Joe's Corner

THE DECADE OF THE 1980S

 

AVERAGE YEARLY TEMPERATURE

AVERAGE SUMMER TEMPERATURE

AVERAGE WINTER TEMPERATURE

TOTAL PRECIPITATION FOR THE YEAR

1980

46.3 DEGREES

71.4 DEGREES

21.1 DEGREES

13.82 INCHES

1981

48.7 DEGREES

72.3 DEGREES

23.2 DEGREES

18.11 INCHES

1982

44.3 DEGREES

69.4 DEGREES

14.0 DEGREES

33.26 INCHES

1983

45.7 DEGREES

74.0 DEGREES

23.6 DEGREES

26.77 INCHES

1984

46.0 DEGREES

72.0 DEGREES

15.8 DEGREES

29.64 INCHES

1985

43.6 DEGREES

67.3 DEGREES

17.9 DEGREES

27.16 INCHES

1986

46.2 DEGREES

70.4 DEGREES

15.7 DEGREES

30.50 INCHES

1987

49.9 DEGREES

72.4 DEGREES

27.3 DEGREES

18.66 INCHES

1988

47.0 DEGREES

76.2 DEGREES

16.3 DEGREES

19.14 INCHES

1989

44.8 DEGREES

72.1 DEGREES

18.9 DEGREES

15.79 INCHES

 

 

NUMBER OF DAYS 90 DEGREES OR MORE

NUMBER OF DAYS 100 DEGREES OR MORE

NUMBER OF DAYS 0 DEGREES OR LESS

NUMBER OF DAYS -10 DEGREES OR LESS

1980

25

1

24

7

1981

20

1

23

6

1982

12

1

36

18

1983

40

1

33

11

1984

20

1

22

7

1985

14

0

49

20

1986

13

0

20

7

1987

36

2

7

3

1988

43

14

31

18

1989

25

2

38

21

The decade of the 1980s was the third warmest decade of the 20th century with an average temperature of 46.3 degrees. The average summer temperature during the decade was 71.8 degrees - the second warmest summers of this century. The average winter temperature for the decade of 19.4 degrees was slightly above average. Some of the coolest average temperatures this century occurred in 1985, with the coolest autumn season of the 20th century (41.8 degrees) and 4th coolest summer (67.3 degrees). Not surprisingly, three months in 1985 were amongst the coldest this century - November, with an average temperature of 20.7 degrees was the coldest this century, December, with an average temperature of 9.5 degrees was the 3rd coldest, and August, with an average temperature of 66.3 degrees, was the 3rd coldest. Other top 5 coldest months include the coldest December of the century in 1983 with an average temperature of 2.1 degrees. August 1986 had an average temperature of 66.5 degrees which was the 4th coldest this century and the fourth coldest October of the century occurred in 1987 with an average temperature of 43.9 degrees. The decade also experienced several warm periods. First, the decade saw the third most number of days above 100 degrees (23). This was mostly because of the summer of 1988 which had 14 days above 100 degrees - second most this century and, with an average temperature 76.2 degrees, the second warmest of the century. One of these days included the warmest June day this century - 110 degrees on June 21 - which also tied for the warmest day of any month this century. June 1988 was also the warmest this century with an average temperature of 76.3 degrees. Finally, the 43 days of 90 degree days during 1988 was the 4th most this century. Also, the third warmest August of the century occurred in 1983 with an average temperature of 78.3 degrees. Looking at the winter season, the winter of 1986-87 had an average temperature of 27.3 degrees, the third warmest winter this century. Only 9 days that winter were zero degrees or colder - the third fewest number of days this century. That winter also boasts the third warmest February of the century with an average temperature of 32.8 degrees. Finally, 1987 was the 4th warmest year of the century with an average temperature of 49.9 degrees. The warmest January day of the 20th century occurred on the January 24, 1981 with a high of 66 degrees. The warmest February day of the century at 70 degrees occurred on February 17, 1981 and February 22, 1982.

The driest decade of the 20th century occurred in the 80s with 232.85 inches of precipitation. Two of the five driest years on record were recorded - 13.82 inches of precipitation in 1980 (2nd driest), and 15.79 inches in 1989 (4th driest). Despite being so dry, neither year boasts an individual month that was amongst the 5 driest this century. However, other years experienced very dry months. In addition to being hot, the summer of 1988 was very dry. June 1988 saw only 0.91 inches of rain, the second driest June this century while the 0.49 inches of rain in July 1988 made it the fourth driest July of the century. Other notable dry months include April 1987 where the 0.28 inches of precipitation made it the third driest of the century and May 1981 was the third driest with 0.61 inches of rain. As for wet months, only two months in the decade were amongst the top 5 wettest during the century - the wettest June of the century was in 1984 when 8.43 inches of rain fell and the wettest September of the century was in 1986 with 9.26 inches of rain. Many of the snowiest months of the century occurred during the decade - September 1985 with 0.9 inches of snow was the snowiest September. All of that snow fell on September 28. Two months later 21.9 inches of snow fell which was the snowiest November of the century. Finally April 1983 had 18.4 inches of snow - the most for any April this century. Two of the snowiest winters occurred in consecutive seasons when 70.5 inches fell during winter 1982-83 and 75.0 inches during winter 1983-84. They rank as the fourth and third snowiest winters, respectively, for the century. Significant snowstorms of the decade include 12.1 inches on January 18-20 1988, 10.5 inches March 3-4 1984, 11.0 inches November 27-28 1983 and 12.5 inches December 27-28 1982.

One of the more vigorous thunderstorms of the century hit Sioux Falls during the afternoon of July 6, 1982. Thunderstorm wind gusts estimated at 125 mph uprooted trees and blew over several semi-trailer trucks and cars. The worst damage occurred in parts of south central and northeast sections of the city. Ten injuries were reported in the storm. A peak wind gust to 82 mph was recorded at the National Weather Service office located at the airport.

On December 22, 1989 the highest sea-level pressure of 31.08 inches occurred.


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