Koln-Stammheim Weather Records (GME00125302)

Record envelope, standing records and threshold days for Koln-Stammheim (GME00125302), Germany, with 80 years of record.

Key Facts for Koln-Stammheim

Koln-Stammheim (GME00125302) is a weather station in Germany at 50.99 latitude and 6.98 longitude, 43 m (141 ft) above sea level.
The station reports from 1945 to 2024, 80 years of record.
1,464 records set at Koln-Stammheim still stand.
Records are tracked for tmax, tmin, prcp, snwd: an element needs 30 years of data to be eligible.
Koln-Stammheim set a daily record high maximum temperature of 32.5 C (90.5 F) on 1 September 2024.

About the Station

Location: Germany, 50.99 latitude, 6.98 longitude.
Elevation: 43 m (141 ft).
Period of record: 1945 to 2024, 80 years.
Eligible elements: tmax, tmin, prcp, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Koln-Stammheim. 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 Koln-Stammheim, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	16.3 C (61.3 F)	-19.0 C (-2.2 F)	n/a	n/a
Feb	20.7 C (69.3 F)	-19.3 C (-2.7 F)	n/a	n/a
Mar	26.7 C (80.1 F)	-9.9 C (14.2 F)	n/a	n/a
Apr	30.1 C (86.2 F)	-4.9 C (23.2 F)	n/a	n/a
May	34.3 C (93.7 F)	-0.9 C (30.4 F)	n/a	n/a
Jun	37.9 C (100.2 F)	3.3 C (37.9 F)	n/a	n/a
Jul	41.1 C (106.0 F)	5.9 C (42.6 F)	n/a	n/a
Aug	38.3 C (100.9 F)	5.0 C (41.0 F)	n/a	n/a
Sep	34.9 C (94.8 F)	3.0 C (37.4 F)	n/a	n/a
Oct	27.3 C (81.1 F)	-2.9 C (26.8 F)	n/a	n/a
Nov	21.3 C (70.3 F)	-7.9 C (17.8 F)	n/a	n/a
Dec	18.4 C (65.1 F)	-14.9 C (5.2 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Koln-Stammheim still stand. 1956 holds the most, with 55.

Standing records at Koln-Stammheim by the year they were set
Year set	Standing records
1945	28
1946	31
1947	43
1948	18
1949	24
1950	14
1951	6
1952	23
1953	16
1954	14
1955	18
1956	55
1957	25
1958	20
1959	8
1960	14
1961	18
1962	30
1963	25
1964	21
1965	12
1966	16
1967	12
1968	19
1969	9
1970	9
1971	22
1972	12
1973	8
1974	13
1975	7
1976	22
1977	6
1978	15
1979	13
1980	12
1981	19
1982	5
1983	15
1984	16
1985	37
1986	23
1987	23
1988	8
1989	23
1990	12
1991	12
1992	11
1993	28
1994	13
1995	12
1996	16
1997	16
1998	19
1999	12
2000	21
2001	12
2002	17
2003	29
2004	15
2005	21
2006	28
2007	25
2008	5
2009	11
2010	22
2011	11
2012	22
2013	28
2014	17
2015	34
2016	19
2017	12
2018	29
2019	15
2020	23
2021	16
2022	19
2023	22
2024	13

All-Time Record Progression

9 new records

9 all-time records were set at Koln-Stammheim between 23 July 1988 and 14 July 2021. Each dot is a new record.

When Koln-Stammheim set new all-time records
Date	Kind	Detail
1988-07-23	Record high minimum temperature	Record high minimum temperature 22.0 C (71.6 F)
1989-07-07	Record high minimum temperature	Record high minimum temperature 23.2 C (73.8 F)
2003-08-07	Record high maximum temperature	Record high maximum temperature 38.0 C (100.4 F)
2003-08-08	Record high maximum temperature	Record high maximum temperature 38.3 C (100.9 F)
2006-07-20	Record high minimum temperature	Record high minimum temperature 23.7 C (74.7 F)
2017-07-19	Record daily precipitation	Record daily precipitation 95.0 mm (3.7 in)
2019-07-24	Record high maximum temperature	Record high maximum temperature 39.2 C (102.6 F)
2019-07-25	Record high maximum temperature	Record high maximum temperature 41.1 C (106.0 F)
2021-07-14	Record daily precipitation	Record daily precipitation 153.5 mm (6.0 in)

Wettest Day of Each Month

Jul: 153.5 mm (6.0 in)

The wettest day on record for each calendar month at Koln-Stammheim. The most was 153.5 mm (6.0 in) on 14 July 2021.

