Record envelope, standing records and threshold days for Davenport L&D 15 (USW00014932), Iowa, United States, with 84 years of record.
Key Facts for Davenport L&D 15
Davenport L&D 15 (USW00014932) is a weather station in Iowa, United States at 41.52 latitude and -90.57 longitude, 173 m (568 ft) above sea level.
The station reports from 1901 to 1984, 84 years of record.
1,464 records set at Davenport L&D 15 still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Davenport L&D 15 tied a daily record low minimum temperature of 4.4 C (39.9 F) on 29 May 1984.
About the Station
Location: Iowa, United States, 41.52 latitude, -90.57 longitude.
Elevation: 173 m (568 ft).
Period of record: 1901 to 1984, 84 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 Davenport L&D 15. 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 Davenport L&D 15, 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)
-30.0 C (-22.0 F)
n/a
n/a
Feb
22.8 C (73.0 F)
-31.7 C (-25.1 F)
n/a
n/a
Mar
28.9 C (84.0 F)
-25.0 C (-13.0 F)
n/a
n/a
Apr
32.8 C (91.0 F)
-11.7 C (10.9 F)
n/a
n/a
May
39.4 C (102.9 F)
-1.7 C (28.9 F)
n/a
n/a
Jun
40.0 C (104.0 F)
3.9 C (39.0 F)
n/a
n/a
Jul
43.9 C (111.0 F)
10.0 C (50.0 F)
n/a
n/a
Aug
40.6 C (105.1 F)
4.4 C (39.9 F)
n/a
n/a
Sep
37.8 C (100.0 F)
-1.1 C (30.0 F)
n/a
n/a
Oct
33.3 C (91.9 F)
-11.7 C (10.9 F)
n/a
n/a
Nov
26.1 C (79.0 F)
-20.0 C (-4.0 F)
n/a
n/a
Dec
19.4 C (66.9 F)
-28.9 C (-20.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Davenport L&D 15 still stand. 1936 holds the most, with 54.
Standing records at Davenport L&D 15 by the year they were set
Year set
Standing records
1901
17
1902
33
1903
20
1904
16
1905
26
1906
18
1907
19
1908
12
1909
27
1910
23
1911
39
1912
18
1913
34
1914
25
1915
25
1916
23
1917
19
1918
33
1919
14
1920
18
1921
19
1922
14
1923
19
1924
27
1925
28
1926
18
1927
25
1928
24
1929
23
1930
43
1931
39
1932
17
1933
21
1934
37
1935
21
1936
54
1937
17
1938
15
1939
22
1940
21
1941
10
1942
18
1943
8
1948
10
1949
15
1950
31
1951
25
1952
14
1953
21
1954
11
1955
10
1956
6
1957
4
1958
11
1959
10
1960
13
1961
5
1962
25
1963
25
1964
8
1965
12
1966
10
1967
17
1968
10
1969
4
1970
13
1971
18
1972
11
1973
12
1974
17
1975
13
1976
8
1977
17
1978
5
1979
16
1980
4
1981
13
1982
11
1983
10
All-Time Record Progression
12 new records
12 all-time records were set at Davenport L&D 15 between 11 July 1936 and 16 January 1979. Each dot is a new record.
When Davenport L&D 15 set new all-time records
Date
Kind
Detail
1936-07-11
Record high maximum temperature
Record high maximum temperature 41.7 C (107.1 F)
1936-07-12
Record high maximum temperature
Record high maximum temperature 42.2 C (108.0 F)
1936-07-14
Record high maximum temperature
Record high maximum temperature 43.9 C (111.0 F)
1936-07-14
Record high minimum temperature
Record high minimum temperature 28.9 C (84.0 F)
1949-08-11
Record daily precipitation
Record daily precipitation 166.9 mm (6.6 in)
1960-02-24
Record snow depth
Record snow depth 40.6 cm (16.0 in)
1960-02-25
Record snow depth
Record snow depth 43.2 cm (17.0 in)
1979-01-13
Record daily snowfall
Record daily snowfall 30.5 cm (12.0 in)
1979-01-13
Record snow depth
Record snow depth 68.6 cm (27.0 in)
1979-01-14
Record snow depth
Record snow depth 71.1 cm (28.0 in)
1979-01-15
Record snow depth
Record snow depth 73.7 cm (29.0 in)
1979-01-16
Record snow depth
Record snow depth 76.2 cm (30.0 in)
Wettest Day of Each Month
Aug: 166.9 mm (6.6 in)
The wettest day on record for each calendar month at Davenport L&D 15. The most was 166.9 mm (6.6 in) on 11 August 1949.
