Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Aachen. 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 Aachen, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
16.2 C (61.2 F)
-20.4 C (-4.7 F)
n/a
n/a
Feb
20.5 C (68.9 F)
-20.2 C (-4.4 F)
n/a
n/a
Mar
24.4 C (75.9 F)
-11.9 C (10.6 F)
n/a
n/a
Apr
30.0 C (86.0 F)
-4.8 C (23.4 F)
n/a
n/a
May
34.2 C (93.6 F)
-1.3 C (29.7 F)
n/a
n/a
Jun
36.6 C (97.9 F)
1.8 C (35.2 F)
n/a
n/a
Jul
37.0 C (98.6 F)
5.8 C (42.4 F)
n/a
n/a
Aug
37.2 C (99.0 F)
3.4 C (38.1 F)
n/a
n/a
Sep
34.3 C (93.7 F)
0.0 C (32.0 F)
n/a
n/a
Oct
26.9 C (80.4 F)
-5.7 C (21.7 F)
n/a
n/a
Nov
22.1 C (71.8 F)
-8.9 C (16.0 F)
n/a
n/a
Dec
17.6 C (63.7 F)
-16.5 C (2.3 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Aachen still stand. 1956 holds the most, with 29.
Standing records at Aachen by the year they were set
Year set
Standing records
1891
3
1892
16
1893
8
1894
12
1895
25
1896
6
1897
12
1898
4
1899
21
1900
15
1901
21
1902
28
1903
21
1904
18
1905
13
1906
12
1907
16
1908
22
1909
14
1910
4
1911
28
1912
24
1913
12
1914
9
1930
14
1931
22
1932
14
1933
18
1934
11
1935
12
1936
13
1937
5
1938
25
1939
18
1940
18
1941
19
1942
17
1943
9
1944
12
1945
20
1946
12
1947
27
1948
10
1949
18
1950
8
1951
5
1952
11
1953
14
1954
5
1955
14
1956
29
1957
21
1958
13
1959
9
1960
14
1961
13
1962
15
1963
16
1964
14
1965
6
1966
11
1967
11
1968
19
1969
10
1970
4
1971
14
1972
9
1973
6
1974
13
1975
10
1976
17
1977
14
1978
13
1979
13
1980
13
1981
5
1982
2
1983
14
1984
7
1985
26
1986
17
1987
16
1988
7
1989
17
1990
22
1991
11
1992
9
1993
10
1994
18
1995
12
1996
12
1997
13
1998
22
1999
12
2000
13
2001
8
2002
11
2003
13
2004
12
2005
18
2006
26
2007
18
2008
4
2009
7
2010
15
2011
5
All-Time Record Progression
7 new records
7 all-time records were set at Aachen between 19 December 1938 and 18 February 1969. Each dot is a new record.
When Aachen set new all-time records
Date
Kind
Detail
1938-12-19
Record low maximum temperature
Record low maximum temperature -11.2 C (11.8 F)
1940-01-22
Record low maximum temperature
Record low maximum temperature -12.8 C (9.0 F)
1944-08-23
Record high maximum temperature
Record high maximum temperature 37.2 C (99.0 F)
1945-01-11
Record low minimum temperature
Record low minimum temperature -20.4 C (-4.7 F)
1947-07-29
Record high minimum temperature
Record high minimum temperature 24.5 C (76.1 F)
1969-02-17
Record snow depth
Record snow depth 39.0 cm (15.4 in)
1969-02-18
Record snow depth
Record snow depth 43.0 cm (16.9 in)
Wettest Day of Each Month
Jun: 68.0 mm (2.7 in)
The wettest day on record for each calendar month at Aachen. The most was 68.0 mm (2.7 in) on 7 June 1905.
