Ummendorf Weather Records (GME00129598)

Record envelope, standing records and threshold days for Ummendorf (GME00129598), Germany, with 40 years of record.

Key Facts for Ummendorf

Ummendorf (GME00129598) is a weather station in Germany at 52.16 latitude and 11.18 longitude, 162 m (531 ft) above sea level.
The station reports from 1987 to 2026, 40 years of record.
1,464 records set at Ummendorf still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Ummendorf set a daily record precipitation of 20.2 mm (0.8 in) on 19 August 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

Location: Germany, 52.16 latitude, 11.18 longitude.
Elevation: 162 m (531 ft).
Period of record: 1987 to 2026, 40 years.
Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

15 days at or beyond a record

The band shows the record high and record low for each calendar day at Ummendorf. The lines show the 2026 daily maximum and minimum. 15 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Ummendorf, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	15.3 C (59.5 F)	-18.4 C (-1.1 F)	10.8 C (51.4 F)	-13.6 C (7.5 F)
Feb	19.1 C (66.4 F)	-18.7 C (-1.7 F)	19.1 C (66.4 F)	-8.3 C (17.1 F)
Mar	23.7 C (74.7 F)	-12.8 C (9.0 F)	17.0 C (62.6 F)	-0.8 C (30.6 F)
Apr	27.6 C (81.7 F)	-6.4 C (20.5 F)	20.4 C (68.7 F)	-0.2 C (31.6 F)
May	31.3 C (88.3 F)	-0.4 C (31.3 F)	27.5 C (81.5 F)	2.6 C (36.7 F)
Jun	38.4 C (101.1 F)	2.6 C (36.7 F)	38.4 C (101.1 F)	7.1 C (44.8 F)
Jul	37.7 C (99.9 F)	6.7 C (44.1 F)	37.5 C (99.5 F)	8.7 C (47.7 F)
Aug	38.0 C (100.4 F)	5.5 C (41.9 F)	33.9 C (93.0 F)	9.2 C (48.6 F)
Sep	32.6 C (90.7 F)	1.8 C (35.2 F)	n/a	n/a
Oct	26.4 C (79.5 F)	-5.3 C (22.5 F)	n/a	n/a
Nov	19.4 C (66.9 F)	-11.4 C (11.5 F)	n/a	n/a
Dec	16.8 C (62.2 F)	-17.1 C (1.2 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Ummendorf still stand. 2010 holds the most, with 78.

Standing records at Ummendorf by the year they were set
Year set	Standing records
1987	5
1988	18
1989	32
1990	34
1991	37
1992	22
1993	67
1994	39
1995	33
1996	45
1997	30
1998	24
1999	20
2000	28
2001	30
2002	42
2003	49
2004	23
2005	39
2006	57
2007	33
2008	17
2009	26
2010	78
2011	33
2012	49
2013	76
2014	26
2015	54
2016	39
2017	22
2018	61
2019	33
2020	35
2021	39
2022	40
2023	27
2024	48
2025	29
2026	25

All-Time Record Progression

6 new records

6 all-time records were set at Ummendorf between 14 February 2021 and 28 June 2026. Each dot is a new record.

When Ummendorf set new all-time records
Date	Kind	Detail
2021-02-14	Record low minimum temperature	Record low minimum temperature -18.7 C (-1.7 F)
2022-07-20	Record high maximum temperature	Record high maximum temperature 37.7 C (99.9 F)
2022-08-04	Record high maximum temperature	Record high maximum temperature 38.0 C (100.4 F)
2026-06-27	Record high maximum temperature	Record high maximum temperature 38.4 C (101.1 F)
2026-06-27	Record high minimum temperature	Record high minimum temperature 22.5 C (72.5 F)
2026-06-28	Record high minimum temperature	Record high minimum temperature 23.5 C (74.3 F)

Wettest Day of Each Month

Jun: 70.8 mm (2.8 in)

The wettest day on record for each calendar month at Ummendorf. The most was 70.8 mm (2.8 in) on 27 June 1998.

