Bonn-Roleber Weather Records (GME00130990)

Record envelope, standing records and threshold days for Bonn-Roleber (GME00130990), Germany, with 37 years of record.

Key Facts for Bonn-Roleber

Bonn-Roleber (GME00130990) is a weather station in Germany at 50.74 latitude and 7.19 longitude, 159 m (522 ft) above sea level.
The station reports from 1990 to 2026, 37 years of record.
1,464 records set at Bonn-Roleber still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Bonn-Roleber set a daily record precipitation of 20.7 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, 50.74 latitude, 7.19 longitude.
Elevation: 159 m (522 ft).
Period of record: 1990 to 2026, 37 years.
Eligible elements: prcp.

Daily Record Envelope and 2026

18 days at or beyond a record

The band shows the record high and record low for each calendar day at Bonn-Roleber. The lines show the 2026 daily maximum and minimum. 18 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Bonn-Roleber, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	15.6 C (60.1 F)	-16.4 C (2.5 F)	11.6 C (52.9 F)	-9.2 C (15.4 F)
Feb	20.7 C (69.3 F)	-15.4 C (4.3 F)	19.7 C (67.5 F)	-4.0 C (24.8 F)
Mar	25.2 C (77.4 F)	-11.9 C (10.6 F)	18.9 C (66.0 F)	0.4 C (32.7 F)
Apr	28.3 C (82.9 F)	-5.0 C (23.0 F)	21.2 C (70.2 F)	0.7 C (33.3 F)
May	32.9 C (91.2 F)	-1.5 C (29.3 F)	30.4 C (86.7 F)	3.6 C (38.5 F)
Jun	38.2 C (100.8 F)	4.2 C (39.6 F)	38.2 C (100.8 F)	7.4 C (45.3 F)
Jul	40.9 C (105.6 F)	6.6 C (43.9 F)	37.0 C (98.6 F)	9.5 C (49.1 F)
Aug	37.4 C (99.3 F)	5.0 C (41.0 F)	36.2 C (97.2 F)	7.9 C (46.2 F)
Sep	33.0 C (91.4 F)	1.3 C (34.3 F)	n/a	n/a
Oct	26.7 C (80.1 F)	-5.7 C (21.7 F)	n/a	n/a
Nov	20.5 C (68.9 F)	-7.1 C (19.2 F)	n/a	n/a
Dec	17.4 C (63.3 F)	-15.5 C (4.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Bonn-Roleber still stand. 2010 holds the most, with 99.

Standing records at Bonn-Roleber by the year they were set
Year set	Standing records
2000	34
2001	57
2002	41
2003	67
2004	45
2005	63
2006	67
2007	60
2008	48
2009	38
2010	99
2011	55
2012	65
2013	84
2014	36
2015	71
2016	58
2017	42
2018	77
2019	49
2020	41
2021	49
2022	47
2023	48
2024	51
2025	34
2026	38

Wettest Day of Each Month

Jun: 87.9 mm (3.5 in)

The wettest day on record for each calendar month at Bonn-Roleber. The most was 87.9 mm (3.5 in) on 20 June 1992.

Record daily precipitation for each month at Bonn-Roleber
Month	Record daily precipitation (mm)	Date
Jan	33.4 mm (1.3 in)	28 January 2021
Feb	29.2 mm (1.1 in)	11 February 2011
Mar	30.2 mm (1.2 in)	5 March 2009
Apr	35.5 mm (1.4 in)	16 April 2009
May	40.7 mm (1.6 in)	7 May 2004
Jun	87.9 mm (3.5 in)	20 June 1992
Jul	71.2 mm (2.8 in)	14 July 2021
Aug	62.6 mm (2.5 in)	21 August 1996
Sep	40.3 mm (1.6 in)	30 September 1990
Oct	31.6 mm (1.2 in)	29 October 2007
Nov	38.9 mm (1.5 in)	18 November 2004
Dec	31.8 mm (1.3 in)	21 December 1991

Period of Record Coverage

2000 to 2026

27 years of record at Bonn-Roleber, 2000 to 2026. 4 years have data for under 90 percent of days and are left out of rankings: 2000, 2001, 2005, 2026.

