Record envelope, standing records and threshold days for Prairie du Sac 2 N (USC00476838), Wisconsin, United States, with 101 years of record.
Key Facts for Prairie du Sac 2 N
Prairie du Sac 2 N (USC00476838) is a weather station in Wisconsin, United States at 43.31 latitude and -89.73 longitude, 238 m (780 ft) above sea level.
The station reports from 1908 to 2008, 101 years of record.
1,464 records set at Prairie du Sac 2 N still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Prairie du Sac 2 N set a daily record snow depth of 45.7 cm (18.0 in) on 29 February 2008.
About the Station
Location: Wisconsin, United States, 43.31 latitude, -89.73 longitude.
Elevation: 238 m (780 ft).
Period of record: 1908 to 2008, 101 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Prairie du Sac 2 N. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Prairie du Sac 2 N, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
15.0 C (59.0 F)
-41.1 C (-42.0 F)
n/a
n/a
Feb
17.2 C (63.0 F)
-37.8 C (-36.0 F)
n/a
n/a
Mar
28.9 C (84.0 F)
-33.3 C (-27.9 F)
n/a
n/a
Apr
34.4 C (93.9 F)
-12.8 C (9.0 F)
n/a
n/a
May
38.3 C (100.9 F)
-5.6 C (21.9 F)
n/a
n/a
Jun
40.6 C (105.1 F)
1.7 C (35.1 F)
n/a
n/a
Jul
42.2 C (108.0 F)
7.2 C (45.0 F)
n/a
n/a
Aug
38.9 C (102.0 F)
1.1 C (34.0 F)
n/a
n/a
Sep
38.3 C (100.9 F)
-3.3 C (26.1 F)
n/a
n/a
Oct
32.8 C (91.0 F)
-11.7 C (10.9 F)
n/a
n/a
Nov
25.6 C (78.1 F)
-22.8 C (-9.0 F)
n/a
n/a
Dec
18.3 C (64.9 F)
-30.6 C (-23.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Prairie du Sac 2 N still stand. 1936 holds the most, with 40.
Standing records at Prairie du Sac 2 N by the year they were set
Year set
Standing records
1908
27
1909
27
1910
27
1911
30
1912
24
1913
23
1914
14
1915
25
1916
28
1917
18
1918
12
1919
16
1920
18
1921
27
1922
21
1923
18
1924
13
1925
19
1926
9
1927
13
1928
13
1929
14
1930
21
1931
24
1932
14
1933
17
1934
30
1935
10
1936
40
1937
6
1938
11
1939
12
1940
13
1941
13
1942
18
1943
12
1944
10
1945
15
1946
10
1948
12
1949
8
1950
19
1951
25
1952
9
1953
12
1954
9
1955
9
1956
10
1957
5
1958
7
1959
14
1960
11
1961
8
1962
21
1963
19
1964
14
1965
25
1966
16
1967
15
1968
16
1969
13
1970
6
1971
14
1972
19
1973
9
1974
8
1975
13
1976
15
1977
16
1978
4
1979
7
1980
7
1981
8
1982
15
1983
18
1984
13
1985
15
1986
15
1987
16
1988
16
1989
21
1990
9
1991
21
1992
12
1993
4
1994
19
1995
12
1996
12
1997
7
1998
11
1999
7
2000
10
2001
7
2002
15
2003
12
2004
11
2005
8
2006
8
2007
12
2008
3
All-Time Record Progression
5 new records
5 all-time records were set at Prairie du Sac 2 N between 30 January 1951 and 1 August 2001. Each dot is a new record.
When Prairie du Sac 2 N set new all-time records
Date
Kind
Detail
1951-01-30
Record low minimum temperature
Record low minimum temperature -41.1 C (-42.0 F)
1951-07-21
Record daily precipitation
Record daily precipitation 128.3 mm (5.1 in)
1972-01-15
Record low maximum temperature
Record low maximum temperature -26.1 C (-15.0 F)
1996-08-04
Record high minimum temperature
Record high minimum temperature 28.9 C (84.0 F)
2001-08-01
Record daily precipitation
Record daily precipitation 145.5 mm (5.7 in)
Wettest Day of Each Month
Aug: 145.5 mm (5.7 in)
The wettest day on record for each calendar month at Prairie du Sac 2 N. The most was 145.5 mm (5.7 in) on 1 August 2001.