Record daily precipitation for each month at Davenport L&D 15
Month
Record daily precipitation (mm)
Date
Jan
46.5 mm (1.8 in)
20 January 1904
Feb
46.2 mm (1.8 in)
24 February 1930
Mar
59.7 mm (2.4 in)
5 March 1976
Apr
70.9 mm (2.8 in)
26 April 1943
May
54.6 mm (2.1 in)
31 May 1954
Jun
115.3 mm (4.5 in)
15 June 1982
Jul
132.1 mm (5.2 in)
19 July 1963
Aug
166.9 mm (6.6 in)
11 August 1949
Sep
130.3 mm (5.1 in)
13 September 1961
Oct
99.3 mm (3.9 in)
10 October 1954
Nov
78.5 mm (3.1 in)
3 November 1935
Dec
68.6 mm (2.7 in)
26 December 1942
Period of Record Coverage
1901 to 1984
Complete yearUnder 90 percent of days
80 years of record at Davenport L&D 15, 1901 to 1984. 4 years have data for under 90 percent of days and are left out of rankings: 1943, 1948, 1980, 1984.
Cooler than the station meanWarmer than the station mean
One stripe for each of 72 complete years at Davenport L&D 15, 1901 to 1982. Blue stripes are years cooler than the station's own mean of 10.4 C (50.7 F); red stripes are warmer. The coolest year was 1917, at 8.3 C (46.9 F), and the warmest was 1931, at 13.0 C (55.3 F). The strongest colour marks a difference of 2.6 C (4.7 F).
Annual mean temperature at Davenport L&D 15 as warming stripes, 1901 to 1982
Year
Annual mean temperature
Difference from the station mean
1901
10.1 C
-0.30 C
1902
9.8 C
-0.60 C
1903
9.7 C
-0.72 C
1904
9.0 C
-1.43 C
1905
9.6 C
-0.78 C
1906
10.5 C
+0.09 C
1907
9.8 C
-0.63 C
1908
10.7 C
+0.27 C
1909
9.9 C
-0.54 C
1910
10.2 C
-0.15 C
1911
11.0 C
+0.57 C
1912
9.3 C
-1.10 C
1913
11.1 C
+0.72 C
1914
10.6 C
+0.21 C
1915
9.9 C
-0.46 C
1916
10.0 C
-0.41 C
1917
8.3 C
-2.13 C
1918
10.3 C
-0.05 C
1919
10.4 C
+0.05 C
1920
10.1 C
-0.30 C
1921
12.4 C
+1.99 C
1922
11.3 C
+0.95 C
1923
10.6 C
+0.18 C
1924
9.1 C
-1.31 C
1925
10.2 C
-0.22 C
1926
9.7 C
-0.73 C
1927
10.7 C
+0.27 C
1928
10.8 C
+0.41 C
1929
9.3 C
-1.06 C
1930
11.1 C
+0.69 C
1931
13.0 C
+2.56 C
1932
10.6 C
+0.16 C
1933
11.6 C
+1.19 C
1934
11.6 C
+1.23 C
1935
10.2 C
-0.16 C
1936
10.5 C
+0.15 C
1937
10.1 C
-0.30 C
1938
12.0 C
+1.58 C
1939
11.7 C
+1.34 C
1940
10.2 C
-0.20 C
1941
11.8 C
+1.37 C
1942
10.6 C
+0.24 C
1949
11.2 C
+0.83 C
1950
9.3 C
-1.07 C
1951
9.3 C
-1.14 C
1952
11.3 C
+0.86 C
1953
11.6 C
+1.16 C
1954
11.3 C
+0.89 C
1955
10.9 C
+0.46 C
1956
10.8 C
+0.44 C
1957
10.6 C
+0.18 C
1958
9.7 C
-0.73 C
1959
10.3 C
-0.14 C
1960
9.8 C
-0.63 C
1961
10.2 C
-0.23 C
1962
9.6 C
-0.84 C
1963
9.8 C
