Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at St Albans. 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 St Albans, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
8.3 C (46.9 F)
-44.4 C (-47.9 F)
n/a
n/a
Feb
12.8 C (55.0 F)
-44.4 C (-47.9 F)
n/a
n/a
Mar
26.7 C (80.1 F)
-41.1 C (-42.0 F)
n/a
n/a
Apr
33.9 C (93.0 F)
-25.0 C (-13.0 F)
n/a
n/a
May
38.9 C (102.0 F)
-13.3 C (8.1 F)
n/a
n/a
Jun
42.8 C (109.0 F)
-3.9 C (25.0 F)
n/a
n/a
Jul
44.4 C (111.9 F)
0.6 C (33.1 F)
n/a
n/a
Aug
42.2 C (108.0 F)
-3.9 C (25.0 F)
n/a
n/a
Sep
38.9 C (102.0 F)
-11.1 C (12.0 F)
n/a
n/a
Oct
33.3 C (91.9 F)
-23.9 C (-11.0 F)
n/a
n/a
Nov
22.8 C (73.0 F)
-35.6 C (-32.1 F)
n/a
n/a
Dec
15.6 C (60.1 F)
-44.4 C (-47.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at St Albans still stand. 1936 holds the most, with 42.
Standing records at St Albans by the year they were set
Year set
Standing records
1885
13
1886
38
1887
27
1888
36
1889
17
1890
21
1891
27
1892
29
1893
30
1894
19
1895
21
1896
19
1897
24
1898
13
1899
26
1900
31
1901
19
1902
11
1903
18
1904
18
1905
16
1906
16
1907
17
1908
23
1909
14
1910
28
1911
19
1912
17
1913
13
1914
29
1915
14
1916
24
1917
26
1918
29
1919
31
1920
15
1921
14
1922
13
1923
27
1924
14
1925
20
1926
13
1927
18
1928
22
1929
13
1930
15
1931
21
1932
23
1933
16
1934
29
1935
8
1936
42
1937
10
1938
4
1939
31
1940
14
1941
12
1942
21
1943
11
1944
10
1945
23
1946
17
1947
20
1948
14
1949
15
1950
15
1951
21
1952
18
1953
16
1954
21
1955
12
1956
18
1957
9
1958
18
1959
12
1960
6
All-Time Record Progression
7 new records
7 all-time records were set at St Albans between 12 January 1916 and 27 March 1956. Each dot is a new record.
When St Albans set new all-time records
Date
Kind
Detail
1916-01-12
Record low maximum temperature
Record low maximum temperature -36.7 C (-34.1 F)
1924-04-26
Record daily snowfall
Record daily snowfall 35.6 cm (14.0 in)
1931-06-17
Record high maximum temperature
Record high maximum temperature 42.8 C (109.0 F)
1936-07-11
Record high maximum temperature
Record high maximum temperature 44.4 C (111.9 F)
1936-07-11
Record high minimum temperature
Record high minimum temperature 24.4 C (75.9 F)
1955-07-05
Record daily precipitation
Record daily precipitation 89.4 mm (3.5 in)
1956-03-27
Record daily snowfall
Record daily snowfall 38.1 cm (15.0 in)
Wettest Day of Each Month
Jul: 89.4 mm (3.5 in)
The wettest day on record for each calendar month at St Albans. The most was 89.4 mm (3.5 in) on 5 July 1955.
Record daily precipitation for each month at St Albans
Month
Record daily precipitation (mm)
Date
Jan
22.9 mm (0.9 in)
23 January 1950
Feb
31.2 mm (1.2 in)
25 February 1930
Mar
38.1 mm (1.5 in)
27 March 1956
Apr
35.6 mm (1.4 in)
26 April 1924
May
74.2 mm (2.9 in)
20 May 1926
Jun
65.5 mm (2.6 in)
3 June 1887
Jul
89.4 mm (3.5 in)
5 July 1955
Aug
74.2 mm (2.9 in)
11 August 1907
Sep
72.1 mm (2.8 in)
8 September 1915
Oct
47.8 mm (1.9 in)
3 October 1911
Nov
29.2 mm (1.1 in)
24 November 1958
Dec
25.4 mm (1.0 in)
17 December 1899
Period of Record Coverage
1885 to 1960
Complete yearUnder 90 percent of days
76 years of record at St Albans, 1885 to 1960. 3 years have data for under 90 percent of days and are left out of rankings: 1885, 1896, 1960.