Record daily precipitation for each month at Koln-Stammheim
Month	Record daily precipitation (mm)	Date
Jan	29.3 mm (1.2 in)	28 January 2021
Feb	40.4 mm (1.6 in)	6 February 1984
Mar	32.8 mm (1.3 in)	24 March 1957
Apr	27.9 mm (1.1 in)	16 April 1959
May	59.3 mm (2.3 in)	2 May 2024
Jun	68.8 mm (2.7 in)	2 June 1961
Jul	153.5 mm (6.0 in)	14 July 2021
Aug	91.3 mm (3.6 in)	30 August 1968
Sep	44.2 mm (1.7 in)	12 September 1989
Oct	37.8 mm (1.5 in)	23 October 1966
Nov	43.8 mm (1.7 in)	18 November 2004
Dec	29.7 mm (1.2 in)	30 December 2002

Period of Record Coverage

1945 to 2024

80 years of record at Koln-Stammheim, 1945 to 2024. 3 years have data for under 90 percent of days and are left out of rankings: 1945, 2008, 2024.

Days with data per year at Koln-Stammheim
Year	Days with data	Share of year	Complete
1945	304	83%	No
1946	364	100%	Yes
1947	365	100%	Yes
1948	366	100%	Yes
1949	365	100%	Yes
1950	365	100%	Yes
1951	365	100%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	366	100%	Yes
1989	365	100%	Yes
1990	365	100%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	365	100%	Yes
1996	366	100%	Yes
1997	365	100%	Yes
1998	365	100%	Yes
1999	365	100%	Yes
2000	366	100%	Yes
2001	365	100%	Yes
2002	365	100%	Yes
2003	365	100%	Yes
2004	366	100%	Yes
2005	365	100%	Yes
2006	365	100%	Yes
2007	365	100%	Yes
2008	91	25%	No
2009	351	96%	Yes
2010	365	100%	Yes
2011	365	100%	Yes
2012	366	100%	Yes
2013	365	100%	Yes
2014	365	100%	Yes
2015	365	100%	Yes
2016	366	100%	Yes
2017	365	100%	Yes
2018	365	100%	Yes
2019	365	100%	Yes
2020	366	100%	Yes
2021	365	100%	Yes
2022	365	100%	Yes
2023	365	100%	Yes
2024	245	67%	No

Latest Records

Latest records at Koln-Stammheim
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 September 2024	Koln-Stammheim, DE	daily high max	32.5 C (90.5 F)	1.5 C (2.7 F)	63 years	29 of 100 (Routine)
29 August 2024	Koln-Stammheim, DE	daily high max	31.5 C (88.7 F)	1.2 C (2.2 F)	66 years	29 of 100 (Routine)
29 August 2024	Koln-Stammheim, DE	daily high min	19.8 C (67.6 F)	0.5 C (0.9 F)	5 years	10 of 100 (Routine)
17 August 2024	Koln-Stammheim, DE	daily high min	19.4 C (66.9 F)	0.4 C (0.7 F)	51 years	24 of 100 (Routine)
13 August 2024	Koln-Stammheim, DE	daily high max	35.3 C (95.5 F)	1.5 C (2.7 F)	58 years	28 of 100 (Routine)
6 May 2024	Koln-Stammheim, DE	daily rain	29.0 mm (1.1 in)	9.2 mm (0.36 in)	10 years	28 of 100 (Routine)
2 May 2024	Koln-Stammheim, DE	monthly rain	59.3 mm (2.3 in)	16.3 mm (0.6 in)	39 years	59 of 100 (Notable)
30 April 2024	Koln-Stammheim, DE	daily high max	26.8 C (80.2 F)	0.1 C (0.2 F)	31 years	17 of 100 (Routine)
13 April 2024	Koln-Stammheim, DE	daily high min (Tie)	11.7 C (53.1 F)	tie	72 years	7 of 100 (Routine)
7 April 2024	Koln-Stammheim, DE	daily high min	14.8 C (58.6 F)	0.7 C (1.3 F)	10 years	13 of 100 (Routine)
6 April 2024	Koln-Stammheim, DE	daily high min	13.1 C (55.6 F)	1.0 C (1.8 F)	75 years	32 of 100 (Routine)
6 April 2024	Koln-Stammheim, DE	daily high max	25.4 C (77.7 F)	1.7 C (3.1 F)	4 years	12 of 100 (Routine)
3 March 2024	Koln-Stammheim, DE	daily high max	18.3 C (64.9 F)	0.8 C (1.4 F)	72 years	30 of 100 (Routine)
16 February 2024	Koln-Stammheim, DE	daily high min	10.5 C (50.9 F)	1.0 C (1.8 F)	25 years	17 of 100 (Routine)
10 February 2024	Koln-Stammheim, DE	daily high min	8.1 C (46.6 F)	0.1 C (0.2 F)	49 years	22 of 100 (Routine)
9 February 2024	Koln-Stammheim, DE	daily high min	9.7 C (49.5 F)	0.8 C (1.4 F)	21 years	15 of 100 (Routine)
8 February 2024	Koln-Stammheim, DE	daily rain	19.6 mm (0.8 in)	1.7 mm (0.07 in)	40 years	20 of 100 (Routine)
27 November 2023	Koln-Stammheim, DE	daily rain	27.7 mm (1.1 in)	12.2 mm (0.5 in)	73 years	55 of 100 (Notable)
13 October 2023	Koln-Stammheim, DE	daily high min	16.8 C (62.2 F)	1.7 C (3.1 F)	4 years	12 of 100 (Routine)
12 October 2023	Koln-Stammheim, DE	daily high min	15.8 C (60.4 F)	0.7 C (1.3 F)	4 years	9 of 100 (Routine)