-0.55 C
1964
10.9 C
+0.53 C
1966
9.5 C
-0.85 C
1967
9.5 C
-0.86 C
1968
10.5 C
+0.10 C
1969
9.9 C
-0.45 C
1970
10.2 C
-0.24 C
1971
10.7 C
+0.28 C
1972
9.4 C
-0.98 C
1973
11.4 C
+1.04 C
1974
10.4 C
+0.03 C
1975
10.6 C
+0.24 C
1977
10.5 C
+0.15 C
1979
9.2 C
-1.17 C
1981
10.9 C
+0.48 C
1982
9.8 C
-0.62 C
The fitted trend in annual mean temperature here over 1901 to 1982 is 0.02 C (-0.07 to 0.10) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.03 F (-0.12 to 0.18) per decade. The slope is a straight line fitted to 72 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Davenport L&D 15
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.02 C (-0.07 to 0.10) per decade
0.03 F (-0.12 to 0.18) per decade
1901 to 1982
72
Not clearly different from zero
Mean daily maximum
0.01 C (-0.08 to 0.10) per decade
0.02 F (-0.14 to 0.17) per decade
1901 to 1982
72
Not clearly different from zero
Mean daily minimum
0.02 C (-0.06 to 0.11) per decade
0.04 F (-0.11 to 0.20) per decade
1901 to 1982
72
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
1901 to 1984
Yearly extremes at Davenport L&D 15: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
43.9 C (111.0 F)
1936
36.1 C (97.0 F)
80
Coldest night (TNn)
-31.7 C (-25.1 F)
1905
-23.9 C (-11.0 F)
80
Wettest day (Rx1day)
166.9 mm (6.6 in)
1949
57.3 mm (2.3 in)
80
Wettest five days (Rx5day)
183.9 mm (7.2 in)
1983
92.7 mm (3.6 in)
80
Longest dry spell (CDD)
54 days
1952
22 days
80
Hottest day (TXx)
The hottest day of the year at Davenport L&D 15, 1901 to 1984. The record is 43.9 C (111.0 F) in 1936, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Davenport L&D 15 by year
Year
Hottest day (TXx)
1901
41.1 C (106.0 F)
1902
33.3 C (91.9 F)
1903
35.0 C (95.0 F)
1904
33.3 C (91.9 F)
1905
34.4 C (93.9 F)
1906
34.4 C (93.9 F)
1907
35.0 C (95.0 F)
1908
35.0 C (95.0 F)
1909
35.6 C (96.1 F)
1910
37.2 C (99.0 F)
1911
40.0 C (104.0 F)
1912
36.1 C (97.0 F)
1913
38.9 C (102.0 F)
1914
37.8 C (100.0 F)
1915
32.8 C (91.0 F)
1916
40.0 C (104.0 F)
1917
36.7 C (98.1 F)
1918
38.3 C (100.9 F)
1919
35.6 C (96.1 F)
1920
35.6 C (96.1 F)
1921
38.3 C (100.9 F)
1922
37.8 C (100.0 F)
1923
37.2 C (99.0 F)
1924
33.9 C (93.0 F)
1925
37.2 C (99.0 F)
1926
35.6 C (96.1 F)
1927
36.1 C (97.0 F)
1928
34.4 C (93.9 F)
1929
36.7 C (98.1 F)
1930
40.6 C (105.1 F)
1931
40.0 C (104.0 F)
1932
36.7 C (98.1 F)
1933
37.8 C (100.0 F)
1934
41.1 C (106.0 F)
1935
37.2 C (99.0 F)
1936