Record daily precipitation for each month at Aachen
Month
Record daily precipitation (mm)
Date
Jan
36.5 mm (1.4 in)
11 January 1993
Feb
43.5 mm (1.7 in)
6 February 1984
Mar
32.1 mm (1.3 in)
16 March 1948
Apr
46.5 mm (1.8 in)
6 April 1947
May
42.7 mm (1.7 in)
9 May 1906
Jun
68.0 mm (2.7 in)
7 June 1905
Jul
55.6 mm (2.2 in)
12 July 1930
Aug
63.0 mm (2.5 in)
26 August 1971
Sep
66.6 mm (2.6 in)
26 September 1956
Oct
63.7 mm (2.5 in)
7 October 1982
Nov
42.6 mm (1.7 in)
7 November 1948
Dec
40.7 mm (1.6 in)
29 December 1990
Period of Record Coverage
1891 to 2011
Complete yearUnder 90 percent of days
106 years of record at Aachen, 1891 to 2011. 1 years have data for under 90 percent of days and are left out of rankings: 2011.
Cooler than the station meanWarmer than the station mean
One stripe for each of 105 complete years at Aachen, 1891 to 2010. Blue stripes are years cooler than the station's own mean of 10.0 C (50.0 F); red stripes are warmer. The coolest year was 1956, at 8.5 C (47.2 F), and the warmest was 2000, at 11.5 C (52.8 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Aachen as warming stripes, 1891 to 2010
Year
Annual mean temperature
Difference from the station mean
1891
9.4 C
-0.65 C
1892
9.6 C
-0.38 C
1893
10.3 C
+0.25 C
1894
10.2 C
+0.15 C
1895
9.0 C
-1.03 C
1896
9.2 C
-0.81 C
1897
10.0 C
+0.01 C
1898
10.3 C
+0.33 C
1899
10.1 C
+0.12 C
1900
9.9 C
-0.08 C
1901
9.0 C
-0.98 C
1902
8.8 C
-1.24 C
1903
9.7 C
-0.30 C
1904
9.7 C
-0.35 C
1905
8.7 C
-1.27 C
1906
9.5 C
-0.53 C
1907
9.4 C
-0.64 C
1908
9.1 C
-0.89 C
1909
8.8 C
-1.17 C
1910
10.0 C
-0.06 C
1911
10.7 C
+0.72 C
1912
9.9 C
-0.07 C
1913
10.2 C
+0.23 C
1914
9.9 C
-0.10 C
1930
10.4 C
+0.34 C
1931
9.2 C
-0.77 C
1932
9.9 C
-0.10 C
1933
9.5 C
-0.53 C
1934
10.9 C
+0.84 C
1935
10.0 C
+0.02 C
1936
9.7 C
-0.27 C
1937
10.2 C
+0.20 C
1938
10.2 C
+0.14 C
1939
10.0 C
-0.04 C
1940
8.7 C
-1.32 C
1941
9.1 C
-0.89 C
1942
9.1 C
-0.92 C
1943
10.5 C
+0.47 C
1944
9.5 C
-0.55 C
1945
10.4 C
+0.40 C
1946
9.7 C
-0.35 C
1947
10.3 C
+0.24 C
1948
10.4 C
+0.40 C
1949
10.4 C
+0.36 C
1950
10.0 C
-0.05 C
1951
10.2 C
+0.18 C
1952
9.4 C
-0.58 C
1953
10.3 C
+0.31 C
1954
9.4 C
-0.59 C
1955
9.3 C
-0.67 C
1956
8.5 C
-1.56 C
1957
10.2 C
+0.21 C
1958
9.9 C
-0.14 C
1959
10.9 C
+0.88 C
1960
10.1 C
+0.08 C
1961
10.7 C
+0.70 C
1962
