Bad-Ostinghausen Sassendorf Weather Records (GME00128254)

Record envelope, standing records and threshold days for Bad-Ostinghausen Sassendorf (GME00128254), Germany, with 31 years of record.

Key Facts for Bad-Ostinghausen Sassendorf

Bad-Ostinghausen Sassendorf (GME00128254) is a weather station in Germany at 51.63 latitude and 8.19 longitude, 81 m (266 ft) above sea level.
The station reports from 1950 to 1980, 31 years of record.
1,464 records set at Bad-Ostinghausen Sassendorf still stand.
Records are tracked for tmax, tmin, prcp, snwd: an element needs 30 years of data to be eligible.
Bad-Ostinghausen Sassendorf set a daily record high maximum temperature of 28.7 C (83.7 F) on 14 June 1980.

About the Station

Location: Germany, 51.63 latitude, 8.19 longitude.
Elevation: 81 m (266 ft).
Period of record: 1950 to 1980, 31 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 Bad-Ostinghausen Sassendorf. 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 Bad-Ostinghausen Sassendorf, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	13.8 C (56.8 F)	-25.4 C (-13.7 F)	n/a	n/a
Feb	19.7 C (67.5 F)	-25.8 C (-14.4 F)	n/a	n/a
Mar	25.9 C (78.6 F)	-17.7 C (0.1 F)	n/a	n/a
Apr	32.8 C (91.0 F)	-6.1 C (21.0 F)	n/a	n/a
May	32.8 C (91.0 F)	-2.4 C (27.7 F)	n/a	n/a
Jun	34.0 C (93.2 F)	0.6 C (33.1 F)	n/a	n/a
Jul	37.0 C (98.6 F)	2.7 C (36.9 F)	n/a	n/a
Aug	35.6 C (96.1 F)	1.6 C (34.9 F)	n/a	n/a
Sep	31.4 C (88.5 F)	-1.0 C (30.2 F)	n/a	n/a
Oct	27.7 C (81.9 F)	-5.0 C (23.0 F)	n/a	n/a
Nov	21.2 C (70.2 F)	-15.6 C (3.9 F)	n/a	n/a
Dec	17.3 C (63.1 F)	-17.9 C (-0.2 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Bad-Ostinghausen Sassendorf still stand. 1963 holds the most, with 72.

Standing records at Bad-Ostinghausen Sassendorf by the year they were set
Year set	Standing records
1950	39
1951	38
1952	38
1953	53
1954	40
1955	38
1956	66
1957	55
1958	54
1959	53
1960	34
1961	63
1962	54
1963	72
1964	55
1965	33
1966	71
1967	56
1968	54
1969	69
1970	24
1971	58
1972	47
1973	25
1974	53
1975	46
1976	38
1977	36
1978	50
1979	43
1980	9

Wettest Day of Each Month

May: 69.5 mm (2.7 in)

The wettest day on record for each calendar month at Bad-Ostinghausen Sassendorf. The most was 69.5 mm (2.7 in) on 23 May 1978.

Record daily precipitation for each month at Bad-Ostinghausen Sassendorf
Month	Record daily precipitation (mm)	Date
Jan	36.8 mm (1.4 in)	2 January 1952
Feb	25.8 mm (1.0 in)	12 February 1962
Mar	27.9 mm (1.1 in)	8 March 1958
Apr	39.6 mm (1.6 in)	24 April 1971
May	69.5 mm (2.7 in)	23 May 1978
Jun	43.9 mm (1.7 in)	30 June 1972
Jul	42.1 mm (1.7 in)	19 July 1956
Aug	47.4 mm (1.9 in)	22 August 1966
Sep	33.1 mm (1.3 in)	23 September 1968
Oct	30.5 mm (1.2 in)	7 October 1960
Nov	27.4 mm (1.1 in)	12 November 1951
Dec	26.2 mm (1.0 in)	15 December 1978

Period of Record Coverage

1950 to 1980

31 years of record at Bad-Ostinghausen Sassendorf, 1950 to 1980. 1 years have data for under 90 percent of days and are left out of rankings: 1980.