Days with data per year at Bonn-Roleber
Year	Days with data	Share of year	Complete
2000	175	48%	No
2001	327	90%	No
2002	353	97%	Yes
2003	353	97%	Yes
2004	358	98%	Yes
2005	321	88%	No
2006	363	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 Bonn-Roleber
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
19 August 2026	Bonn-Roleber, DE	daily rain (Provisional)	20.7 mm (0.8 in)	4.1 mm (0.16 in)	24 years	15 of 100 (Routine)
10 May 2026	Bonn-Roleber, DE	daily rain	15.4 mm (0.6 in)	0.4 mm (0.02 in)	27 years	11 of 100 (Routine)
5 May 2026	Bonn-Roleber, DE	daily rain	19.9 mm (0.8 in)	9.0 mm (0.35 in)	16 years	20 of 100 (Routine)
18 April 2026	Bonn-Roleber, DE	daily rain	21.6 mm (0.9 in)	12.3 mm (0.5 in)	31 years	20 of 100 (Routine)
11 April 2026	Bonn-Roleber, DE	daily rain	9.4 mm (0.37 in)	0.9 mm (0.04 in)	4 years	6 of 100 (Routine)
28 March 2026	Bonn-Roleber, DE	daily rain	10.4 mm (0.4 in)	3.1 mm (0.12 in)	8 years	12 of 100 (Routine)
13 March 2026	Bonn-Roleber, DE	daily rain	20.2 mm (0.8 in)	8.1 mm (0.32 in)	24 years	20 of 100 (Routine)
9 September 2025	Bonn-Roleber, DE	daily rain	31.0 mm (1.2 in)	21.7 mm (0.9 in)	0 years	38 of 100 (Notable)
27 July 2025	Bonn-Roleber, DE	daily rain	17.4 mm (0.7 in)	2.9 mm (0.11 in)	12 years	9 of 100 (Routine)
6 July 2025	Bonn-Roleber, DE	daily rain	11.3 mm (0.4 in)	1.1 mm (0.04 in)	32 years	13 of 100 (Routine)
24 May 2025	Bonn-Roleber, DE	daily rain	11.1 mm (0.4 in)	2.3 mm (0.09 in)	0 years	6 of 100 (Routine)
3 May 2025	Bonn-Roleber, DE	daily rain	18.5 mm (0.7 in)	2.1 mm (0.08 in)	20 years	12 of 100 (Routine)
30 January 2025	Bonn-Roleber, DE	daily rain	8.3 mm (0.33 in)	1.7 mm (0.07 in)	6 years	8 of 100 (Routine)
9 January 2025	Bonn-Roleber, DE	daily rain	12.7 mm (0.5 in)	3.3 mm (0.13 in)	5 years	12 of 100 (Routine)
8 January 2025	Bonn-Roleber, DE	daily rain	12.2 mm (0.5 in)	0.4 mm (0.02 in)	10 years	7 of 100 (Routine)
1 January 2025	Bonn-Roleber, DE	daily rain	13.4 mm (0.5 in)	5.0 mm (0.20 in)	13 years	18 of 100 (Routine)
5 December 2024	Bonn-Roleber, DE	daily rain	15.3 mm (0.6 in)	5.7 mm (0.22 in)	16 years	20 of 100 (Routine)
19 November 2024	Bonn-Roleber, DE	daily rain	11.5 mm (0.5 in)	0.9 mm (0.04 in)	9 years	6 of 100 (Routine)
10 September 2024	Bonn-Roleber, DE	daily rain	5.5 mm (0.22 in)	0.4 mm (0.02 in)	30 years	12 of 100 (Routine)
9 September 2024	Bonn-Roleber, DE	daily rain	9.3 mm (0.37 in)	5.2 mm (0.20 in)	31 years	20 of 100 (Routine)

Climate Trend

23 complete years, 2002 to 2025

One stripe for each of 23 complete years at Bonn-Roleber, 2002 to 2025. Blue stripes are years cooler than the station's own mean of 10.9 C (51.7 F); red stripes are warmer. The coolest year was 2010, at 9.1 C (48.3 F), and the warmest was 2024, at 12.0 C (53.5 F). The strongest colour marks a difference of 1.9 C (3.4 F).

Annual mean temperature at Bonn-Roleber as warming stripes, 2002 to 2025
Year	Annual mean temperature	Difference from the station mean
2002	10.8 C	-0.11 C
2003	10.8 C	-0.19 C
2004	10.1 C	-0.89 C
2006	10.8 C	-0.18 C
2007	11.1 C	+0.10 C
2008	10.5 C	-0.49 C
2009	10.4 C	-0.51 C
2010	9.1 C	-1.87 C
2011	11.1 C	+0.13 C
2012	10.4 C	-0.54 C
2013	9.8 C	-1.13 C
2014	11.7 C	+0.75 C
2015	11.1 C	+0.17 C
2016	10.8 C	-0.12 C
2017	11.0 C	+0.05 C
2018	11.6 C	+0.66 C
2019	11.4 C	+0.41 C
2020	11.6 C	+0.69 C
2021	10.4 C	-0.52 C
2022	11.9 C	+0.93 C
2023	12.0 C	+1.00 C
2024	12.0 C	+1.02 C
2025	11.5 C	+0.57 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1990 to 2026