8.6 C
-1.45 C
1963
8.6 C
-1.46 C
1964
9.8 C
-0.18 C
1965
9.1 C
-0.87 C
1966
10.1 C
+0.04 C
1967
10.3 C
+0.27 C
1968
9.6 C
-0.43 C
1969
9.8 C
-0.19 C
1970
9.7 C
-0.33 C
1971
10.3 C
+0.24 C
1972
9.7 C
-0.34 C
1973
9.9 C
-0.09 C
1974
10.2 C
+0.22 C
1975
10.3 C
+0.24 C
1976
10.5 C
+0.48 C
1977
10.2 C
+0.15 C
1978
9.4 C
-0.60 C
1979
9.3 C
-0.72 C
1980
9.4 C
-0.57 C
1981
9.8 C
-0.23 C
1982
10.8 C
+0.83 C
1983
10.6 C
+0.55 C
1984
9.9 C
-0.16 C
1985
9.0 C
-0.98 C
1986
9.5 C
-0.52 C
1987
9.2 C
-0.83 C
1988
10.6 C
+0.60 C
1989
11.3 C
+1.29 C
1990
11.2 C
+1.19 C
1991
10.2 C
+0.15 C
1992
10.8 C
+0.77 C
1993
10.2 C
+0.17 C
1994
11.4 C
+1.39 C
1995
11.0 C
+0.96 C
1996
9.1 C
-0.91 C
1997
10.8 C
+0.83 C
1998
10.8 C
+0.77 C
1999
11.3 C
+1.31 C
2000
11.5 C
+1.53 C
2001
10.8 C
+0.74 C
2002
11.3 C
+1.31 C
2003
11.2 C
+1.23 C
2004
10.6 C
+0.57 C
2005
11.0 C
+0.95 C
2006
11.5 C
+1.44 C
2007
11.4 C
+1.43 C
2008
10.7 C
+0.72 C
2009
10.8 C
+0.79 C
2010
9.5 C
-0.47 C
The annual mean temperature here has risen by 0.1 C (0.1 to 0.1) per decade over 1891 to 2010. In Fahrenheit: 0.2 F (0.1 to 0.2) per decade. The slope is a straight line fitted to 105 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Aachen
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (0.1 to 0.1) per decade
0.2 F (0.1 to 0.2) per decade
1891 to 2010
105
Rise
Mean daily maximum
0.08 C (0.03 to 0.12) per decade
0.1 F (0.1 to 0.2) per decade
1891 to 2010
105
Rise
Mean daily minimum
0.1 C (0.1 to 0.1) per decade
0.2 F (0.1 to 0.3) per decade
1891 to 2010
105
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
1891 to 2011
Yearly extremes at Aachen: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
37.2 C (99.0 F)
1944
32.3 C (90.1 F)
106
Coldest night (TNn)
-20.4 C (-4.7 F)
1945
-10.1 C (13.8 F)
106
Wettest day (Rx1day)
68.0 mm (2.7 in)
1905
34.7 mm (1.4 in)
106
Wettest five days (Rx5day)
112.8 mm (4.4 in)
1984
61.5 mm (2.4 in)
106
Longest dry spell (CDD)
37 days
1959
18 days
106
Hottest day (TXx)
The hottest day of the year at Aachen, 1891 to 2011. The record is 37.2 C (99.0 F) in 1944, marked on the chart; the median year is 32.3 C (90.1 F).
Hottest day (TXx) at Aachen by year
Year
Hottest day (TXx)
1891
30.2 C (86.4 F)
1892
36.4 C (97.5 F)
1893
35.0 C (95.0 F)
1894
35.2 C (95.4 F)
1895
31.0 C (87.8 F)
