Record envelope, standing records and threshold days for Oelwein 2 S (USC00136200), Iowa, United States, with 83 years of record.
Key Facts for Oelwein 2 S
Oelwein 2 S (USC00136200) is a weather station in Iowa, United States at 42.65 latitude and -91.91 longitude, 308 m (1,010 ft) above sea level.
The station reports from 1923 to 2005, 83 years of record.
1,464 records set at Oelwein 2 S still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Oelwein 2 S set a daily record high minimum temperature of 21.1 C (70.0 F) on 5 October 2005.
About the Station
Location: Iowa, United States, 42.65 latitude, -91.91 longitude.
Elevation: 308 m (1,010 ft).
Period of record: 1923 to 2005, 83 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 Oelwein 2 S. 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 Oelwein 2 S, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
16.1 C (61.0 F)
-35.6 C (-32.1 F)
n/a
n/a
Feb
20.0 C (68.0 F)
-35.6 C (-32.1 F)
n/a
n/a
Mar
29.4 C (84.9 F)
-32.8 C (-27.0 F)
n/a
n/a
Apr
35.6 C (96.1 F)
-16.1 C (3.0 F)
n/a
n/a
May
41.1 C (106.0 F)
-5.6 C (21.9 F)
n/a
n/a
Jun
41.1 C (106.0 F)
2.2 C (36.0 F)
n/a
n/a
Jul
42.8 C (109.0 F)
4.4 C (39.9 F)
n/a
n/a
Aug
42.8 C (109.0 F)
2.8 C (37.0 F)
n/a
n/a
Sep
39.4 C (102.9 F)
-5.6 C (21.9 F)
n/a
n/a
Oct
34.4 C (93.9 F)
-16.7 C (1.9 F)
n/a
n/a
Nov
25.6 C (78.1 F)
-27.8 C (-18.0 F)
n/a
n/a
Dec
18.9 C (66.0 F)
-33.9 C (-29.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Oelwein 2 S still stand. 1936 holds the most, with 66.
Standing records at Oelwein 2 S by the year they were set
Year set
Standing records
1923
11
1924
16
1925
31
1926
11
1927
30
1928
22
1929
16
1930
37
1931
40
1932
11
1933
24
1934
37
1935
20
1936
66
1937
21
1938
14
1939
22
1940
21
1941
20
1942
23
1943
16
1944
8
1945
17
1946
18
1947
28
1948
15
1949
20
1950
19
1951
17
1952
17
1953
18
1954
12
1955
12
1956
16
1957
5
1958
17
1959
13
1960
16
1961
10
1962
19
1963
23
1964
16
1965
20
1966
17
1967
17
1968
11
1969
7
1970
15
1971
12
1972
10
1973
16
1974
14
1975
14
1976
21
1977
24
1978
11
1979
15
1980
8
1981
13
1982
9
1983
24
1984
11
1985
14
1986
24
1987
8
1988
21
1989
16
1990
15
1991
29
1992
18
1993
11
1994
16
1995
9
1996
19
1997
11
1998
20
1999
14
2000
26
2001
11
2002
12
2003
13
2004
15
2005
8
All-Time Record Progression
4 new records
4 all-time records were set at Oelwein 2 S between 18 February 1962 and 2 February 1996. Each dot is a new record.
When Oelwein 2 S set new all-time records
Date
Kind
Detail
1962-02-18
Record daily snowfall
Record daily snowfall 33.0 cm (13.0 in)
1983-12-23
Record low maximum temperature
Record low maximum temperature -27.2 C (-17.0 F)
1989-09-07
Record daily precipitation
Record daily precipitation 182.6 mm (7.2 in)
1996-02-02
Record low maximum temperature
Record low maximum temperature -28.9 C (-20.0 F)
Wettest Day of Each Month
Sep: 182.6 mm (7.2 in)
The wettest day on record for each calendar month at Oelwein 2 S. The most was 182.6 mm (7.2 in) on 7 September 1989.
