Record envelope, standing records and threshold days for Brookport Dam 52 (USC00110993), Illinois, United States, with 91 years of record.
Key Facts for Brookport Dam 52
Brookport Dam 52 (USC00110993) is a weather station in Illinois, United States at 37.13 latitude and -88.65 longitude, 101 m (330 ft) above sea level.
The station reports from 1928 to 2018, 91 years of record.
1,464 records set at Brookport Dam 52 still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Brookport Dam 52 set a daily record low maximum temperature of 12.8 C (55.0 F) on 12 October 2018.
About the Station
Location: Illinois, United States, 37.13 latitude, -88.65 longitude.
Elevation: 101 m (330 ft).
Period of record: 1928 to 2018, 91 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 Brookport Dam 52. 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 Brookport Dam 52, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
22.8 C (73.0 F)
-29.4 C (-20.9 F)
n/a
n/a
Feb
23.3 C (73.9 F)
-26.7 C (-16.1 F)
n/a
n/a
Mar
28.3 C (82.9 F)
-19.4 C (-2.9 F)
n/a
n/a
Apr
31.7 C (89.1 F)
-6.1 C (21.0 F)
n/a
n/a
May
35.6 C (96.1 F)
0.0 C (32.0 F)
n/a
n/a
Jun
40.6 C (105.1 F)
5.6 C (42.1 F)
n/a
n/a
Jul
40.6 C (105.1 F)
8.9 C (48.0 F)
n/a
n/a
Aug
39.4 C (102.9 F)
5.6 C (42.1 F)
n/a
n/a
Sep
37.2 C (99.0 F)
-1.7 C (28.9 F)
n/a
n/a
Oct
33.3 C (91.9 F)
-7.8 C (18.0 F)
n/a
n/a
Nov
29.4 C (84.9 F)
-12.8 C (9.0 F)
n/a
n/a
Dec
23.3 C (73.9 F)
-25.0 C (-13.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Brookport Dam 52 still stand. 1963 holds the most, with 52.
Standing records at Brookport Dam 52 by the year they were set
Year set
Standing records
1962
36
1963
52
1964
32
1965
35
1966
28
1967
46
1968
21
1969
20
1970
26
1971
34
1972
19
1973
15
1974
33
1975
10
1976
34
1977
25
1978
19
1979
13
1980
39
1981
14
1982
31
1983
41
1984
29
1985
21
1986
34
1987
25
1988
24
1989
34
1990
24
1991
32
1992
18
1993
23
1994
21
1995
15
1996
26
1997
34
1998
24
1999
28
2000
21
2001
22
2002
18
2003
14
2004
14
2005
29
2006
19
2007
28
2008
27
2009
19
2010
23
2011
22
2012
50
2013
18
2014
30
2015
25
2016
18
2017
16
2018
16
All-Time Record Progression
6 new records
6 all-time records were set at Brookport Dam 52 between 17 January 1978 and 21 December 2004. Each dot is a new record.
When Brookport Dam 52 set new all-time records
Date
Kind
Detail
1978-01-17
Record snow depth
Record snow depth 33.0 cm (13.0 in)
1978-01-20
Record snow depth
Record snow depth 38.1 cm (15.0 in)
1989-02-14
Record daily precipitation
Record daily precipitation 135.1 mm (5.3 in)
1994-03-08
Record daily snowfall
Record daily snowfall 25.4 cm (10.0 in)
1999-08-13
Record high minimum temperature
Record high minimum temperature 27.8 C (82.0 F)
2004-12-21
Record daily snowfall
Record daily snowfall 33.0 cm (13.0 in)
Wettest Day of Each Month
Feb: 135.1 mm (5.3 in)
The wettest day on record for each calendar month at Brookport Dam 52. The most was 135.1 mm (5.3 in) on 14 February 1989.