Days with data per year at Bad-Ostinghausen Sassendorf
Year	Days with data	Share of year	Complete
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	182	50%	No

Latest Records

Latest records at Bad-Ostinghausen Sassendorf
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
14 June 1980	Bad-Ostinghausen Sassendorf, DE	daily high max	28.7 C (83.7 F)	0.7 C (1.3 F)	18 years	9 of 100 (Routine)
14 June 1980	Bad-Ostinghausen Sassendorf, DE	daily high min	16.7 C (62.1 F)	0.9 C (1.6 F)	16 years	9 of 100 (Routine)
23 May 1980	Bad-Ostinghausen Sassendorf, DE	daily low min	-0.9 C (30.4 F)	0.3 C (0.5 F)	25 years	10 of 100 (Routine)
16 May 1980	Bad-Ostinghausen Sassendorf, DE	daily low min	0.2 C (32.4 F)	0.8 C (1.4 F)	7 years	7 of 100 (Routine)
15 May 1980	Bad-Ostinghausen Sassendorf, DE	daily low min	1.4 C (34.5 F)	0.4 C (0.7 F)	21 years	10 of 100 (Routine)
10 May 1980	Bad-Ostinghausen Sassendorf, DE	daily low min	-0.9 C (30.4 F)	1.6 C (2.9 F)	27 years	15 of 100 (Routine)
25 April 1980	Bad-Ostinghausen Sassendorf, DE	daily rain	16.3 mm (0.6 in)	7.1 mm (0.28 in)	10 years	20 of 100 (Routine)
22 April 1980	Bad-Ostinghausen Sassendorf, DE	daily low max	7.0 C (44.6 F)	0.5 C (0.9 F)	13 years	7 of 100 (Routine)
20 April 1980	Bad-Ostinghausen Sassendorf, DE	daily snow depth	1.0 cm (0.4 in)	1.0 cm (0.4 in)	30 years	13 of 100 (Routine)
1 April 1980	Bad-Ostinghausen Sassendorf, DE	daily rain	11.2 mm (0.4 in)	1.1 mm (0.04 in)	19 years	10 of 100 (Routine)
28 March 1980	Bad-Ostinghausen Sassendorf, DE	daily high min	9.5 C (49.1 F)	2.1 C (3.8 F)	15 years	11 of 100 (Routine)
28 March 1980	Bad-Ostinghausen Sassendorf, DE	daily rain	7.5 mm (0.30 in)	0.6 mm (0.02 in)	14 years	8 of 100 (Routine)
23 February 1980	Bad-Ostinghausen Sassendorf, DE	daily high max (Tie)	13.0 C (55.4 F)	tie	12 years	1 of 100 (Routine)
9 February 1980	Bad-Ostinghausen Sassendorf, DE	daily high max	14.2 C (57.6 F)	1.7 C (3.1 F)	28 years	14 of 100 (Routine)
5 February 1980	Bad-Ostinghausen Sassendorf, DE	daily rain	19.2 mm (0.8 in)	4.8 mm (0.19 in)	9 years	17 of 100 (Routine)
3 February 1980	Bad-Ostinghausen Sassendorf, DE	daily rain	6.9 mm (0.27 in)	3.1 mm (0.12 in)	16 years	14 of 100 (Routine)
1 February 1980	Bad-Ostinghausen Sassendorf, DE	daily snow depth (Tie)	6.0 cm (2.4 in)	tie	20 years	2 of 100 (Routine)
31 January 1980	Bad-Ostinghausen Sassendorf, DE	daily rain	14.8 mm (0.6 in)	7.7 mm (0.30 in)	29 years	20 of 100 (Routine)

Climate Trend

30 complete years, 1950 to 1979

One stripe for each of 30 complete years at Bad-Ostinghausen Sassendorf, 1950 to 1979. Blue stripes are years cooler than the station's own mean of 9.2 C (48.5 F); red stripes are warmer. The coolest year was 1963, at 7.7 C (45.9 F), and the warmest was 1961, at 10.2 C (50.4 F). The strongest colour marks a difference of 1.5 C (2.7 F).