1896
29.1 C (84.4 F)
1897
31.5 C (88.7 F)
1898
33.5 C (92.3 F)
1899
32.5 C (90.5 F)
1900
32.7 C (90.9 F)
1901
32.0 C (89.6 F)
1902
30.8 C (87.4 F)
1903
30.5 C (86.9 F)
1904
33.8 C (92.8 F)
1905
30.5 C (86.9 F)
1906
31.9 C (89.4 F)
1907
29.1 C (84.4 F)
1908
29.4 C (84.9 F)
1909
29.3 C (84.7 F)
1910
28.7 C (83.7 F)
1911
37.0 C (98.6 F)
1912
33.4 C (92.1 F)
1913
29.2 C (84.6 F)
1914
30.7 C (87.3 F)
1930
34.9 C (94.8 F)
1931
30.7 C (87.3 F)
1932
36.1 C (97.0 F)
1933
35.2 C (95.4 F)
1934
33.8 C (92.8 F)
1935
32.7 C (90.9 F)
1936
31.6 C (88.9 F)
1937
34.0 C (93.2 F)
1938
33.1 C (91.6 F)
1939
31.5 C (88.7 F)
1940
29.2 C (84.6 F)
1941
32.5 C (90.5 F)
1942
33.0 C (91.4 F)
1943
32.3 C (90.1 F)
1944
37.2 C (99.0 F)
1945
33.0 C (91.4 F)
1946
33.1 C (91.6 F)
1947
36.6 C (97.9 F)
1948
31.6 C (88.9 F)
1949
32.6 C (90.7 F)
1950
30.6 C (87.1 F)
1951
30.4 C (86.7 F)
1952
34.3 C (93.7 F)
1953
30.9 C (87.6 F)
1954
31.1 C (88.0 F)
1955
29.5 C (85.1 F)
1956
30.8 C (87.4 F)
1957
34.6 C (94.3 F)
1958
31.0 C (87.8 F)
1959
34.5 C (94.1 F)
1960
29.2 C (84.6 F)
1961
32.3 C (90.1 F)
1962
29.6 C (85.3 F)
1963
30.8 C (87.4 F)
1964
35.4 C (95.7 F)
1965
28.7 C (83.7 F)
1966
32.4 C (90.3 F)
1967
31.8 C (89.2 F)
1968
33.3 C (91.9 F)
1969
32.2 C (90.0 F)
1970
30.1 C (86.2 F)
1971
29.8 C (85.6 F)
1972
32.3 C (90.1 F)
1973
32.0 C (89.6 F)
1974
32.4 C (90.3 F)
1975
32.2 C (90.0 F)
1976
35.4 C (95.7 F)
1977
30.1 C (86.2 F)
1978
31.6 C (88.9 F)
1979
29.0 C (84.2 F)
1980
30.6 C (87.1 F)
1981
30.0 C (86.0 F)
1982
32.7 C (90.9 F)
1983
33.1 C (91.6 F)
1984
32.7 C (90.9 F)
1985
31.2 C (88.2 F)
1986
34.8 C (94.6 F)
1987
30.9 C (87.6 F)
1988
29.2 C (84.6 F)
1989
32.8 C (91.0 F)
1990
35.2 C (95.4 F)
1991
33.3 C (91.9 F)
1992
31.8 C (89.2 F)
1993
30.2 C (86.4 F)
1994
36.3 C (97.3 F)
1995
35.0 C (95.0 F)
1996
32.9 C (91.2 F)
1997
32.6 C (90.7 F)
1998
33.9 C (93.0 F)
1999
31.4 C (88.5 F)
2000
33.8 C (92.8 F)
2001
34.6 C (94.3 F)
2002
34.5 C (94.1 F)
2003
36.8 C (98.2 F)
2004
32.3 C (90.1 F)
2005
32.8 C (91.0 F)
2006
36.7 C (98.1 F)
2007
33.8 C (92.8 F)
2008
31.3 C (88.3 F)
2009
34.4 C (93.9 F)
2010
36.4 C (97.5 F)
2011
18.3 C (64.9 F)
Coldest night (TNn)
The coldest night of the year at Aachen, 1891 to 2011. The record is -20.4 C (-4.7 F) in 1945, marked on the chart; the median year is -10.1 C (13.8 F).