Record daily precipitation for each month at Prairie du Sac 2 N
Month
Record daily precipitation (mm)
Date
Jan
33.8 mm (1.3 in)
24 January 1938
Feb
50.8 mm (2.0 in)
23 February 1922
Mar
68.6 mm (2.7 in)
31 March 1998
Apr
80.0 mm (3.1 in)
5 April 1999
May
73.2 mm (2.9 in)
13 May 1978
Jun
95.0 mm (3.7 in)
16 June 1920
Jul
128.3 mm (5.1 in)
21 July 1951
Aug
145.5 mm (5.7 in)
1 August 2001
Sep
108.5 mm (4.3 in)
9 September 1965
Oct
70.4 mm (2.8 in)
19 October 1937
Nov
74.4 mm (2.9 in)
4 November 2003
Dec
43.9 mm (1.7 in)
19 December 1968
Period of Record Coverage
1908 to 2008
Complete yearUnder 90 percent of days
101 years of record at Prairie du Sac 2 N, 1908 to 2008. 18 years have data for under 90 percent of days and are left out of rankings: 1908, 1909, 1910, 1911, 1947, 1996, 1997, 1998 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 81 complete years at Prairie du Sac 2 N, 1912 to 1995. Blue stripes are years cooler than the station's own mean of 8.1 C (46.5 F); red stripes are warmer. The coolest year was 1951, at 6.2 C (43.2 F), and the warmest was 1921, at 10.7 C (51.3 F). The strongest colour marks a difference of 2.7 C (4.9 F).
Annual mean temperature at Prairie du Sac 2 N as warming stripes, 1912 to 1995
Year
Annual mean temperature
Difference from the station mean
1912
6.9 C
-1.15 C
1913
8.5 C
+0.41 C
1914
8.7 C
+0.60 C
1915
8.2 C
+0.16 C
1916
8.2 C
+0.11 C
1917
6.6 C
-1.42 C
1918
8.9 C
+0.82 C
1919
9.1 C
+1.04 C
1920
8.7 C
+0.68 C
1921
10.7 C
+2.68 C
1922
9.8 C
+1.78 C
1923
8.3 C
+0.27 C
1924
6.8 C
-1.31 C
1925
8.0 C
-0.04 C
1926
7.3 C
-0.78 C
1927
8.1 C
+0.04 C
1929
6.8 C
-1.31 C
1930
8.7 C
+0.65 C
1931
10.6 C
+2.51 C
1932
8.1 C
+0.07 C
1933
8.7 C
+0.60 C
1934
9.0 C
+0.98 C
1935
7.6 C
-0.51 C
1936
7.2 C
-0.86 C
1937
7.2 C
-0.86 C
1938
9.0 C
+0.91 C
1939
9.3 C
+1.21 C
1940
7.3 C
-0.74 C
1941
9.2 C
+1.13 C
1942
8.3 C
+0.22 C
1943
7.3 C
-0.80 C
1944
8.5 C
+0.39 C
1945
7.2 C
-0.89 C
1946
8.8 C
+0.76 C
1948
8.0 C
-0.07 C
1949
8.4 C
+0.37 C
1950
6.6 C
-1.47 C
1951
6.2 C
-1.82 C
1952
8.3 C
+0.25 C
1953
9.2 C
+1.09 C
1954
8.6 C
+0.57 C
1955
8.3 C
+0.25 C
1956
7.9 C
-0.19 C
1957
8.0 C
-0.04 C
1958
7.8 C
-0.22 C
1959
7.5 C
-0.54 C
1960
8.0 C
-0.04 C
1961
8.3 C
+0.21 C
1962
7.6 C
-0.46 C
1963
7.8 C
-0.28 C
1964
8.7 C
+0.68 C
1965
7.9 C