Annual mean temperature at Bad-Ostinghausen Sassendorf as warming stripes, 1950 to 1979
Year	Annual mean temperature	Difference from the station mean
1950	9.7 C	+0.49 C
1951	9.8 C	+0.62 C
1952	8.9 C	-0.24 C
1953	9.7 C	+0.56 C
1954	8.8 C	-0.42 C
1955	8.3 C	-0.89 C
1956	7.8 C	-1.39 C
1957	9.5 C	+0.35 C
1958	9.0 C	-0.14 C
1959	10.0 C	+0.80 C
1960	9.5 C	+0.32 C
1961	10.2 C	+1.04 C
1962	8.0 C	-1.15 C
1963	7.7 C	-1.46 C
1964	9.1 C	-0.08 C
1965	8.7 C	-0.53 C
1966	9.6 C	+0.42 C
1967	10.0 C	+0.85 C
1968	9.4 C	+0.19 C
1969	9.3 C	+0.15 C
1970	9.1 C	-0.13 C
1971	9.6 C	+0.39 C
1972	8.9 C	-0.30 C
1973	9.0 C	-0.18 C
1974	9.7 C	+0.55 C
1975	10.0 C	+0.79 C
1976	9.4 C	+0.20 C
1977	9.6 C	+0.39 C
1978	8.6 C	-0.54 C
1979	8.5 C	-0.67 C

The fitted trend in annual mean temperature here over 1950 to 1979 is 0.02 C (-0.27 to 0.31) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.04 F (-0.48 to 0.57) per decade. The slope is a straight line fitted to 30 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Bad-Ostinghausen Sassendorf
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.02 C (-0.27 to 0.31) per decade	0.04 F (-0.48 to 0.57) per decade	1950 to 1979	30	Not clearly different from zero
Mean daily maximum	-0.1 C (-0.5 to 0.3) per decade	-0.2 F (-0.8 to 0.5) per decade	1950 to 1979	30	Not clearly different from zero
Mean daily minimum	0.2 C (-0.1 to 0.5) per decade	0.3 F (-0.3 to 0.8) per decade	1950 to 1979	30	Not clearly different from zero

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

1950 to 1980

Yearly extremes at Bad-Ostinghausen Sassendorf: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.0 C (98.6 F)	1959	32.4 C (90.3 F)	31
Coldest night (TNn)	-25.8 C (-14.4 F)	1956	-16.3 C (2.7 F)	31
Wettest day (Rx1day)	69.5 mm (2.7 in)	1978	28.3 mm (1.1 in)	31
Wettest five days (Rx5day)	110.8 mm (4.4 in)	1978	52.8 mm (2.1 in)	31
Longest dry spell (CDD)	41 days	1959	20 days	31

Hottest day (TXx)

The hottest day of the year at Bad-Ostinghausen Sassendorf, 1950 to 1980. The record is 37.0 C (98.6 F) in 1959, marked on the chart; the median year is 32.4 C (90.3 F).

Hottest day (TXx) at Bad-Ostinghausen Sassendorf by year
Year	Hottest day (TXx)
1950	32.4 C (90.3 F)
1951	31.5 C (88.7 F)
1952	36.1 C (97.0 F)
1953	32.0 C (89.6 F)
1954	30.2 C (86.4 F)
1955	30.9 C (87.6 F)
1956	27.8 C (82.0 F)
1957	33.4 C (92.1 F)
1958	31.2 C (88.2 F)
1959	37.0 C (98.6 F)
1960	29.6 C (85.3 F)
1961	32.0 C (89.6 F)
1962	29.0 C (84.2 F)
1963	35.4 C (95.7 F)
1964	35.6 C (96.1 F)
1965	29.8 C (85.6 F)
1966	32.6 C (90.7 F)
1967	32.8 C (91.0 F)
1968	32.8 C (91.0 F)
1969	35.0 C (95.0 F)
1970	32.9 C (91.2 F)
1971	35.0 C (95.0 F)
1972	32.7 C (90.9 F)
1973	31.4 C (88.5 F)
1974	33.8 C (92.8 F)
1975	35.2 C (95.4 F)
1976	34.2 C (93.6 F)
1977	29.5 C (85.1 F)
1978	31.5 C (88.7 F)
1979	30.4 C (86.7 F)
1980	28.7 C (83.7 F)

