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Built 2026-10-19 (19 October 2026)

Rotterdam Threshold Days by Year (NLE00152490)

11 fixed thresholds counted per year at Rotterdam (NLE00152490): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rotterdam Thresholds

  • Rotterdam: nights with a minimum temperature at or below 0 C (32 F) in 69 years, most in 1996 with 98.
  • Rotterdam: days with a maximum temperature at or below 0 C (32 F) in 57 years, most in 1963 with 44.
  • Rotterdam: days with 10 mm (0.39 in) or more of precipitation in 53 years, most in 2023 with 42.
  • Rotterdam: days with a maximum temperature at or above 30 C (86 F) in 50 years, most in 2019 with 11.
  • 11 fixed thresholds have at least one qualifying day at Rotterdam.
50 years with a qualifying day
Days at or above 30 C (86 F) per year at Rotterdam Days per year at Rotterdam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 11 in 2019. 0510151957: 41959: 41964: 31966: 21967: 21968: 21969: 31972: 11973: 21975: 51976: 91978: 11982: 41983: 21984: 21986: 11989: 21990: 21991: 21992: 11994: 51995: 81996: 21997: 41998: 21999: 32000: 22001: 32002: 42003: 82004: 12005: 42006: 92009: 12010: 42011: 22012: 22013: 72014: 32015: 32016: 62017: 22018: 72019: 112020: 112022: 102023: 52024: 42025: 82026: 131957196819761986199419992004201120162022
Days per year at Rotterdam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 11 in 2019.
Days at or above 30 C (86 F) per year at Rotterdam
YearDaysDecade average
195744
195944
196432.4
196622.4
196722.4
196822.4
196932.4
197213.6
197323.6
197553.6
197693.6
197813.6
198242.2
198322.2
198422.2
198612.2
198922.2
199023.2
199123.2
199213.2
199453.2
199583.2
199623.2
199743.2
199823.2
199933.2
200024
200134
200244
200384
200414
200544
200694
200914
201044.7
201124.7
201224.7
201374.7
201434.7
201534.7
201664.7
201724.7
201874.7
2019114.7
2020118.5
2022108.5
202358.5
202448.5
202588.5
2026138.5
First to last qualifying date each year at Rotterdam For each year, a bar from the first to the last day at Rotterdam meeting 30 C (86 F). 1957: 18 June 1957 to 6 July 19571959: 5 July 1959 to 18 July 19591964: 18 July 1964 to 27 August 19641966: 10 June 1966 to 13 August 19661967: 13 July 1967 to 18 July 19671968: 1 July 1968 to 2 July 19681969: 23 July 1969 to 10 August 19691972: 20 July 1972 to 20 July 19721973: 2 July 1973 to 5 July 19731975: 4 August 1975 to 8 August 19751976: 9 June 1976 to 4 July 19761978: 30 July 1978 to 30 July 19781982: 9 July 1982 to 4 August 19821983: 11 July 1983 to 17 July 19831984: 30 July 1984 to 23 August 19841986: 16 June 1986 to 16 June 19861989: 6 July 1989 to 22 July 19891990: 3 August 1990 to 4 August 19901991: 11 July 1991 to 6 August 19911992: 8 August 1992 to 8 August 19921994: 12 July 1994 to 4 August 19941995: 10 July 1995 to 19 August 19951996: 7 June 1996 to 20 August 19961997: 10 August 1997 to 13 August 19971998: 12 May 1998 to 10 August 19981999: 31 July 1999 to 2 August 19992000: 19 June 2000 to 20 June 20002001: 5 July 2001 to 25 August 20012002: 17 June 2002 to 30 July 20022003: 15 July 2003 to 12 August 20032004: 9 August 2004 to 9 August 20042005: 27 May 2005 to 24 June 20052006: 11 June 2006 to 26 July 20062009: 20 August 2009 to 20 August 20092010: 2 July 2010 to 20 July 20102011: 27 June 2011 to 28 June 20112012: 18 August 2012 to 19 August 20122013: 18 June 2013 to 5 September 20132014: 4 July 2014 to 19 July 20142015: 5 June 2015 to 4 July 20152016: 19 July 2016 to 14 September 20162017: 27 May 2017 to 19 June 20172018: 24 July 2018 to 7 August 20182019: 2 June 2019 to 27 August 20192020: 24 June 2020 to 15 September 20202022: 23 June 2022 to 5 September 20222023: 11 June 2023 to 10 September 20232024: 26 June 2024 to 12 August 20242025: 13 June 2025 to 14 August 20252026: 26 May 2026 to 14 August 202619571972198419952002201120182026JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Rotterdam meeting 30 C (86 F).
First to last qualifying date each year at Rotterdam
YearFirst dateLast date
19571957-06-181957-07-06
19591959-07-051959-07-18
19641964-07-181964-08-27
19661966-06-101966-08-13
19671967-07-131967-07-18
19681968-07-011968-07-02
19691969-07-231969-08-10
19721972-07-201972-07-20
19731973-07-021973-07-05
19751975-08-041975-08-08
19761976-06-091976-07-04
19781978-07-301978-07-30
19821982-07-091982-08-04
19831983-07-111983-07-17
19841984-07-301984-08-23
19861986-06-161986-06-16
19891989-07-061989-07-22
19901990-08-031990-08-04
19911991-07-111991-08-06
19921992-08-081992-08-08
19941994-07-121994-08-04
19951995-07-101995-08-19
19961996-06-071996-08-20
19971997-08-101997-08-13
19981998-05-121998-08-10
19991999-07-311999-08-02
20002000-06-192000-06-20
20012001-07-052001-08-25
20022002-06-172002-07-30
20032003-07-152003-08-12
20042004-08-092004-08-09
20052005-05-272005-06-24
20062006-06-112006-07-26
20092009-08-202009-08-20
20102010-07-022010-07-20
20112011-06-272011-06-28
20122012-08-182012-08-19
20132013-06-182013-09-05
20142014-07-042014-07-19
20152015-06-052015-07-04
20162016-07-192016-09-14
20172017-05-272017-06-19
20182018-07-242018-08-07
20192019-06-022019-08-27
20202020-06-242020-09-15
20222022-06-232022-09-05
20232023-06-112023-09-10
20242024-06-262024-08-12
20252025-06-132025-08-14
20262026-05-262026-08-14

Every Fixed Threshold

Fixed thresholds at Rotterdam
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days5011201913
35 C (95 F): Days6220183
90 F (32.2 C): Days30620207
0 C (32 F): Ice days (max574419631
0 C (32 F): Frost days (min6998199617
-10 C (14 F): Days with min322319632
20 C (68 F): Tropical nights (min7320203
10 mm (0.39 in): Days with 10 mm or more rain534220236
25 mm (0.98 in): Days with 25 mm or more rain44720041
50 mm (1.97 in): Days with 50 mm or more rain7119751
100 mm (3.94 in): Days with 100 mm or more rain1119751

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1957.

Download the Data

  • Data for Rotterdam 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). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-13).