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Built 2026-10-16 (16 October 2026)

Groningen-1 Weather Records (NLE00100499)

Record envelope, standing records and threshold days for Groningen-1 (NLE00100499), Netherlands, with 181 years of record.

Key Facts for Groningen-1

  • Groningen-1 (NLE00100499) is a weather station in Netherlands at 53.18 latitude and 6.60 longitude, 1 m (3 ft) above sea level.
  • The station reports from 1846 to 2026, 181 years of record.
  • 0 records set at Groningen-1 still stand.
  • Records are tracked for prcp, snwd: an element needs 30 years of data to be eligible.
  • Groningen-1 set a daily record precipitation of 45.5 mm (1.8 in) on 27 June 2026.

About the Station

  • Location: Netherlands, 53.18 latitude, 6.60 longitude.
  • Elevation: 1 m (3 ft).
  • Period of record: 1846 to 2026, 181 years.
  • Eligible elements: prcp, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Groningen-1, with 2026 drawn through them The band shows the record high and record low for each calendar day at Groningen-1. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 000111 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Groningen-1. 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 Groningen-1, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jann/an/an/an/a
Febn/an/an/an/a
Marn/an/an/an/a
Aprn/an/an/an/a
Mayn/an/an/an/a
Junn/an/an/an/a
Juln/an/an/an/a
Augn/an/an/an/a
Sepn/an/an/an/a
Octn/an/an/an/a
Novn/an/an/an/a
Decn/an/an/an/a

Which Years Hold Standing Records

0 standing records
Standing records at Groningen-1 by the year they were set 0 records at Groningen-1 still stand. 00000000000
0 records at Groningen-1 still stand.
Standing records at Groningen-1 by the year they were set
Year setStanding records

All-Time Record Progression

1 new records
When Groningen-1 set new all-time records 1 all-time records were set at Groningen-1 between 15 July 1932 and 15 July 1932. Each dot is a new record. Record daily precipitation15 July 1932: Record daily precipitation 75.6 mm (3.0 in)
1 all-time records were set at Groningen-1 between 15 July 1932 and 15 July 1932. Each dot is a new record.
When Groningen-1 set new all-time records
DateKindDetail
1932-07-15Record daily precipitationRecord daily precipitation 75.6 mm (3.0 in)

Wettest Day of Each Month

Jul: 75.6 mm (3.0 in)
Record daily precipitation for each month at Groningen-1 The wettest day on record for each calendar month at Groningen-1. The most was 75.6 mm (3.0 in) on 15 July 1932. 020406080 Jan: 41.0 mm (1.6 in), 8 January 1877 Jan Feb: 58.5 mm (2.3 in), 23 February 1873 Feb Mar: 36.0 mm (1.4 in), 2 March 2000 Mar Apr: 30.8 mm (1.2 in), 29 April 2018 Apr May: 55.6 mm (2.2 in), 21 May 1997 May Jun: 53.0 mm (2.1 in), 10 June 2024 Jun Jul: 75.6 mm (3.0 in), 15 July 1932 Jul Aug: 69.3 mm (2.7 in), 27 August 1996 Aug Sep: 55.1 mm (2.2 in), 15 September 1950 Sep Oct: 41.7 mm (1.6 in), 17 October 1961 Oct Nov: 40.0 mm (1.6 in), 10 November 2008 Nov Dec: 59.2 mm (2.3 in), 3 December 1960 Dec
The wettest day on record for each calendar month at Groningen-1. The most was 75.6 mm (3.0 in) on 15 July 1932.
Record daily precipitation for each month at Groningen-1
MonthRecord daily precipitation (mm)Date
Jan41.0 mm (1.6 in)8 January 1877
Feb58.5 mm (2.3 in)23 February 1873
Mar36.0 mm (1.4 in)2 March 2000
Apr30.8 mm (1.2 in)29 April 2018
May55.6 mm (2.2 in)21 May 1997
Jun53.0 mm (2.1 in)10 June 2024
Jul75.6 mm (3.0 in)15 July 1932
Aug69.3 mm (2.7 in)27 August 1996
Sep55.1 mm (2.2 in)15 September 1950
Oct41.7 mm (1.6 in)17 October 1961
Nov40.0 mm (1.6 in)10 November 2008
Dec59.2 mm (2.3 in)3 December 1960