Coldest night (TNn)

The coldest night of the year at Bad-Ostinghausen Sassendorf, 1950 to 1980. The record is -25.8 C (-14.4 F) in 1956, marked on the chart; the median year is -16.3 C (2.7 F).

Coldest night (TNn) at Bad-Ostinghausen Sassendorf by year
Year	Coldest night (TNn)
1950	-17.9 C (-0.2 F)
1951	-8.0 C (17.6 F)
1952	-7.8 C (18.0 F)
1953	-18.7 C (-1.7 F)
1954	-16.3 C (2.7 F)
1955	-19.4 C (-2.9 F)
1956	-25.8 C (-14.4 F)
1957	-16.0 C (3.2 F)
1958	-17.7 C (0.1 F)
1959	-8.5 C (16.7 F)
1960	-21.2 C (-6.2 F)
1961	-11.5 C (11.3 F)
1962	-13.2 C (8.2 F)
1963	-22.0 C (-7.6 F)
1964	-17.0 C (1.4 F)
1965	-15.6 C (3.9 F)
1966	-19.0 C (-2.2 F)
1967	-11.0 C (12.2 F)
1968	-25.4 C (-13.7 F)
1969	-17.8 C (0.0 F)
1970	-15.0 C (5.0 F)
1971	-20.4 C (-4.7 F)
1972	-13.0 C (8.6 F)
1973	-14.5 C (5.9 F)
1974	-3.2 C (26.2 F)
1975	-10.9 C (12.4 F)
1976	-16.6 C (2.1 F)
1977	-7.1 C (19.2 F)
1978	-18.4 C (-1.1 F)
1979	-22.4 C (-8.3 F)
1980	-9.9 C (14.2 F)

Wettest day (Rx1day)

The wettest day of the year at Bad-Ostinghausen Sassendorf, 1950 to 1980. The record is 69.5 mm (2.7 in) in 1978, marked on the chart; the median year is 28.3 mm (1.1 in).

Wettest day (Rx1day) at Bad-Ostinghausen Sassendorf by year
Year	Wettest day (Rx1day)
1950	23.3 mm (0.9 in)
1951	27.4 mm (1.1 in)
1952	36.8 mm (1.4 in)
1953	37.1 mm (1.5 in)
1954	26.3 mm (1.0 in)
1955	19.7 mm (0.8 in)
1956	42.1 mm (1.7 in)
1957	22.2 mm (0.9 in)
1958	45.4 mm (1.8 in)
1959	23.1 mm (0.9 in)
1960	40.0 mm (1.6 in)
1961	27.3 mm (1.1 in)
1962	25.8 mm (1.0 in)
1963	22.6 mm (0.9 in)
1964	22.6 mm (0.9 in)
1965	37.5 mm (1.5 in)
1966	47.4 mm (1.9 in)
1967	36.2 mm (1.4 in)
1968	45.1 mm (1.8 in)
1969	28.4 mm (1.1 in)
1970	28.3 mm (1.1 in)
1971	39.6 mm (1.6 in)
1972	43.9 mm (1.7 in)
1973	19.7 mm (0.8 in)
1974	40.3 mm (1.6 in)
1975	21.9 mm (0.9 in)
1976	25.2 mm (1.0 in)
1977	21.2 mm (0.8 in)
1978	69.5 mm (2.7 in)
1979	31.6 mm (1.2 in)
1980	19.2 mm (0.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Bad-Ostinghausen Sassendorf, 1950 to 1980. The record is 110.8 mm (4.4 in) in 1978, marked on the chart; the median year is 52.8 mm (2.1 in).