Record daily precipitation for each month at Brookport Dam 52
Month
Record daily precipitation (mm)
Date
Jan
132.6 mm (5.2 in)
25 January 1949
Feb
135.1 mm (5.3 in)
14 February 1989
Mar
117.9 mm (4.6 in)
31 March 1938
Apr
132.1 mm (5.2 in)
30 April 1983
May
113.3 mm (4.5 in)
11 May 1943
Jun
107.4 mm (4.2 in)
8 June 1979
Jul
95.5 mm (3.8 in)
16 July 1958
Aug
116.1 mm (4.6 in)
23 August 1942
Sep
110.5 mm (4.4 in)
20 September 1932
Oct
88.9 mm (3.5 in)
7 October 1998
Nov
113.0 mm (4.4 in)
22 November 1934
Dec
101.6 mm (4.0 in)
22 December 2013
Period of Record Coverage
1962 to 2018
Complete yearUnder 90 percent of days
57 years of record at Brookport Dam 52, 1962 to 2018. 13 years have data for under 90 percent of days and are left out of rankings: 1962, 1978, 1991, 2001, 2006, 2008, 2011, 2012 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 41 complete years at Brookport Dam 52, 1963 to 2015. Blue stripes are years cooler than the station's own mean of 14.2 C (57.6 F); red stripes are warmer. The coolest year was 2014, at 12.6 C (54.7 F), and the warmest was 1998, at 15.9 C (60.5 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Brookport Dam 52 as warming stripes, 1963 to 2015
Year
Annual mean temperature
Difference from the station mean
1963
13.4 C
-0.77 C
1965
14.7 C
+0.50 C
1966
13.8 C
-0.43 C
1967
14.0 C
-0.23 C
1968
13.8 C
-0.38 C
1969
14.1 C
-0.10 C
1970
14.4 C
+0.17 C
1971
14.7 C
+0.47 C
1972
13.9 C
-0.35 C
1973
15.1 C
+0.85 C
1974
14.5 C
+0.33 C
1975
14.7 C
+0.46 C
1976
13.8 C
-0.38 C
1977
14.4 C
+0.19 C
1979
13.1 C
-1.10 C
1980
14.1 C
-0.15 C
1981
13.9 C
-0.30 C
1982
13.9 C
-0.31 C
1984
13.7 C
-0.51 C
1985
13.8 C
-0.44 C
1986
14.5 C
+0.29 C
1987
15.1 C
+0.86 C
1988
13.9 C
-0.29 C
1989
13.4 C
-0.82 C
1990
14.9 C
+0.69 C
1992
14.0 C
-0.22 C
1993
13.7 C
-0.53 C
1994
13.5 C
-0.73 C
1996
13.5 C
-0.67 C
1997
13.6 C
-0.62 C
1998
15.9 C
+1.65 C
1999
15.8 C
+1.60 C
2000
15.0 C
+0.74 C
2002
15.2 C
+0.96 C
2004
14.9 C
+0.65 C
2005
15.5 C
+1.24 C
2007
14.5 C
+0.33 C
2009
13.4 C
-0.79 C
2010
13.9 C
-0.32 C
2014
12.6 C
-1.62 C
2015
14.2 C
+0.02 C
The fitted trend in annual mean temperature here over 1963 to 2015 is 0.04 C (-0.12 to 0.19) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.2 to 0.3) per decade. The slope is a straight line fitted to 41 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Brookport Dam 52
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.04 C (-0.12 to 0.19) per decade
0.1 F (-0.2 to 0.3) per decade
1963 to 2015
41
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.2 to 0.1) per decade
-0.1 F (-0.4 to 0.2) per decade
1963 to 2015
41
Not clearly different from zero
Mean daily minimum
0.14 C (-0.04 to 0.32) per decade
0.3 F (-0.1 to 0.6) per decade
1963 to 2015
41
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
1928 to 2018
Yearly extremes at Brookport Dam 52: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.6 C (105.1 F)
1966
37.2 C (99.0 F)
57
Coldest night (TNn)
-29.4 C (-20.9 F)
1984
-17.8 C (0.0 F)
57
Wettest day (Rx1day)
135.1 mm (5.3 in)
1989
76.2 mm (3.0 in)
91
Wettest five days (Rx5day)
277.2 mm (10.9 in)
1983
117.6 mm (4.6 in)
91
Longest dry spell (CDD)
54 days
1998
19 days
91
Hottest day (TXx)
The hottest day of the year at Brookport Dam 52, 1928 to 2018. The record is 40.6 C (105.1 F) in 1966, marked on the chart; the median year is 37.2 C (99.0 F).