Latest Records

20
Latest records at Groningen-1
DateStationRecordValueBeat old record byOld record stoodSignificance
27 June 2026Groningen-1, NLdaily rain45.5 mm (1.8 in)14.8 mm (0.6 in)44 years49 of 100 (Notable)
17 May 2026Groningen-1, NLdaily rain16.8 mm (0.7 in)0.2 mm (0.01 in)177 years20 of 100 (Routine)
14 November 2025Groningen-1, NLdaily rain30.1 mm (1.2 in)11.2 mm (0.4 in)10 years38 of 100 (Notable)
25 October 2025Groningen-1, NLdaily rain23.5 mm (0.9 in)4.3 mm (0.17 in)172 years20 of 100 (Routine)
9 September 2025Groningen-1, NLdaily rain24.6 mm (1.0 in)1.9 mm (0.07 in)161 years20 of 100 (Routine)
27 May 2025Groningen-1, NLdaily rain22.5 mm (0.9 in)2.3 mm (0.09 in)11 years17 of 100 (Routine)
15 April 2025Groningen-1, NLdaily rain17.4 mm (0.7 in)1.4 mm (0.06 in)0 years13 of 100 (Routine)
5 December 2024Groningen-1, NLdaily rain28.0 mm (1.1 in)10.3 mm (0.4 in)23 years40 of 100 (Notable)
27 November 2024Groningen-1, NLdaily rain28.0 mm (1.1 in)0.5 mm (0.02 in)145 years41 of 100 (Notable)
12 July 2024Groningen-1, NLdaily rain45.2 mm (1.8 in)11.1 mm (0.4 in)14 years31 of 100 (Routine)
10 June 2024Groningen-1, NLmonthly rain53.0 mm (2.1 in)2.0 mm (0.08 in)58 years40 of 100 (Notable)
15 April 2024Groningen-1, NLdaily rain16.0 mm (0.6 in)1.2 mm (0.05 in)52 years20 of 100 (Routine)
18 February 2024Groningen-1, NLdaily rain17.0 mm (0.7 in)7.7 mm (0.30 in)1 year20 of 100 (Routine)
2 January 2024Groningen-1, NLdaily rain27.7 mm (1.1 in)1.9 mm (0.07 in)40 years26 of 100 (Routine)
19 November 2023Groningen-1, NLdaily rain35.5 mm (1.4 in)18.4 mm (0.7 in)36 years60 of 100 (Major)
20 October 2023Groningen-1, NLdaily rain38.0 mm (1.5 in)19.6 mm (0.8 in)147 years80 of 100 (Exceptional)
6 May 2023Groningen-1, NLdaily rain28.3 mm (1.1 in)8.1 mm (0.32 in)72 years48 of 100 (Notable)
22 March 2023Groningen-1, NLdaily rain27.3 mm (1.1 in)11.1 mm (0.4 in)36 years51 of 100 (Notable)
23 September 2022Groningen-1, NLdaily rain (Tie)20.2 mm (0.8 in)tie53 years6 of 100 (Routine)
18 September 2022Groningen-1, NLdaily rain30.5 mm (1.2 in)6.2 mm (0.24 in)108 years50 of 100 (Notable)

Extremes by Year

1846 to 2026
Yearly extremes at Groningen-1: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)75.6 mm (3.0 in)193230.5 mm (1.2 in)181
Wettest five days (Rx5day)98.1 mm (3.9 in)199655.7 mm (2.2 in)180
Longest dry spell (CDD)50 days185319 days181

Wettest day (Rx1day)