Cooler than the station meanWarmer than the station mean
One stripe for each of 69 complete years at St Albans, 1886 to 1959. Blue stripes are years cooler than the station's own mean of 2.3 C (36.2 F); red stripes are warmer. The coolest year was 1893, at 0.1 C (32.1 F), and the warmest was 1953, at 4.0 C (39.2 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at St Albans as warming stripes, 1886 to 1959
Year
Annual mean temperature
Difference from the station mean
1886
1.6 C
-0.72 C
1887
0.3 C
-2.01 C
1888
0.7 C
-1.66 C
1889
3.2 C
+0.84 C
1890
1.6 C
-0.77 C
1891
2.1 C
-0.27 C
1892
1.1 C
-1.25 C
1893
0.1 C
-2.28 C
1894
2.6 C
+0.20 C
1895
1.4 C
-0.94 C
1897
1.6 C
-0.80 C
1898
1.9 C
-0.42 C
1899
1.2 C
-1.17 C
1900
3.2 C
+0.86 C
1903
1.9 C
-0.44 C
1904
1.5 C
-0.83 C
1905
2.8 C
+0.48 C
1906
3.4 C
+1.04 C
1907
1.1 C
-1.28 C
1908
3.4 C
+1.07 C
1909
2.2 C
-0.17 C
1910
3.6 C
+1.21 C
1911
1.9 C
-0.41 C
1912
2.2 C
-0.13 C
1913
2.5 C
+0.10 C
1914
3.2 C
+0.80 C
1915
3.4 C
+1.07 C
1916
1.1 C
-1.29 C
1917
0.9 C
-1.50 C
1918
2.6 C
+0.20 C
1919
1.9 C
-0.44 C
1920
2.6 C
+0.24 C
1921
3.6 C
+1.20 C
1922
3.1 C
+0.75 C
1923
2.7 C
+0.36 C
1924
1.6 C
-0.76 C
1925
2.6 C
+0.29 C
1926
2.9 C
+0.50 C
1927
1.6 C
-0.77 C
1928
3.6 C
+1.20 C
1929
1.5 C
-0.88 C
1930
3.3 C
+0.93 C
1932
2.4 C
+0.09 C
1933
2.7 C
+0.30 C
1934
3.7 C
+1.38 C
1935
1.6 C
-0.72 C
1936
1.6 C
-0.76 C
1937
2.2 C
-0.20 C
1938
3.7 C
+1.39 C
1939
3.4 C
+1.07 C
1941
3.9 C
+1.50 C
1942
3.2 C
+0.84 C
1943
2.5 C
+0.13 C
1944
3.6 C
+1.27 C
1945
1.8 C
-0.52 C
1946
2.7 C
+0.32 C
1947
2.4 C
+0.08 C
1948
2.4 C
+0.07 C
1949
2.6 C
+0.26 C
1950
0.2 C
-2.18 C
1951
1.1 C
-1.22 C
1952
3.7 C
+1.35 C
1953
4.0 C
+1.63 C
1954
3.3 C
+0.90 C
1955
1.9 C
-0.50 C
1956
2.0 C
-0.39 C
1957
2.9 C
+0.50 C
1958
3.4 C
+1.01 C
1959
2.5 C
+0.16 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1886 to 1959. In Fahrenheit: 0.3 F (0.1 to 0.5) per decade. The slope is a straight line fitted to 69 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at St Albans
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.3) per decade
0.3 F (0.1 to 0.5) per decade
1886 to 1959
69
Rise
Mean daily maximum
0.05 C (-0.06 to 0.16) per decade
0.1 F (-0.1 to 0.3) per decade
1886 to 1959
69
Not clearly different from zero
Mean daily minimum
0.3 C (0.2 to 0.4) per decade
0.5 F (0.3 to 0.7) per decade
1886 to 1959
69
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 1960
Yearly extremes at St Albans: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
44.4 C (111.9 F)
1936
38.1 C (100.5 F)
76
Coldest night (TNn)
-44.4 C (-47.9 F)
1887
-39.4 C (-38.9 F)
76
Wettest day (Rx1day)
89.4 mm (3.5 in)
1955
40.6 mm (1.6 in)
76
Wettest five days (Rx5day)
136.4 mm (5.4 in)
1935
61.3 mm (2.4 in)
76
Longest dry spell (CDD)
55 days
1900
26 days
76
Hottest day (TXx)
The hottest day of the year at St Albans, 1885 to 1960. The record is 44.4 C (111.9 F) in 1936, marked on the chart; the median year is 38.1 C (100.5 F).