Climate Trend

77 complete years, 1946 to 2023

One stripe for each of 77 complete years at Koln-Stammheim, 1946 to 2023. Blue stripes are years cooler than the station's own mean of 11.2 C (52.1 F); red stripes are warmer. The coolest year was 1956, at 8.9 C (48.0 F), and the warmest was 2022, at 13.0 C (55.3 F). The strongest colour marks a difference of 2.3 C (4.1 F).

Annual mean temperature at Koln-Stammheim as warming stripes, 1946 to 2023
Year	Annual mean temperature	Difference from the station mean
1946	10.0 C	-1.12 C
1947	10.6 C	-0.55 C
1948	11.0 C	-0.20 C
1949	10.9 C	-0.27 C
1950	10.5 C	-0.64 C
1951	10.8 C	-0.37 C
1952	10.0 C	-1.13 C
1953	10.9 C	-0.21 C
1954	9.9 C	-1.26 C
1955	9.8 C	-1.40 C
1956	8.9 C	-2.24 C
1957	10.7 C	-0.42 C
1958	10.3 C	-0.81 C
1959	11.6 C	+0.40 C
1960	10.7 C	-0.42 C
1961	11.2 C	+0.07 C
1962	9.4 C	-1.77 C
1963	9.4 C	-1.78 C
1964	10.6 C	-0.55 C
1965	9.9 C	-1.22 C
1966	10.9 C	-0.25 C
1967	11.1 C	-0.06 C
1968	10.5 C	-0.65 C
1969	10.6 C	-0.56 C
1970	10.4 C	-0.78 C
1971	11.0 C	-0.20 C
1972	10.3 C	-0.82 C
1973	10.8 C	-0.40 C
1974	11.1 C	-0.04 C
1975	11.4 C	+0.28 C
1976	11.5 C	+0.38 C
1977	11.1 C	-0.01 C
1978	10.2 C	-0.92 C
1979	10.1 C	-1.08 C
1980	10.5 C	-0.69 C
1981	10.7 C	-0.46 C
1982	11.5 C	+0.33 C
1983	11.4 C	+0.20 C
1984	10.5 C	-0.66 C
1985	9.8 C	-1.38 C
1986	10.4 C	-0.72 C
1987	10.0 C	-1.11 C
1988	11.5 C	+0.31 C
1989	12.0 C	+0.89 C
1990	11.9 C	+0.71 C
1991	10.7 C	-0.44 C
1992	11.5 C	+0.39 C
1993	11.0 C	-0.18 C
1994	12.1 C	+0.98 C
1995	11.7 C	+0.51 C
1996	10.0 C	-1.16 C
1997	11.5 C	+0.34 C
1998	11.5 C	+0.32 C
1999	12.2 C	+1.00 C
2000	12.5 C	+1.34 C
2001	12.0 C	+0.80 C
2002	12.4 C	+1.23 C
2003	12.6 C	+1.43 C
2004	11.6 C	+0.47 C
2005	12.1 C	+0.93 C
2006	12.4 C	+1.27 C
2007	12.6 C	+1.43 C
2009	11.4 C	+0.23 C
2010	10.3 C	-0.84 C
2011	12.2 C	+1.04 C
2012	11.5 C	+0.30 C
2013	11.0 C	-0.15 C
2014	12.7 C	+1.56 C
2015	12.0 C	+0.85 C
2016	11.8 C	+0.64 C
2017	12.0 C	+0.83 C
2018	12.8 C	+1.60 C
2019	12.4 C	+1.28 C
2020	12.9 C	+1.76 C
2021	11.5 C	+0.34 C
2022	13.0 C	+1.81 C
2023	12.9 C	+1.76 C

