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Built 2026-10-19 (19 October 2026)

Mt Rushmore Nmem Threshold Days by Year (USC00395870)

18 fixed thresholds counted per year at Mt Rushmore Nmem (USC00395870): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mt Rushmore Nmem Thresholds

  • Mt Rushmore Nmem: days with a maximum temperature at or above 30 C (86 F) in 64 years, most in 1970 with 47.
  • Mt Rushmore Nmem: days with a maximum temperature at or below 0 C (32 F) in 64 years, most in 1996 with 69.
  • Mt Rushmore Nmem: nights with a minimum temperature at or below 0 C (32 F) in 64 years, most in 1996 with 176.
  • Mt Rushmore Nmem: nights with a minimum temperature at or below -10 C (14 F) in 64 years, most in 1978 with 77.
  • 18 fixed thresholds have at least one qualifying day at Mt Rushmore Nmem.
64 years with a qualifying day
Days at or above 30 C (86 F) per year at Mt Rushmore Nmem Days per year at Mt Rushmore Nmem with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 47 in 1970. 02040601962: 111963: 181964: 321965: 81966: 321967: 191968: 191969: 271970: 471971: 241972: 91973: 271974: 351975: 281976: 311977: 231978: 271979: 171980: 321981: 181982: 201983: 451984: 201985: 281986: 171987: 211988: 461989: 261990: 281991: 241992: 51993: 41994: 161995: 221996: 101997: 61998: 121999: 152000: 212001: 202002: 282003: 232004: 122005: 242006: 232007: 282009: 62010: 182011: 192012: 302013: 142014: 72015: 142016: 182017: 182018: 122019: 112020: 202021: 302022: 302023: 142024: 282025: 152026: 281962196919761983199019972004201220192026
Days per year at Mt Rushmore Nmem with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 47 in 1970.
Days at or above 30 C (86 F) per year at Mt Rushmore Nmem
YearDaysDecade average
19621120.8
19631820.8
19643220.8
1965820.8
19663220.8
19671920.8
19681920.8
19692720.8
19704726.8
19712426.8
1972926.8
19732726.8
19743526.8
19752826.8
19763126.8
19772326.8
19782726.8
19791726.8
19803227.3
19811827.3
19822027.3
19834527.3
19842027.3
19852827.3
19861727.3
19872127.3
19884627.3
19892627.3
19902814.2
19912414.2
1992514.2
1993414.2
19941614.2
19952214.2
19961014.2
1997614.2
19981214.2
19991514.2
20002120.6
20012020.6
20022820.6
20032320.6
20041220.6
20052420.6
20062320.6
20072820.6
2009620.6
20101816.1
20111916.1
20123016.1
20131416.1
2014716.1
20151416.1
20161816.1
20171816.1
20181216.1
20191116.1
20202023.6
20213023.6
20223023.6
20231423.6
20242823.6
20251523.6
20262823.6
First to last qualifying date each year at Mt Rushmore Nmem For each year, a bar from the first to the last day at Mt Rushmore Nmem meeting 30 C (86 F). 1962: 27 June 1962 to 27 August 19621963: 28 June 1963 to 7 September 19631964: 25 June 1964 to 8 September 19641965: 20 July 1965 to 13 August 19651966: 20 June 1966 to 11 September 19661967: 23 May 1967 to 28 August 19671968: 3 June 1968 to 28 August 19681969: 26 May 1969 to 3 September 19691970: 22 June 1970 to 6 September 19701971: 23 June 1971 to 3 September 19711972: 9 July 1972 to 18 September 19721973: 9 June 1973 to 31 August 19731974: 18 June 1974 to 26 September 19741975: 1 July 1975 to 10 September 19751976: 14 May 1976 to 7 September 19761977: 2 June 1977 to 8 September 19771978: 15 May 1978 to 10 September 19781979: 12 June 1979 to 16 September 19791980: 4 June 1980 to 6 September 19801981: 23 June 1981 to 12 September 19811982: 4 July 1982 to 10 September 19821983: 24 June 1983 to 8 September 19831984: 8 July 1984 to 18 September 19841985: 7 June 1985 to 31 August 19851986: 3 June 1986 to 24 August 19861987: 5 June 1987 to 11 August 19871988: 6 June 1988 to 21 August 19881989: 16 June 1989 to 3 September 19891990: 26 June 1990 to 13 September 19901991: 12 June 1991 to 7 September 19911992: 18 May 1992 to 23 September 19921993: 29 July 1993 to 24 August 19931994: 13 June 1994 to 9 September 19941995: 14 June 1995 to 4 September 19951996: 14 June 1996 to 5 September 19961997: 22 June 