43.9 C (111.0 F)
1937
37.2 C (99.0 F)
1938
36.1 C (97.0 F)
1939
37.2 C (99.0 F)
1940
39.4 C (102.9 F)
1941
38.3 C (100.9 F)
1942
35.6 C (96.1 F)
1943
30.6 C (87.1 F)
1948
37.8 C (100.0 F)
1949
36.1 C (97.0 F)
1950
33.3 C (91.9 F)
1951
35.0 C (95.0 F)
1952
35.6 C (96.1 F)
1953
36.7 C (98.1 F)
1954
36.1 C (97.0 F)
1955
37.2 C (99.0 F)
1956
37.8 C (100.0 F)
1957
35.6 C (96.1 F)
1958
32.8 C (91.0 F)
1959
36.1 C (97.0 F)
1960
36.1 C (97.0 F)
1961
33.3 C (91.9 F)
1962
34.4 C (93.9 F)
1963
35.6 C (96.1 F)
1964
35.6 C (96.1 F)
1965
35.0 C (95.0 F)
1966
36.7 C (98.1 F)
1967
32.8 C (91.0 F)
1968
36.1 C (97.0 F)
1969
35.0 C (95.0 F)
1970
36.1 C (97.0 F)
1971
36.1 C (97.0 F)
1972
35.0 C (95.0 F)
1973
35.6 C (96.1 F)
1974
36.1 C (97.0 F)
1975
35.6 C (96.1 F)
1976
35.6 C (96.1 F)
1977
36.7 C (98.1 F)
1978
35.6 C (96.1 F)
1979
36.1 C (97.0 F)
1980
36.7 C (98.1 F)
1981
35.6 C (96.1 F)
1982
35.6 C (96.1 F)
1983
37.8 C (100.0 F)
1984
30.6 C (87.1 F)
Coldest night (TNn)
The coldest night of the year at Davenport L&D 15, 1901 to 1984. The record is -31.7 C (-25.1 F) in 1905, marked on the chart; the median year is -23.9 C (-11.0 F).
Coldest night (TNn) at Davenport L&D 15 by year
Year
Coldest night (TNn)
1901
-25.0 C (-13.0 F)
1902
-25.0 C (-13.0 F)
1903
-26.1 C (-15.0 F)
1904
-25.0 C (-13.0 F)
1905
-31.7 C (-25.1 F)
1906
-17.8 C (0.0 F)
1907
-21.1 C (-6.0 F)
1908
-20.0 C (-4.0 F)
1909
-26.1 C (-15.0 F)
1910
-25.0 C (-13.0 F)
1911
-23.9 C (-11.0 F)
1912
-29.4 C (-20.9 F)
1913
-22.8 C (-9.0 F)
1914
-26.1 C (-15.0 F)
1915
-27.8 C (-18.0 F)
1916
-30.0 C (-22.0 F)
1917
-28.3 C (-18.9 F)
1918
-27.8 C (-18.0 F)
1919
-26.7 C (-16.1 F)
1920
-23.3 C (-9.9 F)
1921
-16.7 C (1.9 F)
1922
-20.6 C (-5.1 F)
1923
-23.3 C (-9.9 F)
1924
-29.4 C (-20.9 F)
1925
-23.9 C (-11.0 F)
1926
-22.8 C (-9.0 F)
1927
-24.4 C (-11.9 F)
1928
-22.8 C (-9.0 F)
1929
-23.9 C (-11.0 F)
1930
-27.8 C (-18.0 F)
1931
-15.0 C (5.0 F)
1932
-23.3 C (-9.9 F)
1933
-28.9 C (-20.0 F)
1934
-20.6 C (-5.1 F)
1935
-23.3 C (-9.9 F)
1936
-30.0 C (-22.0 F)
1937
-18.3 C (-0.9 F)
1938
-19.4 C (-2.9 F)
1939
-18.9 C (-2.0 F)
1940
-27.2 C (-17.0 F)
1941
-20.6 C (-5.1 F)
1942
-25.6 C (-14.1 F)
1943
-26.1 C (-15.0 F)
1948
-16.7 C (1.9 F)
1949
-21.1 C (-6.0 F)
1950
-21.7 C (-7.1 F)
1951
-25.6 C (-14.1 F)
1952
-20.6 C (-5.1 F)
1953
-20.6 C (-5.1 F)
1954
-22.2 C (-8.0 F)
1955
-23.3 C (-9.9 F)
1956
-22.8 C (-9.0 F)
1957
-22.8 C (-9.0 F)
1958
-23.9 C (-11.0 F)