The annual mean temperature here has risen by 0.3 C (0.2 to 0.4) per decade over 1946 to 2023. In Fahrenheit: 0.5 F (0.4 to 0.7) per decade. The slope is a straight line fitted to 77 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Koln-Stammheim
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.3 C (0.2 to 0.4) per decade	0.5 F (0.4 to 0.7) per decade	1946 to 2023	77	Rise
Mean daily maximum	0.3 C (0.2 to 0.4) per decade	0.6 F (0.4 to 0.7) per decade	1946 to 2023	77	Rise
Mean daily minimum	0.3 C (0.2 to 0.4) per decade	0.5 F (0.4 to 0.6) per decade	1946 to 2023	77	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

1945 to 2024

Yearly extremes at Koln-Stammheim: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	41.1 C (106.0 F)	2019	33.6 C (92.4 F)	80
Coldest night (TNn)	-19.3 C (-2.7 F)	1956	-8.6 C (16.5 F)	80
Wettest day (Rx1day)	153.5 mm (6.0 in)	2021	31.5 mm (1.2 in)	80
Wettest five days (Rx5day)	185.9 mm (7.3 in)	2021	62.6 mm (2.5 in)	80
Longest dry spell (CDD)	38 days	2007	20 days	80

Hottest day (TXx)

The hottest day of the year at Koln-Stammheim, 1945 to 2024. The record is 41.1 C (106.0 F) in 2019, marked on the chart; the median year is 33.6 C (92.4 F).

Hottest day (TXx) at Koln-Stammheim by year
Year	Hottest day (TXx)
1945	32.7 C (90.9 F)
1946	33.9 C (93.0 F)
1947	37.9 C (100.2 F)
1948	34.1 C (93.4 F)
1949	33.4 C (92.1 F)
1950	32.7 C (90.9 F)
1951	30.4 C (86.7 F)
1952	34.0 C (93.2 F)
1953	33.1 C (91.6 F)
1954	31.5 C (88.7 F)
1955	33.5 C (92.3 F)
1956	30.5 C (86.9 F)
1957	36.0 C (96.8 F)
1958	30.3 C (86.5 F)
1959	36.5 C (97.7 F)
1960	31.0 C (87.8 F)
1961	33.4 C (92.1 F)
1962	31.5 C (88.7 F)
1963	32.8 C (91.0 F)
1964	35.6 C (96.1 F)
1965	29.9 C (85.8 F)
1966	33.8 C (92.8 F)
1967	32.0 C (89.6 F)
1968	32.6 C (90.7 F)
1969	32.6 C (90.7 F)
1970	31.0 C (87.8 F)
1971	32.0 C (89.6 F)
1972	34.2 C (93.6 F)
1973	32.8 C (91.0 F)
1974	33.5 C (92.3 F)
1975	33.5 C (92.3 F)
1976	36.6 C (97.9 F)
1977	32.3 C (90.1 F)
1978	32.1 C (89.8 F)
1979	30.7 C (87.3 F)
1980	31.6 C (88.9 F)
1981	32.0 C (89.6 F)
1982	32.0 C (89.6 F)
1983	34.4 C (93.9 F)
1984	33.1 C (91.6 F)
1985	32.2 C (90.0 F)
1986	35.1 C (95.2 F)
1987	30.9 C (87.6 F)
1988	30.1 C (86.2 F)
1989	32.5 C (90.5 F)
1990	35.3 C (95.5 F)
1991	33.7 C (92.7 F)
1992	34.6 C (94.3 F)
1993	30.1 C (86.2 F)
1994	35.3 C (95.5 F)
1995	34.6 C (94.3 F)
1996	32.3 C (90.1 F)
1997	32.8 C (91.0 F)
1998	33.0 C (91.4 F)
1999	32.0 C (89.6 F)
2000	35.0 C (95.0 F)
2001	35.5 C (95.9 F)
2002	37.0 C (98.6 F)
2003	38.3 C (100.9 F)
2004	32.8 C (91.0 F)
2005	33.7 C (92.7 F)
2006	36.2 C (97.2 F)
2007	35.5 C (95.9 F)
2008	14.5 C (58.1 F)
2009	34.9 C (94.8 F)
2010	36.5 C (97.7 F)
2011	33.6 C (92.5 F)
2012	37.6 C (99.7 F)
2013	36.8 C (98.2 F)
2014	33.6 C (92.5 F)
2015	37.1 C (98.8 F)
2016	35.2 C (95.4 F)
2017	37.0 C (98.6 F)
2018	38.2 C (100.8 F)
2019	41.1 C (106.0 F)
2020	37.4 C (99.3 F)
2021	34.7 C (94.5 F)
2022	37.9 C (100.2 F)
2023	35.8 C (96.4 F)
2024	35.3 C (95.5 F)