Record daily precipitation for each month at Ummendorf
Month	Record daily precipitation (mm)	Date
Jan	16.0 mm (0.6 in)	2 January 2024
Feb	19.0 mm (0.7 in)	22 February 2017
Mar	16.6 mm (0.7 in)	13 March 1992
Apr	23.8 mm (0.9 in)	18 April 2025
May	39.5 mm (1.6 in)	30 May 1999
Jun	70.8 mm (2.8 in)	27 June 1998
Jul	51.2 mm (2.0 in)	17 July 2002
Aug	57.0 mm (2.2 in)	15 August 2022
Sep	37.5 mm (1.5 in)	10 September 2003
Oct	23.9 mm (0.9 in)	22 October 2005
Nov	20.9 mm (0.8 in)	4 November 2021
Dec	19.2 mm (0.8 in)	16 December 2011

Period of Record Coverage

1987 to 2026

40 years of record at Ummendorf, 1987 to 2026. 6 years have data for under 90 percent of days and are left out of rankings: 1987, 1994, 1997, 1998, 2000, 2026.

Days with data per year at Ummendorf
Year	Days with data	Share of year	Complete
1987	31	8%	No
1988	366	100%	Yes
1989	365	100%	Yes
1990	365	100%	Yes
1991	364	100%	Yes
1992	336	92%	Yes
1993	333	91%	Yes
1994	284	78%	No
1995	339	93%	Yes
1996	336	92%	Yes
1997	305	84%	No
1998	241	66%	No
1999	336	92%	Yes
2000	302	83%	No
2001	343	94%	Yes
2002	355	97%	Yes
2003	358	98%	Yes
2004	364	99%	Yes
2005	344	94%	Yes
2006	362	99%	Yes
2007	365	100%	Yes
2008	366	100%	Yes
2009	365	100%	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	366	100%	Yes
2025	365	100%	Yes
2026	243	67%	No

Latest Records

Latest records at Ummendorf
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
19 August 2026	Ummendorf, DE	daily rain (Provisional)	20.2 mm (0.8 in)	13.2 mm (0.5 in)	12 years	20 of 100 (Routine)
5 August 2026	Ummendorf, DE	daily high min	19.5 C (67.1 F)	0.6 C (1.1 F)	36 years	16 of 100 (Routine)
30 July 2026	Ummendorf, DE	daily high max	37.5 C (99.5 F)	4.2 C (7.6 F)	8 years	15 of 100 (Routine)
30 July 2026	Ummendorf, DE	daily high min (Tie)	18.9 C (66.0 F)	tie	24 years	2 of 100 (Routine)
29 July 2026	Ummendorf, DE	daily high max	32.2 C (90.0 F)	0.2 C (0.4 F)	17 years	9 of 100 (Routine)
25 July 2026	Ummendorf, DE	daily low min	10.1 C (50.2 F)	0.2 C (0.4 F)	24 years	11 of 100 (Routine)
30 June 2026	Ummendorf, DE	daily rain	17.0 mm (0.7 in)	1.4 mm (0.06 in)	27 years	12 of 100 (Routine)
28 June 2026	Ummendorf, DE	all-time high min	23.5 C (74.3 F)	1.0 C (1.8 F)	0 years	27 of 100 (Routine)
28 June 2026	Ummendorf, DE	daily high max	34.2 C (93.6 F)	3.5 C (6.3 F)	4 years	13 of 100 (Routine)
27 June 2026	Ummendorf, DE	all-time high min	22.5 C (72.5 F)	1.2 C (2.2 F)	15 years	32 of 100 (Routine)
27 June 2026	Ummendorf, DE	all-time high max	38.4 C (101.1 F)	0.4 C (0.7 F)	3 years	25 of 100 (Routine)
26 June 2026	Ummendorf, DE	daily high min	17.4 C (63.3 F)	0.8 C (1.4 F)	32 years	15 of 100 (Routine)
26 June 2026	Ummendorf, DE	daily high max	33.2 C (91.8 F)	0.6 C (1.1 F)	7 years	7 of 100 (Routine)
25 June 2026	Ummendorf, DE	monthly high min	19.8 C (67.6 F)	0.4 C (0.7 F)	26 years	22 of 100 (Routine)
25 June 2026	Ummendorf, DE	daily high max	31.9 C (89.4 F)	0.1 C (0.2 F)	7 years	6 of 100 (Routine)
22 June 2026	Ummendorf, DE	daily high min	17.1 C (62.8 F)	0.6 C (1.1 F)	3 years	6 of 100 (Routine)
19 June 2026	Ummendorf, DE	monthly high min (Tie)	19.4 C (66.9 F)	tie	25 years	5 of 100 (Routine)
19 June 2026	Ummendorf, DE	daily high max (Tie)	31.8 C (89.2 F)	tie	4 years	1 of 100 (Routine)
2 June 2026	Ummendorf, DE	daily rain	30.4 mm (1.2 in)	2.3 mm (0.09 in)	27 years	13 of 100 (Routine)
24 May 2026	Ummendorf, DE	daily high min	14.7 C (58.5 F)	1.5 C (2.7 F)	1 year	8 of 100 (Routine)

Climate Trend

34 complete years, 1988 to 2025

One stripe for each of 34 complete years at Ummendorf, 1988 to 2025. Blue stripes are years cooler than the station's own mean of 9.7 C (49.4 F); red stripes are warmer. The coolest year was 1996, at 7.3 C (45.1 F), and the warmest was 2024, at 11.3 C (52.3 F). The strongest colour marks a difference of 2.4 C (4.3 F).

