Record envelope, standing records and threshold days for Tiskilwa 2 SE (USC00118604), Illinois, United States, with 96 years of record.
Key Facts for Tiskilwa 2 SE
Tiskilwa 2 SE (USC00118604) is a weather station in Illinois, United States at 41.27 latitude and -89.47 longitude, 195 m (640 ft) above sea level.
The station reports from 1895 to 1990, 96 years of record.
1,464 records set at Tiskilwa 2 SE still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Tiskilwa 2 SE set a monthly record high minimum temperature of 23.3 C (73.9 F) on 6 September 1990.
About the Station
Location: Illinois, United States, 41.27 latitude, -89.47 longitude.
Elevation: 195 m (640 ft).
Period of record: 1895 to 1990, 96 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 Tiskilwa 2 SE. 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 Tiskilwa 2 SE, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
21.1 C (70.0 F)
-31.7 C (-25.1 F)
n/a
n/a
Feb
21.7 C (71.1 F)
-33.3 C (-27.9 F)
n/a
n/a
Mar
29.4 C (84.9 F)
-21.7 C (-7.1 F)
n/a
n/a
Apr
32.8 C (91.0 F)
-12.8 C (9.0 F)
n/a
n/a
May
37.8 C (100.0 F)
-3.9 C (25.0 F)
n/a
n/a
Jun
38.3 C (100.9 F)
1.7 C (35.1 F)
n/a
n/a
Jul
42.2 C (108.0 F)
6.7 C (44.1 F)
n/a
n/a
Aug
40.0 C (104.0 F)
4.4 C (39.9 F)
n/a
n/a
Sep
37.8 C (100.0 F)
-3.9 C (25.0 F)
n/a
n/a
Oct
32.2 C (90.0 F)
-9.4 C (15.1 F)
n/a
n/a
Nov
27.2 C (81.0 F)
-20.0 C (-4.0 F)
n/a
n/a
Dec
21.1 C (70.0 F)
-31.1 C (-24.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Tiskilwa 2 SE still stand. 1899 holds the most, with 54.
Standing records at Tiskilwa 2 SE by the year they were set
Year set
Standing records
1895
46
1896
1
1897
3
1898
32
1899
54
1900
51
1901
49
1902
36
1903
37
1904
42
1905
28
1906
35
1907
24
1908
31
1909
46
1910
37
1963
6
1964
42
1965
39
1966
37
1967
39
1968
32
1969
35
1970
36
1971
54
1972
33
1973
32
1974
33
1975
27
1976
48
1977
39
1978
21
1979
29
1980
25
1981
24
1982
31
1983
35
1984
39
1985
22
1986
18
1987
27
1988
41
1989
43
1990
25
All-Time Record Progression
2 new records
2 all-time records were set at Tiskilwa 2 SE between 13 January 1979 and 18 August 1979. Each dot is a new record.
When Tiskilwa 2 SE set new all-time records
Date
Kind
Detail
1979-01-13
Record daily snowfall
Record daily snowfall 38.1 cm (15.0 in)
1979-08-18
Record daily precipitation
Record daily precipitation 145.3 mm (5.7 in)
Wettest Day of Each Month
Aug: 145.3 mm (5.7 in)
The wettest day on record for each calendar month at Tiskilwa 2 SE. The most was 145.3 mm (5.7 in) on 18 August 1979.
