Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Morden. 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 Morden, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
11.1 C (52.0 F)
-41.7 C (-43.1 F)
n/a
n/a
Feb
13.9 C (57.0 F)
-41.7 C (-43.1 F)
n/a
n/a
Mar
28.3 C (82.9 F)
-35.6 C (-32.1 F)
n/a
n/a
Apr
35.0 C (95.0 F)
-22.2 C (-8.0 F)
n/a
n/a
May
41.1 C (106.0 F)
-13.3 C (8.1 F)
n/a
n/a
Jun
39.4 C (102.9 F)
-2.2 C (28.0 F)
n/a
n/a
Jul
43.9 C (111.0 F)
2.2 C (36.0 F)
n/a
n/a
Aug
40.0 C (104.0 F)
-2.8 C (27.0 F)
n/a
n/a
Sep
40.0 C (104.0 F)
-6.7 C (19.9 F)
n/a
n/a
Oct
32.2 C (90.0 F)
-18.9 C (-2.0 F)
n/a
n/a
Nov
22.2 C (72.0 F)
-33.9 C (-29.0 F)
n/a
n/a
Dec
14.4 C (57.9 F)
-37.2 C (-35.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Morden still stand. 1919 holds the most, with 65.
Standing records at Morden by the year they were set
Year set
Standing records
1904
25
1905
38
1906
43
1907
34
1908
32
1909
25
1910
50
1911
34
1912
29
1913
35
1914
54
1915
33
1916
36
1917
49
1918
36
1919
65
1920
28
1921
27
1922
16
1923
6
1924
9
1925
15
1926
11
1927
9
1928
9
1929
15
1930
4
1931
21
1932
6
1933
9
1934
18
1935
12
1936
32
1937
12
1938
9
1939
12
1940
12
1941
13
1942
8
1943
6
1944
4
1945
13
1946
11
1947
16
1948
11
1949
16
1950
16
1951
21
1952
31
1953
28
1954
23
1955
25
1956
17
1957
12
1958
36
1959
16
1960
7
1961
23
1962
24
1963
27
1964
38
1965
19
1966
25
1967
21
1968
24
1969
15
1970
6
1971
2
All-Time Record Progression
4 new records
4 all-time records were set at Morden between 30 May 1934 and 12 July 1936. Each dot is a new record.
When Morden set new all-time records
Date
Kind
Detail
1934-05-30
Record high maximum temperature
Record high maximum temperature 41.1 C (106.0 F)
1936-07-07
Record high maximum temperature
Record high maximum temperature 41.7 C (107.1 F)
1936-07-11
Record high maximum temperature
Record high maximum temperature 43.9 C (111.0 F)
1936-07-12
Record high minimum temperature
Record high minimum temperature 25.0 C (77.0 F)
Wettest Day of Each Month
Aug: 142.7 mm (5.6 in)
The wettest day on record for each calendar month at Morden. The most was 142.7 mm (5.6 in) on 6 August 1891.