Hottest day (TXx) at St Albans by year
Year
Hottest day (TXx)
1885
35.0 C (95.0 F)
1886
42.2 C (108.0 F)
1887
36.1 C (97.0 F)
1888
37.2 C (99.0 F)
1889
38.9 C (102.0 F)
1890
38.3 C (100.9 F)
1891
37.2 C (99.0 F)
1892
35.0 C (95.0 F)
1893
41.1 C (106.0 F)
1894
38.9 C (102.0 F)
1895
36.1 C (97.0 F)
1896
36.7 C (98.1 F)
1897
38.9 C (102.0 F)
1898
38.3 C (100.9 F)
1899
35.0 C (95.0 F)
1900
41.7 C (107.1 F)
1901
38.9 C (102.0 F)
1902
34.4 C (93.9 F)
1903
37.2 C (99.0 F)
1904
36.1 C (97.0 F)
1905
34.4 C (93.9 F)
1906
39.4 C (102.9 F)
1907
36.7 C (98.1 F)
1908
38.3 C (100.9 F)
1909
36.7 C (98.1 F)
1910
41.7 C (107.1 F)
1911
38.9 C (102.0 F)
1912
40.0 C (104.0 F)
1913
37.8 C (100.0 F)
1914
41.7 C (107.1 F)
1915
37.2 C (99.0 F)
1916
38.9 C (102.0 F)
1917
38.9 C (102.0 F)
1918
38.9 C (102.0 F)
1919
38.9 C (102.0 F)
1920
36.7 C (98.1 F)
1921
40.6 C (105.1 F)
1922
40.0 C (104.0 F)
1923
37.2 C (99.0 F)
1924
35.0 C (95.0 F)
1925
37.8 C (100.0 F)
1926
41.1 C (106.0 F)
1927
35.6 C (96.1 F)
1928
37.2 C (99.0 F)
1929
39.4 C (102.9 F)
1930
38.3 C (100.9 F)
1931
42.8 C (109.0 F)
1932
38.3 C (100.9 F)
1933
39.4 C (102.9 F)
1934
40.6 C (105.1 F)
1935
36.7 C (98.1 F)
1936
44.4 C (111.9 F)
1937
39.4 C (102.9 F)
1938
37.2 C (99.0 F)
1939
40.0 C (104.0 F)
1940
37.8 C (100.0 F)
1941
41.7 C (107.1 F)
1942
37.8 C (100.0 F)
1943
35.6 C (96.1 F)
1944
35.6 C (96.1 F)
1945
38.9 C (102.0 F)
1946
40.6 C (105.1 F)
1947
39.4 C (102.9 F)
1948
36.7 C (98.1 F)
1949
40.0 C (104.0 F)
1950
33.3 C (91.9 F)
1951
40.6 C (105.1 F)
1952
40.0 C (104.0 F)
1953
36.1 C (97.0 F)
1954
35.0 C (95.0 F)
1955
36.7 C (98.1 F)
1956
36.1 C (97.0 F)
1957
37.2 C (99.0 F)
1958
35.6 C (96.1 F)
1959
36.7 C (98.1 F)
1960
36.7 C (98.1 F)
Coldest night (TNn)
The coldest night of the year at St Albans, 1885 to 1960. The record is -44.4 C (-47.9 F) in 1887, marked on the chart; the median year is -39.4 C (-38.9 F).