1959
-22.8 C (-9.0 F)
1960
-21.1 C (-6.0 F)
1961
-23.9 C (-11.0 F)
1962
-25.0 C (-13.0 F)
1963
-28.3 C (-18.9 F)
1964
-19.4 C (-2.9 F)
1965
-23.3 C (-9.9 F)
1966
-28.9 C (-20.0 F)
1967
-25.0 C (-13.0 F)
1968
-24.4 C (-11.9 F)
1969
-22.2 C (-8.0 F)
1970
-27.8 C (-18.0 F)
1971
-22.2 C (-8.0 F)
1972
-26.7 C (-16.1 F)
1973
-19.4 C (-2.9 F)
1974
-26.7 C (-16.1 F)
1975
-22.2 C (-8.0 F)
1976
-24.4 C (-11.9 F)
1977
-28.3 C (-18.9 F)
1978
-23.3 C (-9.9 F)
1979
-28.3 C (-18.9 F)
1980
-20.0 C (-4.0 F)
1981
-23.3 C (-9.9 F)
1982
-30.0 C (-22.0 F)
1983
-17.8 C (0.0 F)
1984
-25.0 C (-13.0 F)
Wettest day (Rx1day)
The wettest day of the year at Davenport L&D 15, 1901 to 1984. The record is 166.9 mm (6.6 in) in 1949, marked on the chart; the median year is 57.3 mm (2.3 in).
Wettest day (Rx1day) at Davenport L&D 15 by year
Year
Wettest day (Rx1day)
1901
23.9 mm (0.9 in)
1902
72.6 mm (2.9 in)
1903
70.6 mm (2.8 in)
1904
52.6 mm (2.1 in)
1905
101.1 mm (4.0 in)
1906
49.3 mm (1.9 in)
1907
60.5 mm (2.4 in)
1908
76.5 mm (3.0 in)
1909
50.3 mm (2.0 in)
1910
51.1 mm (2.0 in)
1911
69.3 mm (2.7 in)
1912
53.3 mm (2.1 in)
1913
40.4 mm (1.6 in)
1914
81.8 mm (3.2 in)
1915
85.6 mm (3.4 in)
1916
34.3 mm (1.4 in)
1917
47.8 mm (1.9 in)
1918
51.3 mm (2.0 in)
1919
87.4 mm (3.4 in)
1920
43.4 mm (1.7 in)
1921
88.4 mm (3.5 in)
1922
35.3 mm (1.4 in)
1923
43.2 mm (1.7 in)
1924
66.8 mm (2.6 in)
1925
46.0 mm (1.8 in)
1926
47.5 mm (1.9 in)
1927
50.0 mm (2.0 in)
1928
53.1 mm (2.1 in)
1929
65.3 mm (2.6 in)
1930
112.5 mm (4.4 in)
1931
37.6 mm (1.5 in)
1932
65.5 mm (2.6 in)
1933
60.2 mm (2.4 in)
1934
44.7 mm (1.8 in)
1935
78.5 mm (3.1 in)
1936
55.1 mm (2.2 in)
1937
58.9 mm (2.3 in)
1938
91.2 mm (3.6 in)
1939
43.7 mm (1.7 in)
1940
42.4 mm (1.7 in)
1941
57.9 mm (2.3 in)
1942
68.6 mm (2.7 in)
1943
70.9 mm (2.8 in)
1948
73.7 mm (2.9 in)
1949
166.9 mm (6.6 in)
1950
70.9 mm (2.8 in)
1951
53.3 mm (2.1 in)
1952
74.9 mm (2.9 in)
1953
58.4 mm (2.3 in)
1954
99.3 mm (3.9 in)
1955
49.8 mm (2.0 in)
1956
41.7 mm (1.6 in)
1957
42.4 mm (1.7 in)
1958
35.8 mm (1.4 in)
1959
66.0 mm (2.6 in)
1960
40.6 mm (1.6 in)
1961
130.3 mm (5.1 in)
1962
68.6 mm (2.7 in)
1963
132.1 mm (5.2 in)
1964
70.1 mm (2.8 in)
1965
67.3 mm (2.6 in)
1966
56.6 mm (2.2 in)
1967
34.3 mm (1.4 in)
1968
50.8 mm (2.0 in)
1969
52.1 mm (2.1 in)
1970
71.6 mm (2.8 in)
1971
56.1 mm (2.2 in)
1972
45.2 mm (1.8 in)
1973
58.4 mm (2.3 in)
1974
40.6 mm (1.6 in)
1975
28.2 mm (1.1 in)
1976
