Daily records
Page built 2026-10-19
Data as of 2026-10-17
Search
Built 2026-10-19 (19 October 2026)

Libby Dam (Base) Threshold Days by Year (USC00245011)

14 fixed thresholds counted per year at Libby Dam (Base) (USC00245011): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Libby Dam (Base) Thresholds

  • Libby Dam (Base): days with a maximum temperature at or above 30 C (86 F) in 39 years, most in 2001 with 66.
  • Libby Dam (Base): days with a maximum temperature at or above 90 F (32.2 C) in 39 years, most in 2003 with 43.
  • Libby Dam (Base): days with a maximum temperature at or below 0 C (32 F) in 39 years, most in 1996 with 55.
  • Libby Dam (Base): nights with a minimum temperature at or below 0 C (32 F) in 39 years, most in 1999 with 198.
  • 14 fixed thresholds have at least one qualifying day at Libby Dam (Base).
39 years with a qualifying day
Days at or above 30 C (86 F) per year at Libby Dam (Base) Days per year at Libby Dam (Base) with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 66 in 2001. 0204060801987: 341988: 451989: 321990: 461991: 331992: 441993: 241994: 611995: 271996: 441997: 201998: 511999: 332000: 392001: 662002: 392003: 542004: 322005: 352006: 562007: 612008: 242009: 412010: 292011: 372012: 382013: 532014: 412015: 462016: 312018: 392019: 332020: 432021: 512022: 582023: 562024: 492025: 642026: 471987199119951999200320072011201520202024
Days per year at Libby Dam (Base) with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 66 in 2001.
Days at or above 30 C (86 F) per year at Libby Dam (Base)
YearDaysDecade average
19873437
19884537
19893237
19904638.3
19913338.3
19924438.3
19932438.3
19946138.3
19952738.3
19964438.3
19972038.3
19985138.3
19993338.3
20003944.7
20016644.7
20023944.7
20035444.7
20043244.7
20053544.7
20065644.7
20076144.7
20082444.7
20094144.7
20102938.6
20113738.6
20123838.6
20135338.6
20144138.6
20154638.6
20163138.6
20183938.6
20193338.6
20204352.6
20215152.6
20225852.6
20235652.6
20244952.6
20256452.6
20264752.6
First to last qualifying date each year at Libby Dam (Base) For each year, a bar from the first to the last day at Libby Dam (Base) meeting 30 C (86 F). 1987: 8 May 1987 to 13 September 19871988: 13 May 1988 to 15 September 19881989: 6 June 1989 to 13 August 19891990: 23 June 1990 to 26 September 19901991: 3 July 1991 to 16 October 19911992: 7 May 1992 to 20 August 19921993: 11 May 1993 to 11 September 19931994: 10 May 1994 to 29 September 19941995: 29 May 1995 to 16 September 19951996: 8 June 1996 to 31 August 19961997: 6 July 1997 to 24 August 19971998: 3 July 1998 to 17 September 19981999: 15 June 1999 to 23 September 19992000: 29 June 2000 to 18 September 20002001: 23 May 2001 to 25 September 20012002: 15 June 2002 to 18 September 20022003: 25 May 2003 to 8 September 20032004: 5 June 2004 to 31 August 20042005: 22 June 2005 to 9 September 20052006: 17 May 2006 to 13 September 20062007: 1 June 2007 to 16 September 20072008: 18 May 2008 to 25 August 20082009: 30 May 2009 to 26 September 20092010: 14 June 2010 to 27 August 20102011: 23 June 2011 to 24 September 20112012: 24 April 2012 to 20 September 20122013: 12 May 2013 to 17 September 20132014: 2 July 2014 to 25 September 20142015: 7 June 2015 to 13 September 20152016: 5 June 2016 to 1 September 20162018: 16 May 2018 to 8 September 20182019: 3 June 2019 to 6 September 20192020: 24 June 2020 to 16 September 20202021: 2 June 2021 to 10 September 20212022: 18 June 2022 to 8 September 20222023: 20 May 2023 to 17 September 20232024: 13 May 2024 to 26 September 20242025: 26 May 2025 to 26 September 20252026: 3 May 2026 to 28 August 202619871992199720022007201220182023JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Libby Dam (Base) meeting 30 C (86 F).
First to last qualifying date each year at Libby Dam (Base)
YearFirst dateLast date
19871987-05-081987-09-13
19881988-05-131988-09-15
19891989-06-061989-08-13
19901990-06-231990-09-26
19911991-07-031991-10-16
19921992-05-071992-08-20
19931993-05-111993-09-11
19941994-05-101994-09-29
19951995-05-291995-09-16
19961996-06-081996-08-31
19971997-07-061997-08-24
19981998-07-031998-09-17
19991999-06-151999-09-23
20002000-06-292000-09-18
20012001-05-232001-09-25
20022002-06-152002-09-18
20032003-05-252003-09-08
20042004-06-052004-08-31
20052005-06-222005-09-09
20062006-05-172006-09-13
20072007-06-012007-09-16
20082008-05-182008-08-25
20092009-05-302009-09-26
20102010-06-142010-08-27
20112011-06-232011-09-24
20122012-04-242012-09-20
20132013-05-122013-09-17
20142014-07-022014-09-25
20152015-06-072015-09-13
20162016-06-052016-09-01
20182018-05-162018-09-08
20192019-06-032019-09-06
20202020-06-242020-09-16
20212021-06-022021-09-10
20222022-06-182022-09-08
20232023-05-202023-09-17
20242024-05-132024-09-26
20252025-05-262025-09-26
20262026-05-032026-08-28

Every Fixed Threshold

Fixed thresholds at Libby Dam (Base)
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3966200147
35 C (95 F): Days382520216
40 C (104 F): Days4420012
90 F (32.2 C): Days3943200331
100 F (37.8 C): Days18720011
0 C (32 F): Ice days (max395519968
0 C (32 F): Frost days (min391981999100
-10 C (14 F): Days with min395619966
-20 C (-4 F): Days with min221219935
-30 C (-22 F): Days with min1220242
10 mm (0.39 in): Days with 10 mm or more rain391920068
25 mm (0.98 in): Days with 25 mm or more rain21319901
10 cm (3.9 in): Days with 10 cm or more snowfall13420081
25 cm (9.8 in): Days with 25 cm or more snowfall1120191

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1987.

Download the Data

  • Data for Libby Dam (Base) 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).