-0.21 C
1966
7.6 C
-0.47 C
1967
7.3 C
-0.79 C
1968
8.4 C
+0.35 C
1969
7.7 C
-0.40 C
1970
8.0 C
-0.04 C
1971
7.4 C
-0.63 C
1972
6.3 C
-1.72 C
1973
8.8 C
+0.71 C
1974
7.7 C
-0.40 C
1975
7.9 C
-0.13 C
1976
7.0 C
-1.07 C
1978
7.1 C
-0.97 C
1979
7.1 C
-1.00 C
1980
8.0 C
-0.07 C
1981
8.3 C
+0.26 C
1982
7.4 C
-0.65 C
1983
8.4 C
+0.35 C
1984
8.3 C
+0.22 C
1985
7.4 C
-0.69 C
1986
8.3 C
+0.27 C
1987
9.8 C
+1.72 C
1988
8.4 C
+0.34 C
1989
7.3 C
-0.75 C
1990
9.0 C
+0.94 C
1991
8.6 C
+0.52 C
1992
7.9 C
-0.18 C
1993
7.3 C
-0.74 C
1994
7.9 C
-0.17 C
1995
8.1 C
+0.08 C
The fitted trend in annual mean temperature here over 1912 to 1995 is -0.06 C (-0.14 to 0.02) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.10 F (-0.24 to 0.04) per decade. The slope is a straight line fitted to 81 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Prairie du Sac 2 N
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.06 C (-0.14 to 0.02) per decade
-0.10 F (-0.24 to 0.04) per decade
1912 to 1995
81
Not clearly different from zero
Mean daily maximum
-0.06 C (-0.15 to 0.02) per decade
-0.12 F (-0.27 to 0.04) per decade
1912 to 1995
81
Not clearly different from zero
Mean daily minimum
-0.05 C (-0.14 to 0.04) per decade
-0.1 F (-0.3 to 0.1) per decade
1912 to 1995
81
Not clearly different from zero
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1908 to 2008
Yearly extremes at Prairie du Sac 2 N: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.2 C (108.0 F)
1911
36.1 C (97.0 F)
101
Coldest night (TNn)
-41.1 C (-42.0 F)
1951
-28.3 C (-18.9 F)
101
Wettest day (Rx1day)
145.5 mm (5.7 in)
2001
51.3 mm (2.0 in)
101
Wettest five days (Rx5day)
158.8 mm (6.3 in)
1965
80.9 mm (3.2 in)
100
Longest dry spell (CDD)
41 days
1995
23 days
101
Hottest day (TXx)
The hottest day of the year at Prairie du Sac 2 N, 1908 to 2008. The record is 42.2 C (108.0 F) in 1911, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Prairie du Sac 2 N by year
Year
Hottest day (TXx)
1908
38.9 C (102.0 F)
1909
38.3 C (100.9 F)
1910
38.9 C (102.0 F)
1911
42.2 C (108.0 F)
1912
35.6 C (96.1 F)
1913
36.7 C (98.1 F)
1914
36.7 C (98.1 F)
1915
33.3 C (91.9 F)
1916
38.3 C (100.9 F)
1917
37.2 C (99.0 F)
1918
37.2 C (99.0 F)
1919
36.7 C (98.1 F)
1920
35.6 C (96.1 F)
1921
40.0 C (104.0 F)
1922
38.3 C (100.9 F)
