今年的降雨量少了8英寸. Some areas are more than 16 inches short. That's where the extreme drought remains而明尼苏达州中部现在处于中度或严重干旱状态. 8月底开始降雨后,明尼苏达州中部的极端干旱(红色)结束. 严重干旱(棕色)地区在9月份进一步缓解(对比) August 31 to September 28 for Minnesota).

The recent rainfall has left only 31 percent of the near surface soil moisture to be short or very short. 尽管如此,该州仍有超过50%的深层土壤水分不足.

更频繁的降雨确实造成了一批明显的恶劣天气. 直线风和一些短暂的龙卷风袭击了双子城南部地区 morning of September 17. 大多数雷暴只带来了令人满意的降雨.

九月比往年温暖,开花较晚

Temperature-wise, September in St. 云层又变暖了,但这是由于当月下半月异常的温暖. Each of the first 15 days of September were within 4 degrees of average. As the average temperatures cooled, however, 9月底的天气几乎和9月初一样温暖. 9月下半月有5天气温比平均水平高出至少10度. 16日和19日创下了89华氏度的最高纪录. 而且,在本月的最后两天有一对83度的高点. Each came within a degree of breaking a record warm high. September 30 did in fact produce 最低气温60华氏度,平均气温72华氏度. Overall, the 62.6 degrees average was 3.比正常水平高出1度,是2015年以来最热的9月. 这是有记录以来140个九月中第21个最热的九月.

9月没有90度的高温,16日和19日的气温少了1度. That means that St. Cloud had 20 highs of at least 90 degrees追平了2006年和2007年以来的最高纪录. However, the two September 89's meant there were a total of 6 days falling one degree short this summer.

9月22日有一次39度的低潮. 这是圣乔治的温度最接近冰点的时候. Cloud Airport. 然而,在寒冷爆发期间,明尼苏达州中部的其他一些地区也出现了霜冻. So, the first St. 云霜将晚于9月26日的中值日期(见 average last and first frost dates from NOAA via the Minnesota State Climatology Working Group).

9月下旬至10月上旬的干燥天气机率高于平均水平

如上所述,暖流在月底集中. 这与明尼苏达大学的唐·贝克教授的发现相吻合. 他发现,北部平原一年中最有可能出现高压的时间是9月的最后一周和10月的第一周. This particular trend held up this season, 所以婚礼和其他户外计划都要记住这一点.

    September 2021 Statistics

Temperatures (°F)
September 2021
Normal
Average High Temperature (°F)
75.4
71.0
Average Low Temperature (°F)
49.7
48.0
Mean Temperature for September (°F)
63.1
59.5
Temperature Thresholds
Number of Days
Normal
September 2021 Days with High Temperature of At Least 90°F
0
0.99
2021 Total Days with High Temperature of At Least 90°F
20
11.58
September 2021 Days with Low Temperature of 32°F or lower
0
1.70
     
September Temperature Extremes
Temperature(°F)
Date
2021年9月最高气温(°F)
89
September 16,19
2021年9月最冷高温(华氏度)
62
September 3
2021年9月最低温(°F)
67
September 19
2021年9月最低温(华氏度)
39
September 22
Record Temperatures in September 2021
Temperature(°F)
Date
Old Record
Daily Record Warm Average
72
Sept 30
71 set in 1971
Daily Record Warm Low
60
Sept 30
59 set in 1983
Precipitation (in)
This Year
Normal
September 2021 Precipitation (in)
3.82
3.01
圣克劳德十个多雨/最干旱的九月
2021 Growing Season (April 1- September 30) Rainfall (in)
16.34 (-4.29 from average)
20.63
2020 Total Precipitation (in) (January 1 - September 30)
18.09 (-5.54 from average)
23.63
Precipitation Thresholds
Number of Days
Normal
September 2021 Days with Measurable (>= 0.01 inch) Precipitation
9
8.7
September 2021 Days with >= 0.10 inch Precipitation
7
5.6
September 2021 Days with >= 0.25 inch Precipitation
5
3.5
September 2021 Days with >= 0.50 inch Precipitation
3
2.0
September 2021 Days with >= 1.00 inch Precipitation
1
0.8
September Precipitation Extremes
Precipitation (in)
Date
Most Daily Precipitation in September 2021
1.19 inch
September 13
Record Precipitation in September 2021
Precipitation (in)
Date
Old Record
No records set

 

 

历史温度数据由圣克劳德国家气象局提供 NOAA/NWS
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