Coldest night (TNn) at Aachen by year
Year
Coldest night (TNn)
1891
-13.8 C (7.2 F)
1892
-10.3 C (13.5 F)
1893
-17.0 C (1.4 F)
1894
-14.8 C (5.4 F)
1895
-20.2 C (-4.4 F)
1896
-8.8 C (16.2 F)
1897
-7.3 C (18.9 F)
1898
-4.3 C (24.3 F)
1899
-12.0 C (10.4 F)
1900
-10.8 C (12.6 F)
1901
-17.5 C (0.5 F)
1902
-12.9 C (8.8 F)
1903
-9.1 C (15.6 F)
1904
-9.4 C (15.1 F)
1905
-12.3 C (9.9 F)
1906
-9.2 C (15.4 F)
1907
-14.6 C (5.7 F)
1908
-14.5 C (5.9 F)
1909
-9.0 C (15.8 F)
1910
-6.3 C (20.7 F)
1911
-9.1 C (15.6 F)
1912
-15.9 C (3.4 F)
1913
-7.8 C (18.0 F)
1914
-11.5 C (11.3 F)
1930
-6.3 C (20.7 F)
1931
-10.2 C (13.6 F)
1932
-11.2 C (11.8 F)
1933
-14.0 C (6.8 F)
1934
-9.8 C (14.4 F)
1935
-10.0 C (14.0 F)
1936
-10.0 C (14.0 F)
1937
-6.8 C (19.8 F)
1938
-15.5 C (4.1 F)
1939
-8.1 C (17.4 F)
1940
-16.8 C (1.8 F)
1941
-11.3 C (11.7 F)
1942
-19.2 C (-2.6 F)
1943
-9.3 C (15.3 F)
1944
-9.5 C (14.9 F)
1945
-20.4 C (-4.7 F)
1946
-14.0 C (6.8 F)
1947
-16.0 C (3.2 F)
1948
-11.2 C (11.8 F)
1949
-9.3 C (15.3 F)
1950
-16.5 C (2.3 F)
1951
-6.1 C (21.0 F)
1952
-7.4 C (18.7 F)
1953
-13.0 C (8.6 F)
1954
-16.8 C (1.8 F)
1955
-9.5 C (14.9 F)
1956
-17.1 C (1.2 F)
1957
-6.3 C (20.7 F)
1958
-7.8 C (18.0 F)
1959
-6.8 C (19.8 F)
1960
-14.0 C (6.8 F)
1961
-10.6 C (12.9 F)
1962
-11.7 C (10.9 F)
1963
-17.1 C (1.2 F)
1964
-11.4 C (11.5 F)
1965
-8.1 C (17.4 F)
1966
-13.9 C (7.0 F)
1967
-8.3 C (17.1 F)
1968
-12.0 C (10.4 F)
1969
-11.3 C (11.7 F)
1970
-11.0 C (12.2 F)
1971
-11.4 C (11.5 F)
1972
-10.7 C (12.7 F)
1973
-10.0 C (14.0 F)
1974
-4.0 C (24.8 F)
1975
-7.6 C (18.3 F)
1976
-10.4 C (13.3 F)
1977
-5.5 C (22.1 F)
1978
-15.6 C (3.9 F)
1979
-17.4 C (0.7 F)
1980
-9.1 C (15.6 F)
1981
-10.2 C (13.6 F)
1982
-12.5 C (9.5 F)
1983
-8.0 C (17.6 F)
1984
-6.9 C (19.6 F)
1985
-15.6 C (3.9 F)
1986
-15.8 C (3.6 F)
1987
-15.4 C (4.3 F)
1988
-7.2 C (19.0 F)
1989
-5.4 C (22.3 F)
1990
-3.2 C (26.2 F)
1991
-13.5 C (7.7 F)
1992
-6.8 C (19.8 F)
1993
-10.0 C (14.0 F)
1994
-9.2 C (15.4 F)
1995
-9.3 C (15.3 F)
1996
-14.3 C (6.3 F)
1997
-16.4 C (2.5 F)
1998
-9.2 C (15.4 F)
1999
-9.1 C (15.6 F)
2000
-6.5 C (20.3 F)
2001
-7.8 C (18.0 F)
2002
-8.1 C (17.4 F)
2003
-11.7 C (10.9 F)
2004
-7.6 C (18.3 F)
2005
-9.6 C (14.7 F)
2006
-7.6 C (18.3 F)
2007
-6.7 C (19.9 F)
2008
-5.8 C (21.6 F)
2009
-14.0 C (6.8 F)
2010
-9.3 C (15.3 F)
2011
-6.0 C (21.2 F)
Wettest day (Rx1day)
The wettest day of the year at Aachen, 1891 to 2011. The record is 68.0 mm (2.7 in) in 1905, marked on the chart; the median year is 34.7 mm (1.4 in).
