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Built 2026-10-18 (18 October 2026)

Montello Wwtp Threshold Days by Year

18 fixed thresholds counted per year at Montello Wwtp (USC00475581): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Montello Wwtp Thresholds

  • Montello Wwtp: nights with a minimum temperature at or below 0 C (32 F) in 69 years, most in 1996 with 183.
  • Montello Wwtp: nights with a minimum temperature at or below -10 C (14 F) in 69 years, most in 2014 with 90.
  • Montello Wwtp: nights with a minimum temperature at or below -20 C (-4 F) in 69 years, most in 1963 with 43.
  • Montello Wwtp: days with 10 mm (0.39 in) or more of precipitation in 69 years, most in 1965 with 41.
  • 18 fixed thresholds have at least one qualifying day at Montello Wwtp.
68 years with a qualifying day
Days at or above 30 C (86 F) per year at Montello Wwtp Days per year at Montello Wwtp with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 53 in 1988. 02040601955: 461956: 221957: 241958: 241959: 441960: 181961: 321962: 191963: 301964: 311965: 161966: 241967: 91968: 291969: 71970: 371971: 351972: 271973: 251974: 161975: 421976: 481977: 301978: 311979: 131984: 251985: 301986: 171987: 371988: 531989: 201990: 181991: 341992: 151993: 121994: 191995: 321996: 201997: 201998: 351999: 312000: 82001: 352002: 412003: 322004: 52005: 412006: 232007: 342008: 72009: 52010: 182011: 282012: 472013: 202014: 42015: 162016: 222017: 162018: 222019: 82020: 222021: 242022: 262023: 342024: 172025: 232026: 231955196219691976198719942001200820152022
Days per year at Montello Wwtp with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 53 in 1988.
Days at or above 30 C (86 F) per year at Montello Wwtp
YearDaysDecade average
19554632
19562232
19572432
19582432
19594432
19601821.5
19613221.5
19621921.5
19633021.5
19643121.5
19651621.5
19662421.5
1967921.5
19682921.5
1969721.5
19703730.4
19713530.4
19722730.4
19732530.4
19741630.4
19754230.4
19764830.4
19773030.4
19783130.4
19791330.4
19842530.3
19853030.3
19861730.3
19873730.3
19885330.3
19892030.3
19901823.6
19913423.6
19921523.6
19931223.6
19941923.6
19953223.6
19962023.6
19972023.6
19983523.6
19993123.6
2000823.1
20013523.1
20024123.1
20033223.1
2004523.1
20054123.1
20062323.1
20073423.1
2008723.1
2009523.1
20101820.1
20112820.1
20124720.1
20132020.1
2014420.1
20151620.1
20162220.1
20171620.1
20182220.1
2019820.1
20202224.1
20212424.1
20222624.1
20233424.1
20241724.1
20252324.1
20262324.1
First to last qualifying date each year at Montello Wwtp For each year, a bar from the first to the last day at Montello Wwtp meeting 30 C (86 F). 1955: 3 May 1955 to 18 September 19551956: 22 May 1956 to 27 August 19561957: 16 June 1957 to 1 September 19571958: 28 June 1958 to 3 September 19581959: 2 May 1959 to 9 September 19591960: 23 April 1960 to 8 September 19601961: 13 May 1961 to 10 September 19611962: 15 May 1962 to 29 August 19621963: 2 June 1963 to 6 October 19631964: 22 May 1964 to 7 September 19641965: 2 May 1965 to 15 August 19651966: 20 June 1966 to 29 August 19661967: 26 May 1967 to 30 July 19671968: 4 June 1968 to 24 August 19681969: 28 May 1969 to 30 August 19691970: 21 May 1970 to 7 September 19701971: 6 June 1971 to 28 September 19711972: 18 May 1972 to 30 August 19721973: 9 June 1973 to 2 September 19731974: 2 July 1974 to 27 August 19741975: 18 May 1975 to 24 August 19751976: 6 June 1976 to 8 September 19761977: 11 April 