Coldest night (TNn) at St Albans by year
Year
Coldest night (TNn)
1885
-31.7 C (-25.1 F)
1886
-43.3 C (-45.9 F)
1887
-44.4 C (-47.9 F)
1888
-43.3 C (-45.9 F)
1889
-42.8 C (-45.0 F)
1890
-40.0 C (-40.0 F)
1891
-40.6 C (-41.1 F)
1892
-42.2 C (-44.0 F)
1893
-44.4 C (-47.9 F)
1894
-40.0 C (-40.0 F)
1895
-41.7 C (-43.1 F)
1896
-40.6 C (-41.1 F)
1897
-41.1 C (-42.0 F)
1898
-34.4 C (-29.9 F)
1899
-42.8 C (-45.0 F)
1900
-36.7 C (-34.1 F)
1901
-37.8 C (-36.0 F)
1902
-36.1 C (-33.0 F)
1903
-39.4 C (-38.9 F)
1904
-40.6 C (-41.1 F)
1905
-41.7 C (-43.1 F)
1906
-36.7 C (-34.1 F)
1907
-40.0 C (-40.0 F)
1908
-38.9 C (-38.0 F)
1909
-40.6 C (-41.1 F)
1910
-37.8 C (-36.0 F)
1911
-41.7 C (-43.1 F)
1912
-41.1 C (-42.0 F)
1913
-37.2 C (-35.0 F)
1914
-43.9 C (-47.0 F)
1915
-39.4 C (-38.9 F)
1916
-42.8 C (-45.0 F)
1917
-44.4 C (-47.9 F)
1918
-40.6 C (-41.1 F)
1919
-37.8 C (-36.0 F)
1920
-40.6 C (-41.1 F)
1921
-35.6 C (-32.1 F)
1922
-41.1 C (-42.0 F)
1923
-37.2 C (-35.0 F)
1924
-36.7 C (-34.1 F)
1925
-36.7 C (-34.1 F)
1926
-34.4 C (-29.9 F)
1927
-40.6 C (-41.1 F)
1928
-35.0 C (-31.0 F)
1929
-40.0 C (-40.0 F)
1930
-41.7 C (-43.1 F)
1931
-29.4 C (-20.9 F)
1932
-38.3 C (-36.9 F)
1933
-38.9 C (-38.0 F)
1934
-40.6 C (-41.1 F)
1935
-38.9 C (-38.0 F)
1936
-44.4 C (-47.9 F)
1937
-40.6 C (-41.1 F)
1938
-37.2 C (-35.0 F)
1939
-40.6 C (-41.1 F)
1940
-37.2 C (-35.0 F)
1941
-38.3 C (-36.9 F)
1942
-35.6 C (-32.1 F)
1943
-42.8 C (-45.0 F)
1944
-36.7 C (-34.1 F)
1945
-38.3 C (-36.9 F)
1946
-37.2 C (-35.0 F)
1947
-35.0 C (-31.0 F)
1948
-40.6 C (-41.1 F)
1949
-42.2 C (-44.0 F)
1950
-40.0 C (-40.0 F)
1951
-37.8 C (-36.0 F)
1952
-34.4 C (-29.9 F)
1953
-35.0 C (-31.0 F)
1954
-39.4 C (-38.9 F)
1955
-36.7 C (-34.1 F)
1956
-38.3 C (-36.9 F)
1957
-35.0 C (-31.0 F)
1958
-37.2 C (-35.0 F)
1959
-35.6 C (-32.1 F)
1960
-33.3 C (-27.9 F)
Wettest day (Rx1day)
The wettest day of the year at St Albans, 1885 to 1960. The record is 89.4 mm (3.5 in) in 1955, marked on the chart; the median year is 40.6 mm (1.6 in).
Wettest day (Rx1day) at St Albans by year
Year
Wettest day (Rx1day)
1885
29.7 mm (1.2 in)
1886
31.5 mm (1.2 in)
1887
65.5 mm (2.6 in)
1888
40.9 mm (1.6 in)
1889
43.9 mm (1.7 in)
1890
41.7 mm (1.6 in)
1891
64.3 mm (2.5 in)
1892
34.0 mm (1.3 in)
1893
25.7 mm (1.0 in)
1894
45.5 mm (1.8 in)
1895
32.5 mm (1.3 in)
1896
34.3 mm (1.4 in)
1897
27.7 mm (1.1 in)
1898
42.4 mm (1.7 in)
1899
62.5 mm (2.5 in)
1900
58.7 mm (2.3 in)
1901
38.9 mm (1.5 in)
1902
25.9 mm (1.0 in)
1903
56.9 mm (2.2 in)
1904
40.1 mm (1.6 in)
1905
27.9 mm (1.1 in)
1906
37.8 mm (1.5 in)
1907
74.2 mm (2.9 in)
1908
26.2 mm (1.0 in)
1909
25.9 mm (1.0 in)
1910
28.4 mm (1.1 in)
1911
50.5 mm (2.0 in)
1912
39.6 mm (1.6 in)
1913
31.5 mm (1.2 in)
1914
32.3 mm (1.3 in)
1915
72.1 mm (2.8 in)
1916
28.2 mm (1.1 in)
1917
21.3 mm (0.8 in)
1918
40.6 mm (1.6 in)
1919
66.8 mm (2.6 in)
1920
30.5 mm (1.2 in)
1921
34.3 mm (1.4 in)
1922
27.9 mm (1.1 in)
1923
57.2 mm (2.3 in)