Coldest night (TNn)

The coldest night of the year at Koln-Stammheim, 1945 to 2024. The record is -19.3 C (-2.7 F) in 1956, marked on the chart; the median year is -8.6 C (16.5 F).

Coldest night (TNn) at Koln-Stammheim by year
Year	Coldest night (TNn)
1945	-16.9 C (1.6 F)
1946	-14.9 C (5.2 F)
1947	-14.7 C (5.5 F)
1948	-9.7 C (14.5 F)
1949	-7.4 C (18.7 F)
1950	-14.5 C (5.9 F)
1951	-4.2 C (24.4 F)
1952	-7.0 C (19.4 F)
1953	-12.6 C (9.3 F)
1954	-14.1 C (6.6 F)
1955	-12.1 C (10.2 F)
1956	-19.3 C (-2.7 F)
1957	-6.1 C (21.0 F)
1958	-8.0 C (17.6 F)
1959	-5.6 C (21.9 F)
1960	-14.4 C (6.1 F)
1961	-10.6 C (12.9 F)
1962	-10.7 C (12.7 F)
1963	-19.0 C (-2.2 F)
1964	-9.0 C (15.8 F)
1965	-7.9 C (17.8 F)
1966	-12.8 C (9.0 F)
1967	-8.4 C (16.9 F)
1968	-14.1 C (6.6 F)
1969	-11.1 C (12.0 F)
1970	-10.2 C (13.6 F)
1971	-10.0 C (14.0 F)
1972	-10.2 C (13.6 F)
1973	-10.0 C (14.0 F)
1974	-3.3 C (26.1 F)
1975	-6.6 C (20.1 F)
1976	-10.5 C (13.1 F)
1977	-4.4 C (24.1 F)
1978	-14.2 C (6.4 F)
1979	-15.3 C (4.5 F)
1980	-8.0 C (17.6 F)
1981	-9.2 C (15.4 F)
1982	-14.1 C (6.6 F)
1983	-6.5 C (20.3 F)
1984	-5.0 C (23.0 F)
1985	-16.2 C (2.8 F)
1986	-15.3 C (4.5 F)
1987	-13.7 C (7.3 F)
1988	-6.7 C (19.9 F)
1989	-4.1 C (24.6 F)
1990	-3.1 C (26.4 F)
1991	-12.1 C (10.2 F)
1992	-5.7 C (21.7 F)
1993	-8.7 C (16.3 F)
1994	-8.0 C (17.6 F)
1995	-9.0 C (15.8 F)
1996	-10.5 C (13.1 F)
1997	-13.1 C (8.4 F)
1998	-8.5 C (16.7 F)
1999	-7.6 C (18.3 F)
2000	-6.0 C (21.2 F)
2001	-6.4 C (20.5 F)
2002	-5.9 C (21.4 F)
2003	-10.6 C (12.9 F)
2004	-5.0 C (23.0 F)
2005	-7.3 C (18.9 F)
2006	-8.0 C (17.6 F)
2007	-5.2 C (22.6 F)
2008	-6.7 C (19.9 F)
2009	-15.1 C (4.8 F)
2010	-9.3 C (15.3 F)
2011	-5.9 C (21.4 F)
2012	-13.6 C (7.5 F)
2013	-8.1 C (17.4 F)
2014	-4.2 C (24.4 F)
2015	-4.3 C (24.3 F)
2016	-6.6 C (20.1 F)
2017	-7.2 C (19.0 F)
2018	-7.8 C (18.0 F)
2019	-7.0 C (19.4 F)
2020	-3.5 C (25.7 F)
2021	-10.0 C (14.0 F)
2022	-9.2 C (15.4 F)
2023	-4.6 C (23.7 F)
2024	-7.7 C (18.1 F)