Hottest day (TXx) at Brookport Dam 52 by year
Year
Hottest day (TXx)
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
n/a
1933
n/a
1934
n/a
1935
n/a
1936
n/a
1937
n/a
1938
n/a
1939
n/a
1940
n/a
1941
n/a
1942
n/a
1943
n/a
1944
n/a
1945
n/a
1946
n/a
1947
n/a
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
37.8 C (100.0 F)
1963
36.1 C (97.0 F)
1964
38.9 C (102.0 F)
1965
39.4 C (102.9 F)
1966
40.6 C (105.1 F)
1967
35.0 C (95.0 F)
1968
37.8 C (100.0 F)
1969
36.7 C (98.1 F)
1970
38.3 C (100.9 F)
1971
37.8 C (100.0 F)
1972
35.0 C (95.0 F)
1973
35.6 C (96.1 F)
1974
37.8 C (100.0 F)
1975
35.0 C (95.0 F)
1976
36.7 C (98.1 F)
1977
36.7 C (98.1 F)
1978
37.8 C (100.0 F)
1979
35.6 C (96.1 F)
1980
39.4 C (102.9 F)
1981
35.6 C (96.1 F)
1982
37.8 C (100.0 F)
1983
38.3 C (100.9 F)
1984
36.1 C (97.0 F)
1985
38.3 C (100.9 F)
1986
37.2 C (99.0 F)
1987
37.2 C (99.0 F)
1988
38.3 C (100.9 F)
1989
33.9 C (93.0 F)
1990
37.2 C (99.0 F)
1991
36.7 C (98.1 F)
1992
33.9 C (93.0 F)
1993
37.2 C (99.0 F)
1994
38.3 C (100.9 F)
1995
35.6 C (96.1 F)
1996
34.4 C (93.9 F)
1997
37.2 C (99.0 F)
1998
36.1 C (97.0 F)
1999
40.6 C (105.1 F)
2000
39.4 C (102.9 F)
2001
37.2 C (99.0 F)
2002
38.9 C (102.0 F)
2003
36.1 C (97.0 F)
2004
35.0 C (95.0 F)
2005
37.2 C (99.0 F)
2006
35.6 C (96.1 F)
2007
39.4 C (102.9 F)
2008
35.6 C (96.1 F)
2009
35.0 C (95.0 F)
2010
38.9 C (102.0 F)
2011
37.2 C (99.0 F)
2012
40.6 C (105.1 F)
2013
35.0 C (95.0 F)
2014
35.0 C (95.0 F)
2015
36.1 C (97.0 F)
2016
36.7 C (98.1 F)
2017
35.6 C (96.1 F)
2018
36.7 C (98.1 F)
Coldest night (TNn)
The coldest night of the year at Brookport Dam 52, 1928 to 2018. The record is -29.4 C (-20.9 F) in 1984, marked on the chart; the median year is -17.8 C (0.0 F).
Coldest night (TNn) at Brookport Dam 52 by year
Year
Coldest night (TNn)
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
n/a
1933
n/a
1934
n/a
1935
n/a
1936
n/a
1937
n/a
1938
n/a
1939
n/a
1940
n/a
1941
n/a
1942
n/a
1943
n/a
1944
n/a
1945
n/a
1946
n/a
1947
n/a
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
-21.7 C (-7.1 F)
1963
-22.8 C (-9.0 F)
1964
-19.4 C (-2.9 F)
1965
-20.0 C (-4.0 F)
1966
-19.4 C (-2.9 F)
1967
-17.8 C (0.0 F)
1968
-18.9 C (-2.0 F)
1969
-13.3 C (8.1 F)
1970
-22.8 C (-9.0 F)
1971
-15.6 C (3.9 F)
1972
-17.8 C (0.0 F)
1973
-15.6 C (3.9 F)
1974
-13.9 C (7.0 F)
1975
-11.1 C (12.0 F)
1976
-18.9 C (-2.0 F)
1977
-27.2 C (-17.0 F)
1978
-20.0 C (-4.0 F)
1979
-20.0 C (-4.0 F)
1980
-17.8 C (0.0 F)
1981
-17.8 C (0.0 F)
1982
-28.9 C (-20.0 F)
1983
-23.9 C (-11.0 F)
1984
-29.4 C (-20.9 F)
1985
-26.7 C (-16.1 F)
1986
-17.8 C (0.0 F)
1987
-14.4 C (6.1 F)
1988
-16.7 C (1.9 F)
1989
-25.0 C (-13.0 F)
1990
-13.3 C (8.1 F)
1991
-11.7 C (10.9 F)