Record daily precipitation for each month at Oelwein 2 S
Month
Record daily precipitation (mm)
Date
Jan
40.6 mm (1.6 in)
5 January 1946
Feb
37.1 mm (1.5 in)
18 February 1962
Mar
54.9 mm (2.2 in)
4 March 1924
Apr
60.5 mm (2.4 in)
12 April 1991
May
111.3 mm (4.4 in)
16 May 1999
Jun
165.1 mm (6.5 in)
15 June 1925
Jul
117.6 mm (4.6 in)
19 July 1963
Aug
162.1 mm (6.4 in)
31 August 1981
Sep
182.6 mm (7.2 in)
7 September 1989
Oct
61.0 mm (2.4 in)
2 October 1927
Nov
63.5 mm (2.5 in)
3 November 2003
Dec
38.1 mm (1.5 in)
2 December 1991
Period of Record Coverage
1923 to 2005
Complete yearUnder 90 percent of days
83 years of record at Oelwein 2 S, 1923 to 2005. 8 years have data for under 90 percent of days and are left out of rankings: 1923, 1944, 1950, 1968, 1971, 1974, 1982, 2005.
Cooler than the station meanWarmer than the station mean
One stripe for each of 67 complete years at Oelwein 2 S, 1924 to 2004. Blue stripes are years cooler than the station's own mean of 8.2 C (46.8 F); red stripes are warmer. The coolest year was 1996, at 6.2 C (43.1 F), and the warmest was 1931, at 11.3 C (52.4 F). The strongest colour marks a difference of 3.1 C (5.6 F).
Annual mean temperature at Oelwein 2 S as warming stripes, 1924 to 2004
Year
Annual mean temperature
Difference from the station mean
1924
7.1 C
-1.10 C
1925
8.3 C
+0.05 C
1926
7.9 C
-0.31 C
1927
8.7 C
+0.48 C
1928
8.9 C
+0.72 C
1929
7.0 C
-1.18 C
1930
9.1 C
+0.87 C
1931
11.3 C
+3.10 C
1932
8.5 C
+0.26 C
1933
9.6 C
+1.41 C
1934
9.8 C
+1.57 C
1935
8.4 C
+0.13 C
1936
8.1 C
-0.09 C
1937
7.1 C
-1.09 C
1938
9.0 C
+0.82 C
1939
9.7 C
+1.44 C
1940
8.3 C
+0.11 C
1941
10.3 C
+2.05 C
1942
8.5 C
+0.30 C
1943
7.3 C
-0.90 C
1945
7.7 C
-0.55 C
1946
9.6 C
+1.41 C
1947
8.7 C
+0.46 C
1948
8.9 C
+0.71 C
1949
9.1 C
+0.86 C
1951
6.6 C
-1.63 C
1953
8.3 C
+0.03 C
1954
9.2 C
+0.97 C
1957
8.3 C
+0.12 C
1958
7.6 C
-0.60 C
1959
7.8 C
-0.47 C
1960
7.6 C
-0.63 C
1961
7.8 C
-0.46 C
1962
7.3 C
-0.91 C
1963
7.7 C
-0.49 C
1964
8.5 C
+0.23 C
1965
7.6 C
-0.66 C
1966
7.6 C
-0.60 C
1967
7.7 C
-0.57 C
1969
7.7 C
-0.56 C
1970
7.6 C
-0.61 C
1975
8.0 C
-0.26 C
1976
7.7 C
-0.50 C
1978
7.1 C
-1.13 C
1979
7.1 C
-1.14 C
1980
8.4 C
+0.18 C
1981
9.0 C
+0.74 C
1984
8.5 C
+0.27 C
1985
7.3 C
-0.95 C
1986
7.9 C
-0.28 C
1987
9.8 C
+1.54 C
1988
8.3 C
+0.07 C
1989
7.3 C
-0.90 C
1990
8.9 C
+0.71 C
1991
8.3 C
+0.06 C
1992
7.8 C
-0.44 C
1993
6.8 C
-1.44 C
1994
7.6 C
-0.58 C
1995
7.5 C
-0.72 C
1996
6.2 C