Wettest day (Rx1day)

The wettest day of the year at Koln-Stammheim, 1945 to 2024. The record is 153.5 mm (6.0 in) in 2021, marked on the chart; the median year is 31.5 mm (1.2 in).

Wettest day (Rx1day) at Koln-Stammheim by year
Year	Wettest day (Rx1day)
1945	41.3 mm (1.6 in)
1946	16.9 mm (0.7 in)
1947	25.0 mm (1.0 in)
1948	23.5 mm (0.9 in)
1949	45.4 mm (1.8 in)
1950	30.2 mm (1.2 in)
1951	37.4 mm (1.5 in)
1952	35.2 mm (1.4 in)
1953	25.2 mm (1.0 in)
1954	42.1 mm (1.7 in)
1955	26.4 mm (1.0 in)
1956	39.8 mm (1.6 in)
1957	32.8 mm (1.3 in)
1958	53.7 mm (2.1 in)
1959	31.4 mm (1.2 in)
1960	28.3 mm (1.1 in)
1961	68.8 mm (2.7 in)
1962	24.3 mm (1.0 in)
1963	31.0 mm (1.2 in)
1964	25.1 mm (1.0 in)
1965	47.3 mm (1.9 in)
1966	37.8 mm (1.5 in)
1967	43.3 mm (1.7 in)
1968	91.3 mm (3.6 in)
1969	27.9 mm (1.1 in)
1970	26.5 mm (1.0 in)
1971	29.6 mm (1.2 in)
1972	31.7 mm (1.2 in)
1973	22.6 mm (0.9 in)
1974	31.1 mm (1.2 in)
1975	23.7 mm (0.9 in)
1976	14.8 mm (0.6 in)
1977	24.0 mm (0.9 in)
1978	20.8 mm (0.8 in)
1979	28.0 mm (1.1 in)
1980	33.8 mm (1.3 in)
1981	28.7 mm (1.1 in)
1982	29.9 mm (1.2 in)
1983	25.1 mm (1.0 in)
1984	43.0 mm (1.7 in)
1985	31.5 mm (1.2 in)
1986	29.2 mm (1.1 in)
1987	31.5 mm (1.2 in)
1988	21.1 mm (0.8 in)
1989	44.2 mm (1.7 in)
1990	41.1 mm (1.6 in)
1991	32.2 mm (1.3 in)
1992	28.6 mm (1.1 in)
1993	38.4 mm (1.5 in)
1994	29.2 mm (1.1 in)
1995	46.5 mm (1.8 in)
1996	29.3 mm (1.2 in)
1997	35.0 mm (1.4 in)
1998	39.2 mm (1.5 in)
1999	31.9 mm (1.3 in)
2000	35.1 mm (1.4 in)
2001	38.3 mm (1.5 in)
2002	29.7 mm (1.2 in)
2003	42.3 mm (1.7 in)
2004	43.8 mm (1.7 in)
2005	68.3 mm (2.7 in)
2006	29.0 mm (1.1 in)
2007	34.0 mm (1.3 in)
2008	13.0 mm (0.5 in)
2009	25.2 mm (1.0 in)
2010	36.0 mm (1.4 in)
2011	30.0 mm (1.2 in)
2012	19.5 mm (0.8 in)
2013	25.7 mm (1.0 in)
2014	49.1 mm (1.9 in)
2015	40.0 mm (1.6 in)
2016	37.4 mm (1.5 in)
2017	95.0 mm (3.7 in)
2018	19.3 mm (0.8 in)
2019	29.2 mm (1.1 in)
2020	33.6 mm (1.3 in)
2021	153.5 mm (6.0 in)
2022	22.5 mm (0.9 in)
2023	27.7 mm (1.1 in)
2024	59.3 mm (2.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Koln-Stammheim, 1945 to 2024. The record is 185.9 mm (7.3 in) in 2021, marked on the chart; the median year is 62.6 mm (2.5 in).