Record daily precipitation for each month at Morden
Month
Record daily precipitation (mm)
Date
Jan
35.6 mm (1.4 in)
29 January 1916
Feb
25.4 mm (1.0 in)
17 February 1914
Mar
51.1 mm (2.0 in)
13 March 1971
Apr
63.5 mm (2.5 in)
30 April 1896
May
82.6 mm (3.3 in)
24 May 1933
Jun
110.2 mm (4.3 in)
30 June 1893
Jul
106.7 mm (4.2 in)
22 July 1897
Aug
142.7 mm (5.6 in)
6 August 1891
Sep
57.2 mm (2.3 in)
4 September 1926
Oct
45.2 mm (1.8 in)
5 October 1924
Nov
40.9 mm (1.6 in)
8 November 1915
Dec
38.1 mm (1.5 in)
27 December 1916
Period of Record Coverage
1904 to 1971
Complete yearUnder 90 percent of days
68 years of record at Morden, 1904 to 1971. 32 years have data for under 90 percent of days and are left out of rankings: 1904, 1922, 1923, 1924, 1925, 1926, 1927, 1928 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 35 complete years at Morden, 1905 to 1970. Blue stripes are years cooler than the station's own mean of 3.1 C (37.5 F); red stripes are warmer. The coolest year was 1917, at 1.3 C (34.3 F), and the warmest was 1952, at 5.0 C (41.0 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Morden as warming stripes, 1905 to 1970
Year
Annual mean temperature
Difference from the station mean
1905
3.3 C
+0.21 C
1906
3.5 C
+0.42 C
1907
1.7 C
-1.42 C
1909
2.2 C
-0.91 C
1910
4.4 C
+1.36 C
1911
2.5 C
-0.61 C
1912
2.2 C
-0.87 C
1913
2.7 C
-0.40 C
1914
3.2 C
+0.08 C
1915
3.6 C
+0.53 C
1916
1.3 C
-1.77 C
1917
1.3 C
-1.79 C
1918
3.0 C
-0.06 C
1919
3.4 C
+0.34 C
1920
3.4 C
+0.28 C
1921
3.9 C
+0.79 C
1951
1.9 C
-1.13 C
1952
5.0 C
+1.92 C
1953
4.9 C
+1.83 C
1955
2.8 C
-0.24 C
1956
2.7 C
-0.40 C
1957
3.8 C
+0.74 C
1958
4.0 C
+0.93 C
1959
3.2 C
+0.11 C
1960
3.6 C
+0.48 C
1961
4.0 C
+0.94 C
1962
2.9 C
-0.14 C
1963
4.5 C
+1.45 C
1964
3.3 C
+0.19 C
1965
2.0 C
-1.06 C
1966
1.8 C
-1.24 C
1967
2.7 C
-0.36 C
1968
3.2 C
+0.13 C
1969
3.0 C
-0.09 C
1970
2.7 C
-0.34 C
The fitted trend in annual mean temperature here over 1905 to 1970 is 0.1 C (-0.1 to 0.2) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.4) per decade. The slope is a straight line fitted to 35 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Morden
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.1 to 0.2) per decade
0.1 F (-0.1 to 0.4) per decade
1905 to 1970
35
Not clearly different from zero
Mean daily maximum
-0.03 C (-0.20 to 0.13) per decade
-0.1 F (-0.4 to 0.2) per decade
1905 to 1970
35
Not clearly different from zero
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.3 F (0.1 to 0.5) per decade
1905 to 1970
35
Rise
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
1885 to 1971
Yearly extremes at Morden: 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)
68
Coldest night (TNn)
-41.7 C (-43.1 F)
1912
-32.5 C (-26.5 F)
68
Wettest day (Rx1day)
142.7 mm (5.6 in)