Record daily precipitation for each month at Tiskilwa 2 SE
Month
Record daily precipitation (mm)
Date
Jan
78.7 mm (3.1 in)
24 January 1938
Feb
58.9 mm (2.3 in)
6 February 1942
Mar
87.6 mm (3.4 in)
25 March 1954
Apr
79.2 mm (3.1 in)
27 April 1943
May
78.7 mm (3.1 in)
23 May 1907
Jun
133.4 mm (5.3 in)
29 June 1990
Jul
144.8 mm (5.7 in)
18 July 1902
Aug
145.3 mm (5.7 in)
18 August 1979
Sep
108.0 mm (4.3 in)
6 September 1989
Oct
102.1 mm (4.0 in)
10 October 1954
Nov
81.8 mm (3.2 in)
17 November 1928
Dec
83.6 mm (3.3 in)
2 December 1982
Period of Record Coverage
1895 to 1990
Complete yearUnder 90 percent of days
44 years of record at Tiskilwa 2 SE, 1895 to 1990. 12 years have data for under 90 percent of days and are left out of rankings: 1895, 1896, 1897, 1905, 1906, 1907, 1908, 1910 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 30 complete years at Tiskilwa 2 SE, 1898 to 1989. Blue stripes are years cooler than the station's own mean of 9.9 C (49.8 F); red stripes are warmer. The coolest year was 1904, at 8.2 C (46.8 F), and the warmest was 1987, at 11.7 C (53.1 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Tiskilwa 2 SE as warming stripes, 1898 to 1989
Year
Annual mean temperature
Difference from the station mean
1898
9.7 C
-0.22 C
1899
9.7 C
-0.18 C
1900
10.2 C
+0.34 C
1903
9.0 C
-0.94 C
1904
8.2 C
-1.65 C
1909
9.6 C
-0.32 C
1964
11.0 C
+1.10 C
1965
10.6 C
+0.66 C
1966
10.0 C
+0.09 C
1967
9.8 C
-0.13 C
1968
9.9 C
-0.01 C
1969
8.9 C
-0.97 C
1970
9.9 C
+0.03 C
1971
10.9 C
+1.00 C
1972
9.5 C
-0.38 C
1973
11.3 C
+1.36 C
1974
10.4 C
+0.55 C
1975
10.5 C
+0.56 C
1976
9.5 C
-0.43 C
1977
10.1 C
+0.21 C
1978
9.1 C
-0.81 C
1979
8.9 C
-0.95 C
1982
9.7 C
-0.21 C
1983
10.4 C
+0.53 C
1984
10.3 C
+0.44 C
1985
9.2 C
-0.73 C
1986
10.1 C
+0.16 C
1987
11.7 C
+1.81 C
1988
10.0 C
+0.06 C
1989
9.0 C
-0.89 C
The fitted trend in annual mean temperature here over 1898 to 1989 is 0.07 C (-0.02 to 0.16) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.13 F (-0.04 to 0.29) per decade. The slope is a straight line fitted to 30 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Tiskilwa 2 SE
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.07 C (-0.02 to 0.16) per decade
0.13 F (-0.04 to 0.29) per decade
1898 to 1989
30
Not clearly different from zero
Mean daily maximum
0.2 C (0.1 to 0.3) per decade
0.3 F (0.1 to 0.5) per decade
1898 to 1989
30
Rise
Mean daily minimum
-0.03 C (-0.14 to 0.07) per decade
-0.1 F (-0.2 to 0.1) per decade
1898 to 1989
30
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
1895 to 1990
Yearly extremes at Tiskilwa 2 SE: 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)
1901
36.1 C (97.0 F)
44
Coldest night (TNn)
-33.3 C (-27.9 F)
1905
-25.3 C (-13.5 F)
44
Wettest day (Rx1day)
145.3 mm (5.7 in)
1979
62.4 mm (2.5 in)
96
Wettest five days (Rx5day)
256.3 mm (10.1 in)
1979
93.1 mm (3.7 in)
96
Longest dry spell (CDD)
44 days
1956
21 days
96
Hottest day (TXx)