1923
36.1 C (97.0 F)
1924
33.9 C (93.0 F)
1925
35.6 C (96.1 F)
1926
36.7 C (98.1 F)
1927
35.6 C (96.1 F)
1928
36.1 C (97.0 F)
1929
34.4 C (93.9 F)
1930
37.2 C (99.0 F)
1931
38.3 C (100.9 F)
1932
36.7 C (98.1 F)
1933
36.7 C (98.1 F)
1934
38.9 C (102.0 F)
1935
36.1 C (97.0 F)
1936
41.7 C (107.1 F)
1937
37.2 C (99.0 F)
1938
33.3 C (91.9 F)
1939
36.7 C (98.1 F)
1940
35.6 C (96.1 F)
1941
37.8 C (100.0 F)
1942
36.7 C (98.1 F)
1943
35.0 C (95.0 F)
1944
35.0 C (95.0 F)
1945
33.3 C (91.9 F)
1946
33.9 C (93.0 F)
1947
2.8 C (37.0 F)
1948
36.1 C (97.0 F)
1949
35.0 C (95.0 F)
1950
31.1 C (88.0 F)
1951
31.1 C (88.0 F)
1952
33.9 C (93.0 F)
1953
36.1 C (97.0 F)
1954
34.4 C (93.9 F)
1955
37.2 C (99.0 F)
1956
33.9 C (93.0 F)
1957
33.9 C (93.0 F)
1958
33.9 C (93.0 F)
1959
34.4 C (93.9 F)
1960
35.0 C (95.0 F)
1961
33.3 C (91.9 F)
1962
32.8 C (91.0 F)
1963
37.2 C (99.0 F)
1964
36.7 C (98.1 F)
1965
38.3 C (100.9 F)
1966
37.2 C (99.0 F)
1967
33.3 C (91.9 F)
1968
34.4 C (93.9 F)
1969
33.9 C (93.0 F)
1970
35.0 C (95.0 F)
1971
33.9 C (93.0 F)
1972
34.4 C (93.9 F)
1973
35.0 C (95.0 F)
1974
36.1 C (97.0 F)
1975
32.8 C (91.0 F)
1976
38.3 C (100.9 F)
1977
37.8 C (100.0 F)
1978
36.7 C (98.1 F)
1979
33.3 C (91.9 F)
1980
36.7 C (98.1 F)
1981
33.9 C (93.0 F)
1982
35.0 C (95.0 F)
1983
36.1 C (97.0 F)
1984
36.1 C (97.0 F)
1985
34.4 C (93.9 F)
1986
35.0 C (95.0 F)
1987
36.1 C (97.0 F)
1988
38.9 C (102.0 F)
1989
37.2 C (99.0 F)
1990
35.0 C (95.0 F)
1991
35.0 C (95.0 F)
1992
33.3 C (91.9 F)
1993
32.2 C (90.0 F)
1994
35.0 C (95.0 F)
1995
39.4 C (102.9 F)
1996
34.4 C (93.9 F)
1997
35.6 C (96.1 F)
1998
33.9 C (93.0 F)
1999
36.7 C (98.1 F)
2000
33.3 C (91.9 F)
2001
36.7 C (98.1 F)
2002
36.7 C (98.1 F)
2003
36.1 C (97.0 F)
2004
32.2 C (90.0 F)
2005
37.2 C (99.0 F)
2006
36.7 C (98.1 F)
2007
36.1 C (97.0 F)
2008
7.8 C (46.0 F)
Coldest night (TNn)
The coldest night of the year at Prairie du Sac 2 N, 1908 to 2008. The record is -41.1 C (-42.0 F) in 1951, marked on the chart; the median year is -28.3 C (-18.9 F).
Coldest night (TNn) at Prairie du Sac 2 N by year
Year
Coldest night (TNn)
1908
-16.1 C (3.0 F)
1909
-31.1 C (-24.0 F)
1910
-35.0 C (-31.0 F)
1911
-31.1 C (-24.0 F)
1912
-36.7 C (-34.1 F)
1913
-28.9 C (-20.0 F)
1914
-30.6 C (-23.1 F)
1915
-31.1 C (-24.0 F)
1916
-30.6 C (-23.1 F)
1917