1997 to 24 August 19971998: 11 July 1998 to 18 September 19981999: 25 June 1999 to 31 August 19992000: 6 June 2000 to 17 September 20002001: 13 May 2001 to 5 September 20012002: 23 June 2002 to 7 September 20022003: 29 May 2003 to 6 September 20032004: 6 June 2004 to 18 September 20042005: 18 June 2005 to 8 September 20052006: 14 June 2006 to 14 September 20062007: 13 May 2007 to 4 September 20072009: 19 May 2009 to 13 August 20092010: 28 May 2010 to 29 August 20102011: 6 June 2011 to 2 October 20112012: 17 June 2012 to 10 September 20122013: 10 July 2013 to 7 September 20132014: 5 July 2014 to 26 September 20142015: 9 June 2015 to 26 September 20152016: 9 June 2016 to 22 August 20162017: 9 June 2017 to 12 September 20172018: 5 June 2018 to 12 September 20182019: 28 June 2019 to 16 September 20192020: 19 May 2020 to 5 September 20202021: 4 June 2021 to 18 September 20212022: 18 June 2022 to 7 September 20222023: 23 July 2023 to 3 September 20232024: 15 June 2024 to 29 September 20242025: 19 June 2025 to 11 September 20252026: 6 June 2026 to 6 September 202619621970197819861994200220112019JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Mt Rushmore Nmem meeting 30 C (86 F).
First to last qualifying date each year at Mt Rushmore Nmem
YearFirst dateLast date
19621962-06-271962-08-27
19631963-06-281963-09-07
19641964-06-251964-09-08
19651965-07-201965-08-13
19661966-06-201966-09-11
19671967-05-231967-08-28
19681968-06-031968-08-28
19691969-05-261969-09-03
19701970-06-221970-09-06
19711971-06-231971-09-03
19721972-07-091972-09-18
19731973-06-091973-08-31
19741974-06-181974-09-26
19751975-07-011975-09-10
19761976-05-141976-09-07
19771977-06-021977-09-08
19781978-05-151978-09-10
19791979-06-121979-09-16
19801980-06-041980-09-06
19811981-06-231981-09-12
19821982-07-041982-09-10
19831983-06-241983-09-08
19841984-07-081984-09-18
19851985-06-071985-08-31
19861986-06-031986-08-24
19871987-06-051987-08-11
19881988-06-061988-08-21
19891989-06-161989-09-03
19901990-06-261990-09-13
19911991-06-121991-09-07
19921992-05-181992-09-23
19931993-07-291993-08-24
19941994-06-131994-09-09
19951995-06-141995-09-04
19961996-06-141996-09-05
19971997-06-221997-08-24
19981998-07-111998-09-18
19991999-06-251999-08-31
20002000-06-062000-09-17
20012001-05-132001-09-05
20022002-06-232002-09-07
20032003-05-292003-09-06
20042004-06-062004-09-18
20052005-06-182005-09-08
20062006-06-142006-09-14
20072007-05-132007-09-04
20092009-05-192009-08-13
20102010-05-282010-08-29
20112011-06-062011-10-02
20122012-06-172012-09-10
20132013-07-102013-09-07
20142014-07-052014-09-26
20152015-06-092015-09-26
20162016-06-092016-08-22
20172017-06-092017-09-12
20182018-06-052018-09-12
20192019-06-282019-09-16
20202020-05-192020-09-05
20212021-06-042021-09-18
20222022-06-182022-09-07
20232023-07-232023-09-03
20242024-06-152024-09-29
20252025-06-192025-09-11
20262026-06-062026-09-06

Every Fixed Threshold

Fixed thresholds at Mt Rushmore Nmem
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days6447197028
35 C (95 F): Days39819744
90 F (32.2 C): Days6228198314
100 F (37.8 C): Days5319851
0 C (32 F): Ice days (max6469199618
0 C (32 F): Frost days (min64176199684
-10 C (14 F): Days with min6477197816
-20 C (-4 F): Days with min612219964
-30 C (-22 F): Days with min9419891
20 C (68 F): Tropical nights (min6418198812
25 C (77 F): Days with min7220061
10 mm (0.39 in): Days with 10 mm or more rain6331201912
25 mm (0.98 in): Days with 25 mm or more rain611019622
50 mm (1.97 in): Days with 50 mm or more rain21219631
100 mm (3.94 in): Days with 100 mm or more rain1119721
10 cm (3.9 in): Days with 10 cm or more snowfall571319961
25 cm (9.8 in): Days with 25 cm or more snowfall15219711
50 cm (19.7 in): Days with 50 cm or more snowfall2119761

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1962.

Download the Data

  • Data for Mt Rushmore Nmem 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 (2026-10-17).