The hottest day of the year at Tiskilwa 2 SE, 1895 to 1990. The record is 42.2 C (108.0 F) in 1901, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Tiskilwa 2 SE by year
Year
Hottest day (TXx)
1895
38.3 C (100.9 F)
1896
15.0 C (59.0 F)
1897
37.8 C (100.0 F)
1898
35.6 C (96.1 F)
1899
37.8 C (100.0 F)
1900
37.2 C (99.0 F)
1901
42.2 C (108.0 F)
1902
32.2 C (90.0 F)
1903
35.6 C (96.1 F)
1904
33.3 C (91.9 F)
1905
33.3 C (91.9 F)
1906
36.1 C (97.0 F)
1907
33.3 C (91.9 F)
1908
35.6 C (96.1 F)
1909
33.3 C (91.9 F)
1910
36.7 C (98.1 F)
1911
n/a
1912
n/a
1913
n/a
1914
n/a
1915
n/a
1916
n/a
1917
n/a
1918
n/a
1919
n/a
1920
n/a
1921
n/a
1922
n/a
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
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
n/a
1963
14.4 C (57.9 F)
1964
37.2 C (99.0 F)
1965
36.1 C (97.0 F)
1966
38.3 C (100.9 F)
1967
33.9 C (93.0 F)
1968
36.1 C (97.0 F)
1969
35.6 C (96.1 F)
1970
37.2 C (99.0 F)
1971
37.8 C (100.0 F)
1972
36.1 C (97.0 F)
1973
36.1 C (97.0 F)
1974
36.7 C (98.1 F)
1975
34.4 C (93.9 F)
1976
36.1 C (97.0 F)
1977
36.7 C (98.1 F)
1978
35.6 C (96.1 F)
1979
35.0 C (95.0 F)
1980
35.6 C (96.1 F)
1981
35.0 C (95.0 F)
1982
33.9 C (93.0 F)
1983
39.4 C (102.9 F)
1984
36.1 C (97.0 F)
1985
35.6 C (96.1 F)
1986
35.0 C (95.0 F)
1987
37.8 C (100.0 F)
1988
40.0 C (104.0 F)
1989
38.3 C (100.9 F)
1990
35.0 C (95.0 F)
Coldest night (TNn)
The coldest night of the year at Tiskilwa 2 SE, 1895 to 1990. The record is -33.3 C (-27.9 F) in 1905, marked on the chart; the median year is -25.3 C (-13.5 F).
Coldest night (TNn) at Tiskilwa 2 SE by year
Year
Coldest night (TNn)
1895
1.1 C (34.0 F)
1896
-21.7 C (-7.1 F)
1897
-21.1 C (-6.0 F)
1898
-24.4 C (-11.9 F)
1899
-31.1 C (-24.0 F)
1900
-22.8 C (-9.0 F)
1901
-25.6 C (-14.1 F)
1902
-26.1 C (-15.0 F)
1903
-28.3 C (-18.9 F)
1904
-25.0 C (-13.0 F)
1905
-33.3 C (-27.9 F)
1906
-18.9 C (-2.0 F)
1907
-21.7 C (-7.1 F)
1908
-23.3 C (-9.9 F)
1909
-26.7 C (-16.1 F)
1910
-26.1 C (-15.0 F)
1911
n/a
1912
n/a
1913
n/a
1914
n/a
1915
n/a
1916
n/a
1917
n/a
1918
n/a
1919
n/a
1920
n/a
1921
n/a
1922
n/a
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
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
n/a
1963
-28.9 C (-20.0 F)
1964
-22.2 C (-8.0 F)
1965
-23.9 C (-11.0 F)
1966
-27.8 C (-18.0 F)
1967
-24.4 C (-11.9 F)
1968
-25.6 C (-14.1 F)
1969
-23.9 C (-11.0 F)
1970
-28.3 C (-18.9 F)
1971
-23.3 C (-9.9 F)
1972
-28.3 C (-18.9 F)
1973
-22.2 C (-8.0 F)
1974
-26.7 C (-16.1 F)
1975
-23.3 C (-9.9 F)
1976
-25.6 C (-14.1 F)
1977
-30.0 C (-22.0 F)
1978
-25.0 C (-13.0 F)
1979
-30.0 C (-22.0 F)
1980
-18.9 C (-2.0 F)
1981
-25.0 C (-13.0 F)
1982
-30.0 C (-22.0 F)
1983
-30.6 C (-23.1 F)
1984
-28.9 C (-20.0 F)
1985
-31.7 C (-25.1 F)
1986
-25.0 C (-13.0 F)
1987
-22.2 C (-8.0 F)
1988
-26.1 C (-15.0 F)
1989
-31.1 C (-24.0 F)
1990
-17.8 C (0.0 F)
Wettest day (Rx1day)
The wettest day of the year at Tiskilwa 2 SE, 1895 to 1990. The record is 145.3 mm (5.7 in) in 1979, marked on the chart; the median year is 62.4 mm (2.5 in).
