Record envelope, standing records and threshold days for Decatur 1 N (USC00122096), Indiana, United States, with 96 years of record.
Key Facts for Decatur 1 N
Decatur 1 N (USC00122096) is a weather station in Indiana, United States at 40.85 latitude and -84.93 longitude, 239 m (785 ft) above sea level.
The station reports from 1931 to 2026, 96 years of record.
1,464 records set at Decatur 1 N still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Decatur 1 N set a daily record precipitation of 64.8 mm (2.6 in) on 11 August 2026.
About the Station
Location: Indiana, United States, 40.85 latitude, -84.93 longitude.
Elevation: 239 m (785 ft).
Period of record: 1931 to 2026, 96 years.
Eligible elements: prcp, snow, snwd.
Daily Record Envelope and 2026
34 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 Decatur 1 N. The lines show the 2026 daily maximum and minimum. 34 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Decatur 1 N, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
18.9 C (66.0 F)
-28.9 C (-20.0 F)
17.2 C (63.0 F)
-22.2 C (-8.0 F)
Feb
22.8 C (73.0 F)
-28.3 C (-18.9 F)
19.4 C (66.9 F)
-23.3 C (-9.9 F)
Mar
30.6 C (87.1 F)
-19.4 C (-2.9 F)
27.2 C (81.0 F)
-7.8 C (18.0 F)
Apr
29.4 C (84.9 F)
-8.9 C (16.0 F)
28.3 C (82.9 F)
-2.8 C (27.0 F)
May
35.6 C (96.1 F)
-2.8 C (27.0 F)
31.1 C (88.0 F)
-0.6 C (30.9 F)
Jun
38.9 C (102.0 F)
4.4 C (39.9 F)
34.4 C (93.9 F)
8.3 C (46.9 F)
Jul
38.3 C (100.9 F)
5.6 C (42.1 F)
35.0 C (95.0 F)
10.6 C (51.1 F)
Aug
35.6 C (96.1 F)
4.4 C (39.9 F)
31.1 C (88.0 F)
10.0 C (50.0 F)
Sep
35.6 C (96.1 F)
1.1 C (34.0 F)
34.4 C (93.9 F)
6.1 C (43.0 F)
Oct
32.2 C (90.0 F)
-3.9 C (25.0 F)
28.3 C (82.9 F)
4.4 C (39.9 F)
Nov
26.1 C (79.0 F)
-15.0 C (5.0 F)
n/a
n/a
Dec
20.6 C (69.1 F)
-24.4 C (-11.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Decatur 1 N still stand. 2012 holds the most, with 93.
Standing records at Decatur 1 N by the year they were set
Year set
Standing records
1972
26
1973
7
1974
7
1976
44
1977
10
1978
16
1979
25
1980
12
1981
1
2005
23
2006
70
2007
75
2008
70
2009
57
2010
48
2011
55
2012
93
2013
68
2014
90
2015
74
2016
52
2017
73
2018
66
2019
45
2020
37
2021
52
2022
50
2023
53
2024
56
2025
63
2026
46
All-Time Record Progression
8 new records
8 all-time records were set at Decatur 1 N between 27 January 1978 and 21 August 2007. Each dot is a new record.
When Decatur 1 N set new all-time records
Date
Kind
Detail
1978-01-27
Record snow depth
Record snow depth 55.9 cm (22.0 in)
1978-01-31
Record snow depth
Record snow depth 58.4 cm (23.0 in)
1978-02-05
Record snow depth
Record snow depth 61.0 cm (24.0 in)
1978-02-06
Record snow depth
Record snow depth 63.5 cm (25.0 in)
1982-02-04
Record daily snowfall
Record daily snowfall 26.7 cm (10.5 in)
1982-02-09
Record snow depth
Record snow depth 68.6 cm (27.0 in)
2007-02-14
Record daily snowfall
Record daily snowfall 30.5 cm (12.0 in)
2007-08-21
Record daily precipitation
Record daily precipitation 129.3 mm (5.1 in)
Wettest Day of Each Month
Aug: 129.3 mm (5.1 in)
The wettest day on record for each calendar month at Decatur 1 N. The most was 129.3 mm (5.1 in) on 21 August 2007.