Yearly extremes at Bonn-Roleber: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.9 C (105.6 F)	2019	34.8 C (94.6 F)	27
Coldest night (TNn)	-16.4 C (2.5 F)	2009	-9.1 C (15.6 F)	27
Wettest day (Rx1day)	87.9 mm (3.5 in)	1992	36.3 mm (1.4 in)	37
Wettest five days (Rx5day)	131.4 mm (5.2 in)	2011	61.0 mm (2.4 in)	37
Longest dry spell (CDD)	44 days	2011	20 days	37

Hottest day (TXx)

The hottest day of the year at Bonn-Roleber, 1990 to 2026. The record is 40.9 C (105.6 F) in 2019, marked on the chart; the median year is 34.8 C (94.6 F).

Hottest day (TXx) at Bonn-Roleber by year
Year	Hottest day (TXx)
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	30.6 C (87.1 F)
2001	34.0 C (93.2 F)
2002	34.4 C (93.9 F)
2003	37.4 C (99.3 F)
2004	31.4 C (88.5 F)
2005	32.9 C (91.2 F)
2006	34.7 C (94.5 F)
2007	34.5 C (94.1 F)
2008	32.7 C (90.9 F)
2009	35.1 C (95.2 F)
2010	35.4 C (95.7 F)
2011	31.4 C (88.5 F)
2012	36.2 C (97.2 F)
2013	34.8 C (94.6 F)
2014	32.8 C (91.0 F)
2015	35.0 C (95.0 F)
2016	34.1 C (93.4 F)
2017	35.7 C (96.3 F)
2018	36.9 C (98.4 F)
2019	40.9 C (105.6 F)
2020	36.3 C (97.3 F)
2021	33.0 C (91.4 F)
2022	36.4 C (97.5 F)
2023	34.5 C (94.1 F)
2024	35.0 C (95.0 F)
2025	37.2 C (99.0 F)
2026	38.2 C (100.8 F)

Coldest night (TNn)

The coldest night of the year at Bonn-Roleber, 1990 to 2026. The record is -16.4 C (2.5 F) in 2009, marked on the chart; the median year is -9.1 C (15.6 F).

Coldest night (TNn) at Bonn-Roleber by year
Year	Coldest night (TNn)
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	-4.8 C (23.4 F)
2001	-7.1 C (19.2 F)
2002	-9.1 C (15.6 F)
2003	-12.6 C (9.3 F)
2004	-8.1 C (17.4 F)
2005	-12.3 C (9.9 F)
2006	-10.0 C (14.0 F)
2007	-6.9 C (19.6 F)
2008	-7.0 C (19.4 F)
2009	-16.4 C (2.5 F)
2010	-12.7 C (9.1 F)
2011	-7.4 C (18.7 F)
2012	-15.4 C (4.3 F)
2013	-11.9 C (10.6 F)
2014	-6.4 C (20.5 F)
2015	-5.8 C (21.6 F)
2016	-7.9 C (17.8 F)
2017	-9.1 C (15.6 F)
2018	-10.1 C (13.8 F)
2019	-9.1 C (15.6 F)
2020	-6.0 C (21.2 F)
2021	-10.9 C (12.4 F)
2022	-11.6 C (11.1 F)
2023	-6.1 C (21.0 F)
2024	-8.1 C (17.4 F)
2025	-7.5 C (18.5 F)
2026	-9.2 C (15.4 F)

Wettest day (Rx1day)

The wettest day of the year at Bonn-Roleber, 1990 to 2026. The record is 87.9 mm (3.5 in) in 1992, marked on the chart; the median year is 36.3 mm (1.4 in).

Wettest day (Rx1day) at Bonn-Roleber by year
Year	Wettest day (Rx1day)
1990	45.5 mm (1.8 in)
1991	39.0 mm (1.5 in)
1992	87.9 mm (3.5 in)
1993	31.2 mm (1.2 in)
1994	27.3 mm (1.1 in)
1995	38.0 mm (1.5 in)
1996	62.6 mm (2.5 in)
1997	31.9 mm (1.3 in)
1998	33.6 mm (1.3 in)
1999	22.0 mm (0.9 in)
2000	35.1 mm (1.4 in)
2001	32.5 mm (1.3 in)
2002	36.3 mm (1.4 in)
2003	30.8 mm (1.2 in)
2004	43.3 mm (1.7 in)
2005	34.7 mm (1.4 in)
2006	22.3 mm (0.9 in)
2007	57.4 mm (2.3 in)
2008	42.8 mm (1.7 in)
2009	35.5 mm (1.4 in)
2010	38.3 mm (1.5 in)
2011	68.0 mm (2.7 in)
2012	31.0 mm (1.2 in)
2013	53.8 mm (2.1 in)
2014	42.0 mm (1.7 in)
2015	27.0 mm (1.1 in)
2016	47.1 mm (1.9 in)
2017	23.7 mm (0.9 in)
2018	36.5 mm (1.4 in)
2019	21.7 mm (0.9 in)
2020	44.2 mm (1.7 in)
2021	71.2 mm (2.8 in)
2022	18.9 mm (0.7 in)
2023	30.1 mm (1.2 in)
2024	37.9 mm (1.5 in)
2025	31.0 mm (1.2 in)
2026	44.7 mm (1.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Bonn-Roleber, 1990 to 2026. The record is 131.4 mm (5.2 in) in 2011, marked on the chart; the median year is 61.0 mm (2.4 in).