Wettest five days (Rx5day) at Koln-Stammheim by year
Year	Wettest five days (Rx5day)
1945	66.7 mm (2.6 in)
1946	40.6 mm (1.6 in)
1947	40.6 mm (1.6 in)
1948	58.5 mm (2.3 in)
1949	81.2 mm (3.2 in)
1950	43.3 mm (1.7 in)
1951	74.7 mm (2.9 in)
1952	63.9 mm (2.5 in)
1953	55.5 mm (2.2 in)
1954	65.5 mm (2.6 in)
1955	37.6 mm (1.5 in)
1956	79.7 mm (3.1 in)
1957	59.8 mm (2.4 in)
1958	60.6 mm (2.4 in)
1959	47.4 mm (1.9 in)
1960	52.9 mm (2.1 in)
1961	111.3 mm (4.4 in)
1962	50.2 mm (2.0 in)
1963	41.6 mm (1.6 in)
1964	62.8 mm (2.5 in)
1965	71.8 mm (2.8 in)
1966	66.1 mm (2.6 in)
1967	49.8 mm (2.0 in)
1968	150.3 mm (5.9 in)
1969	81.9 mm (3.2 in)
1970	46.1 mm (1.8 in)
1971	47.3 mm (1.9 in)
1972	47.4 mm (1.9 in)
1973	48.2 mm (1.9 in)
1974	40.8 mm (1.6 in)
1975	40.8 mm (1.6 in)
1976	33.1 mm (1.3 in)
1977	66.4 mm (2.6 in)
1978	47.4 mm (1.9 in)
1979	63.7 mm (2.5 in)
1980	62.7 mm (2.5 in)
1981	71.6 mm (2.8 in)
1982	48.9 mm (1.9 in)
1983	57.5 mm (2.3 in)
1984	76.1 mm (3.0 in)
1985	54.9 mm (2.2 in)
1986	64.3 mm (2.5 in)
1987	73.6 mm (2.9 in)
1988	62.7 mm (2.5 in)
1989	85.9 mm (3.4 in)
1990	66.3 mm (2.6 in)
1991	61.8 mm (2.4 in)
1992	64.1 mm (2.5 in)
1993	63.7 mm (2.5 in)
1994	55.9 mm (2.2 in)
1995	67.4 mm (2.7 in)
1996	52.6 mm (2.1 in)
1997	72.3 mm (2.8 in)
1998	81.8 mm (3.2 in)
1999	48.5 mm (1.9 in)
2000	70.4 mm (2.8 in)
2001	67.7 mm (2.7 in)
2002	70.2 mm (2.8 in)
2003	76.5 mm (3.0 in)
2004	62.5 mm (2.5 in)
2005	120.3 mm (4.7 in)
2006	48.5 mm (1.9 in)
2007	70.0 mm (2.8 in)
2008	32.2 mm (1.3 in)
2009	49.4 mm (1.9 in)
2010	84.7 mm (3.3 in)
2011	51.5 mm (2.0 in)
2012	48.0 mm (1.9 in)
2013	48.8 mm (1.9 in)
2014	136.2 mm (5.4 in)
2015	72.3 mm (2.8 in)
2016	63.7 mm (2.5 in)
2017	102.8 mm (4.0 in)
2018	48.6 mm (1.9 in)
2019	51.4 mm (2.0 in)
2020	44.8 mm (1.8 in)
2021	185.9 mm (7.3 in)
2022	43.3 mm (1.7 in)
2023	48.9 mm (1.9 in)
2024	101.7 mm (4.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Koln-Stammheim, 1945 to 2024. The record is 38 days in 2007, marked on the chart; the median year is 20 days.