Wettest day (Rx1day) at Groningen-1 by year The wettest day of the year at Groningen-1, 1846 to 2026. The record is 75.6 mm (3.0 in) in 1932, marked on the chart; the median year is 30.5 mm (1.2 in). 020406080186018801900192019401960198020002020Record: 75.6 mm (3.0 in) in 1932
The wettest day of the year at Groningen-1, 1846 to 2026. The record is 75.6 mm (3.0 in) in 1932, marked on the chart; the median year is 30.5 mm (1.2 in).
Wettest day (Rx1day) at Groningen-1 by year
YearWettest day (Rx1day)
18460.0 mm (0.00 in)
184720.5 mm (0.8 in)
184843.9 mm (1.7 in)
184922.9 mm (0.9 in)
185024.4 mm (1.0 in)
185142.7 mm (1.7 in)
185220.0 mm (0.8 in)
185327.6 mm (1.1 in)
185421.8 mm (0.9 in)
185538.6 mm (1.5 in)
185636.8 mm (1.4 in)
185721.0 mm (0.8 in)
185822.5 mm (0.9 in)
185934.9 mm (1.4 in)
186032.4 mm (1.3 in)
186124.8 mm (1.0 in)
186223.4 mm (0.9 in)
186324.4 mm (1.0 in)
186446.4 mm (1.8 in)
186538.2 mm (1.5 in)
186623.0 mm (0.9 in)
186731.8 mm (1.3 in)
186823.0 mm (0.9 in)
186932.3 mm (1.3 in)
187031.9 mm (1.3 in)
187134.7 mm (1.4 in)
187235.1 mm (1.4 in)
187358.5 mm (2.3 in)
187420.1 mm (0.8 in)
187522.3 mm (0.9 in)
187619.5 mm (0.8 in)
187741.0 mm (1.6 in)
187827.5 mm (1.1 in)
187918.1 mm (0.7 in)
188020.4 mm (0.8 in)
188127.2 mm (1.1 in)
188236.1 mm (1.4 in)
188316.6 mm (0.7 in)
188440.4 mm (1.6 in)
188522.8 mm (0.9 in)
188620.3 mm (0.8 in)
188730.1 mm (1.2 in)
188849.2 mm (1.9 in)
188927.9 mm (1.1 in)
189036.2 mm (1.4 in)
189119.7 mm (0.8 in)
189231.8 mm (1.3 in)
189325.9 mm (1.0 in)
189432.7 mm (1.3 in)
189524.9 mm (1.0 in)
189640.3 mm (1.6 in)
189736.0 mm (1.4 in)
189822.6 mm (0.9 in)
189916.7 mm (0.7 in)
190031.5 mm (1.2 in)
190132.6 mm (1.3 in)
190227.6 mm (1.1 in)
190332.8 mm (1.3 in)
190419.9 mm (0.8 in)
190522.4 mm (0.9 in)
190635.0 mm (1.4 in)
190726.5 mm (1.0 in)
190820.9 mm (0.8 in)
190927.2 mm (1.1 in)
191031.4 mm (1.2 in)
191131.9 mm (1.3 in)
191238.6 mm (1.5 in)
191332.1 mm (1.3 in)
191433.4 mm (1.3 in)
191536.6 mm (1.4 in)
191619.3 mm (0.8 in)
191740.1 mm (1.6 in)
191839.5 mm (1.6 in)
191917.1 mm (0.7 in)
192025.4 mm (1.0 in)
192128.4 mm (1.1 in)
192234.6 mm (1.4 in)
192323.8 mm (0.9 in)
192423.0 mm (0.9 in)
192525.8 mm (1.0 in)
192635.4 mm (1.4 in)
192753.7 mm (2.1 in)
192824.4 mm (1.0 in)
192923.3 mm (0.9 in)
193037.4 mm (1.5 in)
193149.1 mm (1.9 in)
193275.6 mm (3.0 in)
193335.2 mm (1.4 in)
193424.1 mm (0.9 in)
193531.8 mm (1.3 in)
193625.9 mm (1.0 in)
193732.8 mm (1.3 in)
193823.1 mm (0.9 in)
193926.6 mm (1.0 in)
194019.6 mm (0.8 in)
194122.9 mm (0.9 in)
194229.4 mm (1.2 in)
194320.9 mm (0.8 in)
194437.5 mm (1.5 in)
194541.7 mm (1.6 in)
194628.0 mm (1.1 in)
194731.7 mm (1.2 in)
194837.5 mm (1.5 in)
194925.0 mm (1.0 in)
195055.1 mm (2.2 in)
195126.5 mm (1.0 in)
195240.0 mm (1.6 in)
195330.7 mm (1.2 in)
195438.0 mm (1.5 in)
195543.1 mm (1.7 in)
195626.4 mm (1.0 in)
195753.8 mm (2.1 in)
195823.6 mm (0.9 in)
195924.9 mm (1.0 in)
196059.2 mm (2.3 in)
196141.7 mm (1.6 in)
196224.8 mm (1.0 in)
196326.7 mm (1.1 in)
196431.0 mm (1.2 in)
196551.0 mm (2.0 in)
196632.8 mm (1.3 in)