-33.3 C (-27.9 F)
1918
-36.1 C (-33.0 F)
1919
-32.2 C (-26.0 F)
1920
-28.3 C (-18.9 F)
1921
-25.0 C (-13.0 F)
1922
-27.8 C (-18.0 F)
1923
-27.8 C (-18.0 F)
1924
-31.1 C (-24.0 F)
1925
-27.2 C (-17.0 F)
1926
-26.7 C (-16.1 F)
1927
-26.7 C (-16.1 F)
1928
-23.3 C (-9.9 F)
1929
-37.8 C (-36.0 F)
1930
-32.8 C (-27.0 F)
1931
-21.1 C (-6.0 F)
1932
-25.0 C (-13.0 F)
1933
-31.1 C (-24.0 F)
1934
-25.0 C (-13.0 F)
1935
-30.6 C (-23.1 F)
1936
-34.4 C (-29.9 F)
1937
-25.0 C (-13.0 F)
1938
-23.3 C (-9.9 F)
1939
-20.6 C (-5.1 F)
1940
-29.4 C (-20.9 F)
1941
-24.4 C (-11.9 F)
1942
-29.4 C (-20.9 F)
1943
-31.7 C (-25.1 F)
1944
-24.4 C (-11.9 F)
1945
-25.6 C (-14.1 F)
1946
-28.9 C (-20.0 F)
1947
-7.2 C (19.0 F)
1948
-28.9 C (-20.0 F)
1949
-27.8 C (-18.0 F)
1950
-28.9 C (-20.0 F)
1951
-41.1 C (-42.0 F)
1952
-25.0 C (-13.0 F)
1953
-22.8 C (-9.0 F)
1954
-25.6 C (-14.1 F)
1955
-25.6 C (-14.1 F)
1956
-23.9 C (-11.0 F)
1957
-25.6 C (-14.1 F)
1958
-24.4 C (-11.9 F)
1959
-32.2 C (-26.0 F)
1960
-22.8 C (-9.0 F)
1961
-25.0 C (-13.0 F)
1962
-33.3 C (-27.9 F)
1963
-35.0 C (-31.0 F)
1964
-23.3 C (-9.9 F)
1965
-32.2 C (-26.0 F)
1966
-30.0 C (-22.0 F)
1967
-30.6 C (-23.1 F)
1968
-28.3 C (-18.9 F)
1969
-26.7 C (-16.1 F)
1970
-30.0 C (-22.0 F)
1971
-30.6 C (-23.1 F)
1972
-31.1 C (-24.0 F)
1973
-25.6 C (-14.1 F)
1974
-28.9 C (-20.0 F)
1975
-27.8 C (-18.0 F)
1976
-28.9 C (-20.0 F)
1977
-34.4 C (-29.9 F)
1978
-26.1 C (-15.0 F)
1979
-32.8 C (-27.0 F)
1980
-25.0 C (-13.0 F)
1981
-24.4 C (-11.9 F)
1982
-34.4 C (-29.9 F)
1983
-30.0 C (-22.0 F)
1984
-30.0 C (-22.0 F)
1985
-32.2 C (-26.0 F)
1986
-27.8 C (-18.0 F)
1987
-23.9 C (-11.0 F)
1988
-30.0 C (-22.0 F)
1989
-28.9 C (-20.0 F)
1990
-27.2 C (-17.0 F)
1991
-27.8 C (-18.0 F)
1992
-22.8 C (-9.0 F)
1993
-26.1 C (-15.0 F)
1994
-35.0 C (-31.0 F)
1995
-22.8 C (-9.0 F)
1996
-35.0 C (-31.0 F)
1997
-26.1 C (-15.0 F)
1998
-22.8 C (-9.0 F)
1999
-30.0 C (-22.0 F)
2000
-30.0 C (-22.0 F)
2001
-22.8 C (-9.0 F)
2002
-26.1 C (-15.0 F)
2003
-23.9 C (-11.0 F)
2004
-27.8 C (-18.0 F)
2005
-26.7 C (-16.1 F)
2006
-33.9 C (-29.0 F)
2007
-28.9 C (-20.0 F)
2008
-31.1 C (-24.0 F)
Wettest day (Rx1day)
The wettest day of the year at Prairie du Sac 2 N, 1908 to 2008. The record is 145.5 mm (5.7 in) in 2001, marked on the chart; the median year is 51.3 mm (2.0 in).