Annual mean temperature at Ummendorf as warming stripes, 1988 to 2025
Year	Annual mean temperature	Difference from the station mean
1988	9.5 C	-0.21 C
1989	10.1 C	+0.48 C
1990	10.0 C	+0.37 C
1991	8.9 C	-0.79 C
1992	9.8 C	+0.10 C
1993	8.6 C	-1.11 C
1995	9.4 C	-0.25 C
1996	7.3 C	-2.37 C
2000	10.3 C	+0.66 C
2001	9.1 C	-0.53 C
2002	9.3 C	-0.35 C
2003	9.4 C	-0.30 C
2004	9.1 C	-0.59 C
2005	9.3 C	-0.39 C
2006	9.7 C	+0.06 C
2007	10.1 C	+0.41 C
2008	9.7 C	+0.03 C
2009	9.3 C	-0.36 C
2010	7.5 C	-2.17 C
2011	9.8 C	+0.09 C
2012	9.2 C	-0.51 C
2013	8.8 C	-0.91 C
2014	10.4 C	+0.75 C
2015	10.0 C	+0.35 C
2016	10.0 C	+0.33 C
2017	9.8 C	+0.14 C
2018	10.6 C	+0.93 C
2019	10.6 C	+0.91 C
2020	10.6 C	+0.97 C
2021	9.4 C	-0.22 C
2022	10.7 C	+1.08 C
2023	10.7 C	+1.04 C
2024	11.3 C	+1.60 C
2025	10.3 C	+0.59 C

The annual mean temperature here has risen by 0.4 C (0.1 to 0.6) per decade over 1988 to 2025. In Fahrenheit: 0.6 F (0.2 to 1.1) per decade. The slope is a straight line fitted to 34 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Ummendorf
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.4 C (0.1 to 0.6) per decade	0.6 F (0.2 to 1.1) per decade	1988 to 2025	34	Rise
Mean daily maximum	0.5 C (0.2 to 0.8) per decade	0.9 F (0.4 to 1.4) per decade	1988 to 2025	34	Rise
Mean daily minimum	0.23 C (0.01 to 0.45) per decade	0.41 F (0.01 to 0.81) per decade	1988 to 2025	34	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

1987 to 2026

Yearly extremes at Ummendorf: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.4 C (101.1 F)	2026	34.1 C (93.3 F)	40
Coldest night (TNn)	-18.7 C (-1.7 F)	2021	-12.3 C (9.8 F)	40
Wettest day (Rx1day)	70.8 mm (2.8 in)	1998	31.2 mm (1.2 in)	39
Wettest five days (Rx5day)	124.8 mm (4.9 in)	1998	50.3 mm (2.0 in)	39
Longest dry spell (CDD)	52 days	2011	20 days	39

Hottest day (TXx)

The hottest day of the year at Ummendorf, 1987 to 2026. The record is 38.4 C (101.1 F) in 2026, marked on the chart; the median year is 34.1 C (93.3 F).

Hottest day (TXx) at Ummendorf by year
Year	Hottest day (TXx)
1987	13.5 C (56.3 F)
1988	29.6 C (85.3 F)
1989	32.8 C (91.0 F)
1990	34.6 C (94.3 F)
1991	33.4 C (92.1 F)
1992	37.3 C (99.1 F)
1993	29.3 C (84.7 F)
1994	35.5 C (95.9 F)
1995	33.8 C (92.8 F)
1996	30.8 C (87.4 F)
1997	32.5 C (90.5 F)
1998	29.8 C (85.6 F)
1999	33.4 C (92.1 F)
2000	33.4 C (92.1 F)
2001	34.8 C (94.6 F)
2002	32.6 C (90.7 F)
2003	35.5 C (95.9 F)
2004	30.8 C (87.4 F)
2005	32.8 C (91.0 F)
2006	36.1 C (97.0 F)
2007	37.2 C (99.0 F)
2008	32.6 C (90.7 F)
2009	34.3 C (93.7 F)
2010	35.1 C (95.2 F)
2011	30.1 C (86.2 F)
2012	35.4 C (95.7 F)
2013	35.7 C (96.3 F)
2014	34.6 C (94.3 F)
2015	37.0 C (98.6 F)
2016	35.5 C (95.9 F)
2017	31.8 C (89.2 F)
2018	36.6 C (97.9 F)
2019	35.6 C (96.1 F)
2020	34.6 C (94.3 F)
2021	33.5 C (92.3 F)
2022	38.0 C (100.4 F)
2023	32.4 C (90.3 F)
2024	33.0 C (91.4 F)
2025	36.8 C (98.2 F)
2026	38.4 C (101.1 F)