196727.5 mm (1.1 in)
196844.7 mm (1.8 in)
196944.5 mm (1.8 in)
197037.3 mm (1.5 in)
197126.0 mm (1.0 in)
197248.1 mm (1.9 in)
197321.5 mm (0.8 in)
197433.3 mm (1.3 in)
197522.5 mm (0.9 in)
197623.9 mm (0.9 in)
197733.7 mm (1.3 in)
197821.1 mm (0.8 in)
197927.7 mm (1.1 in)
198024.3 mm (1.0 in)
198127.3 mm (1.1 in)
198230.7 mm (1.2 in)
198326.7 mm (1.1 in)
198431.9 mm (1.3 in)
198524.8 mm (1.0 in)
198627.1 mm (1.1 in)
198721.1 mm (0.8 in)
198829.5 mm (1.2 in)
198931.4 mm (1.2 in)
199028.2 mm (1.1 in)
199141.2 mm (1.6 in)
199225.1 mm (1.0 in)
199344.1 mm (1.7 in)
199441.1 mm (1.6 in)
199530.2 mm (1.2 in)
199669.3 mm (2.7 in)
199755.6 mm (2.2 in)
199832.5 mm (1.3 in)
199935.4 mm (1.4 in)
200036.0 mm (1.4 in)
200140.5 mm (1.6 in)
200234.1 mm (1.3 in)
200335.5 mm (1.4 in)
200445.0 mm (1.8 in)
200525.0 mm (1.0 in)
200633.7 mm (1.3 in)
200743.6 mm (1.7 in)
200840.0 mm (1.6 in)
200929.5 mm (1.2 in)
201034.1 mm (1.3 in)
201149.0 mm (1.9 in)
201224.7 mm (1.0 in)
201330.0 mm (1.2 in)
201421.0 mm (0.8 in)
201532.5 mm (1.3 in)
201627.3 mm (1.1 in)
201725.8 mm (1.0 in)
201830.8 mm (1.2 in)
201928.5 mm (1.1 in)
202030.5 mm (1.2 in)
202127.3 mm (1.1 in)
202230.5 mm (1.2 in)
202338.0 mm (1.5 in)
202453.0 mm (2.1 in)
202530.1 mm (1.2 in)
202645.5 mm (1.8 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Groningen-1 by year The wettest five days of the year at Groningen-1, 1846 to 2026. The record is 98.1 mm (3.9 in) in 1996, marked on the chart; the median year is 55.7 mm (2.2 in). 20406080100186018801900192019401960198020002020Record: 98.1 mm (3.9 in) in 1996
The wettest five days of the year at Groningen-1, 1846 to 2026. The record is 98.1 mm (3.9 in) in 1996, marked on the chart; the median year is 55.7 mm (2.2 in).
Wettest five days (Rx5day) at Groningen-1 by year
YearWettest five days (Rx5day)
1846n/a
184751.8 mm (2.0 in)
184869.3 mm (2.7 in)
184959.5 mm (2.3 in)
185045.1 mm (1.8 in)
185156.0 mm (2.2 in)
185254.7 mm (2.2 in)
185337.1 mm (1.5 in)
185434.9 mm (1.4 in)
185550.1 mm (2.0 in)
185644.7 mm (1.8 in)
185739.4 mm (1.6 in)
185846.6 mm (1.8 in)
185958.4 mm (2.3 in)
186048.4 mm (1.9 in)
186140.9 mm (1.6 in)
186247.0 mm (1.9 in)
186350.9 mm (2.0 in)
186457.1 mm (2.2 in)
186563.1 mm (2.5 in)
186637.2 mm (1.5 in)
186757.9 mm (2.3 in)
186842.1 mm (1.7 in)
186955.4 mm (2.2 in)
187064.5 mm (2.5 in)
187142.0 mm (1.7 in)
187255.2 mm (2.2 in)
187370.9 mm (2.8 in)
187449.3 mm (1.9 in)
187558.5 mm (2.3 in)
187659.3 mm (2.3 in)
187751.2 mm (2.0 in)
187848.6 mm (1.9 in)
187937.1 mm (1.5 in)
188054.8 mm (2.2 in)
188143.5 mm (1.7 in)
188269.0 mm (2.7 in)
188337.4 mm (1.5 in)
188451.8 mm (2.0 in)
188548.7 mm (1.9 in)
188650.7 mm (2.0 in)
188749.0 mm (1.9 in)
188858.8 mm (2.3 in)
188952.7 mm (2.1 in)
189052.8 mm (2.1 in)
189139.2 mm (1.5 in)
189255.3 mm (2.2 in)
189356.4 mm (2.2 in)
189457.4 mm (2.3 in)
189546.1 mm (1.8 in)
189657.2 mm (2.3 in)
189772.5 mm (2.9 in)
189852.0 mm (2.0 in)
189954.4 mm (2.1 in)
190047.4 mm (1.9 in)
190147.4 mm (1.9 in)
190247.2 mm (1.9 in)
190357.6 mm (2.3 in)
190442.3 mm (1.7 in)