Wettest day (Rx1day) at Prairie du Sac 2 N by year
Year
Wettest day (Rx1day)
1908
37.1 mm (1.5 in)
1909
50.0 mm (2.0 in)
1910
36.8 mm (1.4 in)
1911
50.8 mm (2.0 in)
1912
74.2 mm (2.9 in)
1913
65.5 mm (2.6 in)
1914
61.5 mm (2.4 in)
1915
58.4 mm (2.3 in)
1916
99.1 mm (3.9 in)
1917
54.4 mm (2.1 in)
1918
39.9 mm (1.6 in)
1919
53.8 mm (2.1 in)
1920
95.0 mm (3.7 in)
1921
78.2 mm (3.1 in)
1922
50.8 mm (2.0 in)
1923
37.6 mm (1.5 in)
1924
51.3 mm (2.0 in)
1925
91.2 mm (3.6 in)
1926
69.3 mm (2.7 in)
1927
44.5 mm (1.8 in)
1928
49.0 mm (1.9 in)
1929
33.0 mm (1.3 in)
1930
29.2 mm (1.1 in)
1931
59.7 mm (2.4 in)
1932
71.1 mm (2.8 in)
1933
60.5 mm (2.4 in)
1934
61.0 mm (2.4 in)
1935
78.7 mm (3.1 in)
1936
32.0 mm (1.3 in)
1937
70.4 mm (2.8 in)
1938
50.8 mm (2.0 in)
1939
25.7 mm (1.0 in)
1940
61.7 mm (2.4 in)
1941
54.9 mm (2.2 in)
1942
47.8 mm (1.9 in)
1943
48.5 mm (1.9 in)
1944
46.5 mm (1.8 in)
1945
40.9 mm (1.6 in)
1946
43.2 mm (1.7 in)
1947
0.0 mm (0.00 in)
1948
47.0 mm (1.9 in)
1949
47.5 mm (1.9 in)
1950
59.2 mm (2.3 in)
1951
128.3 mm (5.1 in)
1952
43.2 mm (1.7 in)
1953
37.6 mm (1.5 in)
1954
74.2 mm (2.9 in)
1955
37.3 mm (1.5 in)
1956
48.5 mm (1.9 in)
1957
46.0 mm (1.8 in)
1958
32.5 mm (1.3 in)
1959
52.8 mm (2.1 in)
1960
69.1 mm (2.7 in)
1961
77.5 mm (3.1 in)
1962
50.3 mm (2.0 in)
1963
58.2 mm (2.3 in)
1964
42.7 mm (1.7 in)
1965
108.5 mm (4.3 in)
1966
41.1 mm (1.6 in)
1967
61.0 mm (2.4 in)
1968
46.5 mm (1.8 in)
1969
89.7 mm (3.5 in)
1970
47.2 mm (1.9 in)
1971
48.8 mm (1.9 in)
1972
44.2 mm (1.7 in)
1973
51.6 mm (2.0 in)
1974
41.7 mm (1.6 in)
1975
62.0 mm (2.4 in)
1976
57.7 mm (2.3 in)
1977
48.5 mm (1.9 in)
1978
73.2 mm (2.9 in)
1979
42.4 mm (1.7 in)
1980
70.4 mm (2.8 in)
1981
58.7 mm (2.3 in)
1982
40.4 mm (1.6 in)
1983
33.5 mm (1.3 in)
1984
58.4 mm (2.3 in)
1985
73.2 mm (2.9 in)
1986
65.5 mm (2.6 in)
1987
59.9 mm (2.4 in)
1988
48.3 mm (1.9 in)
1989
45.2 mm (1.8 in)
1990
63.0 mm (2.5 in)
1991
51.3 mm (2.0 in)
1992
57.2 mm (2.3 in)
1993
77.7 mm (3.1 in)
1994
51.1 mm (2.0 in)
1995
49.8 mm (2.0 in)
1996
63.5 mm (2.5 in)
1997
44.7 mm (1.8 in)
1998
68.6 mm (2.7 in)
1999
80.0 mm (3.1 in)
2000
83.1 mm (3.3 in)
2001
145.5 mm (5.7 in)
2002
52.6 mm (2.1 in)
2003
74.4 mm (2.9 in)
2004
65.3 mm (2.6 in)
2005
38.6 mm (1.5 in)
2006
45.2 mm (1.8 in)
2007
39.4 mm (1.6 in)
2008
6.1 mm (0.24 in)
Wettest five days (Rx5day)
The wettest five days of the year at Prairie du Sac 2 N, 1908 to 2008. The record is 158.8 mm (6.3 in) in 1965, marked on the chart; the median year is 80.9 mm (3.2 in).