Wettest five days (Rx5day) at Bonn-Roleber by year
Year	Wettest five days (Rx5day)
1990	96.9 mm (3.8 in)
1991	67.9 mm (2.7 in)
1992	119.0 mm (4.7 in)
1993	62.8 mm (2.5 in)
1994	41.8 mm (1.6 in)
1995	43.0 mm (1.7 in)
1996	64.3 mm (2.5 in)
1997	53.3 mm (2.1 in)
1998	66.5 mm (2.6 in)
1999	40.9 mm (1.6 in)
2000	61.3 mm (2.4 in)
2001	51.5 mm (2.0 in)
2002	52.4 mm (2.1 in)
2003	59.3 mm (2.3 in)
2004	72.6 mm (2.9 in)
2005	69.7 mm (2.7 in)
2006	60.0 mm (2.4 in)
2007	75.9 mm (3.0 in)
2008	61.0 mm (2.4 in)
2009	66.5 mm (2.6 in)
2010	55.1 mm (2.2 in)
2011	131.4 mm (5.2 in)
2012	48.4 mm (1.9 in)
2013	57.9 mm (2.3 in)
2014	95.1 mm (3.7 in)
2015	48.9 mm (1.9 in)
2016	78.6 mm (3.1 in)
2017	53.1 mm (2.1 in)
2018	54.8 mm (2.2 in)
2019	38.5 mm (1.5 in)
2020	57.3 mm (2.3 in)
2021	101.5 mm (4.0 in)
2022	41.3 mm (1.6 in)
2023	62.6 mm (2.5 in)
2024	75.8 mm (3.0 in)
2025	48.5 mm (1.9 in)
2026	75.1 mm (3.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Bonn-Roleber, 1990 to 2026. The record is 44 days in 2011, marked on the chart; the median year is 20 days.

Longest dry spell (CDD) at Bonn-Roleber by year
Year	Longest dry spell (CDD)
1990	24 days
1991	28 days
1992	14 days
1993	19 days
1994	16 days
1995	19 days
1996	15 days
1997	20 days
1998	20 days
1999	19 days
2000	13 days
2001	14 days
2002	22 days
2003	22 days
2004	20 days
2005	21 days
2006	13 days
2007	38 days
2008	13 days
2009	15 days
2010	26 days
2011	44 days
2012	17 days
2013	21 days
2014	21 days
2015	20 days
2016	18 days
2017	28 days
2018	17 days
2019	20 days
2020	38 days
2021	14 days
2022	16 days
2023	33 days
2024	22 days
2025	23 days
2026	15 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

23 years with a frost

Across 23 years with a frost, the median last spring frost at Bonn-Roleber falls on 12 April and the median first autumn frost on 8 November, which leaves a median of 211 days between them.

Frost dates and growing season at Bonn-Roleber
Measure	Median, all years	Earliest period	Recent period (2002 to 2025)	Recent against earliest	Fitted trend
Last spring frost	12 April	n/a	12 April	n/a	n/a
First autumn frost	8 November	n/a	8 November	n/a	n/a
Growing days	211 days	n/a	211 days	n/a	n/a

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

34 years, 1990 to 2025

A day with at least 35.9 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 97.3 mm (3.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Bonn-Roleber: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	35.9 mm (1.4 in)
5 years	49.2 mm (1.9 in)
10 years	59.1 mm (2.3 in)
25 years	73.1 mm (2.9 in)
50 years	84.7 mm (3.3 in)	Longer than the 34 years of record
100 years	97.3 mm (3.8 in)	Longer than the 34 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, 34 years of values from 1990 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: 87.9 mm (3.5 in) in 1992; 71.2 mm (2.8 in) in 2021; 68.0 mm (2.7 in) in 2011.

Download the Data

Data for Bonn-Roleber standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Bonn-Roleber 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).