59.7 mm (2.4 in)
1977
81.8 mm (3.2 in)
1978
47.0 mm (1.9 in)
1979
80.3 mm (3.2 in)
1980
51.1 mm (2.0 in)
1981
54.4 mm (2.1 in)
1982
115.3 mm (4.5 in)
1983
114.3 mm (4.5 in)
1984
27.7 mm (1.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Davenport L&D 15, 1901 to 1984. The record is 183.9 mm (7.2 in) in 1983, marked on the chart; the median year is 92.7 mm (3.6 in).
Wettest five days (Rx5day) at Davenport L&D 15 by year
Year
Wettest five days (Rx5day)
1901
44.2 mm (1.7 in)
1902
99.0 mm (3.9 in)
1903
105.9 mm (4.2 in)
1904
60.3 mm (2.4 in)
1905
144.0 mm (5.7 in)
1906
58.7 mm (2.3 in)
1907
120.7 mm (4.8 in)
1908
120.7 mm (4.8 in)
1909
74.7 mm (2.9 in)
1910
67.2 mm (2.6 in)
1911
84.0 mm (3.3 in)
1912
72.9 mm (2.9 in)
1913
60.8 mm (2.4 in)
1914
109.9 mm (4.3 in)
1915
104.4 mm (4.1 in)
1916
56.4 mm (2.2 in)
1917
100.6 mm (4.0 in)
1918
75.7 mm (3.0 in)
1919
138.7 mm (5.5 in)
1920
75.3 mm (3.0 in)
1921
123.2 mm (4.9 in)
1922
111.0 mm (4.4 in)
1923
85.4 mm (3.4 in)
1924
112.7 mm (4.4 in)
1925
114.2 mm (4.5 in)
1926
92.5 mm (3.6 in)
1927
83.5 mm (3.3 in)
1928
79.6 mm (3.1 in)
1929
69.0 mm (2.7 in)
1930
150.1 mm (5.9 in)
1931
59.0 mm (2.3 in)
1932
120.1 mm (4.7 in)
1933
60.7 mm (2.4 in)
1934
88.0 mm (3.5 in)
1935
111.6 mm (4.4 in)
1936
110.0 mm (4.3 in)
1937
109.5 mm (4.3 in)
1938
111.0 mm (4.4 in)
1939
89.0 mm (3.5 in)
1940
52.6 mm (2.1 in)
1941
97.2 mm (3.8 in)
1942
80.5 mm (3.2 in)
1943
102.4 mm (4.0 in)
1948
115.6 mm (4.6 in)
1949
172.4 mm (6.8 in)
1950
130.1 mm (5.1 in)
1951
98.1 mm (3.9 in)
1952
92.7 mm (3.6 in)
1953
82.7 mm (3.3 in)
1954
117.1 mm (4.6 in)
1955
84.9 mm (3.3 in)
1956
73.7 mm (2.9 in)
1957
70.6 mm (2.8 in)
1958
71.3 mm (2.8 in)
1959
109.2 mm (4.3 in)
1960
84.5 mm (3.3 in)
1961
157.0 mm (6.2 in)
1962
108.0 mm (4.3 in)
1963
140.5 mm (5.5 in)
1964
82.8 mm (3.3 in)
1965
139.4 mm (5.5 in)
1966
92.7 mm (3.6 in)
1967
73.6 mm (2.9 in)
1968
61.2 mm (2.4 in)
1969
82.1 mm (3.2 in)
1970
128.3 mm (5.1 in)
1971
90.1 mm (3.5 in)
1972
73.8 mm (2.9 in)
1973
101.6 mm (4.0 in)
1974
104.3 mm (4.1 in)
1975
47.0 mm (1.9 in)
1976
73.9 mm (2.9 in)
1977
144.3 mm (5.7 in)
1978
62.3 mm (2.5 in)
1979
179.1 mm (7.1 in)
1980
79.5 mm (3.1 in)
1981
100.4 mm (4.0 in)
1982
121.1 mm (4.8 in)
1983
183.9 mm (7.2 in)
1984
50.8 mm (2.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Davenport L&D 15, 1901 to 1984. The record is 54 days in 1952, marked on the chart; the median year is 22 days.