Wettest five days (Rx5day) at Prairie du Sac 2 N by year
Year
Wettest five days (Rx5day)
1908
50.3 mm (2.0 in)
1909
86.8 mm (3.4 in)
1910
36.8 mm (1.4 in)
1911
83.9 mm (3.3 in)
1912
65.1 mm (2.6 in)
1913
102.1 mm (4.0 in)
1914
82.4 mm (3.2 in)
1915
87.1 mm (3.4 in)
1916
128.6 mm (5.1 in)
1917
67.1 mm (2.6 in)
1918
60.2 mm (2.4 in)
1919
64.4 mm (2.5 in)
1920
155.5 mm (6.1 in)
1921
101.9 mm (4.0 in)
1922
95.3 mm (3.8 in)
1923
52.3 mm (2.1 in)
1924
101.6 mm (4.0 in)
1925
92.7 mm (3.6 in)
1926
73.6 mm (2.9 in)
1927
78.8 mm (3.1 in)
1928
69.1 mm (2.7 in)
1929
55.4 mm (2.2 in)
1930
64.5 mm (2.5 in)
1931
66.5 mm (2.6 in)
1932
72.6 mm (2.9 in)
1933
88.4 mm (3.5 in)
1934
81.8 mm (3.2 in)
1935
119.7 mm (4.7 in)
1936
48.1 mm (1.9 in)
1937
89.4 mm (3.5 in)
1938
120.9 mm (4.8 in)
1939
35.4 mm (1.4 in)
1940
80.7 mm (3.2 in)
1941
114.9 mm (4.5 in)
1942
58.3 mm (2.3 in)
1943
53.6 mm (2.1 in)
1944
68.6 mm (2.7 in)
1945
63.5 mm (2.5 in)
1946
58.7 mm (2.3 in)
1947
n/a
1948
61.5 mm (2.4 in)
1949
119.6 mm (4.7 in)
1950
117.8 mm (4.6 in)
1951
131.1 mm (5.2 in)
1952
76.5 mm (3.0 in)
1953
104.6 mm (4.1 in)
1954
157.2 mm (6.2 in)
1955
53.0 mm (2.1 in)
1956
64.0 mm (2.5 in)
1957
55.9 mm (2.2 in)
1958
50.5 mm (2.0 in)
1959
84.1 mm (3.3 in)
1960
93.9 mm (3.7 in)
1961
137.2 mm (5.4 in)
1962
53.8 mm (2.1 in)
1963
87.6 mm (3.4 in)
1964
92.0 mm (3.6 in)
1965
158.8 mm (6.3 in)
1966
74.6 mm (2.9 in)
1967
102.7 mm (4.0 in)
1968
90.1 mm (3.5 in)
1969
136.9 mm (5.4 in)
1970
73.2 mm (2.9 in)
1971
64.0 mm (2.5 in)
1972
61.4 mm (2.4 in)
1973
73.7 mm (2.9 in)
1974
49.7 mm (2.0 in)
1975
83.4 mm (3.3 in)
1976
62.3 mm (2.5 in)
1977
70.8 mm (2.8 in)
1978
129.6 mm (5.1 in)
1979
70.1 mm (2.8 in)
1980
151.4 mm (6.0 in)
1981
91.6 mm (3.6 in)
1982
64.3 mm (2.5 in)
1983
58.6 mm (2.3 in)
1984
101.4 mm (4.0 in)
1985
108.0 mm (4.3 in)
1986
98.5 mm (3.9 in)
1987
84.1 mm (3.3 in)
1988
74.3 mm (2.9 in)
1989
86.6 mm (3.4 in)
1990
82.0 mm (3.2 in)
1991
62.7 mm (2.5 in)
1992
141.6 mm (5.6 in)
1993
123.7 mm (4.9 in)
1994
89.7 mm (3.5 in)
1995
80.6 mm (3.2 in)
1996
47.7 mm (1.9 in)
1997
38.4 mm (1.5 in)
1998
88.6 mm (3.5 in)
1999
126.8 mm (5.0 in)
2000
81.1 mm (3.2 in)
2001
147.5 mm (5.8 in)
2002
80.6 mm (3.2 in)
2003
96.5 mm (3.8 in)
2004
85.3 mm (3.4 in)
2005
68.0 mm (2.7 in)
2006
46.2 mm (1.8 in)
2007
61.8 mm (2.4 in)
2008
8.9 mm (0.35 in)
Longest dry spell (CDD)
The longest dry spell of the year at Prairie du Sac 2 N, 1908 to 2008. The record is 41 days in 1995, marked on the chart; the median year is 23 days.