1992
-12.2 C (10.0 F)
1993
-15.6 C (3.9 F)
1994
-25.6 C (-14.1 F)
1995
-17.2 C (1.0 F)
1996
-15.6 C (3.9 F)
1997
-18.3 C (-0.9 F)
1998
-12.8 C (9.0 F)
1999
-12.8 C (9.0 F)
2000
-15.6 C (3.9 F)
2001
-15.0 C (5.0 F)
2002
-12.8 C (9.0 F)
2003
-22.2 C (-8.0 F)
2004
-21.1 C (-6.0 F)
2005
-12.8 C (9.0 F)
2006
-15.0 C (5.0 F)
2007
-13.3 C (8.1 F)
2008
-13.9 C (7.0 F)
2009
-17.8 C (0.0 F)
2010
-16.7 C (1.9 F)
2011
-20.0 C (-4.0 F)
2012
-8.3 C (17.1 F)
2013
-13.3 C (8.1 F)
2014
-17.2 C (1.0 F)
2015
-26.7 C (-16.1 F)
2016
-13.9 C (7.0 F)
2017
-13.3 C (8.1 F)
2018
-18.3 C (-0.9 F)
Wettest day (Rx1day)
The wettest day of the year at Brookport Dam 52, 1928 to 2018. The record is 135.1 mm (5.3 in) in 1989, marked on the chart; the median year is 76.2 mm (3.0 in).
Wettest day (Rx1day) at Brookport Dam 52 by year
Year
Wettest day (Rx1day)
1928
61.0 mm (2.4 in)
1929
71.6 mm (2.8 in)
1930
61.0 mm (2.4 in)
1931
66.0 mm (2.6 in)
1932
110.5 mm (4.4 in)
1933
68.1 mm (2.7 in)
1934
113.0 mm (4.4 in)
1935
90.2 mm (3.6 in)
1936
76.2 mm (3.0 in)
1937
95.3 mm (3.8 in)
1938
117.9 mm (4.6 in)
1939
78.7 mm (3.1 in)
1940
50.8 mm (2.0 in)
1941
81.8 mm (3.2 in)
1942
119.4 mm (4.7 in)
1943
113.3 mm (4.5 in)
1944
90.7 mm (3.6 in)
1945
106.2 mm (4.2 in)
1946
79.8 mm (3.1 in)
1947
47.0 mm (1.9 in)
1948
87.9 mm (3.5 in)
1949
132.6 mm (5.2 in)
1950
88.9 mm (3.5 in)
1951
84.3 mm (3.3 in)
1952
69.3 mm (2.7 in)
1953
46.2 mm (1.8 in)
1954
87.6 mm (3.4 in)
1955
60.5 mm (2.4 in)
1956
69.1 mm (2.7 in)
1957
85.6 mm (3.4 in)
1958
95.5 mm (3.8 in)
1959
58.4 mm (2.3 in)
1960
52.8 mm (2.1 in)
1961
77.5 mm (3.1 in)
1962
108.2 mm (4.3 in)
1963
51.8 mm (2.0 in)
1964
55.9 mm (2.2 in)
1965
109.2 mm (4.3 in)
1966
88.6 mm (3.5 in)
1967
77.5 mm (3.1 in)
1968
78.7 mm (3.1 in)
1969
74.9 mm (2.9 in)
1970
59.7 mm (2.4 in)
1971
59.7 mm (2.4 in)
1972
61.7 mm (2.4 in)
1973
91.4 mm (3.6 in)
1974
42.7 mm (1.7 in)
1975
81.5 mm (3.2 in)
1976
70.4 mm (2.8 in)
1977
61.2 mm (2.4 in)
1978
61.2 mm (2.4 in)
1979
107.4 mm (4.2 in)
1980
76.2 mm (3.0 in)
1981
70.1 mm (2.8 in)
1982
72.9 mm (2.9 in)
1983
132.1 mm (5.2 in)
1984
72.9 mm (2.9 in)
1985
90.2 mm (3.6 in)
1986
60.7 mm (2.4 in)
1987
73.2 mm (2.9 in)
1988
96.5 mm (3.8 in)
1989
135.1 mm (5.3 in)
1990
80.0 mm (3.1 in)
1991
50.8 mm (2.0 in)
1992
62.2 mm (2.4 in)
1993
58.4 mm (2.3 in)
1994
48.0 mm (1.9 in)
1995
62.2 mm (2.4 in)
1996
86.4 mm (3.4 in)
1997
91.4 mm (3.6 in)
1998
88.9 mm (3.5 in)
1999
58.4 mm (2.3 in)
2000
82.0 mm (3.2 in)
2001
88.9 mm (3.5 in)
2002
83.6 mm (3.3 in)
2003
69.9 mm (2.8 in)
2004
59.2 mm (2.3 in)
2005
67.1 mm (2.6 in)
2006
98.6 mm (3.9 in)
2007
81.3 mm (3.2 in)
2008
105.2 mm (4.1 in)
2009
74.4 mm (2.9 in)
2010
53.8 mm (2.1 in)
