Aachen Threshold Days by Year

11 fixed thresholds counted per year at Aachen (GME00102316): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Aachen Thresholds

Aachen: nights with a minimum temperature at or below 0 C (32 F) in 105 years, most in 1947 with 96.
Aachen: days with 10 mm (0.39 in) or more of precipitation in 104 years, most in 1966 with 32.
Aachen: days with a maximum temperature at or below 0 C (32 F) in 102 years, most in 1963 with 51.
Aachen: days with 25 mm (0.98 in) or more of precipitation in 94 years, most in 1984 with 8.
11 fixed thresholds have at least one qualifying day at Aachen.

Days at or above 30 C (86 F)

91 years with a qualifying day

Days per year at Aachen with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 30 in 1947.

Days at or above 30 C (86 F) per year at Aachen
Year	Days	Decade average
1891	1	5.4
1892	10	5.4
1893	7	5.4
1894	5	5.4
1895	2	5.4
1897	2	5.4
1898	7	5.4
1899	9	5.4
1900	5	3.9
1901	4	3.9
1902	3	3.9
1903	2	3.9
1904	6	3.9
1905	2	3.9
1906	5	3.9
1911	24	10.3
1912	5	10.3
1914	2	10.3
1930	7	5.5
1931	4	5.5
1932	9	5.5
1933	5	5.5
1934	7	5.5
1935	7	5.5
1936	2	5.5
1937	5	5.5
1938	7	5.5
1939	2	5.5
1941	9	8.7
1942	5	8.7
1943	4	8.7
1944	7	8.7
1945	6	8.7
1946	6	8.7
1947	30	8.7
1948	8	8.7
1949	3	8.7
1950	5	4
1951	1	4
1952	6	4
1953	3	4
1954	3	4
1956	1	4
1957	7	4
1958	2	4
1959	8	4
1961	6	4.6
1963	1	4.6
1964	10	4.6
1966	2	4.6
1967	3	4.6
1968	3	4.6
1969	7	4.6
1970	2	5.6
1972	3	5.6
1973	9	5.6
1974	3	5.6
1975	8	5.6
1976	18	5.6
1977	1	5.6
1978	1	5.6
1980	2	2.6
1981	1	2.6
1982	2	2.6
1983	8	2.6
1984	3	2.6
1985	1	2.6
1986	1	2.6
1987	2	2.6
1989	3	2.6
1990	6	7.6
1991	4	7.6
1992	6	7.6
1993	2	7.6
1994	16	7.6
1995	15	7.6
1996	4	7.6
1997	6	7.6
1998	8	7.6
1999	9	7.6
2000	3	6.9
2001	7	6.9
2002	7	6.9
2003	16	6.9
2004	4	6.9
2005	8	6.9
2006	14	6.9
2007	4	6.9
2008	2	6.9
2009	4	6.9
2010	11	11

For each year, a bar from the first to the last day at Aachen meeting 30 C (86 F).

First to last qualifying date each year at Aachen
Year	First date	Last date
1891	1891-07-01	1891-07-01
1892	1892-05-25	1892-08-24
1893	1893-06-19	1893-08-18
1894	1894-07-01	1894-07-24
1895	1895-08-22	1895-09-10
1897	1897-06-29	1897-07-25
1898	1898-08-14	1898-09-09
1899	1899-07-12	1899-09-06
1900	1900-07-16	1900-07-28
1901	1901-07-12	1901-08-10
1902	1902-06-03	1902-07-15
1903	1903-06-28	1903-09-02
1904	1904-07-15	1904-08-04
1905	1905-06-30	1905-07-09
1906	1906-08-02	1906-09-04
1911	1911-07-07	1911-09-12
1912	1912-07-12	1912-07-17
1914	1914-08-01	1914-08-10
1930	1930-06-18	1930-08-30
1931	1931-05-28	1931-08-02
1932	1932-07-05	1932-08-26
1933	1933-07-26	1933-08-29
1934	1934-06-17	1934-09-18
1935	1935-06-10	1935-08-23
1936	1936-06-19	1936-06-20
1937	1937-05-26	1937-08-08
1938	1938-06-08	1938-08-06
1939	1939-06-06	1939-06-07
1941	1941-06-22	1941-07-25
1942	1942-07-05	1942-08-29
1943	1943-07-31	1943-08-21
1944	1944-05-28	1944-08-24
1945	1945-05-11	1945-07-15
1946	1946-07-02	1946-08-05
1947	1947-05-31	1947-09-19
1948	1948-06-08	1948-07-30
1949	1949-07-13	1949-09-05
1950	1950-06-06	1950-08-23
1951	1951-07-31	1951-07-31
1952	1952-06-29	1952-08-12
1953	1953-05-25	1953-08-13
1954	1954-08-03	1954-09-01
1956	1956-07-09	1956-07-09
1957	1957-06-29	1957-07-06
1958	1958-08-28	1958-09-06
1959	1959-07-05	1959-09-12
1961	1961-06-30	1961-09-19
1963	1963-08-02	1963-08-02
1964	1964-06-13	1964-08-28
1966	1966-08-12	1966-08-13
1967	1967-07-13	1967-08-01
1968	1968-04-21	1968-07-02
1969	1969-05-13	1969-08-05
1970	1970-06-27	1970-07-07
1972	1972-07-18	1972-07-20
1973	1973-06-27	1973-09-05
1974	1974-08-14	1974-08-16
1975	1975-07-14	1975-08-09
1976	1976-06-09	1976-07-16
1977	1977-06-13	1977-06-13
1978	1978-07-30	1978-07-30
1980	1980-07-26	1980-08-02
1981	1981-08-06	1981-08-06
1982	1982-07-09	1982-07-14
1983	1983-07-10	1983-08-19
1984	1984-07-09	1984-07-30
1985	1985-07-14	1985-07-14
1986	1986-08-03	1986-08-03
1987	1987-06-30	1987-08-21
1989	1989-07-06	1989-08-20
1990	1990-06-26	1990-08-12
1991	1991-07-07	1991-08-22
1992	1992-05-14	1992-08-09
1993	1993-06-09	1993-07-01
1994	1994-07-02	1994-08-04
1995	1995-06-30	1995-08-22
1996	1996-06-06	1996-08-20
1997	1997-08-10	1997-08-25
1998	1998-05-11	1998-08-11
1999	1999-05-29	1999-09-13
2000	2000-06-09	2000-06-20
2001	2001-06-26	2001-08-26
2002	2002-06-17	2002-08-19
2003	2003-07-15	2003-09-20
2004	2004-06-08	2004-08-09
2005	2005-05-26	2005-08-31
2006	2006-06-12	2006-09-12
2007	2007-07-15	2007-08-06
2008	2008-07-02	2008-07-31
2009	2009-07-02	2009-08-20
2010	2010-07-01	2010-07-21

Every Fixed Threshold

Fixed thresholds at Aachen
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	91	30	1947	11
35 C (95 F): Days	16	4	1911	1
90 F (32.2 C): Days	58	14	1911	6
0 C (32 F): Ice days (max	102	51	1963	35
0 C (32 F): Frost days (min	105	96	1947	81
-10 C (14 F): Days with min	57	23	1895	5
-20 C (-4 F): Days with min	2	2	1945	2
20 C (68 F): Tropical nights (min	51	7	1994	2
10 mm (0.39 in): Days with 10 mm or more rain	104	32	1966	20
25 mm (0.98 in): Days with 25 mm or more rain	94	8	1984	2
50 mm (1.97 in): Days with 50 mm or more rain	13	1	1901	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1891.

Download the Data

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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Aachen Threshold Days by Year

Key Facts for Aachen Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related