-2.07 C
1997
7.3 C
-0.97 C
1998
9.9 C
+1.64 C
1999
9.0 C
+0.79 C
2000
8.4 C
+0.14 C
2001
8.5 C
+0.24 C
2002
8.7 C
+0.43 C
2004
8.4 C
+0.15 C
The fitted trend in annual mean temperature here over 1924 to 2004 is -0.09 C (-0.18 to 0.00) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.16 F (-0.33 to 0.00) per decade. The slope is a straight line fitted to 67 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Oelwein 2 S
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.09 C (-0.18 to 0.00) per decade
-0.16 F (-0.33 to 0.00) per decade
1924 to 2004
67
Not clearly different from zero
Mean daily maximum
-0.2 C (-0.3 to -0.1) per decade
-0.3 F (-0.5 to -0.1) per decade
1924 to 2004
67
Fall
Mean daily minimum
-0.02 C (-0.12 to 0.07) per decade
-0.04 F (-0.21 to 0.13) per decade
1924 to 2004
67
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
1923 to 2005
Yearly extremes at Oelwein 2 S: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.8 C (109.0 F)
1936
35.0 C (95.0 F)
83
Coldest night (TNn)
-35.6 C (-32.1 F)
1942
-29.4 C (-20.9 F)
83
Wettest day (Rx1day)
182.6 mm (7.2 in)
1989
58.9 mm (2.3 in)
83
Wettest five days (Rx5day)
221.0 mm (8.7 in)
1925
92.7 mm (3.6 in)
83
Longest dry spell (CDD)
55 days
1952
22 days
83
Hottest day (TXx)
The hottest day of the year at Oelwein 2 S, 1923 to 2005. The record is 42.8 C (109.0 F) in 1936, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Oelwein 2 S by year
Year
Hottest day (TXx)
1923
35.6 C (96.1 F)
1924
33.9 C (93.0 F)
1925
36.1 C (97.0 F)
1926
37.8 C (100.0 F)
1927
36.1 C (97.0 F)
1928
34.4 C (93.9 F)
1929
33.3 C (91.9 F)
1930
39.4 C (102.9 F)
1931
40.0 C (104.0 F)
1932
36.1 C (97.0 F)
1933
38.9 C (102.0 F)
1934
41.1 C (106.0 F)
1935
36.7 C (98.1 F)
1936
42.8 C (109.0 F)
1937
40.0 C (104.0 F)
1938
36.7 C (98.1 F)
1939
39.4 C (102.9 F)
1940
39.4 C (102.9 F)
1941
38.9 C (102.0 F)
1942
36.1 C (97.0 F)
1943
36.7 C (98.1 F)
1944
35.0 C (95.0 F)
1945
35.6 C (96.1 F)
1946
36.7 C (98.1 F)
1947
38.9 C (102.0 F)
1948
37.8 C (100.0 F)
1949
36.7 C (98.1 F)
1950
29.4 C (84.9 F)
1951
33.9 C (93.0 F)
1952
35.0 C (95.0 F)
1953
35.0 C (95.0 F)
1954
35.6 C (96.1 F)
1955
37.2 C (99.0 F)
1956
35.0 C (95.0 F)
1957
35.0 C (95.0 F)
1958
32.8 C (91.0 F)
1959
32.8 C (91.0 F)
1960
34.4 C (93.9 F)
1961
33.9 C (93.0 F)
1962
33.3 C (91.9 F)
1963
36.1 C (97.0 F)
1964
35.6 C (96.1 F)
1965
35.0 C (95.0 F)
1966
35.0 C (95.0 F)
1967
32.8 C (91.0 F)
1968
33.9 C (93.0 F)