Wettest five days (Rx5day) at Bad-Ostinghausen Sassendorf by year
Year	Wettest five days (Rx5day)
1950	48.2 mm (1.9 in)
1951	49.0 mm (1.9 in)
1952	47.0 mm (1.9 in)
1953	60.8 mm (2.4 in)
1954	53.2 mm (2.1 in)
1955	52.8 mm (2.1 in)
1956	94.6 mm (3.7 in)
1957	62.3 mm (2.5 in)
1958	83.0 mm (3.3 in)
1959	43.1 mm (1.7 in)
1960	70.9 mm (2.8 in)
1961	66.4 mm (2.6 in)
1962	43.6 mm (1.7 in)
1963	38.7 mm (1.5 in)
1964	43.5 mm (1.7 in)
1965	98.7 mm (3.9 in)
1966	83.8 mm (3.3 in)
1967	47.7 mm (1.9 in)
1968	93.4 mm (3.7 in)
1969	51.2 mm (2.0 in)
1970	46.4 mm (1.8 in)
1971	60.5 mm (2.4 in)
1972	82.5 mm (3.2 in)
1973	41.3 mm (1.6 in)
1974	64.1 mm (2.5 in)
1975	52.1 mm (2.1 in)
1976	47.3 mm (1.9 in)
1977	51.9 mm (2.0 in)
1978	110.8 mm (4.4 in)
1979	67.4 mm (2.7 in)
1980	39.5 mm (1.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Bad-Ostinghausen Sassendorf, 1950 to 1980. The record is 41 days in 1959, marked on the chart; the median year is 20 days.

Longest dry spell (CDD) at Bad-Ostinghausen Sassendorf by year
Year	Longest dry spell (CDD)
1950	13 days
1951	36 days
1952	17 days
1953	24 days
1954	21 days
1955	12 days
1956	16 days
1957	16 days
1958	15 days
1959	41 days
1960	15 days
1961	16 days
1962	21 days
1963	24 days
1964	20 days
1965	14 days
1966	19 days
1967	12 days
1968	27 days
1969	24 days
1970	14 days
1971	20 days
1972	21 days
1973	21 days
1974	21 days
1975	21 days
1976	22 days
1977	15 days
1978	22 days
1979	14 days
1980	28 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

30 years with a frost

Across 30 years with a frost, the median last spring frost at Bad-Ostinghausen Sassendorf falls on 28 April and the median first autumn frost on 14 October, which leaves a median of 172 days between them.

Fitted over all years, the growing season changes by +1.0 days per decade at this station.

Frost dates and growing season at Bad-Ostinghausen Sassendorf
Measure	Median, all years	Earliest period	Recent period (1950 to 1979)	Recent against earliest	Fitted trend
Last spring frost	28 April	n/a	28 April	n/a	-4.7 days per decade
First autumn frost	14 October	n/a	14 October	n/a	-3.7 days per decade
Growing days	172 days	n/a	172 days	n/a	+1.0 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

30 years, 1950 to 1979

A day with at least 30.3 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 71.9 mm (2.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Bad-Ostinghausen Sassendorf: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	30.3 mm (1.2 in)
5 years	40.2 mm (1.6 in)
10 years	47.2 mm (1.9 in)
25 years	56.7 mm (2.2 in)
50 years	64.1 mm (2.5 in)	Longer than the 30 years of record
100 years	71.9 mm (2.8 in)	Longer than the 30 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, 30 years of values from 1950 to 1979.

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: 69.5 mm (2.7 in) in 1978; 47.4 mm (1.9 in) in 1966; 45.4 mm (1.8 in) in 1958.

Download the Data

Data for Bad-Ostinghausen Sassendorf standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Bad-Ostinghausen Sassendorf 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.

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