Wettest day (Rx1day) at Tiskilwa 2 SE by year
Year
Wettest day (Rx1day)
1895
63.5 mm (2.5 in)
1896
44.7 mm (1.8 in)
1897
69.6 mm (2.7 in)
1898
103.1 mm (4.1 in)
1899
42.7 mm (1.7 in)
1900
72.6 mm (2.9 in)
1901
47.8 mm (1.9 in)
1902
144.8 mm (5.7 in)
1903
48.5 mm (1.9 in)
1904
77.2 mm (3.0 in)
1905
63.0 mm (2.5 in)
1906
96.0 mm (3.8 in)
1907
124.0 mm (4.9 in)
1908
72.6 mm (2.9 in)
1909
76.2 mm (3.0 in)
1910
43.4 mm (1.7 in)
1911
52.1 mm (2.1 in)
1912
59.4 mm (2.3 in)
1913
59.7 mm (2.4 in)
1914
42.7 mm (1.7 in)
1915
57.4 mm (2.3 in)
1916
111.8 mm (4.4 in)
1917
35.6 mm (1.4 in)
1918
56.9 mm (2.2 in)
1919
48.3 mm (1.9 in)
1920
62.2 mm (2.4 in)
1921
76.7 mm (3.0 in)
1922
56.4 mm (2.2 in)
1923
61.0 mm (2.4 in)
1924
77.0 mm (3.0 in)
1925
71.1 mm (2.8 in)
1926
50.5 mm (2.0 in)
1927
54.1 mm (2.1 in)
1928
81.8 mm (3.2 in)
1929
95.3 mm (3.8 in)
1930
69.1 mm (2.7 in)
1931
69.9 mm (2.8 in)
1932
43.9 mm (1.7 in)
1933
51.1 mm (2.0 in)
1934
64.8 mm (2.6 in)
1935
39.6 mm (1.6 in)
1936
52.1 mm (2.1 in)
1937
41.7 mm (1.6 in)
1938
78.7 mm (3.1 in)
1939
62.2 mm (2.4 in)
1940
46.7 mm (1.8 in)
1941
72.9 mm (2.9 in)
1942
63.2 mm (2.5 in)
1943
79.2 mm (3.1 in)
1944
36.6 mm (1.4 in)
1945
37.3 mm (1.5 in)
1946
52.6 mm (2.1 in)
1947
65.0 mm (2.6 in)
1948
65.3 mm (2.6 in)
1949
97.3 mm (3.8 in)
1950
57.7 mm (2.3 in)
1951
80.0 mm (3.1 in)
1952
54.6 mm (2.1 in)
1953
73.2 mm (2.9 in)
1954
102.1 mm (4.0 in)
1955
45.7 mm (1.8 in)
1956
37.8 mm (1.5 in)
1957
61.7 mm (2.4 in)
1958
61.5 mm (2.4 in)
1959
100.1 mm (3.9 in)
1960
52.6 mm (2.1 in)
1961
69.9 mm (2.8 in)
1962
53.8 mm (2.1 in)
1963
51.3 mm (2.0 in)
1964
64.0 mm (2.5 in)
1965
62.5 mm (2.5 in)
1966
62.5 mm (2.5 in)
1967
43.9 mm (1.7 in)
1968
72.4 mm (2.9 in)
1969
76.7 mm (3.0 in)
1970
95.3 mm (3.8 in)
1971
50.8 mm (2.0 in)
1972
69.1 mm (2.7 in)
1973
58.7 mm (2.3 in)
1974
59.9 mm (2.4 in)
1975
56.6 mm (2.2 in)
1976
88.9 mm (3.5 in)
1977
83.6 mm (3.3 in)
1978
51.3 mm (2.0 in)
1979
145.3 mm (5.7 in)
1980
50.8 mm (2.0 in)
1981
79.2 mm (3.1 in)
1982
92.2 mm (3.6 in)
1983
59.7 mm (2.4 in)
1984
64.3 mm (2.5 in)
1985
75.9 mm (3.0 in)
1986
55.1 mm (2.2 in)
1987
52.6 mm (2.1 in)
1988
40.1 mm (1.6 in)
1989
108.0 mm (4.3 in)
1990
133.4 mm (5.3 in)
Wettest five days (Rx5day)
The wettest five days of the year at Tiskilwa 2 SE, 1895 to 1990. The record is 256.3 mm (10.1 in) in 1979, marked on the chart; the median year is 93.1 mm (3.7 in).