1969
33.3 C (91.9 F)
1970
36.7 C (98.1 F)
1971
33.9 C (93.0 F)
1972
34.4 C (93.9 F)
1973
33.3 C (91.9 F)
1974
33.9 C (93.0 F)
1975
34.4 C (93.9 F)
1976
35.6 C (96.1 F)
1977
34.4 C (93.9 F)
1978
34.4 C (93.9 F)
1979
32.2 C (90.0 F)
1980
36.1 C (97.0 F)
1981
35.6 C (96.1 F)
1982
34.4 C (93.9 F)
1983
36.7 C (98.1 F)
1984
36.1 C (97.0 F)
1985
36.1 C (97.0 F)
1986
33.9 C (93.0 F)
1987
36.7 C (98.1 F)
1988
39.4 C (102.9 F)
1989
37.8 C (100.0 F)
1990
35.6 C (96.1 F)
1991
35.0 C (95.0 F)
1992
32.8 C (91.0 F)
1993
31.7 C (89.1 F)
1994
33.9 C (93.0 F)
1995
36.7 C (98.1 F)
1996
34.4 C (93.9 F)
1997
34.4 C (93.9 F)
1998
33.9 C (93.0 F)
1999
35.0 C (95.0 F)
2000
33.9 C (93.0 F)
2001
33.9 C (93.0 F)
2002
34.4 C (93.9 F)
2003
36.1 C (97.0 F)
2004
31.7 C (89.1 F)
2005
33.3 C (91.9 F)
Coldest night (TNn)
The coldest night of the year at Oelwein 2 S, 1923 to 2005. The record is -35.6 C (-32.1 F) in 1942, marked on the chart; the median year is -29.4 C (-20.9 F).
Coldest night (TNn) at Oelwein 2 S by year
Year
Coldest night (TNn)
1923
-12.2 C (10.0 F)
1924
-31.7 C (-25.1 F)
1925
-27.8 C (-18.0 F)
1926
-27.2 C (-17.0 F)
1927
-23.9 C (-11.0 F)
1928
-25.6 C (-14.1 F)
1929
-33.9 C (-29.0 F)
1930
-31.7 C (-25.1 F)
1931
-22.2 C (-8.0 F)
1932
-26.7 C (-16.1 F)
1933
-31.7 C (-25.1 F)
1934
-25.0 C (-13.0 F)
1935
-30.6 C (-23.1 F)
1936
-33.3 C (-27.9 F)
1937
-26.7 C (-16.1 F)
1938
-26.7 C (-16.1 F)
1939
-25.0 C (-13.0 F)
1940
-29.4 C (-20.9 F)
1941
-26.1 C (-15.0 F)
1942
-35.6 C (-32.1 F)
1943
-31.1 C (-24.0 F)
1944
-27.2 C (-17.0 F)
1945
-25.6 C (-14.1 F)
1946
-26.7 C (-16.1 F)
1947
-27.2 C (-17.0 F)
1948
-26.7 C (-16.1 F)
1949
-28.9 C (-20.0 F)
1950
-33.3 C (-27.9 F)
1951
-34.4 C (-29.9 F)
1952
-29.4 C (-20.9 F)
1953
-27.2 C (-17.0 F)
1954
-27.2 C (-17.0 F)
1955
-28.9 C (-20.0 F)
1956
-31.7 C (-25.1 F)
1957
-29.4 C (-20.9 F)
1958
-31.7 C (-25.1 F)
1959
-29.4 C (-20.9 F)
1960
-28.9 C (-20.0 F)
1961
-32.2 C (-26.0 F)
1962
-32.8 C (-27.0 F)
1963
-34.4 C (-29.9 F)
1964
-23.9 C (-11.0 F)
1965
-30.6 C (-23.1 F)
1966
-32.2 C (-26.0 F)
1967
-33.3 C (-27.9 F)
1968
-28.9 C (-20.0 F)
1969
-27.8 C (-18.0 F)
1970
-33.9 C (-29.0 F)
1971
-32.8 C (-27.0 F)
1972
-31.1 C (-24.0 F)
1973
-28.3 C (-18.9 F)
1974
-32.2 C (-26.0 F)
1975
-29.4 C (-20.9 F)
1976
-29.4 C (-20.9 F)
1977
-32.2 C (-26.0 F)
1978
-27.8 C (-18.0 F)
1979
-33.3 C (-27.9 F)
1980
-24.4 C (-11.9 F)
1981
-27.2 C (-17.0 F)
1982
-32.2 C (-26.0 F)
1983
-32.2 C (-26.0 F)
1984