Longest dry spell (CDD) at Davenport L&D 15 by year
Year
Longest dry spell (CDD)
1901
24 days
1902
22 days
1903
30 days
1904
31 days
1905
22 days
1906
23 days
1907
22 days
1908
25 days
1909
16 days
1910
33 days
1911
18 days
1912
25 days
1913
30 days
1914
28 days
1915
27 days
1916
19 days
1917
27 days
1918
22 days
1919
41 days
1920
21 days
1921
15 days
1922
25 days
1923
17 days
1924
21 days
1925
22 days
1926
24 days
1927
20 days
1928
17 days
1929
17 days
1930
21 days
1931
28 days
1932
23 days
1933
27 days
1934
22 days
1935
17 days
1936
26 days
1937
15 days
1938
23 days
1939
29 days
1940
26 days
1941
18 days
1942
28 days
1943
17 days
1948
27 days
1949
22 days
1950
30 days
1951
10 days
1952
54 days
1953
23 days
1954
18 days
1955
14 days
1956
22 days
1957
29 days
1958
26 days
1959
19 days
1960
21 days
1961
15 days
1962
18 days
1963
25 days
1964
35 days
1965
20 days
1966
19 days
1967
26 days
1968
30 days
1969
19 days
1970
16 days
1971
24 days
1972
21 days
1973
14 days
1974
22 days
1975
14 days
1976
26 days
1977
17 days
1978
18 days
1979
39 days
1980
23 days
1981
31 days
1982
18 days
1983
12 days
1984
23 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
72 years with a frost
Across 72 years with a frost, the median last spring frost at Davenport L&D 15 falls on 14 April and the median first autumn frost on 25 October, which leaves a median of 192 days between them.
In 1949 to 1982 the median growing season was 195 days. That is 6 days more than in 1901 to 1930.
Fitted over all years, the growing season changes by +2.0 days per decade at this station.
Frost dates and growing season at Davenport L&D 15
Measure
Median, all years
Earliest period (1901 to 1930)
Recent period (1949 to 1982)
Recent against earliest
Fitted trend
Last spring frost
14 April
18 April
13 April
5 days earlier
-0.7 days per decade
First autumn frost
25 October
22 October
28 October
6 days later
+1.3 days per decade
Growing days
192 days
189 days
195 days
6 days more
+2.0 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
76 years, 1901 to 1983
A day with at least 57.5 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 159.4 mm (6.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Davenport L&D 15: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
57.5 mm (2.3 in)
5 years
79.0 mm (3.1 in)
10 years
95.3 mm (3.8 in)
25 years
118.6 mm (4.7 in)
50 years
138.1 mm (5.4 in)
100 years
159.4 mm (6.3 in)
Longer than the 76 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, 76 years of values from 1901 to 1983.
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: 166.9 mm (6.6 in) in 1949; 132.1 mm (5.2 in) in 1963; 130.3 mm (5.1 in) in 1961.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Davenport L&D 15 standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Davenport L&D 15 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.