Coldest night (TNn)

The coldest night of the year at Ummendorf, 1987 to 2026. The record is -18.7 C (-1.7 F) in 2021, marked on the chart; the median year is -12.3 C (9.8 F).

Coldest night (TNn) at Ummendorf by year
Year	Coldest night (TNn)
1987	-7.9 C (17.8 F)
1988	-8.2 C (17.2 F)
1989	-7.6 C (18.3 F)
1990	-6.1 C (21.0 F)
1991	-14.8 C (5.4 F)
1992	-8.4 C (16.9 F)
1993	-14.3 C (6.3 F)
1994	-14.6 C (5.7 F)
1995	-12.8 C (9.0 F)
1996	-17.1 C (1.2 F)
1997	-17.6 C (0.3 F)
1998	-10.9 C (12.4 F)
1999	-11.6 C (11.1 F)
2000	-8.9 C (16.0 F)
2001	-12.2 C (10.0 F)
2002	-12.5 C (9.5 F)
2003	-16.1 C (3.0 F)
2004	-11.0 C (12.2 F)
2005	-13.9 C (7.0 F)
2006	-14.7 C (5.5 F)
2007	-8.3 C (17.1 F)
2008	-9.3 C (15.3 F)
2009	-18.4 C (-1.1 F)
2010	-17.6 C (0.3 F)
2011	-11.3 C (11.7 F)
2012	-18.5 C (-1.3 F)
2013	-14.4 C (6.1 F)
2014	-13.3 C (8.1 F)
2015	-9.0 C (15.8 F)
2016	-15.1 C (4.8 F)
2017	-9.8 C (14.4 F)
2018	-13.3 C (8.1 F)
2019	-9.8 C (14.4 F)
2020	-4.8 C (23.4 F)
2021	-18.7 C (-1.7 F)
2022	-10.7 C (12.7 F)
2023	-7.0 C (19.4 F)
2024	-10.3 C (13.5 F)
2025	-13.4 C (7.9 F)
2026	-13.6 C (7.5 F)

Wettest day (Rx1day)

The wettest day of the year at Ummendorf, 1987 to 2026. The record is 70.8 mm (2.8 in) in 1998, marked on the chart; the median year is 31.2 mm (1.2 in).

Wettest day (Rx1day) at Ummendorf by year
Year	Wettest day (Rx1day)
1987	n/a
1988	69.9 mm (2.8 in)
1989	34.0 mm (1.3 in)
1990	21.1 mm (0.8 in)
1991	44.0 mm (1.7 in)
1992	18.2 mm (0.7 in)
1993	38.1 mm (1.5 in)
1994	18.1 mm (0.7 in)
1995	16.8 mm (0.7 in)
1996	22.3 mm (0.9 in)
1997	27.2 mm (1.1 in)
1998	70.8 mm (2.8 in)
1999	39.5 mm (1.6 in)
2000	21.6 mm (0.9 in)
2001	20.4 mm (0.8 in)
2002	51.2 mm (2.0 in)
2003	37.5 mm (1.5 in)
2004	18.2 mm (0.7 in)
2005	23.9 mm (0.9 in)
2006	42.9 mm (1.7 in)
2007	35.3 mm (1.4 in)
2008	41.8 mm (1.6 in)
2009	19.4 mm (0.8 in)
2010	33.7 mm (1.3 in)
2011	33.5 mm (1.3 in)
2012	26.5 mm (1.0 in)
2013	25.0 mm (1.0 in)
2014	31.2 mm (1.2 in)
2015	41.1 mm (1.6 in)
2016	24.0 mm (0.9 in)
2017	34.9 mm (1.4 in)
2018	28.6 mm (1.1 in)
2019	32.2 mm (1.3 in)
2020	58.0 mm (2.3 in)
2021	20.9 mm (0.8 in)
2022	57.0 mm (2.2 in)
2023	48.6 mm (1.9 in)
2024	23.3 mm (0.9 in)
2025	23.8 mm (0.9 in)
2026	30.4 mm (1.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Ummendorf, 1987 to 2026. The record is 124.8 mm (4.9 in) in 1998, marked on the chart; the median year is 50.3 mm (2.0 in).