Longest dry spell (CDD) at Prairie du Sac 2 N by year
Year
Longest dry spell (CDD)
1908
23 days
1909
32 days
1910
32 days
1911
15 days
1912
20 days
1913
25 days
1914
22 days
1915
28 days
1916
37 days
1917
32 days
1918
37 days
1919
37 days
1920
22 days
1921
25 days
1922
30 days
1923
16 days
1924
21 days
1925
24 days
1926
22 days
1927
29 days
1928
17 days
1929
33 days
1930
29 days
1931
20 days
1932
22 days
1933
21 days
1934
35 days
1935
15 days
1936
26 days
1937
14 days
1938
25 days
1939
30 days
1940
23 days
1941
15 days
1942
28 days
1943
26 days
1944
25 days
1945
22 days
1946
18 days
1947
1 day
1948
22 days
1949
25 days
1950
31 days
1951
18 days
1952
30 days
1953
30 days
1954
24 days
1955
27 days
1956
25 days
1957
24 days
1958
32 days
1959
25 days
1960
26 days
1961
23 days
1962
26 days
1963
17 days
1964
24 days
1965
16 days
1966
25 days
1967
23 days
1968
19 days
1969
35 days
1970
28 days
1971
13 days
1972
17 days
1973
15 days
1974
17 days
1975
17 days
1976
33 days
1977
18 days
1978
28 days
1979
19 days
1980
19 days
1981
25 days
1982
24 days
1983
15 days
1984
21 days
1985
14 days
1986
23 days
1987
29 days
1988
37 days
1989
24 days
1990
19 days
1991
23 days
1992
23 days
1993
22 days
1994
23 days
1995
41 days
1996
19 days
1997
12 days
1998
16 days
1999
21 days
2000
16 days
2001
16 days
2002
16 days
2003
16 days
2004
16 days
2005
18 days
2006
20 days
2007
18 days
2008
8 days
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
81 years with a frost
Across 81 years with a frost, the median last spring frost at Prairie du Sac 2 N falls on 26 April and the median first autumn frost on 9 October, which leaves a median of 167 days between them.
In 1965 to 1995 the median growing season was 160 days. That is 14 days fewer than in 1912 to 1942.
Fitted over all years, the growing season changes by -2.1 days per decade at this station.
Frost dates and growing season at Prairie du Sac 2 N
Measure
Median, all years
Earliest period (1912 to 1942)
Recent period (1965 to 1995)
Recent against earliest
Fitted trend
Last spring frost
26 April
25 April
27 April
2 days later
+0.3 days per decade
First autumn frost
9 October
15 October
5 October
10 days earlier
-1.8 days per decade
Growing days
167 days
174 days
160 days
14 days fewer
-2.1 days per decade
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
80 years, 1913 to 1995
A day with at least 52.9 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 114.0 mm (4.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Prairie du Sac 2 N: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
52.9 mm (2.1 in)
5 years
68.2 mm (2.7 in)
10 years
78.7 mm (3.1 in)
25 years
92.5 mm (3.6 in)
50 years
103.1 mm (4.1 in)
100 years
114.0 mm (4.5 in)
Longer than the 80 years of record
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 80 years of values from 1913 to 1995.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 128.3 mm (5.1 in) in 1951; 108.5 mm (4.3 in) in 1965; 99.1 mm (3.9 in) in 1916.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Prairie du Sac 2 N, at 1930. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1930 ran 0.4 C (0.6 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Prairie du Sac 2 N, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1930
-0.3
-0.6
likely
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for Prairie du Sac 2 N standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Prairie du Sac 2 N threshold days by year: CSV or JSON. Field meanings are on the data page.
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-15 (15 October 2026). Records are computed by this site and are not official.