2011
97.8 mm (3.9 in)
2012
76.2 mm (3.0 in)
2013
104.1 mm (4.1 in)
2014
62.2 mm (2.4 in)
2015
82.6 mm (3.3 in)
2016
58.7 mm (2.3 in)
2017
63.5 mm (2.5 in)
2018
66.0 mm (2.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Brookport Dam 52, 1928 to 2018. The record is 277.2 mm (10.9 in) in 1983, marked on the chart; the median year is 117.6 mm (4.6 in).
Wettest five days (Rx5day) at Brookport Dam 52 by year
Year
Wettest five days (Rx5day)
1928
62.3 mm (2.5 in)
1929
81.5 mm (3.2 in)
1930
127.8 mm (5.0 in)
1931
75.9 mm (3.0 in)
1932
143.5 mm (5.6 in)
1933
106.1 mm (4.2 in)
1934
127.2 mm (5.0 in)
1935
144.8 mm (5.7 in)
1936
102.6 mm (4.0 in)
1937
273.2 mm (10.8 in)
1938
147.1 mm (5.8 in)
1939
149.9 mm (5.9 in)
1940
66.3 mm (2.6 in)
1941
101.6 mm (4.0 in)
1942
132.1 mm (5.2 in)
1943
150.9 mm (5.9 in)
1944
104.3 mm (4.1 in)
1945
152.5 mm (6.0 in)
1946
91.2 mm (3.6 in)
1947
65.1 mm (2.6 in)
1948
124.0 mm (4.9 in)
1949
186.8 mm (7.4 in)
1950
156.0 mm (6.1 in)
1951
145.3 mm (5.7 in)
1952
109.8 mm (4.3 in)
1953
80.3 mm (3.2 in)
1954
90.4 mm (3.6 in)
1955
98.6 mm (3.9 in)
1956
117.6 mm (4.6 in)
1957
142.8 mm (5.6 in)
1958
136.5 mm (5.4 in)
1959
110.5 mm (4.4 in)
1960
104.1 mm (4.1 in)
1961
136.9 mm (5.4 in)
1962
161.3 mm (6.4 in)
1963
86.5 mm (3.4 in)
1964
59.5 mm (2.3 in)
1965
120.9 mm (4.8 in)
1966
141.4 mm (5.6 in)
1967
95.8 mm (3.8 in)
1968
117.1 mm (4.6 in)
1969
126.8 mm (5.0 in)
1970
106.9 mm (4.2 in)
1971
103.4 mm (4.1 in)
1972
92.2 mm (3.6 in)
1973
177.3 mm (7.0 in)
1974
67.9 mm (2.7 in)
1975
107.6 mm (4.2 in)
1976
93.0 mm (3.7 in)
1977
91.6 mm (3.6 in)
1978
122.2 mm (4.8 in)
1979
131.0 mm (5.2 in)
1980
77.0 mm (3.0 in)
1981
116.8 mm (4.6 in)
1982
132.9 mm (5.2 in)
1983
277.2 mm (10.9 in)
1984
140.9 mm (5.5 in)
1985
137.2 mm (5.4 in)
1986
164.9 mm (6.5 in)
1987
132.7 mm (5.2 in)
1988
136.2 mm (5.4 in)
1989
234.4 mm (9.2 in)
1990
143.0 mm (5.6 in)
1991
58.9 mm (2.3 in)
1992
87.6 mm (3.4 in)
1993
109.7 mm (4.3 in)
1994
75.0 mm (3.0 in)
1995
103.3 mm (4.1 in)
1996
130.9 mm (5.2 in)
1997
222.5 mm (8.8 in)
1998
120.7 mm (4.8 in)
1999
101.4 mm (4.0 in)
2000
117.6 mm (4.6 in)
2001
135.1 mm (5.3 in)
2002
114.8 mm (4.5 in)
2003
109.2 mm (4.3 in)
2004
97.7 mm (3.8 in)
2005
109.5 mm (4.3 in)
2006
147.7 mm (5.8 in)
2007
109.9 mm (4.3 in)
2008
146.4 mm (5.8 in)
2009
90.9 mm (3.6 in)
2010
101.3 mm (4.0 in)
2011
223.5 mm (8.8 in)
2012
78.5 mm (3.1 in)
2013
133.5 mm (5.3 in)
2014
97.3 mm (3.8 in)
2015
133.4 mm (5.3 in)
2016
128.7 mm (5.1 in)
2017
130.5 mm (5.1 in)
2018
157.4 mm (6.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Brookport Dam 52, 1928 to 2018. The record is 54 days in 1998, marked on the chart; the median year is 19 days.