Record daily precipitation for each month at Decatur 1 N
Month
Record daily precipitation (mm)
Date
Jan
66.3 mm (2.6 in)
4 January 1950
Feb
77.7 mm (3.1 in)
10 February 1959
Mar
61.5 mm (2.4 in)
31 March 1938
Apr
103.1 mm (4.1 in)
29 April 2020
May
82.6 mm (3.3 in)
22 May 1949
Jun
95.8 mm (3.8 in)
12 June 2004
Jul
114.6 mm (4.5 in)
17 July 1943
Aug
129.3 mm (5.1 in)
21 August 2007
Sep
72.9 mm (2.9 in)
17 September 1969
Oct
100.6 mm (4.0 in)
9 October 1950
Nov
86.9 mm (3.4 in)
26 November 1950
Dec
100.8 mm (4.0 in)
10 December 2008
Period of Record Coverage
1972 to 2026
Complete yearUnder 90 percent of days
31 years of record at Decatur 1 N, 1972 to 2026. 11 years have data for under 90 percent of days and are left out of rankings: 1972, 1973, 1974, 1976, 1977, 1978, 1979, 1980 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 20 complete years at Decatur 1 N, 2006 to 2025. Blue stripes are years cooler than the station's own mean of 10.6 C (51.1 F); red stripes are warmer. The coolest year was 2014, at 8.6 C (47.4 F), and the warmest was 2012, at 11.9 C (53.5 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Decatur 1 N as warming stripes, 2006 to 2025
Year
Annual mean temperature
Difference from the station mean
2006
11.1 C
+0.47 C
2007
10.5 C
-0.06 C
2008
9.6 C
-1.02 C
2009
9.7 C
-0.92 C
2010
10.7 C
+0.06 C
2011
10.8 C
+0.16 C
2012
11.9 C
+1.32 C
2013
9.9 C
-0.75 C
2014
8.6 C
-2.04 C
2015
10.2 C
-0.43 C
2016
11.4 C
+0.82 C
2017
11.2 C
+0.61 C
2018
10.3 C
-0.26 C
2019
10.2 C
-0.41 C
2020
11.0 C
+0.39 C
2021
11.1 C
+0.52 C
2022
10.2 C
-0.38 C
2023
11.4 C
+0.77 C
2024
11.9 C
+1.28 C
2025
10.4 C
-0.18 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1931 to 2026
Yearly extremes at Decatur 1 N: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
38.9 C (102.0 F)
2012
34.4 C (93.9 F)
31
Coldest night (TNn)
-28.9 C (-20.0 F)
1972
-21.1 C (-6.0 F)
31
Wettest day (Rx1day)
129.3 mm (5.1 in)
2007
58.6 mm (2.3 in)
96
Wettest five days (Rx5day)
188.1 mm (7.4 in)
2015
84.5 mm (3.3 in)
96
Longest dry spell (CDD)
35 days
1932
18 days
96
Hottest day (TXx)
The hottest day of the year at Decatur 1 N, 1931 to 2026. The record is 38.9 C (102.0 F) in 2012, marked on the chart; the median year is 34.4 C (93.9 F).
