Sioux City, Iowa

January 2006 was a record warm month for Sioux City, Iowa.  Below is a graph showing the daily maximum and minimum temperature for Sioux City.  Also shown is the normal high and low temperature for Sioux City.  There were 8 days where the observed low temperature was warmer than the normal high temperature for the date. 

Click on image to see table of values shown in graph.

The warmest temperature of the month was 64 degrees on January 15 which was a record for the day.  This also ties for the 5th warmest day ever to occur in January temperature in Sioux City.  In addition, a high temperature of 62 on January 26 is tied for the 13th warmest January temperature.

The average January temperature in Sioux City was 33.5 degrees.  This set a record for the warmest average temperature in January and broke the old record by 2.0 degrees.  The graph below shows the top 10 warmest Januarys in Sioux City.

Red indicates 2006 average and yellow is normal.  Click on image to see table of values shown in graph.

Sioux City also set a record for the warmest average minimum temperature in January.  The average minimum temperature was 23.1 degrees and broke the old record of 21.7 degrees set in 1931. January 2006 was 14.6 degrees above the normal low of 8.5 degrees in January.  The average temperature for January 2006 was comparable to the normal low temperature for March 8.

Red indicates 2006 average and yellow is normal.  Click on image to see table of values shown in graph.

Sioux City set a record for the warmest average maximum temperature in January.  The average maximum temperature of 43.8 degrees broke the old record of 42.4 degrees set in 1990.  An average temperature of 38.2 degrees is 15.1 degrees above normal and would be the normal temperature on March 9.

Red indicates 2006 and yellow is normal.  Click on image to see table of values shown in graph.

There are several other interesting facts associated with January 2006.  This was the ninth January on record where the low temperature did not fall below zero.   Normally, there are 8 days in January when the low temperature is below zero.

Dark blue indicates 2006 and grey is normal.  Click on image to see table of values shown in graph.

This was the first January ever recorded when the daily minimum temperature was not less than 10 degrees.  In 1990, 1992, and 1921, the minimum temperature fell below 10 degrees twice.  Normally, Sioux City has a minimum temperature of 10 degrees on 14 days.

Dark blue indicates 2006 and grey is normal.  Click on image to see table of values shown in graph.

Sioux City had the third-most days in recorded history when the low temperature remained above 19 degrees.  For 21 of the 31 days in January, the low temperature was at least 20 degrees.  This is 2 fewer than in 1919 when 23 days had a minimum temperature of at least 20 degrees.  Sioux City normally has 8 days in January with a minimum temperature of at least 20 degrees.

Dark blue indicates 2006 and grey is normal.  Click on image to see table of values shown in graph.

Sioux City also saw the most number of days in January above freezing.  There were 29 days above freezing in January.  This is one more than the previous record of 28 set in 1990.  On average, there are 13 days in January when the temperature rises above freezing.

Dark blue indicates 2006 and grey is normal.  Click on image to see table of values shown in graph.

Table 1. Daily observed high and low temperature and normal high and low
temperature for January 2006 in Sioux City, Iowa.

Date

Observed High

Observed Low 

Normal Low

Normal High

January 1

35

29

9

29

January 2

34

31

8

28

January 3

38

30

8

28

January 4

45

31

8

28

January 5

32

22

8

28

January 6

48

16

8

28

January 7

47

25

8

28

January 8

35

30

8

28

January 9

35

24

8

28

January 10

43

20

8

28

January 11

55

22

8

28

January 12

47

31

8

28

January 13

36

19

8

28

January 14

51

18

8

28

January 15

64

27

8

28

January 16

41

27

8

28

January 17

31

11

8

28

January 18

48

11

8

29

January 19

39

29

8

29

January 20

34

24

8

29

January 21

48

18

8

29

January 22

34

14

9

29

January 23

49

13

9

29

January 24

46

16

9

29

January 25

50

15

9

29

January 26

62

25

9

30

January 27

59

42

9

30

January 28

48

43

10

30

January 29

39

32

10

30

January 30

36

24

10

30

January 31

49

21

11

31

Table II. Top Ten Warmest Average Temperature for
Sioux City, Iowa

Year Average Temperature
2006 33.5
1933 31.5
1931 31.2
1992 30.7
1990 30.4
1989 29.9
1939 29.5
1919 29.2
1921 28.5
1944 28.5
1986 28.0
Normal 18.6

Table III. Top Ten Warmest Minimum Temperature for
Sioux City, Iowa

Year Average Temperature
2006 23.1
1990 21.7
1944 21.6
1931 21.6
1939 20.7
1992 20.7
1919 20.3
1933 19.8
1989 19.3
1921 18.4
2002 18.4
Normal 8.5

 

Table IV. Top Ten Warmest Maximum Temperature for
Sioux City, Iowa

Year Average Temperature
2006 43.8
1990 42.4
1933 41.4
1944 41.0
1931 40.6
1992 40.6
1989 40.4
2002 39.9
1986 38.9
1939 38.3
1919 38.1
Normal 28.7

 

Table V. Fewest Number of January Days
Below Zero in Sioux City, Iowa

Year Average Temperature
1990 0
2006 0
1989 0
1933 0
1923 0
1921 0
1901 0
1898 0
1891 0
2002 1
1992 1
1941 1
1934 1
1914 1
1908 1
Normal 8

 

Table VI. Fewest Number of Days with a
Minimum Temperature of Less Than 10 Degrees
in Sioux City, Iowa

Year Average Temperature
2006 0
1992 2
1990 2
1921 2
1933 3
1923 3
1939 5
1906 5
1891 5
1919 6
1987 6
1998 6
Normal 14

 

Table VII. Greatest Number of Days with a
Minimum Temperature Greater Than 19 Degrees
in Sioux City, Iowa

Year Average Temperature
2006 23
1939 22
1919 21
1942 21
1931 21
1992 19
1933 18
1944 18
1921 18
1986 17
1989 17
Normal 8

Table VIII. Greatest Number of Days with a
Maximum Temperature of Greater Than 32 Degrees
in Sioux City, Iowa

Year Average Temperature
2006 29
1919 28
1992 26
1989 26
1933 26
1944 24
1931 23
1939 23
1986 23
1964 22
1942 21
1923 21
1900 21
Normal 13

 


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