Longest dry spell (CDD) at Koln-Stammheim by year
Year	Longest dry spell (CDD)
1945	14 days
1946	16 days
1947	33 days
1948	25 days
1949	20 days
1950	12 days
1951	29 days
1952	18 days
1953	27 days
1954	16 days
1955	20 days
1956	27 days
1957	14 days
1958	20 days
1959	30 days
1960	22 days
1961	16 days
1962	24 days
1963	20 days
1964	16 days
1965	13 days
1966	15 days
1967	14 days
1968	24 days
1969	19 days
1970	22 days
1971	27 days
1972	22 days
1973	22 days
1974	25 days
1975	22 days
1976	22 days
1977	17 days
1978	15 days
1979	20 days
1980	19 days
1981	16 days
1982	20 days
1983	17 days
1984	17 days
1985	23 days
1986	27 days
1987	18 days
1988	25 days
1989	21 days
1990	26 days
1991	25 days
1992	15 days
1993	19 days
1994	17 days
1995	19 days
1996	16 days
1997	31 days
1998	19 days
1999	18 days
2000	9 days
2001	15 days
2002	23 days
2003	22 days
2004	17 days
2005	17 days
2006	15 days
2007	38 days
2008	17 days
2009	16 days
2010	20 days
2011	27 days
2012	17 days
2013	20 days
2014	18 days
2015	23 days
2016	21 days
2017	28 days
2018	23 days
2019	21 days
2020	28 days
2021	14 days
2022	19 days
2023	17 days
2024	13 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

76 years with a frost

Across 76 years with a frost, the median last spring frost at Koln-Stammheim falls on 31 March and the median first autumn frost on 14 November, which leaves a median of 231 days between them.

In 1992 to 2023 the median growing season was 238 days. That is 21 days more than in 1946 to 1975.

Fitted over all years, the growing season changes by +3.8 days per decade at this station.

Frost dates and growing season at Koln-Stammheim
Measure	Median, all years	Earliest period (1946 to 1975)	Recent period (1992 to 2023)	Recent against earliest	Fitted trend
Last spring frost	31 March	7 April	26 March	12 days earlier	-1.8 days per decade
First autumn frost	14 November	8 November	17 November	9 days later	+2.0 days per decade
Growing days	231 days	217 days	238 days	21 days more	+3.8 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

77 years, 1946 to 2023

A day with at least 30.9 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 110.9 mm (4.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Koln-Stammheim: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	30.9 mm (1.2 in)
5 years	42.6 mm (1.7 in)
10 years	53.3 mm (2.1 in)
25 years	71.2 mm (2.8 in)
50 years	88.7 mm (3.5 in)
100 years	110.9 mm (4.4 in)	Longer than the 77 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, 77 years of values from 1946 to 2023.

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: 153.5 mm (6.0 in) in 2021; 95.0 mm (3.7 in) in 2017; 91.3 mm (3.6 in) in 1968.

Station Changes

2 suspected

2 changes were suspected in the annual mean temperature of Koln-Stammheim, at 1983 and 2001. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1983 ran 0.1 C (0.1 F) lower than in the years before (possible change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 2001 ran 0.2 C (0.3 F) higher than in the years before (possible change).

Suspected changes in the annual mean temperature at Koln-Stammheim, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1983	-0.1	-0.1	possible	5
2001	+0.2	+0.3	possible	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.

Climate Twins

2009 to 2023 against 1961 to 1990

Over 2009 to 2023, Koln-Stammheim had a mean temperature of 12.0 C (53.6 F) and 764.0 mm (30.1 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Le Bourget (France, 395 km away), Mesa del Huracan (Mexico, 9,041 km away) and Braganca (Portugal, 1,462 km away).

Climate twins of Koln-Stammheim: stations whose 1961 to 1990 climate is closest to its 2009 to 2023 climate
Twin station	Country	Distance away	Mean temperature, 1961-1990	Rain a year, 1961-1990	Climate difference
Le Bourget	France	395 km (245 mi)	11.7 C (53.0 F)	641.5 mm (25.3 in)	0.81
Mesa del Huracan	Mexico	9,041 km (5,618 mi)	11.6 C (52.8 F)	727.8 mm (28.7 in)	0.88
Braganca	Portugal	1,462 km (908 mi)	12.2 C (53.9 F)	742.7 mm (29.2 in)	0.94

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

Data for Koln-Stammheim standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Koln-Stammheim 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.

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