190564.2 mm (2.5 in)
190665.2 mm (2.6 in)
190744.8 mm (1.8 in)
190843.4 mm (1.7 in)
190955.9 mm (2.2 in)
191057.7 mm (2.3 in)
191169.3 mm (2.7 in)
191264.1 mm (2.5 in)
191347.0 mm (1.9 in)
191479.7 mm (3.1 in)
191575.9 mm (3.0 in)
191637.0 mm (1.5 in)
191782.4 mm (3.2 in)
191855.2 mm (2.2 in)
191942.0 mm (1.7 in)
192054.5 mm (2.1 in)
192145.4 mm (1.8 in)
192259.5 mm (2.3 in)
192351.3 mm (2.0 in)
192434.6 mm (1.4 in)
192546.7 mm (1.8 in)
192657.1 mm (2.2 in)
192761.3 mm (2.4 in)
192858.8 mm (2.3 in)
192943.1 mm (1.7 in)
193060.5 mm (2.4 in)
193171.5 mm (2.8 in)
193288.6 mm (3.5 in)
193361.4 mm (2.4 in)
193444.3 mm (1.7 in)
193551.0 mm (2.0 in)
193660.5 mm (2.4 in)
193754.8 mm (2.2 in)
193873.5 mm (2.9 in)
193952.6 mm (2.1 in)
194054.9 mm (2.2 in)
194147.5 mm (1.9 in)
194248.4 mm (1.9 in)
194346.0 mm (1.8 in)
194468.7 mm (2.7 in)
194562.5 mm (2.5 in)
194654.6 mm (2.1 in)
194750.2 mm (2.0 in)
194864.0 mm (2.5 in)
194960.1 mm (2.4 in)
195069.6 mm (2.7 in)
195154.8 mm (2.2 in)
195278.3 mm (3.1 in)
195397.7 mm (3.8 in)
195454.6 mm (2.1 in)
195556.6 mm (2.2 in)
195650.7 mm (2.0 in)
195770.7 mm (2.8 in)
195850.6 mm (2.0 in)
195959.1 mm (2.3 in)
196071.9 mm (2.8 in)
196162.5 mm (2.5 in)
196247.0 mm (1.9 in)
196363.2 mm (2.5 in)
196436.7 mm (1.4 in)
196570.1 mm (2.8 in)
196655.1 mm (2.2 in)
196755.5 mm (2.2 in)
196893.1 mm (3.7 in)
196950.8 mm (2.0 in)
197092.3 mm (3.6 in)
197143.9 mm (1.7 in)
197269.5 mm (2.7 in)
197352.6 mm (2.1 in)
197460.1 mm (2.4 in)
197538.2 mm (1.5 in)
197651.6 mm (2.0 in)
197753.3 mm (2.1 in)
197847.7 mm (1.9 in)
197953.8 mm (2.1 in)
198054.7 mm (2.2 in)
198169.6 mm (2.7 in)
198265.5 mm (2.6 in)
198357.4 mm (2.3 in)
198474.5 mm (2.9 in)
198560.0 mm (2.4 in)
198667.3 mm (2.6 in)
198757.5 mm (2.3 in)
198870.6 mm (2.8 in)
198950.4 mm (2.0 in)
199058.0 mm (2.3 in)
199159.1 mm (2.3 in)
199259.2 mm (2.3 in)
199361.4 mm (2.4 in)
199489.9 mm (3.5 in)
199565.4 mm (2.6 in)
199698.1 mm (3.9 in)
199793.7 mm (3.7 in)
199872.0 mm (2.8 in)
199962.9 mm (2.5 in)
200051.9 mm (2.0 in)
200166.2 mm (2.6 in)
200277.4 mm (3.0 in)
200352.4 mm (2.1 in)
200480.7 mm (3.2 in)
200542.6 mm (1.7 in)
200654.6 mm (2.1 in)
200775.8 mm (3.0 in)
200867.7 mm (2.7 in)
200959.3 mm (2.3 in)
201088.5 mm (3.5 in)
201183.3 mm (3.3 in)
201268.3 mm (2.7 in)
201361.4 mm (2.4 in)
201450.2 mm (2.0 in)
201568.6 mm (2.7 in)
201642.7 mm (1.7 in)
201758.3 mm (2.3 in)
201847.5 mm (1.9 in)
201974.5 mm (2.9 in)
202049.4 mm (1.9 in)
202146.5 mm (1.8 in)
202273.8 mm (2.9 in)
202359.9 mm (2.4 in)
202479.5 mm (3.1 in)
202561.0 mm (2.4 in)
202649.5 mm (1.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Groningen-1 by year The longest dry spell of the year at Groningen-1, 1846 to 2026. The record is 50 days in 1853, marked on the chart; the median year is 19 days. 0204060186018801900192019401960198020002020Record: 50 days in 1853
The longest dry spell of the year at Groningen-1, 1846 to 2026. The record is 50 days in 1853, marked on the chart; the median year is 19 days.
Longest dry spell (CDD) at Groningen-1 by year
YearLongest dry spell (CDD)