1924
37.8 mm (1.5 in)
1925
43.4 mm (1.7 in)
1926
74.2 mm (2.9 in)
1927
44.2 mm (1.7 in)
1928
58.4 mm (2.3 in)
1929
25.1 mm (1.0 in)
1930
33.0 mm (1.3 in)
1931
64.3 mm (2.5 in)
1932
44.5 mm (1.8 in)
1933
43.4 mm (1.7 in)
1934
13.0 mm (0.5 in)
1935
62.2 mm (2.4 in)
1936
49.3 mm (1.9 in)
1937
45.0 mm (1.8 in)
1938
28.2 mm (1.1 in)
1939
36.8 mm (1.4 in)
1940
56.6 mm (2.2 in)
1941
58.7 mm (2.3 in)
1942
38.1 mm (1.5 in)
1943
40.6 mm (1.6 in)
1944
47.0 mm (1.9 in)
1945
38.6 mm (1.5 in)
1946
28.4 mm (1.1 in)
1947
45.2 mm (1.8 in)
1948
43.7 mm (1.7 in)
1949
29.2 mm (1.1 in)
1950
66.8 mm (2.6 in)
1951
25.4 mm (1.0 in)
1952
23.9 mm (0.9 in)
1953
58.7 mm (2.3 in)
1954
65.5 mm (2.6 in)
1955
89.4 mm (3.5 in)
1956
42.2 mm (1.7 in)
1957
51.8 mm (2.0 in)
1958
36.6 mm (1.4 in)
1959
35.1 mm (1.4 in)
1960
71.4 mm (2.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at St Albans, 1885 to 1960. The record is 136.4 mm (5.4 in) in 1935, marked on the chart; the median year is 61.3 mm (2.4 in).
Wettest five days (Rx5day) at St Albans by year
Year
Wettest five days (Rx5day)
1885
44.0 mm (1.7 in)
1886
38.1 mm (1.5 in)
1887
80.9 mm (3.2 in)
1888
79.5 mm (3.1 in)
1889
49.9 mm (2.0 in)
1890
56.4 mm (2.2 in)
1891
87.4 mm (3.4 in)
1892
72.7 mm (2.9 in)
1893
31.0 mm (1.2 in)
1894
54.2 mm (2.1 in)
1895
57.9 mm (2.3 in)
1896
42.7 mm (1.7 in)
1897
32.5 mm (1.3 in)
1898
44.7 mm (1.8 in)
1899
77.8 mm (3.1 in)
1900
81.9 mm (3.2 in)
1901
82.3 mm (3.2 in)
1902
54.1 mm (2.1 in)
1903
76.5 mm (3.0 in)
1904
64.5 mm (2.5 in)
1905
54.6 mm (2.1 in)
1906
58.2 mm (2.3 in)
1907
108.0 mm (4.3 in)
1908
38.8 mm (1.5 in)
1909
39.9 mm (1.6 in)
1910
38.4 mm (1.5 in)
1911
67.4 mm (2.7 in)
1912
59.0 mm (2.3 in)
1913
63.5 mm (2.5 in)
1914
54.1 mm (2.1 in)
1915
77.9 mm (3.1 in)
1916
53.3 mm (2.1 in)
1917
28.2 mm (1.1 in)
1918
67.4 mm (2.7 in)
1919
89.7 mm (3.5 in)
1920
38.7 mm (1.5 in)
1921
51.3 mm (2.0 in)
1922
49.5 mm (1.9 in)
1923
78.5 mm (3.1 in)
1924
77.0 mm (3.0 in)
1925
78.4 mm (3.1 in)
1926
101.4 mm (4.0 in)
1927
67.1 mm (2.6 in)
1928
64.8 mm (2.6 in)
1929
42.9 mm (1.7 in)
1930
65.0 mm (2.6 in)
1931
91.5 mm (3.6 in)
1932
48.4 mm (1.9 in)
1933
97.6 mm (3.8 in)
1934
33.9 mm (1.3 in)
1935
136.4 mm (5.4 in)
1936
53.6 mm (2.1 in)
1937
54.9 mm (2.2 in)
1938
45.8 mm (1.8 in)
1939
75.7 mm (3.0 in)
1940
57.9 mm (2.3 in)
1941
125.3 mm (4.9 in)
1942
83.4 mm (3.3 in)
1943
65.2 mm (2.6 in)
1944
82.4 mm (3.2 in)
1945
65.3 mm (2.6 in)
1946
43.4 mm (1.7 in)
1947
57.1 mm (2.2 in)
1948
53.6 mm (2.1 in)
1949
50.1 mm (2.0 in)
1950
90.5 mm (3.6 in)
1951
34.9 mm (1.4 in)
1952
50.3 mm (2.0 in)
1953
96.8 mm (3.8 in)
1954
91.0 mm (3.6 in)
1955
100.8 mm (4.0 in)
1956
57.4 mm (2.3 in)
1957
95.7 mm (3.8 in)
1958
49.8 mm (2.0 in)
1959
76.7 mm (3.0 in)
1960
75.9 mm (3.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at St Albans, 1885 to 1960. The record is 55 days in 1900, marked on the chart; the median year is 26 days.