Hottest day (TXx) at Decatur 1 N by year
Year
Hottest day (TXx)
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
n/a
1963
n/a
1964
n/a
1965
n/a
1966
n/a
1967
n/a
1968
n/a
1969
n/a
1970
n/a
1971
n/a
1972
35.6 C (96.1 F)
1973
36.7 C (98.1 F)
1974
21.7 C (71.1 F)
1975
n/a
1976
37.2 C (99.0 F)
1977
10.0 C (50.0 F)
1978
3.9 C (39.0 F)
1979
23.9 C (75.0 F)
1980
38.3 C (100.9 F)
1981
22.2 C (72.0 F)
1982
n/a
1983
n/a
1984
n/a
1985
n/a
1986
n/a
1987
n/a
1988
n/a
1989
n/a
1990
n/a
1991
n/a
1992
n/a
1993
n/a
1994
n/a
1995
n/a
1996
n/a
1997
n/a
1998
n/a
1999
n/a
2000
n/a
2001
n/a
2002
n/a
2003
n/a
2004
n/a
2005
33.9 C (93.0 F)
2006
35.0 C (95.0 F)
2007
34.4 C (93.9 F)
2008
36.7 C (98.1 F)
2009
34.4 C (93.9 F)
2010
35.6 C (96.1 F)
2011
37.8 C (100.0 F)
2012
38.9 C (102.0 F)
2013
35.6 C (96.1 F)
2014
33.3 C (91.9 F)
2015
32.8 C (91.0 F)
2016
33.9 C (93.0 F)
2017
33.9 C (93.0 F)
2018
35.0 C (95.0 F)
2019
34.4 C (93.9 F)
2020
34.4 C (93.9 F)
2021
34.4 C (93.9 F)
2022
36.1 C (97.0 F)
2023
33.9 C (93.0 F)
2024
35.6 C (96.1 F)
2025
35.0 C (95.0 F)
2026
35.0 C (95.0 F)
Coldest night (TNn)
The coldest night of the year at Decatur 1 N, 1931 to 2026. The record is -28.9 C (-20.0 F) in 1972, marked on the chart; the median year is -21.1 C (-6.0 F).
Coldest night (TNn) at Decatur 1 N by year
Year
Coldest night (TNn)
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
n/a
1963
n/a
1964
n/a
1965
n/a
1966
n/a
1967
n/a
1968
n/a
1969
n/a
1970
n/a
1971
n/a
1972
-28.9 C (-20.0 F)
1973
10.0 C (50.0 F)
1974
-19.4 C (-2.9 F)
1975
n/a
1976
-24.4 C (-11.9 F)
1977
-23.9 C (-11.0 F)
1978
-24.4 C (-11.9 F)
1979
-26.7 C (-16.1 F)
1980
-20.6 C (-5.1 F)
1981
-10.0 C (14.0 F)
1982
n/a
1983
n/a
1984
n/a
1985
n/a
1986
n/a
1987
n/a
1988
n/a
1989
n/a
1990
n/a
1991
n/a
1992
n/a
1993
n/a
1994
n/a
1995
n/a
1996
n/a
1997
n/a
1998
n/a
1999
n/a
2000
n/a
2001
n/a
2002
n/a
2003
n/a
2004
n/a
2005
-18.3 C (-0.9 F)
2006
-15.6 C (3.9 F)
2007
-24.4 C (-11.9 F)
2008
-19.4 C (-2.9 F)
2009
-27.2 C (-17.0 F)
2010
-21.1 C (-6.0 F)
2011
-21.7 C (-7.1 F)
2012
-15.6 C (3.9 F)
2013
-17.2 C (1.0 F)
2014
-28.3 C (-18.9 F)
2015
-22.2 C (-8.0 F)
2016
-20.0 C (-4.0 F)
2017
-21.7 C (-7.1 F)
2018
-25.0 C (-13.0 F)
2019
-26.7 C (-16.1 F)
2020
-17.2 C (1.0 F)
2021
-20.6 C (-5.1 F)
2022
-22.8 C (-9.0 F)
2023
-13.3 C (8.1 F)
2024
-21.1 C (-6.0 F)
2025
-20.0 C (-4.0 F)
2026
-23.3 C (-9.9 F)
Wettest day (Rx1day)
The wettest day of the year at Decatur 1 N, 1931 to 2026. The record is 129.3 mm (5.1 in) in 2007, marked on the chart; the median year is 58.6 mm (2.3 in).