1891
43.2 mm (1.7 in)
87
Wettest five days (Rx5day)
169.2 mm (6.7 in)
1928
67.6 mm (2.7 in)
87
Longest dry spell (CDD)
58 days
1915
28 days
87
Hottest day (TXx)
The hottest day of the year at Morden, 1885 to 1971. 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 Morden by year
Year
Hottest day (TXx)
1885
n/a
1886
n/a
1887
n/a
1888
n/a
1889
n/a
1890
n/a
1891
n/a
1892
n/a
1893
n/a
1894
n/a
1895
n/a
1896
n/a
1897
n/a
1898
n/a
1899
n/a
1900
n/a
1901
n/a
1902
n/a
1903
n/a
1904
30.0 C (86.0 F)
1905
32.2 C (90.0 F)
1906
40.0 C (104.0 F)
1907
34.4 C (93.9 F)
1908
33.9 C (93.0 F)
1909
34.4 C (93.9 F)
1910
39.4 C (102.9 F)
1911
34.4 C (93.9 F)
1912
36.7 C (98.1 F)
1913
34.4 C (93.9 F)
1914
37.8 C (100.0 F)
1915
35.6 C (96.1 F)
1916
36.7 C (98.1 F)
1917
36.7 C (98.1 F)
1918
33.9 C (93.0 F)
1919
38.3 C (100.9 F)
1920
37.2 C (99.0 F)
1921
37.2 C (99.0 F)
1922
36.7 C (98.1 F)
1923
35.6 C (96.1 F)
1924
32.2 C (90.0 F)
1925
33.9 C (93.0 F)
1926
35.0 C (95.0 F)
1927
30.6 C (87.1 F)
1928
33.9 C (93.0 F)
1929
37.2 C (99.0 F)
1930
32.2 C (90.0 F)
1931
38.3 C (100.9 F)
1932
35.0 C (95.0 F)
1933
37.2 C (99.0 F)
1934
41.1 C (106.0 F)
1935
36.7 C (98.1 F)
1936
43.9 C (111.0 F)
1937
36.1 C (97.0 F)
1938
35.0 C (95.0 F)
1939
38.9 C (102.0 F)
1940
36.7 C (98.1 F)
1941
36.7 C (98.1 F)
1942
35.6 C (96.1 F)
1943
32.8 C (91.0 F)
1944
35.0 C (95.0 F)
1945
36.1 C (97.0 F)
1946
37.8 C (100.0 F)
1947
37.2 C (99.0 F)
1948
35.0 C (95.0 F)
1949
40.0 C (104.0 F)
1950
32.8 C (91.0 F)
1951
36.7 C (98.1 F)
1952
37.2 C (99.0 F)
1953
36.1 C (97.0 F)
1954
34.4 C (93.9 F)
1955
37.8 C (100.0 F)
1956
33.9 C (93.0 F)
1957
33.9 C (93.0 F)
1958
36.1 C (97.0 F)
1959
38.3 C (100.9 F)
1960
38.3 C (100.9 F)
1961
38.3 C (100.9 F)
1962
33.3 C (91.9 F)
1963
32.8 C (91.0 F)
1964
40.0 C (104.0 F)
1965
37.2 C (99.0 F)
1966
33.9 C (93.0 F)
1967
35.6 C (96.1 F)
1968
35.6 C (96.1 F)
1969
36.1 C (97.0 F)
1970
36.1 C (97.0 F)
1971
32.2 C (90.0 F)
Coldest night (TNn)
The coldest night of the year at Morden, 1885 to 1971. The record is -41.7 C (-43.1 F) in 1912, marked on the chart; the median year is -32.5 C (-26.5 F).
Coldest night (TNn) at Morden by year
Year
Coldest night (TNn)
1885
n/a
1886
n/a
1887
n/a
1888
n/a
1889
n/a
1890
n/a
1891
n/a
1892
n/a
1893
n/a
1894
n/a
1895
n/a
1896
n/a
1897
n/a
1898
n/a
1899
n/a
1900
n/a
1901
n/a
1902
n/a
1903
n/a
1904
-33.9 C (-29.0 F)
1905
-38.3 C (-36.9 F)
1906
-33.3 C (-27.9 F)
1907
-36.7 C (-34.1 F)
1908
-37.8 C (-36.0 F)
1909
-40.6 C (-41.1 F)
1910
-37.2 C (-35.0 F)
1911
-36.7 C (-34.1 F)
1912
-41.7 C (-43.1 F)
1913
-35.0 C (-31.0 F)
1914
-41.7 C (-43.1 F)
1915
-40.0 C (-40.0 F)
1916
-40.6 C (-41.1 F)
1917
-38.9 C (-38.0 F)
1918
-38.9 C (-38.0 F)
1919
-35.0 C (-31.0 F)
1920
-38.3 C (-36.9 F)
1921
-32.8 C (-27.0 F)
1922
-35.0 C (-31.0 F)
1923