Wettest five days (Rx5day) at Tiskilwa 2 SE by year
Year
Wettest five days (Rx5day)
1895
118.4 mm (4.7 in)
1896
77.3 mm (3.0 in)
1897
107.2 mm (4.2 in)
1898
109.5 mm (4.3 in)
1899
62.7 mm (2.5 in)
1900
142.7 mm (5.6 in)
1901
108.0 mm (4.3 in)
1902
174.7 mm (6.9 in)
1903
93.7 mm (3.7 in)
1904
93.8 mm (3.7 in)
1905
42.9 mm (1.7 in)
1906
134.1 mm (5.3 in)
1907
160.9 mm (6.3 in)
1908
92.4 mm (3.6 in)
1909
88.4 mm (3.5 in)
1910
57.7 mm (2.3 in)
1911
71.4 mm (2.8 in)
1912
93.7 mm (3.7 in)
1913
79.5 mm (3.1 in)
1914
57.7 mm (2.3 in)
1915
103.7 mm (4.1 in)
1916
138.0 mm (5.4 in)
1917
66.8 mm (2.6 in)
1918
67.4 mm (2.7 in)
1919
76.5 mm (3.0 in)
1920
108.0 mm (4.3 in)
1921
97.3 mm (3.8 in)
1922
76.7 mm (3.0 in)
1923
94.1 mm (3.7 in)
1924
180.9 mm (7.1 in)
1925
82.5 mm (3.2 in)
1926
95.5 mm (3.8 in)
1927
113.9 mm (4.5 in)
1928
96.3 mm (3.8 in)
1929
174.6 mm (6.9 in)
1930
73.9 mm (2.9 in)
1931
97.3 mm (3.8 in)
1932
75.9 mm (3.0 in)
1933
59.0 mm (2.3 in)
1934
105.5 mm (4.2 in)
1935
69.6 mm (2.7 in)
1936
100.1 mm (3.9 in)
1937
107.2 mm (4.2 in)
1938
80.5 mm (3.2 in)
1939
88.1 mm (3.5 in)
1940
70.9 mm (2.8 in)
1941
170.7 mm (6.7 in)
1942
79.1 mm (3.1 in)
1943
106.9 mm (4.2 in)
1944
97.7 mm (3.8 in)
1945
82.0 mm (3.2 in)
1946
92.5 mm (3.6 in)
1947
65.0 mm (2.6 in)
1948
74.7 mm (2.9 in)
1949
99.1 mm (3.9 in)
1950
90.7 mm (3.6 in)
1951
91.6 mm (3.6 in)
1952
88.1 mm (3.5 in)
1953
74.5 mm (2.9 in)
1954
136.9 mm (5.4 in)
1955
103.2 mm (4.1 in)
1956
64.9 mm (2.6 in)
1957
85.1 mm (3.4 in)
1958
114.0 mm (4.5 in)
1959
145.3 mm (5.7 in)
1960
88.2 mm (3.5 in)
1961
112.3 mm (4.4 in)
1962
94.3 mm (3.7 in)
1963
77.2 mm (3.0 in)
1964
77.0 mm (3.0 in)
1965
79.3 mm (3.1 in)
1966
126.8 mm (5.0 in)
1967
72.2 mm (2.8 in)
1968
144.4 mm (5.7 in)
1969
134.9 mm (5.3 in)
1970
139.2 mm (5.5 in)
1971
87.1 mm (3.4 in)
1972
79.3 mm (3.1 in)
1973
76.0 mm (3.0 in)
1974
118.6 mm (4.7 in)
1975
108.7 mm (4.3 in)
1976
120.7 mm (4.8 in)
1977
83.6 mm (3.3 in)
1978
83.0 mm (3.3 in)
1979
256.3 mm (10.1 in)
1980
66.8 mm (2.6 in)
1981
155.9 mm (6.1 in)
1982
124.0 mm (4.9 in)
1983
89.4 mm (3.5 in)
1984
66.6 mm (2.6 in)
1985
91.4 mm (3.6 in)
1986
83.1 mm (3.3 in)
1987
101.6 mm (4.0 in)
1988
64.2 mm (2.5 in)
1989
136.8 mm (5.4 in)
1990
130.0 mm (5.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Tiskilwa 2 SE, 1895 to 1990. The record is 44 days in 1956, marked on the chart; the median year is 21 days.