Wettest day (Rx1day) at Decatur 1 N by year
Year
Wettest day (Rx1day)
1931
39.9 mm (1.6 in)
1932
66.5 mm (2.6 in)
1933
72.6 mm (2.9 in)
1934
48.3 mm (1.9 in)
1935
62.2 mm (2.4 in)
1936
34.8 mm (1.4 in)
1937
46.7 mm (1.8 in)
1938
93.0 mm (3.7 in)
1939
58.7 mm (2.3 in)
1940
36.6 mm (1.4 in)
1941
48.5 mm (1.9 in)
1942
42.7 mm (1.7 in)
1943
114.6 mm (4.5 in)
1944
43.2 mm (1.7 in)
1945
60.7 mm (2.4 in)
1946
63.0 mm (2.5 in)
1947
70.9 mm (2.8 in)
1948
37.3 mm (1.5 in)
1949
82.6 mm (3.3 in)
1950
100.6 mm (4.0 in)
1951
46.2 mm (1.8 in)
1952
73.7 mm (2.9 in)
1953
50.0 mm (2.0 in)
1954
84.1 mm (3.3 in)
1955
58.4 mm (2.3 in)
1956
106.7 mm (4.2 in)
1957
71.1 mm (2.8 in)
1958
53.8 mm (2.1 in)
1959
77.7 mm (3.1 in)
1960
55.4 mm (2.2 in)
1961
46.7 mm (1.8 in)
1962
47.0 mm (1.9 in)
1963
50.5 mm (2.0 in)
1964
68.8 mm (2.7 in)
1965
54.4 mm (2.1 in)
1966
71.1 mm (2.8 in)
1967
37.3 mm (1.5 in)
1968
62.0 mm (2.4 in)
1969
72.9 mm (2.9 in)
1970
30.0 mm (1.2 in)
1971
54.6 mm (2.1 in)
1972
43.9 mm (1.7 in)
1973
36.1 mm (1.4 in)
1974
48.8 mm (1.9 in)
1975
64.8 mm (2.6 in)
1976
32.3 mm (1.3 in)
1977
46.2 mm (1.8 in)
1978
41.9 mm (1.6 in)
1979
49.5 mm (1.9 in)
1980
85.3 mm (3.4 in)
1981
82.6 mm (3.3 in)
1982
31.8 mm (1.3 in)
1983
47.2 mm (1.9 in)
1984
40.4 mm (1.6 in)
1985
46.2 mm (1.8 in)
1986
71.6 mm (2.8 in)
1987
42.2 mm (1.7 in)
1988
36.3 mm (1.4 in)
1989
81.0 mm (3.2 in)
1990
64.5 mm (2.5 in)
1991
85.6 mm (3.4 in)
1992
79.2 mm (3.1 in)
1993
64.0 mm (2.5 in)
1994
40.6 mm (1.6 in)
1995
33.5 mm (1.3 in)
1996
66.5 mm (2.6 in)
1997
71.6 mm (2.8 in)
1998
85.3 mm (3.4 in)
1999
41.4 mm (1.6 in)
2000
62.7 mm (2.5 in)
2001
74.9 mm (2.9 in)
2002
42.7 mm (1.7 in)
2003
77.0 mm (3.0 in)
2004
95.8 mm (3.8 in)
2005
52.8 mm (2.1 in)
2006
51.6 mm (2.0 in)
2007
129.3 mm (5.1 in)
2008
100.8 mm (4.0 in)
2009
76.2 mm (3.0 in)
2010
63.2 mm (2.5 in)
2011
55.9 mm (2.2 in)
2012
53.6 mm (2.1 in)
2013
70.9 mm (2.8 in)
2014
64.3 mm (2.5 in)
2015
95.5 mm (3.8 in)
2016
29.7 mm (1.2 in)
2017
53.8 mm (2.1 in)
2018
81.5 mm (3.2 in)
2019
93.2 mm (3.7 in)
2020
103.1 mm (4.1 in)
2021
54.9 mm (2.2 in)
2022
44.5 mm (1.8 in)
2023
73.9 mm (2.9 in)
2024
45.7 mm (1.8 in)
2025
49.8 mm (2.0 in)
2026
64.8 mm (2.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Decatur 1 N, 1931 to 2026. The record is 188.1 mm (7.4 in) in 2015, marked on the chart; the median year is 84.5 mm (3.3 in).