-15.6 C (3.9 F)
1924
-11.7 C (10.9 F)
1925
-16.1 C (3.0 F)
1926
-12.8 C (9.0 F)
1927
-9.4 C (15.1 F)
1928
-13.9 C (7.0 F)
1929
-9.4 C (15.1 F)
1930
-11.7 C (10.9 F)
1931
-11.7 C (10.9 F)
1932
-17.8 C (0.0 F)
1933
-11.1 C (12.0 F)
1934
-7.2 C (19.0 F)
1935
-13.9 C (7.0 F)
1936
-21.1 C (-6.0 F)
1937
-10.6 C (12.9 F)
1938
-13.3 C (8.1 F)
1939
-13.9 C (7.0 F)
1940
-17.8 C (0.0 F)
1941
-12.8 C (9.0 F)
1942
-10.6 C (12.9 F)
1943
-11.1 C (12.0 F)
1944
-14.4 C (6.1 F)
1945
-10.0 C (14.0 F)
1946
-9.4 C (15.1 F)
1947
-8.9 C (16.0 F)
1948
-16.7 C (1.9 F)
1949
-11.1 C (12.0 F)
1950
-30.0 C (-22.0 F)
1951
-35.6 C (-32.1 F)
1952
-32.2 C (-26.0 F)
1953
-30.0 C (-22.0 F)
1954
-34.4 C (-29.9 F)
1955
-32.8 C (-27.0 F)
1956
-32.8 C (-27.0 F)
1957
-32.8 C (-27.0 F)
1958
-32.2 C (-26.0 F)
1959
-33.3 C (-27.9 F)
1960
-30.6 C (-23.1 F)
1961
-33.9 C (-29.0 F)
1962
-35.6 C (-32.1 F)
1963
-35.0 C (-31.0 F)
1964
-32.8 C (-27.0 F)
1965
-32.8 C (-27.0 F)
1966
-38.9 C (-38.0 F)
1967
-36.1 C (-33.0 F)
1968
-36.7 C (-34.1 F)
1969
-31.1 C (-24.0 F)
1970
-33.9 C (-29.0 F)
1971
-31.7 C (-25.1 F)
Wettest day (Rx1day)
The wettest day of the year at Morden, 1885 to 1971. The record is 142.7 mm (5.6 in) in 1891, marked on the chart; the median year is 43.2 mm (1.7 in).
Wettest day (Rx1day) at Morden by year
Year
Wettest day (Rx1day)
1885
55.6 mm (2.2 in)
1886
8.9 mm (0.35 in)
1887
12.7 mm (0.5 in)
1888
28.2 mm (1.1 in)
1889
51.6 mm (2.0 in)
1890
48.0 mm (1.9 in)
1891
142.7 mm (5.6 in)
1892
53.3 mm (2.1 in)
1893
110.2 mm (4.3 in)
1894
47.5 mm (1.9 in)
1895
22.9 mm (0.9 in)
1896
64.0 mm (2.5 in)
1897
106.7 mm (4.2 in)
1898
68.6 mm (2.7 in)
1899
40.6 mm (1.6 in)
1900
37.3 mm (1.5 in)
1901
58.4 mm (2.3 in)
1902
35.1 mm (1.4 in)
1903
27.9 mm (1.1 in)
1904
69.9 mm (2.8 in)
1905
50.0 mm (2.0 in)
1906
30.2 mm (1.2 in)
1907
17.8 mm (0.7 in)
1908
52.1 mm (2.1 in)
1909
38.1 mm (1.5 in)
1910
43.2 mm (1.7 in)
1911
33.0 mm (1.3 in)
1912
27.4 mm (1.1 in)
1913
33.5 mm (1.3 in)
1914
33.5 mm (1.3 in)
1915
43.2 mm (1.7 in)
1916
45.7 mm (1.8 in)
1917
26.9 mm (1.1 in)
1918
43.2 mm (1.7 in)
1919
91.4 mm (3.6 in)
1920
30.5 mm (1.2 in)
1921
104.1 mm (4.1 in)
1922
35.6 mm (1.4 in)
1923
40.1 mm (1.6 in)
1924
54.6 mm (2.1 in)
1925
40.6 mm (1.6 in)
1926
57.2 mm (2.3 in)
1927
45.7 mm (1.8 in)
1928
86.4 mm (3.4 in)
1929
36.8 mm (1.4 in)
1930
38.1 mm (1.5 in)
1931
32.0 mm (1.3 in)
1932
32.8 mm (1.3 in)
1933
82.6 mm (3.3 in)
1934
24.4 mm (1.0 in)
1935
50.8 mm (2.0 in)
1936
45.0 mm (1.8 in)
1937
64.0 mm (2.5 in)
1938
37.6 mm (1.5 in)
1939
38.1 mm (1.5 in)
1940
46.0 mm (1.8 in)
1941
50.8 mm (2.0 in)
1942
38.1 mm (1.5 in)
1943
59.4 mm (2.3 in)
1944
73.9 mm (2.9 in)
1945
36.8 mm (1.4 in)
1946
38.9 mm (1.5 in)
1947
68.6 mm (2.7 in)
1948
45.2 mm (1.8 in)
1949
34.3 mm (1.4 in)
1950
36.8 mm (1.4 in)
1951