-28.3 C (-18.9 F)
1985
-32.2 C (-26.0 F)
1986
-31.1 C (-24.0 F)
1987
-25.6 C (-14.1 F)
1988
-30.6 C (-23.1 F)
1989
-31.1 C (-24.0 F)
1990
-27.8 C (-18.0 F)
1991
-31.1 C (-24.0 F)
1992
-22.8 C (-9.0 F)
1993
-30.6 C (-23.1 F)
1994
-33.3 C (-27.9 F)
1995
-25.0 C (-13.0 F)
1996
-35.6 C (-32.1 F)
1997
-27.2 C (-17.0 F)
1998
-23.9 C (-11.0 F)
1999
-32.8 C (-27.0 F)
2000
-33.9 C (-29.0 F)
2001
-24.4 C (-11.9 F)
2002
-23.9 C (-11.0 F)
2003
-23.9 C (-11.0 F)
2004
-26.7 C (-16.1 F)
2005
-26.7 C (-16.1 F)
Wettest day (Rx1day)
The wettest day of the year at Oelwein 2 S, 1923 to 2005. The record is 182.6 mm (7.2 in) in 1989, marked on the chart; the median year is 58.9 mm (2.3 in).
Wettest day (Rx1day) at Oelwein 2 S by year
Year
Wettest day (Rx1day)
1923
64.8 mm (2.6 in)
1924
54.9 mm (2.2 in)
1925
165.1 mm (6.5 in)
1926
58.4 mm (2.3 in)
1927
61.0 mm (2.4 in)
1928
58.4 mm (2.3 in)
1929
78.7 mm (3.1 in)
1930
87.6 mm (3.4 in)
1931
77.5 mm (3.1 in)
1932
81.3 mm (3.2 in)
1933
52.1 mm (2.1 in)
1934
38.1 mm (1.5 in)
1935
40.6 mm (1.6 in)
1936
74.9 mm (2.9 in)
1937
48.3 mm (1.9 in)
1938
50.8 mm (2.0 in)
1939
36.8 mm (1.4 in)
1940
115.6 mm (4.6 in)
1941
108.0 mm (4.3 in)
1942
41.9 mm (1.6 in)
1943
50.8 mm (2.0 in)
1944
57.2 mm (2.3 in)
1945
69.9 mm (2.8 in)
1946
50.8 mm (2.0 in)
1947
61.2 mm (2.4 in)
1948
69.1 mm (2.7 in)
1949
98.3 mm (3.9 in)
1950
61.0 mm (2.4 in)
1951
91.4 mm (3.6 in)
1952
50.8 mm (2.0 in)
1953
40.6 mm (1.6 in)
1954
54.6 mm (2.1 in)
1955
36.3 mm (1.4 in)
1956
74.7 mm (2.9 in)
1957
51.6 mm (2.0 in)
1958
67.3 mm (2.6 in)
1959
73.4 mm (2.9 in)
1960
46.7 mm (1.8 in)
1961
85.1 mm (3.4 in)
1962
78.7 mm (3.1 in)
1963
117.6 mm (4.6 in)
1964
45.0 mm (1.8 in)
1965
40.6 mm (1.6 in)
1966
112.8 mm (4.4 in)
1967
66.8 mm (2.6 in)
1968
45.5 mm (1.8 in)
1969
59.2 mm (2.3 in)
1970
46.0 mm (1.8 in)
1971
33.5 mm (1.3 in)
1972
40.9 mm (1.6 in)
1973
55.9 mm (2.2 in)
1974
49.5 mm (1.9 in)
1975
38.9 mm (1.5 in)
1976
83.8 mm (3.3 in)
1977
58.7 mm (2.3 in)
1978
48.0 mm (1.9 in)
1979
84.8 mm (3.3 in)
1980
61.5 mm (2.4 in)
1981
162.1 mm (6.4 in)
1982
65.0 mm (2.6 in)
1983
47.5 mm (1.9 in)
1984
43.4 mm (1.7 in)
1985
55.4 mm (2.2 in)
1986
54.4 mm (2.1 in)
1987
58.7 mm (2.3 in)
1988
65.0 mm (2.6 in)
1989
182.6 mm (7.2 in)
1990
64.5 mm (2.5 in)
1991
60.5 mm (2.4 in)
1992
41.4 mm (1.6 in)
1993
76.2 mm (3.0 in)
1994
58.9 mm (2.3 in)
1995
47.0 mm (1.9 in)
1996
46.0 mm (1.8 in)
1997
57.4 mm (2.3 in)
1998
51.1 mm (2.0 in)
1999