Wettest five days (Rx5day) at Decatur 1 N by year
Year
Wettest five days (Rx5day)
1931
40.7 mm (1.6 in)
1932
79.7 mm (3.1 in)
1933
80.8 mm (3.2 in)
1934
75.7 mm (3.0 in)
1935
89.8 mm (3.5 in)
1936
45.0 mm (1.8 in)
1937
78.1 mm (3.1 in)
1938
96.0 mm (3.8 in)
1939
115.3 mm (4.5 in)
1940
61.4 mm (2.4 in)
1941
105.4 mm (4.1 in)
1942
76.2 mm (3.0 in)
1943
133.9 mm (5.3 in)
1944
76.7 mm (3.0 in)
1945
114.8 mm (4.5 in)
1946
64.5 mm (2.5 in)
1947
93.1 mm (3.7 in)
1948
77.5 mm (3.1 in)
1949
115.3 mm (4.5 in)
1950
139.6 mm (5.5 in)
1951
56.9 mm (2.2 in)
1952
113.3 mm (4.5 in)
1953
57.6 mm (2.3 in)
1954
104.4 mm (4.1 in)
1955
94.0 mm (3.7 in)
1956
117.9 mm (4.6 in)
1957
106.1 mm (4.2 in)
1958
161.7 mm (6.4 in)
1959
104.4 mm (4.1 in)
1960
78.0 mm (3.1 in)
1961
78.2 mm (3.1 in)
1962
62.7 mm (2.5 in)
1963
67.9 mm (2.7 in)
1964
81.2 mm (3.2 in)
1965
70.2 mm (2.8 in)
1966
125.5 mm (4.9 in)
1967
59.5 mm (2.3 in)
1968
88.5 mm (3.5 in)
1969
85.1 mm (3.4 in)
1970
69.6 mm (2.7 in)
1971
83.5 mm (3.3 in)
1972
81.1 mm (3.2 in)
1973
76.5 mm (3.0 in)
1974
64.8 mm (2.6 in)
1975
92.8 mm (3.7 in)
1976
57.4 mm (2.3 in)
1977
68.8 mm (2.7 in)
1978
48.0 mm (1.9 in)
1979
68.6 mm (2.7 in)
1980
121.1 mm (4.8 in)
1981
92.0 mm (3.6 in)
1982
50.1 mm (2.0 in)
1983
59.9 mm (2.4 in)
1984
58.0 mm (2.3 in)
1985
69.4 mm (2.7 in)
1986
88.1 mm (3.5 in)
1987
71.1 mm (2.8 in)
1988
45.7 mm (1.8 in)
1989
105.3 mm (4.1 in)
1990
67.3 mm (2.6 in)
1991
125.5 mm (4.9 in)
1992
126.4 mm (5.0 in)
1993
96.8 mm (3.8 in)
1994
68.3 mm (2.7 in)
1995
87.7 mm (3.5 in)
1996
127.9 mm (5.0 in)
1997
89.9 mm (3.5 in)
1998
134.1 mm (5.3 in)
1999
52.1 mm (2.1 in)
2000
131.4 mm (5.2 in)
2001
102.9 mm (4.1 in)
2002
67.0 mm (2.6 in)
2003
178.1 mm (7.0 in)
2004
187.3 mm (7.4 in)
2005
79.8 mm (3.1 in)
2006
66.7 mm (2.6 in)
2007
179.3 mm (7.1 in)
2008
126.2 mm (5.0 in)
2009
135.5 mm (5.3 in)
2010
88.9 mm (3.5 in)
2011
87.8 mm (3.5 in)
2012
66.8 mm (2.6 in)
2013
84.4 mm (3.3 in)
2014
73.2 mm (2.9 in)
2015
188.1 mm (7.4 in)
2016
63.8 mm (2.5 in)
2017
111.2 mm (4.4 in)
2018
145.5 mm (5.7 in)
2019
126.8 mm (5.0 in)
2020
127.6 mm (5.0 in)
2021
76.0 mm (3.0 in)
2022
74.6 mm (2.9 in)
2023
82.0 mm (3.2 in)
2024
84.6 mm (3.3 in)
2025
91.5 mm (3.6 in)
2026
161.0 mm (6.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Decatur 1 N, 1931 to 2026. The record is 35 days in 1932, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Decatur 1 N by year
Year
Longest dry spell (CDD)
1931
27 days
1932
35 days
1933
17 days
1934
20 days
1935
16 days
1936
16 days
1937
14 days
1938
20 days
1939