Wettest day (Rx1day) at Aachen by year
Year
Wettest day (Rx1day)
1891
30.3 mm (1.2 in)
1892
39.8 mm (1.6 in)
1893
36.1 mm (1.4 in)
1894
37.1 mm (1.5 in)
1895
28.2 mm (1.1 in)
1896
42.9 mm (1.7 in)
1897
32.3 mm (1.3 in)
1898
37.3 mm (1.5 in)
1899
27.9 mm (1.1 in)
1900
31.4 mm (1.2 in)
1901
57.6 mm (2.3 in)
1902
29.4 mm (1.2 in)
1903
28.1 mm (1.1 in)
1904
30.9 mm (1.2 in)
1905
68.0 mm (2.7 in)
1906
42.7 mm (1.7 in)
1907
34.3 mm (1.4 in)
1908
21.9 mm (0.9 in)
1909
36.4 mm (1.4 in)
1910
38.6 mm (1.5 in)
1911
23.2 mm (0.9 in)
1912
35.5 mm (1.4 in)
1913
35.2 mm (1.4 in)
1914
35.0 mm (1.4 in)
1930
55.6 mm (2.2 in)
1931
28.1 mm (1.1 in)
1932
25.8 mm (1.0 in)
1933
42.1 mm (1.7 in)
1934
23.0 mm (0.9 in)
1935
51.1 mm (2.0 in)
1936
45.8 mm (1.8 in)
1937
30.0 mm (1.2 in)
1938
28.2 mm (1.1 in)
1939
26.1 mm (1.0 in)
1940
32.5 mm (1.3 in)
1941
23.8 mm (0.9 in)
1942
48.8 mm (1.9 in)
1943
31.1 mm (1.2 in)
1944
36.9 mm (1.5 in)
1945
24.3 mm (1.0 in)
1946
28.2 mm (1.1 in)
1947
46.5 mm (1.8 in)
1948
42.6 mm (1.7 in)
1949
39.8 mm (1.6 in)
1950
24.9 mm (1.0 in)
1951
29.3 mm (1.2 in)
1952
35.3 mm (1.4 in)
1953
23.7 mm (0.9 in)
1954
60.6 mm (2.4 in)
1955
52.7 mm (2.1 in)
1956
66.6 mm (2.6 in)
1957
30.0 mm (1.2 in)
1958
28.3 mm (1.1 in)
1959
31.2 mm (1.2 in)
1960
36.0 mm (1.4 in)
1961
48.4 mm (1.9 in)
1962
37.2 mm (1.5 in)
1963
32.6 mm (1.3 in)
1964
53.3 mm (2.1 in)
1965
37.3 mm (1.5 in)
1966
56.6 mm (2.2 in)
1967
37.8 mm (1.5 in)
1968
62.7 mm (2.5 in)
1969
38.7 mm (1.5 in)
1970
32.4 mm (1.3 in)
1971
63.0 mm (2.5 in)
1972
39.8 mm (1.6 in)
1973
22.1 mm (0.9 in)
1974
37.9 mm (1.5 in)
1975
41.3 mm (1.6 in)
1976
35.9 mm (1.4 in)
1977
25.5 mm (1.0 in)
1978
26.1 mm (1.0 in)
1979
29.3 mm (1.2 in)
1980
32.2 mm (1.3 in)
1981
31.2 mm (1.2 in)
1982
63.7 mm (2.5 in)
1983
31.5 mm (1.2 in)
1984
43.5 mm (1.7 in)
1985
35.7 mm (1.4 in)
1986
41.6 mm (1.6 in)
1987
27.8 mm (1.1 in)
1988
23.7 mm (0.9 in)
1989
26.2 mm (1.0 in)
1990
40.7 mm (1.6 in)
1991
36.5 mm (1.4 in)
1992
35.5 mm (1.4 in)
1993
36.5 mm (1.4 in)
1994
23.5 mm (0.9 in)
1995
25.4 mm (1.0 in)
1996
42.2 mm (1.7 in)
1997
27.0 mm (1.1 in)
1998
28.1 mm (1.1 in)
1999
34.2 mm (1.3 in)
2000
26.9 mm (1.1 in)
2001
28.5 mm (1.1 in)
2002
33.3 mm (1.3 in)
2003
26.2 mm (1.0 in)
2004
39.0 mm (1.5 in)
2005
22.2 mm (0.9 in)
2006
27.1 mm (1.1 in)
2007
55.8 mm (2.2 in)
2008
41.7 mm (1.6 in)
2009
32.7 mm (1.3 in)
2010
42.5 mm (1.7 in)
2011
16.3 mm (0.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Aachen, 1891 to 2011. The record is 112.8 mm (4.4 in) in 1984, marked on the chart; the median year is 61.5 mm (2.4 in).