111.3 mm (4.4 in)
2000
79.0 mm (3.1 in)
2001
66.0 mm (2.6 in)
2002
54.6 mm (2.1 in)
2003
63.5 mm (2.5 in)
2004
96.8 mm (3.8 in)
2005
61.0 mm (2.4 in)
Wettest five days (Rx5day)
The wettest five days of the year at Oelwein 2 S, 1923 to 2005. The record is 221.0 mm (8.7 in) in 1925, marked on the chart; the median year is 92.7 mm (3.6 in).
Wettest five days (Rx5day) at Oelwein 2 S by year
Year
Wettest five days (Rx5day)
1923
107.0 mm (4.2 in)
1924
85.9 mm (3.4 in)
1925
221.0 mm (8.7 in)
1926
99.0 mm (3.9 in)
1927
100.4 mm (4.0 in)
1928
111.8 mm (4.4 in)
1929
101.5 mm (4.0 in)
1930
105.3 mm (4.1 in)
1931
105.5 mm (4.2 in)
1932
90.2 mm (3.6 in)
1933
92.7 mm (3.6 in)
1934
95.2 mm (3.7 in)
1935
68.6 mm (2.7 in)
1936
86.3 mm (3.4 in)
1937
64.8 mm (2.6 in)
1938
108.0 mm (4.3 in)
1939
68.5 mm (2.7 in)
1940
138.5 mm (5.5 in)
1941
135.1 mm (5.3 in)
1942
92.5 mm (3.6 in)
1943
99.1 mm (3.9 in)
1944
68.1 mm (2.7 in)
1945
107.7 mm (4.2 in)
1946
87.6 mm (3.4 in)
1947
110.7 mm (4.4 in)
1948
89.9 mm (3.5 in)
1949
103.4 mm (4.1 in)
1950
71.2 mm (2.8 in)
1951
91.4 mm (3.6 in)
1952
58.4 mm (2.3 in)
1953
59.2 mm (2.3 in)
1954
56.2 mm (2.2 in)
1955
77.4 mm (3.0 in)
1956
83.4 mm (3.3 in)
1957
63.3 mm (2.5 in)
1958
91.7 mm (3.6 in)
1959
194.0 mm (7.6 in)
1960
84.0 mm (3.3 in)
1961
104.6 mm (4.1 in)
1962
107.2 mm (4.2 in)
1963
135.9 mm (5.4 in)
1964
68.1 mm (2.7 in)
1965
86.6 mm (3.4 in)
1966
112.8 mm (4.4 in)
1967
102.6 mm (4.0 in)
1968
99.9 mm (3.9 in)
1969
106.6 mm (4.2 in)
1970
128.6 mm (5.1 in)
1971
65.3 mm (2.6 in)
1972
70.6 mm (2.8 in)
1973
77.1 mm (3.0 in)
1974
73.9 mm (2.9 in)
1975
54.9 mm (2.2 in)
1976
83.8 mm (3.3 in)
1977
89.2 mm (3.5 in)
1978
86.2 mm (3.4 in)
1979
98.1 mm (3.9 in)
1980
106.5 mm (4.2 in)
1981
173.8 mm (6.8 in)
1982
82.6 mm (3.3 in)
1983
99.3 mm (3.9 in)
1984
65.0 mm (2.6 in)
1985
77.7 mm (3.1 in)
1986
82.0 mm (3.2 in)
1987
67.6 mm (2.7 in)
1988
91.2 mm (3.6 in)
1989
199.1 mm (7.8 in)
1990
105.9 mm (4.2 in)
1991
107.7 mm (4.2 in)
1992
66.2 mm (2.6 in)
1993
105.4 mm (4.1 in)
1994
102.9 mm (4.1 in)
1995
109.5 mm (4.3 in)
1996
57.9 mm (2.3 in)
1997
87.9 mm (3.5 in)
1998
96.8 mm (3.8 in)
1999
142.6 mm (5.6 in)
2000
94.2 mm (3.7 in)
2001
108.3 mm (4.3 in)
2002
78.9 mm (3.1 in)
2003
88.4 mm (3.5 in)
2004
141.8 mm (5.6 in)
2005
113.3 mm (4.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Oelwein 2 S, 1923 to 2005. The record is 55 days in 1952, marked on the chart; the median year is 22 days.