17 days
1940
16 days
1941
26 days
1942
24 days
1943
29 days
1944
32 days
1945
19 days
1946
19 days
1947
16 days
1948
31 days
1949
21 days
1950
15 days
1951
20 days
1952
21 days
1953
26 days
1954
17 days
1955
22 days
1956
28 days
1957
22 days
1958
22 days
1959
12 days
1960
12 days
1961
13 days
1962
18 days
1963
32 days
1964
17 days
1965
14 days
1966
20 days
1967
18 days
1968
17 days
1969
25 days
1970
20 days
1971
13 days
1972
23 days
1973
14 days
1974
14 days
1975
16 days
1976
27 days
1977
31 days
1978
16 days
1979
17 days
1980
16 days
1981
24 days
1982
11 days
1983
27 days
1984
15 days
1985
21 days
1986
15 days
1987
28 days
1988
25 days
1989
34 days
1990
13 days
1991
15 days
1992
20 days
1993
18 days
1994
14 days
1995
32 days
1996
19 days
1997
11 days
1998
19 days
1999
21 days
2000
14 days
2001
26 days
2002
25 days
2003
21 days
2004
21 days
2005
15 days
2006
16 days
2007
14 days
2008
25 days
2009
17 days
2010
18 days
2011
18 days
2012
21 days
2013
19 days
2014
14 days
2015
19 days
2016
15 days
2017
14 days
2018
14 days
2019
13 days
2020
15 days
2021
15 days
2022
14 days
2023
22 days
2024
16 days
2025
24 days
2026
12 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
20 years with a frost
Across 20 years with a frost, the median last spring frost at Decatur 1 N falls on 28 April and the median first autumn frost on 21 October, which leaves a median of 174 days between them.
Frost dates and growing season at Decatur 1 N
Measure
Median, all years
Earliest period
Recent period (2006 to 2025)
Recent against earliest
Fitted trend
Last spring frost
28 April
n/a
28 April
n/a
n/a
First autumn frost
21 October
n/a
21 October
n/a
n/a
Growing days
174 days
n/a
174 days
n/a
n/a
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
93 years, 1933 to 2025
A day with at least 58.5 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 127.4 mm (5.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Decatur 1 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
58.5 mm (2.3 in)
5 years
77.7 mm (3.1 in)
10 years
90.1 mm (3.5 in)
25 years
105.4 mm (4.1 in)
50 years
116.6 mm (4.6 in)
100 years
127.4 mm (5.0 in)
Longer than the 93 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, 93 years of values from 1933 to 2025.
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: 129.3 mm (5.1 in) in 2007; 114.6 mm (4.5 in) in 1943; 106.7 mm (4.2 in) in 1956.
Download the Data
Data for Decatur 1 N standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Decatur 1 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.