41.1 mm (1.6 in)
1952
42.2 mm (1.7 in)
1953
34.0 mm (1.3 in)
1954
33.0 mm (1.3 in)
1955
64.8 mm (2.6 in)
1956
62.2 mm (2.4 in)
1957
71.6 mm (2.8 in)
1958
28.4 mm (1.1 in)
1959
30.7 mm (1.2 in)
1960
34.5 mm (1.4 in)
1961
22.4 mm (0.9 in)
1962
53.6 mm (2.1 in)
1963
68.3 mm (2.7 in)
1964
55.9 mm (2.2 in)
1965
29.2 mm (1.1 in)
1966
49.5 mm (1.9 in)
1967
37.3 mm (1.5 in)
1968
86.9 mm (3.4 in)
1969
42.4 mm (1.7 in)
1970
46.0 mm (1.8 in)
1971
51.1 mm (2.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Morden, 1885 to 1971. The record is 169.2 mm (6.7 in) in 1928, marked on the chart; the median year is 67.6 mm (2.7 in).
Wettest five days (Rx5day) at Morden by year
Year
Wettest five days (Rx5day)
1885
75.2 mm (3.0 in)
1886
10.9 mm (0.4 in)
1887
12.7 mm (0.5 in)
1888
47.0 mm (1.9 in)
1889
89.7 mm (3.5 in)
1890
65.2 mm (2.6 in)
1891
142.7 mm (5.6 in)
1892
78.7 mm (3.1 in)
1893
117.9 mm (4.6 in)
1894
67.6 mm (2.7 in)
1895
38.1 mm (1.5 in)
1896
83.8 mm (3.3 in)
1897
118.6 mm (4.7 in)
1898
68.6 mm (2.7 in)
1899
50.8 mm (2.0 in)
1900
55.0 mm (2.2 in)
1901
91.9 mm (3.6 in)
1902
69.1 mm (2.7 in)
1903
34.8 mm (1.4 in)
1904
98.9 mm (3.9 in)
1905
69.8 mm (2.7 in)
1906
53.4 mm (2.1 in)
1907
30.5 mm (1.2 in)
1908
71.2 mm (2.8 in)
1909
52.0 mm (2.0 in)
1910
54.6 mm (2.1 in)
1911
52.6 mm (2.1 in)
1912
44.9 mm (1.8 in)
1913
43.4 mm (1.7 in)
1914
66.0 mm (2.6 in)
1915
58.7 mm (2.3 in)
1916
121.9 mm (4.8 in)
1917
31.0 mm (1.2 in)
1918
68.3 mm (2.7 in)
1919
119.3 mm (4.7 in)
1920
33.5 mm (1.3 in)
1921
115.5 mm (4.5 in)
1922
58.7 mm (2.3 in)
1923
61.2 mm (2.4 in)
1924
73.1 mm (2.9 in)
1925
63.0 mm (2.5 in)
1926
107.9 mm (4.2 in)
1927
85.3 mm (3.4 in)
1928
169.2 mm (6.7 in)
1929
36.8 mm (1.4 in)
1930
48.8 mm (1.9 in)
1931
45.7 mm (1.8 in)
1932
46.8 mm (1.8 in)
1933
83.6 mm (3.3 in)
1934
48.3 mm (1.9 in)
1935
53.6 mm (2.1 in)
1936
49.3 mm (1.9 in)
1937
113.0 mm (4.4 in)
1938
40.2 mm (1.6 in)
1939
41.2 mm (1.6 in)
1940
68.1 mm (2.7 in)
1941
109.7 mm (4.3 in)
1942
59.1 mm (2.3 in)
1943
83.6 mm (3.3 in)
1944
133.6 mm (5.3 in)
1945
55.9 mm (2.2 in)
1946
62.3 mm (2.5 in)
1947
101.3 mm (4.0 in)
1948
53.3 mm (2.1 in)
1949
53.1 mm (2.1 in)
1950
74.4 mm (2.9 in)
1951
76.2 mm (3.0 in)
1952
54.4 mm (2.1 in)
1953
52.0 mm (2.0 in)
1954
56.3 mm (2.2 in)
1955
90.2 mm (3.6 in)
1956
89.9 mm (3.5 in)
1957
76.0 mm (3.0 in)
1958
68.2 mm (2.7 in)
1959
67.6 mm (2.7 in)
1960
49.5 mm (1.9 in)
1961
57.5 mm (2.3 in)
1962
71.8 mm (2.8 in)
1963
113.6 mm (4.5 in)
1964
95.3 mm (3.8 in)
1965
51.3 mm (2.0 in)
1966
95.3 mm (3.8 in)
1967
86.6 mm (3.4 in)
1968
91.2 mm (3.6 in)
1969
80.5 mm (3.2 in)
1970
63.5 mm (2.5 in)
1971
67.6 mm (2.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Morden, 1885 to 1971. The record is 58 days in 1915, marked on the chart; the median year is 28 days.