Longest dry spell (CDD) at Oelwein 2 S by year
Year
Longest dry spell (CDD)
1923
17 days
1924
22 days
1925
21 days
1926
29 days
1927
39 days
1928
28 days
1929
30 days
1930
22 days
1931
44 days
1932
21 days
1933
27 days
1934
44 days
1935
25 days
1936
26 days
1937
20 days
1938
16 days
1939
22 days
1940
20 days
1941
22 days
1942
38 days
1943
28 days
1944
27 days
1945
22 days
1946
34 days
1947
38 days
1948
27 days
1949
35 days
1950
30 days
1951
22 days
1952
55 days
1953
31 days
1954
27 days
1955
18 days
1956
26 days
1957
18 days
1958
34 days
1959
25 days
1960
17 days
1961
23 days
1962
20 days
1963
22 days
1964
34 days
1965
20 days
1966
26 days
1967
23 days
1968
34 days
1969
26 days
1970
20 days
1971
18 days
1972
22 days
1973
18 days
1974
14 days
1975
24 days
1976
27 days
1977
18 days
1978
21 days
1979
20 days
1980
30 days
1981
29 days
1982
18 days
1983
21 days
1984
21 days
1985
15 days
1986
27 days
1987
29 days
1988
36 days
1989
20 days
1990
19 days
1991
22 days
1992
25 days
1993
22 days
1994
22 days
1995
18 days
1996
28 days
1997
17 days
1998
19 days
1999
33 days
2000
17 days
2001
18 days
2002
40 days
2003
23 days
2004
18 days
2005
18 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
67 years with a frost
Across 67 years with a frost, the median last spring frost at Oelwein 2 S falls on 3 May and the median first autumn frost on 3 October, which leaves a median of 154 days between them.
In 1966 to 2004 the median growing season was 153 days. That is 1 day fewer than in 1924 to 1958.
Fitted over all years, the growing season changes by +0.3 days per decade at this station.
Frost dates and growing season at Oelwein 2 S
Measure
Median, all years
Earliest period (1924 to 1958)
Recent period (1966 to 2004)
Recent against earliest
Fitted trend
Last spring frost
3 May
3 May
3 May
no change
-0.7 days per decade
First autumn frost
3 October
1 October
4 October
3 days later
-0.4 days per decade
Growing days
154 days
154 days
153 days
1 day fewer
+0.3 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
72 years, 1926 to 2004
A day with at least 59.6 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 174.8 mm (6.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Oelwein 2 S: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
59.6 mm (2.3 in)
5 years
81.1 mm (3.2 in)
10 years
98.5 mm (3.9 in)
25 years
124.9 mm (4.9 in)
50 years
148.1 mm (5.8 in)
100 years
174.8 mm (6.9 in)
Longer than the 72 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, 72 years of values from 1926 to 2004.
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: 182.6 mm (7.2 in) in 1989; 162.1 mm (6.4 in) in 1981; 117.6 mm (4.6 in) in 1963.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Oelwein 2 S standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Oelwein 2 S 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.