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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Marrowbone Threshold Days by Year (USC00155165)

15 fixed thresholds counted per year at Marrowbone (USC00155165): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Marrowbone Thresholds

  • Marrowbone: days with a maximum temperature at or above 30 C (86 F) in 11 years, most in 1899 with 100.
  • Marrowbone: days with a maximum temperature at or above 90 F (32.2 C) in 11 years, most in 1899 with 63.
  • Marrowbone: days with a maximum temperature at or below 0 C (32 F) in 11 years, most in 1899 with 20.
  • Marrowbone: nights with a minimum temperature at or below 0 C (32 F) in 10 years, most in 2008 with 139.
  • 15 fixed thresholds have at least one qualifying day at Marrowbone.
11 years with a qualifying day
Days at or above 30 C (86 F) per year at Marrowbone Days per year at Marrowbone with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 100 in 1899. 02550751001895: 951896: 901897: 891899: 1001901: 611902: 932005: 822006: 602007: 932008: 732009: 42189518971901200520072009
Days per year at Marrowbone with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 100 in 1899.
Days at or above 30 C (86 F) per year at Marrowbone
YearDaysDecade average
18959593.5
18969093.5
18978993.5
189910093.5
19016177
19029377
20058270
20066070
20079370
20087370
20094270
First to last qualifying date each year at Marrowbone For each year, a bar from the first to the last day at Marrowbone meeting 30 C (86 F). 1895: 1 May 1895 to 26 September 18951896: 12 April 1896 to 19 September 18961897: 8 May 1897 to 17 October 18971899: 27 April 1899 to 18 September 18991901: 5 May 1901 to 12 September 19011902: 21 April 1902 to 23 September 19022005: 12 May 2005 to 21 October 20052006: 15 April 2006 to 29 August 20062007: 30 April 2007 to 9 October 20072008: 4 June 2008 to 13 October 20082009: 25 April 2009 to 15 September 2009189518971901200520072009JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Marrowbone meeting 30 C (86 F).
First to last qualifying date each year at Marrowbone
YearFirst dateLast date
18951895-05-011895-09-26
18961896-04-121896-09-19
18971897-05-081897-10-17
18991899-04-271899-09-18
19011901-05-051901-09-12
19021902-04-211902-09-23
20052005-05-122005-10-21
20062006-04-152006-08-29
20072007-04-302007-10-09
20082008-06-042008-10-13
20092009-04-252009-09-15

Every Fixed Threshold

Fixed thresholds at Marrowbone
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days11100189942
35 C (95 F): Days922190119
90 F (32.2 C): Days1163189912
100 F (37.8 C): Days4819015
0 C (32 F): Ice days (max112018999
0 C (32 F): Frost days (min101392008127
-10 C (14 F): Days with min1030200930
-20 C (-4 F): Days with min4618992
-30 C (-22 F): Days with min1118991
20 C (68 F): Tropical nights (min1049189510
25 C (77 F): Days with min1218952
10 mm (0.39 in): Days with 10 mm or more rain1055200955
25 mm (0.98 in): Days with 25 mm or more rain1018189914
50 mm (1.97 in): Days with 50 mm or more rain10418962
100 mm (3.94 in): Days with 100 mm or more rain1120091

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1895.

Download the Data

  • Data for Marrowbone 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 (2025-12-31).