Wettest five days (Rx5day) at Ummendorf by year
Year	Wettest five days (Rx5day)
1987	n/a
1988	97.6 mm (3.8 in)
1989	44.5 mm (1.8 in)
1990	48.0 mm (1.9 in)
1991	50.4 mm (2.0 in)
1992	32.1 mm (1.3 in)
1993	49.3 mm (1.9 in)
1994	44.8 mm (1.8 in)
1995	32.3 mm (1.3 in)
1996	30.6 mm (1.2 in)
1997	68.4 mm (2.7 in)
1998	124.8 mm (4.9 in)
1999	75.3 mm (3.0 in)
2000	39.3 mm (1.5 in)
2001	54.7 mm (2.2 in)
2002	79.0 mm (3.1 in)
2003	64.9 mm (2.6 in)
2004	44.3 mm (1.7 in)
2005	43.0 mm (1.7 in)
2006	43.1 mm (1.7 in)
2007	69.7 mm (2.7 in)
2008	52.8 mm (2.1 in)
2009	48.4 mm (1.9 in)
2010	63.0 mm (2.5 in)
2011	45.6 mm (1.8 in)
2012	50.3 mm (2.0 in)
2013	48.1 mm (1.9 in)
2014	50.0 mm (2.0 in)
2015	79.0 mm (3.1 in)
2016	51.1 mm (2.0 in)
2017	67.2 mm (2.6 in)
2018	37.8 mm (1.5 in)
2019	40.3 mm (1.6 in)
2020	60.4 mm (2.4 in)
2021	45.3 mm (1.8 in)
2022	70.5 mm (2.8 in)
2023	97.4 mm (3.8 in)
2024	52.1 mm (2.1 in)
2025	42.4 mm (1.7 in)
2026	51.3 mm (2.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Ummendorf, 1987 to 2026. The record is 52 days in 2011, marked on the chart; the median year is 20 days.

Longest dry spell (CDD) at Ummendorf by year
Year	Longest dry spell (CDD)
1987	n/a
1988	47 days
1989	32 days
1990	33 days
1991	31 days
1992	14 days
1993	14 days
1994	14 days
1995	22 days
1996	25 days
1997	16 days
1998	29 days
1999	13 days
2000	8 days
2001	17 days
2002	28 days
2003	19 days
2004	18 days
2005	19 days
2006	21 days
2007	19 days
2008	18 days
2009	24 days
2010	31 days
2011	52 days
2012	16 days
2013	21 days
2014	20 days
2015	19 days
2016	15 days
2017	16 days
2018	28 days
2019	15 days
2020	29 days
2021	18 days
2022	22 days
2023	28 days
2024	29 days
2025	32 days
2026	14 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

34 years with a frost

Across 34 years with a frost, the median last spring frost at Ummendorf falls on 17 April and the median first autumn frost on 2 November, which leaves a median of 199 days between them.

Fitted over all years, the growing season changes by +4.1 days per decade at this station.

Frost dates and growing season at Ummendorf
Measure	Median, all years	Earliest period	Recent period (1992 to 2025)	Recent against earliest	Fitted trend
Last spring frost	17 April	n/a	15 April	n/a	+0.3 days per decade
First autumn frost	2 November	n/a	3 November	n/a	+4.4 days per decade
Growing days	199 days	n/a	202 days	n/a	+4.1 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

31 years, 1988 to 2025

A day with at least 31.9 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 78.6 mm (3.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Ummendorf: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	31.9 mm (1.3 in)
5 years	43.6 mm (1.7 in)
10 years	51.7 mm (2.0 in)
25 years	62.3 mm (2.5 in)
50 years	70.4 mm (2.8 in)	Longer than the 31 years of record
100 years	78.6 mm (3.1 in)	Longer than the 31 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, 31 years of values from 1988 to 2025.

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: 69.9 mm (2.8 in) in 1988; 58.0 mm (2.3 in) in 2020; 57.0 mm (2.2 in) in 2022.

Download the Data

Data for Ummendorf standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ummendorf 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 2026-10-14. Last revised 14 October 2026 (2026-10-14).