18461 day
184726 days
184818 days
184911 days
185016 days
185114 days
185222 days
185350 days
185441 days
185525 days
185618 days
185718 days
185828 days
185914 days
186025 days
186123 days
186216 days
186319 days
186427 days
186539 days
186633 days
186718 days
186820 days
186920 days
187029 days
187117 days
187213 days
187319 days
187422 days
187525 days
187616 days
187712 days
187821 days
187919 days
188028 days
188117 days
188219 days
188324 days
188419 days
188516 days
188622 days
188729 days
188814 days
188926 days
189020 days
189127 days
189218 days
189328 days
189433 days
189518 days
189615 days
189725 days
189817 days
189931 days
190014 days
190118 days
190217 days
190322 days
190417 days
190516 days
190618 days
190724 days
190823 days
190918 days
191016 days
191129 days
191219 days
191318 days
191419 days
191519 days
191626 days
191724 days
191817 days
191922 days
192042 days
192136 days
192221 days
192314 days
192415 days
192518 days
192615 days
192718 days
192832 days
192919 days
193022 days
193112 days
193220 days
193314 days
193418 days
193518 days
193613 days
193717 days
193819 days
193923 days
194025 days
194124 days
194231 days
194331 days
194419 days
194521 days
194619 days
194731 days
194818 days
194919 days
195016 days
195127 days
195216 days
195323 days
195417 days
195515 days
195620 days
195715 days
195813 days
195932 days
196027 days
196118 days
196221 days
196321 days
196424 days
196518 days
196617 days
196718 days
196816 days
196919 days
197020 days
197119 days
197222 days
197324 days
197439 days
197520 days
197623 days
197719 days
197821 days
197910 days
198027 days
198117 days
198217 days
198317 days
198426 days
198522 days
198638 days
198714 days
198817 days
198920 days
199018 days
199124 days
199216 days
199319 days
199417 days
199529 days
199633 days
199722 days
199815 days
199925 days
200012 days
200113 days
200223 days
200324 days
200418 days
200518 days
200619 days
200737 days
200815 days
200922 days
201020 days
201127 days
201227 days
201325 days
201416 days
201522 days
201617 days
201716 days
201819 days
201919 days
202028 days
202116 days
202231 days
202335 days
202411 days
202527 days
202612 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.

Rainfall Return Levels

179 years, 1847 to 2025

A day with at least 29.9 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 65.6 mm (2.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Groningen-1: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years29.9 mm (1.2 in)
5 years38.7 mm (1.5 in)
10 years44.8 mm (1.8 in)
25 years52.8 mm (2.1 in)
50 years59.1 mm (2.3 in)
100 years65.6 mm (2.6 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 179 years of values from 1847 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: 75.6 mm (3.0 in) in 1932; 69.3 mm (2.7 in) in 1996; 59.2 mm (2.3 in) in 1960.

Download the Data

  • Data for Groningen-1 standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Groningen-1 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 . Last revised (2026-10-12).