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Data as of 2026-10-18
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Built 2026-10-19 (19 October 2026)

Bonn-Roleber Threshold Days by Year (GME00130990)

12 fixed thresholds counted per year at Bonn-Roleber (GME00130990): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Bonn-Roleber Thresholds

  • Bonn-Roleber: days with 10 mm (0.39 in) or more of precipitation in 35 years, most in 2024 with 29.
  • Bonn-Roleber: days with 25 mm (0.98 in) or more of precipitation in 30 years, most in 2014 with 7.
  • Bonn-Roleber: days with a maximum temperature at or above 30 C (86 F) in 24 years, most in 2019 with 19.
  • Bonn-Roleber: nights with a minimum temperature at or below 0 C (32 F) in 24 years, most in 2010 with 91.
  • 12 fixed thresholds have at least one qualifying day at Bonn-Roleber.
24 years with a qualifying day
Days at or above 30 C (86 F) per year at Bonn-Roleber Days per year at Bonn-Roleber with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 19 in 2019. 01020302002: 32003: 142004: 32006: 132007: 62008: 22009: 42010: 122011: 32012: 62013: 112014: 72015: 142016: 122017: 82018: 152019: 192020: 142021: 42022: 172023: 82024: 102025: 102026: 2820022006200920122015201820212024
Days per year at Bonn-Roleber with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 19 in 2019.
Days at or above 30 C (86 F) per year at Bonn-Roleber
YearDaysDecade average
200236.4
2003146.4
200436.4
2006136.4
200766.4
200826.4
200946.4
20101210.7
2011310.7
2012610.7
20131110.7
2014710.7
20151410.7
20161210.7
2017810.7
20181510.7
20191910.7
20201413
2021413
20221713
2023813
20241013
20251013
20262813
First to last qualifying date each year at Bonn-Roleber For each year, a bar from the first to the last day at Bonn-Roleber meeting 30 C (86 F). 2002: 17 June 2002 to 29 July 20022003: 23 June 2003 to 13 August 20032004: 5 August 2004 to 9 August 20042006: 13 June 2006 to 30 July 20062007: 7 June 2007 to 6 August 20072008: 2 July 2008 to 6 August 20082009: 2 July 2009 to 20 August 20092010: 1 July 2010 to 21 July 20102011: 30 May 2011 to 28 June 20112012: 26 July 2012 to 10 September 20122013: 18 June 2013 to 6 September 20132014: 7 June 2014 to 20 July 20142015: 5 June 2015 to 31 August 20152016: 23 June 2016 to 14 September 20162017: 29 May 2017 to 19 July 20172018: 24 July 2018 to 18 September 20182019: 2 June 2019 to 31 August 20192020: 26 June 2020 to 16 September 20202021: 16 June 2021 to 19 June 20212022: 18 June 2022 to 25 August 20222023: 25 June 2023 to 11 September 20232024: 26 June 2024 to 1 September 20242025: 13 June 2025 to 14 August 20252026: 26 May 2026 to 27 August 202620022006200920122015201820212024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Bonn-Roleber meeting 30 C (86 F).
First to last qualifying date each year at Bonn-Roleber
YearFirst dateLast date
20022002-06-172002-07-29
20032003-06-232003-08-13
20042004-08-052004-08-09
20062006-06-132006-07-30
20072007-06-072007-08-06
20082008-07-022008-08-06
20092009-07-022009-08-20
20102010-07-012010-07-21
20112011-05-302011-06-28
20122012-07-262012-09-10
20132013-06-182013-09-06
20142014-06-072014-07-20
20152015-06-052015-08-31
20162016-06-232016-09-14
20172017-05-292017-07-19
20182018-07-242018-09-18
20192019-06-022019-08-31
20202020-06-262020-09-16
20212021-06-162021-06-19
20222022-06-182022-08-25
20232023-06-252023-09-11
20242024-06-262024-09-01
20252025-06-132025-08-14
20262026-05-262026-08-27

Every Fixed Threshold

Fixed thresholds at Bonn-Roleber
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2419201928
35 C (95 F): Days13420197
40 C (104 F): Days1120191
90 F (32.2 C): Days2211201813
100 F (37.8 C): Days2320191
0 C (32 F): Ice days (max214120101
0 C (32 F): Frost days (min2491201022
-10 C (14 F): Days with min9920122
20 C (68 F): Tropical nights (min12320154
10 mm (0.39 in): Days with 10 mm or more rain3529202411
25 mm (0.98 in): Days with 25 mm or more rain30720141
50 mm (1.97 in): Days with 50 mm or more rain6119921

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2002.

Download the Data

  • 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). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-18).