Wettest five days (Rx5day) at Aachen by year
Year
Wettest five days (Rx5day)
1891
58.9 mm (2.3 in)
1892
50.8 mm (2.0 in)
1893
60.1 mm (2.4 in)
1894
55.2 mm (2.2 in)
1895
58.7 mm (2.3 in)
1896
71.1 mm (2.8 in)
1897
55.4 mm (2.2 in)
1898
57.4 mm (2.3 in)
1899
84.4 mm (3.3 in)
1900
68.9 mm (2.7 in)
1901
95.4 mm (3.8 in)
1902
53.4 mm (2.1 in)
1903
55.1 mm (2.2 in)
1904
53.1 mm (2.1 in)
1905
73.6 mm (2.9 in)
1906
74.6 mm (2.9 in)
1907
57.1 mm (2.2 in)
1908
49.9 mm (2.0 in)
1909
73.0 mm (2.9 in)
1910
98.9 mm (3.9 in)
1911
43.7 mm (1.7 in)
1912
67.9 mm (2.7 in)
1913
50.1 mm (2.0 in)
1914
71.5 mm (2.8 in)
1930
110.3 mm (4.3 in)
1931
42.6 mm (1.7 in)
1932
49.9 mm (2.0 in)
1933
48.9 mm (1.9 in)
1934
46.3 mm (1.8 in)
1935
79.3 mm (3.1 in)
1936
73.0 mm (2.9 in)
1937
60.6 mm (2.4 in)
1938
54.1 mm (2.1 in)
1939
74.6 mm (2.9 in)
1940
62.1 mm (2.4 in)
1941
53.3 mm (2.1 in)
1942
82.0 mm (3.2 in)
1943
42.4 mm (1.7 in)
1944
53.3 mm (2.1 in)
1945
46.7 mm (1.8 in)
1946
69.4 mm (2.7 in)
1947
67.1 mm (2.6 in)
1948
65.7 mm (2.6 in)
1949
51.4 mm (2.0 in)
1950
51.7 mm (2.0 in)
1951
62.9 mm (2.5 in)
1952
79.8 mm (3.1 in)
1953
51.9 mm (2.0 in)
1954
73.4 mm (2.9 in)
1955
70.8 mm (2.8 in)
1956
88.4 mm (3.5 in)
1957
53.8 mm (2.1 in)
1958
49.4 mm (1.9 in)
1959
58.1 mm (2.3 in)
1960
66.2 mm (2.6 in)
1961
99.9 mm (3.9 in)
1962
66.2 mm (2.6 in)
1963
54.2 mm (2.1 in)
1964
73.3 mm (2.9 in)
1965
74.3 mm (2.9 in)
1966
80.5 mm (3.2 in)
1967
48.4 mm (1.9 in)
1968
70.3 mm (2.8 in)
1969
80.8 mm (3.2 in)
1970
71.8 mm (2.8 in)
1971
68.1 mm (2.7 in)
1972
66.4 mm (2.6 in)
1973
51.8 mm (2.0 in)
1974
60.8 mm (2.4 in)
1975
58.0 mm (2.3 in)
1976
47.0 mm (1.9 in)
1977
43.6 mm (1.7 in)
1978
48.2 mm (1.9 in)
1979
75.1 mm (3.0 in)
1980
62.6 mm (2.5 in)
1981
64.5 mm (2.5 in)
1982
92.2 mm (3.6 in)
1983
72.0 mm (2.8 in)
1984
112.8 mm (4.4 in)
1985
45.9 mm (1.8 in)
1986
89.2 mm (3.5 in)
1987
63.0 mm (2.5 in)
1988
62.3 mm (2.5 in)
1989
56.8 mm (2.2 in)
1990
55.9 mm (2.2 in)
1991
82.3 mm (3.2 in)
1992
46.9 mm (1.8 in)
1993
69.3 mm (2.7 in)
1994
50.7 mm (2.0 in)
1995
59.6 mm (2.3 in)
1996
95.5 mm (3.8 in)
1997
48.1 mm (1.9 in)
1998
82.3 mm (3.2 in)
1999
52.2 mm (2.1 in)
2000
67.1 mm (2.6 in)
2001
47.5 mm (1.9 in)
2002
63.4 mm (2.5 in)
2003
71.9 mm (2.8 in)
2004
60.2 mm (2.4 in)
2005
59.6 mm (2.3 in)
2006
51.3 mm (2.0 in)
2007
70.3 mm (2.8 in)
2008
49.2 mm (1.9 in)
2009
57.1 mm (2.2 in)
2010
70.3 mm (2.8 in)
2011
32.8 mm (1.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Aachen, 1891 to 2011. The record is 37 days in 1959, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Aachen by year
Year
Longest dry spell (CDD)
1891
18 days
1892
16 days
1893
29 days
1894
23 days
1895
18 days
1896
15 days
1897
32 days
1898
13 days
1899
19 days
1900
15 days
1901
22 days
1902
15 days
1903
23 days
1904
18 days
1905
12 days
1906
17 days
1907
15 days