Longest dry spell (CDD) at Brookport Dam 52 by year
Year
Longest dry spell (CDD)
1928
17 days
1929
12 days
1930
27 days
1931
22 days
1932
16 days
1933
18 days
1934
41 days
1935
19 days
1936
23 days
1937
16 days
1938
29 days
1939
37 days
1940
27 days
1941
21 days
1942
16 days
1943
25 days
1944
30 days
1945
15 days
1946
23 days
1947
19 days
1948
19 days
1949
14 days
1950
13 days
1951
27 days
1952
27 days
1953
27 days
1954
21 days
1955
21 days
1956
18 days
1957
23 days
1958
17 days
1959
15 days
1960
14 days
1961
17 days
1962
14 days
1963
44 days
1964
48 days
1965
36 days
1966
24 days
1967
15 days
1968
24 days
1969
23 days
1970
16 days
1971
15 days
1972
12 days
1973
15 days
1974
15 days
1975
16 days
1976
25 days
1977
30 days
1978
17 days
1979
15 days
1980
24 days
1981
17 days
1982
14 days
1983
39 days
1984
13 days
1985
16 days
1986
18 days
1987
20 days
1988
25 days
1989
15 days
1990
14 days
1991
14 days
1992
19 days
1993
18 days
1994
14 days
1995
36 days
1996
20 days
1997
18 days
1998
54 days
1999
35 days
2000
30 days
2001
18 days
2002
22 days
2003
16 days
2004
42 days
2005
26 days
2006
17 days
2007
23 days
2008
34 days
2009
18 days
2010
26 days
2011
16 days
2012
21 days
2013
21 days
2014
21 days
2015
15 days
2016
25 days
2017
18 days
2018
15 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
41 years with a frost
Across 41 years with a frost, the median last spring frost at Brookport Dam 52 falls on 7 April and the median first autumn frost on 26 October, which leaves a median of 203 days between them.
Fitted over all years, the growing season changes by +2.1 days per decade at this station.
Frost dates and growing season at Brookport Dam 52
Measure
Median, all years
Earliest period
Recent period (1975 to 2015)
Recent against earliest
Fitted trend
Last spring frost
7 April
n/a
8 April
n/a
+0.2 days per decade
First autumn frost
26 October
n/a
26 October
n/a
+2.2 days per decade
Growing days
203 days
n/a
202 days
n/a
+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
81 years, 1929 to 2014
A day with at least 75.7 mm (3.0 in) of rain is expected about once in 2 years. A day with at least 143.7 mm (5.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Brookport Dam 52: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
75.7 mm (3.0 in)
5 years
95.2 mm (3.7 in)
10 years
107.6 mm (4.2 in)
25 years
122.6 mm (4.8 in)
50 years
133.3 mm (5.2 in)
100 years
143.7 mm (5.7 in)
Longer than the 81 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, 81 years of values from 1929 to 2014.
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: 135.1 mm (5.3 in) in 1989; 132.6 mm (5.2 in) in 1949; 132.1 mm (5.2 in) in 1983.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Brookport Dam 52 standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Brookport Dam 52 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.