Longest dry spell (CDD) at Tiskilwa 2 SE by year
Year
Longest dry spell (CDD)
1895
25 days
1896
20 days
1897
24 days
1898
21 days
1899
17 days
1900
16 days
1901
21 days
1902
19 days
1903
28 days
1904
30 days
1905
18 days
1906
20 days
1907
18 days
1908
23 days
1909
17 days
1910
22 days
1911
18 days
1912
26 days
1913
22 days
1914
23 days
1915
31 days
1916
20 days
1917
30 days
1918
19 days
1919
36 days
1920
20 days
1921
14 days
1922
23 days
1923
23 days
1924
22 days
1925
21 days
1926
12 days
1927
19 days
1928
18 days
1929
16 days
1930
22 days
1931
17 days
1932
17 days
1933
29 days
1934
21 days
1935
16 days
1936
26 days
1937
15 days
1938
24 days
1939
30 days
1940
20 days
1941
19 days
1942
17 days
1943
20 days
1944
28 days
1945
27 days
1946
34 days
1947
33 days
1948
22 days
1949
21 days
1950
18 days
1951
17 days
1952
33 days
1953
23 days
1954
19 days
1955
30 days
1956
44 days
1957
30 days
1958
32 days
1959
28 days
1960
25 days
1961
18 days
1962
25 days
1963
30 days
1964
20 days
1965
20 days
1966
25 days
1967
24 days
1968
29 days
1969
42 days
1970
16 days
1971
31 days
1972
16 days
1973
15 days
1974
20 days
1975
13 days
1976
27 days
1977
22 days
1978
16 days
1979
38 days
1980
14 days
1981
29 days
1982
17 days
1983
18 days
1984
14 days
1985
16 days
1986
23 days
1987
14 days
1988
25 days
1989
21 days
1990
10 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
30 years with a frost
Across 30 years with a frost, the median last spring frost at Tiskilwa 2 SE falls on 2 May and the median first autumn frost on 12 October, which leaves a median of 163 days between them.
Fitted over all years, the growing season changes by -1.4 days per decade at this station.
Frost dates and growing season at Tiskilwa 2 SE
Measure
Median, all years
Earliest period
Recent period (1898 to 1989)
Recent against earliest
Fitted trend
Last spring frost
2 May
n/a
2 May
n/a
+0.2 days per decade
First autumn frost
12 October
n/a
12 October
n/a
-1.2 days per decade
Growing days
163 days
n/a
163 days
n/a
-1.4 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
86 years, 1896 to 1989
A day with at least 62.0 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 130.1 mm (5.1 in) of rain is expected about once in 100 years.
Rainfall return levels at Tiskilwa 2 SE: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
62.0 mm (2.4 in)
5 years
79.8 mm (3.1 in)
10 years
91.7 mm (3.6 in)
25 years
107.0 mm (4.2 in)
50 years
118.5 mm (4.7 in)
100 years
130.1 mm (5.1 in)
Longer than the 86 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, 86 years of values from 1896 to 1989.
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: 145.3 mm (5.7 in) in 1979; 111.8 mm (4.4 in) in 1916; 108.0 mm (4.3 in) in 1989.
Download the Data
Data for Tiskilwa 2 SE standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Tiskilwa 2 SE 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.