Longest dry spell (CDD) at Morden by year
Year
Longest dry spell (CDD)
1885
35 days
1886
23 days
1887
25 days
1888
30 days
1889
25 days
1890
35 days
1891
28 days
1892
37 days
1893
35 days
1894
31 days
1895
46 days
1896
20 days
1897
28 days
1898
42 days
1899
37 days
1900
34 days
1901
32 days
1902
35 days
1903
43 days
1904
33 days
1905
35 days
1906
35 days
1907
24 days
1908
24 days
1909
29 days
1910
24 days
1911
25 days
1912
47 days
1913
47 days
1914
36 days
1915
58 days
1916
20 days
1917
26 days
1918
21 days
1919
22 days
1920
42 days
1921
49 days
1922
29 days
1923
22 days
1924
20 days
1925
31 days
1926
23 days
1927
28 days
1928
25 days
1929
24 days
1930
30 days
1931
38 days
1932
23 days
1933
42 days
1934
21 days
1935
16 days
1936
25 days
1937
34 days
1938
57 days
1939
20 days
1940
24 days
1941
21 days
1942
27 days
1943
49 days
1944
28 days
1945
15 days
1946
24 days
1947
18 days
1948
25 days
1949
21 days
1950
15 days
1951
19 days
1952
47 days
1953
23 days
1954
18 days
1955
25 days
1956
33 days
1957
29 days
1958
21 days
1959
17 days
1960
38 days
1961
40 days
1962
21 days
1963
33 days
1964
39 days
1965
30 days
1966
18 days
1967
28 days
1968
19 days
1969
47 days
1970
26 days
1971
30 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
35 years with a frost
Across 35 years with a frost, the median last spring frost at Morden falls on 20 May and the median first autumn frost on 23 September, which leaves a median of 123 days between them.
Fitted over all years, the growing season changes by +2.3 days per decade at this station.
Frost dates and growing season at Morden
Measure
Median, all years
Earliest period
Recent period (1911 to 1970)
Recent against earliest
Fitted trend
Last spring frost
20 May
n/a
20 May
n/a
-1.1 days per decade
First autumn frost
23 September
n/a
23 September
n/a
+1.2 days per decade
Growing days
123 days
n/a
124 days
n/a
+2.3 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
48 years, 1888 to 1970
A day with at least 43.6 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 152.0 mm (6.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Morden: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
43.6 mm (1.7 in)
5 years
64.3 mm (2.5 in)
10 years
80.8 mm (3.2 in)
25 years
105.6 mm (4.2 in)
50 years
127.2 mm (5.0 in)
Longer than the 48 years of record
100 years
152.0 mm (6.0 in)
Longer than the 48 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, 48 years of values from 1888 to 1970.
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: 142.7 mm (5.6 in) in 1891; 110.2 mm (4.3 in) in 1893; 106.7 mm (4.2 in) in 1897.
Download the Data
Data for Morden standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Morden 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.