1908
25 days
1909
12 days
1910
20 days
1911
25 days
1912
18 days
1913
19 days
1914
15 days
1930
21 days
1931
13 days
1932
21 days
1933
22 days
1934
19 days
1935
14 days
1936
20 days
1937
17 days
1938
17 days
1939
25 days
1940
17 days
1941
15 days
1942
21 days
1943
17 days
1944
25 days
1945
13 days
1946
15 days
1947
31 days
1948
21 days
1949
20 days
1950
12 days
1951
22 days
1952
14 days
1953
30 days
1954
17 days
1955
20 days
1956
14 days
1957
16 days
1958
23 days
1959
37 days
1960
16 days
1961
16 days
1962
28 days
1963
21 days
1964
19 days
1965
15 days
1966
18 days
1967
14 days
1968
24 days
1969
35 days
1970
13 days
1971
23 days
1972
22 days
1973
20 days
1974
33 days
1975
26 days
1976
22 days
1977
15 days
1978
15 days
1979
14 days
1980
16 days
1981
18 days
1982
15 days
1983
17 days
1984
24 days
1985
22 days
1986
22 days
1987
17 days
1988
17 days
1989
21 days
1990
21 days
1991
34 days
1992
14 days
1993
19 days
1994
18 days
1995
21 days
1996
15 days
1997
23 days
1998
19 days
1999
18 days
2000
15 days
2001
14 days
2002
22 days
2003
20 days
2004
14 days
2005
17 days
2006
16 days
2007
36 days
2008
17 days
2009
11 days
2010
20 days
2011
12 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
105 years with a frost
Across 105 years with a frost, the median last spring frost at Aachen falls on 14 April and the median first autumn frost on 5 November, which leaves a median of 207 days between them.
In 1981 to 2010 the median growing season was 219 days. That is 20 days more than in 1891 to 1935.
Fitted over all years, the growing season changes by +2.3 days per decade at this station.
Frost dates and growing season at Aachen
Measure
Median, all years
Earliest period (1891 to 1935)
Recent period (1981 to 2010)
Recent against earliest
Fitted trend
Last spring frost
14 April
20 April
7 April
13 days earlier
-1.3 days per decade
First autumn frost
5 November
5 November
9 November
4 days later
+1.0 days per decade
Growing days
207 days
199 days
219 days
20 days more
+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
104 years, 1891 to 2010
A day with at least 34.1 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 75.2 mm (3.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Aachen: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
34.1 mm (1.3 in)
5 years
43.5 mm (1.7 in)
10 years
50.4 mm (2.0 in)
25 years
59.7 mm (2.4 in)
50 years
67.2 mm (2.6 in)
100 years
75.2 mm (3.0 in)
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 104 years of values from 1891 to 2010.
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: 68.0 mm (2.7 in) in 1905; 66.6 mm (2.6 in) in 1956; 63.7 mm (2.5 in) in 1982.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Aachen standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Aachen 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.