Longest dry spell (CDD) at St Albans by year
Year
Longest dry spell (CDD)
1885
37 days
1886
33 days
1887
23 days
1888
31 days
1889
27 days
1890
41 days
1891
24 days
1892
38 days
1893
25 days
1894
24 days
1895
27 days
1896
23 days
1897
33 days
1898
31 days
1899
24 days
1900
55 days
1901
19 days
1902
23 days
1903
25 days
1904
25 days
1905
34 days
1906
34 days
1907
31 days
1908
21 days
1909
23 days
1910
24 days
1911
37 days
1912
21 days
1913
18 days
1914
40 days
1915
42 days
1916
16 days
1917
26 days
1918
16 days
1919
26 days
1920
22 days
1921
17 days
1922
27 days
1923
28 days
1924
20 days
1925
27 days
1926
15 days
1927
15 days
1928
27 days
1929
20 days
1930
20 days
1931
33 days
1932
22 days
1933
32 days
1934
44 days
1935
25 days
1936
22 days
1937
18 days
1938
54 days
1939
41 days
1940
30 days
1941
21 days
1942
28 days
1943
41 days
1944
28 days
1945
25 days
1946
22 days
1947
19 days
1948
22 days
1949
35 days
1950
17 days
1951
30 days
1952
24 days
1953
26 days
1954
29 days
1955
24 days
1956
15 days
1957
29 days
1958
26 days
1959
26 days
1960
21 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
69 years with a frost
Across 69 years with a frost, the median last spring frost at St Albans falls on 1 June and the median first autumn frost on 10 September, which leaves a median of 104 days between them.
In 1928 to 1959 the median growing season was 107 days. That is 7 days more than in 1886 to 1918.
Fitted over all years, the growing season changes by +2.0 days per decade at this station.
Frost dates and growing season at St Albans
Measure
Median, all years
Earliest period (1886 to 1918)
Recent period (1928 to 1959)
Recent against earliest
Fitted trend
Last spring frost
1 June
1 June
1 June
no change
+0.1 days per decade
First autumn frost
10 September
4 September
16 September
12 days later
+2.1 days per decade
Growing days
104 days
100 days
107 days
7 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
75 years, 1885 to 1959
A day with at least 40.4 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 91.8 mm (3.6 in) of rain is expected about once in 100 years.
Rainfall return levels at St Albans: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
40.4 mm (1.6 in)
5 years
54.4 mm (2.1 in)
10 years
63.5 mm (2.5 in)
25 years
75.0 mm (3.0 in)
50 years
83.5 mm (3.3 in)
100 years
91.8 mm (3.6 in)
Longer than the 75 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, 75 years of values from 1885 to 1959.
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: 89.4 mm (3.5 in) in 1955; 74.2 mm (2.9 in) in 1907; 74.2 mm (2.9 in) in 1926.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of St Albans, at 1935. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1935 ran 0.2 C (0.3 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at St Albans, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1935
-0.2
-0.3
likely
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for St Albans standing records by year: CSV or JSON. Field meanings are on the data page.
Data for St Albans 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.