1977 to 28 August 19771978: 26 May 1978 to 19 September 19781979: 15 June 1979 to 31 August 19791984: 6 June 1984 to 20 September 19841985: 19 April 1985 to 20 September 19851986: 31 May 1986 to 17 August 19861987: 21 April 1987 to 16 August 19871988: 29 May 1988 to 18 September 19881989: 22 June 1989 to 27 August 19891990: 24 April 1990 to 7 September 19901991: 7 April 1991 to 10 September 19911992: 2 May 1992 to 26 August 19921993: 11 May 1993 to 28 August 19931994: 19 April 1994 to 16 September 19941995: 16 June 1995 to 31 August 19951996: 18 May 1996 to 11 September 19961997: 21 June 1997 to 8 October 19971998: 15 May 1998 to 14 September 19981999: 29 May 1999 to 5 September 19992000: 9 June 2000 to 1 September 20002001: 16 May 2001 to 10 August 20012002: 16 April 2002 to 10 September 20022003: 15 April 2003 to 12 September 20032004: 8 June 2004 to 2 August 20042005: 8 June 2005 to 22 September 20052006: 29 May 2006 to 5 August 20062007: 30 April 2007 to 25 September 20072008: 27 June 2008 to 19 August 20082009: 24 June 2009 to 15 August 20092010: 24 May 2010 to 31 August 20102011: 12 May 2011 to 13 September 20112012: 20 May 2012 to 5 September 20122013: 1 May 2013 to 11 September 20132014: 1 June 2014 to 23 August 20142015: 10 June 2015 to 7 September 20152016: 7 May 2016 to 7 September 20162017: 4 June 2017 to 26 September 20172018: 25 May 2018 to 15 August 20182019: 28 June 2019 to 20 July 20192020: 27 May 2020 to 28 August 20202021: 2 May 2021 to 20 September 20212022: 11 May 2022 to 2 September 20222023: 13 April 2023 to 2 October 20232024: 19 May 2024 to 22 September 20242025: 16 May 2025 to 5 October 20252026: 17 May 2026 to 3 September 202619551964197319861995200420132022JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Montello Wwtp meeting 30 C (86 F).
First to last qualifying date each year at Montello Wwtp
YearFirst dateLast date
19551955-05-031955-09-18
19561956-05-221956-08-27
19571957-06-161957-09-01
19581958-06-281958-09-03
19591959-05-021959-09-09
19601960-04-231960-09-08
19611961-05-131961-09-10
19621962-05-151962-08-29
19631963-06-021963-10-06
19641964-05-221964-09-07
19651965-05-021965-08-15
19661966-06-201966-08-29
19671967-05-261967-07-30
19681968-06-041968-08-24
19691969-05-281969-08-30
19701970-05-211970-09-07
19711971-06-061971-09-28
19721972-05-181972-08-30
19731973-06-091973-09-02
19741974-07-021974-08-27
19751975-05-181975-08-24
19761976-06-061976-09-08
19771977-04-111977-08-28
19781978-05-261978-09-19
19791979-06-151979-08-31
19841984-06-061984-09-20
19851985-04-191985-09-20
19861986-05-311986-08-17
19871987-04-211987-08-16
19881988-05-291988-09-18
19891989-06-221989-08-27
19901990-04-241990-09-07
19911991-04-071991-09-10
19921992-05-021992-08-26
19931993-05-111993-08-28
19941994-04-191994-09-16
19951995-06-161995-08-31
19961996-05-181996-09-11
19971997-06-211997-10-08
19981998-05-151998-09-14
19991999-05-291999-09-05
20002000-06-092000-09-01
20012001-05-162001-08-10
20022002-04-162002-09-10
20032003-04-152003-09-12
20042004-06-082004-08-02
20052005-06-082005-09-22
20062006-05-292006-08-05
20072007-04-302007-09-25
20082008-06-272008-08-19
20092009-06-242009-08-15
20102010-05-242010-08-31
20112011-05-122011-09-13
20122012-05-202012-09-05
20132013-05-012013-09-11
20142014-06-012014-08-23
20152015-06-102015-09-07
20162016-05-072016-09-07
20172017-06-042017-09-26
20182018-05-252018-08-15
20192019-06-282019-07-20
20202020-05-272020-08-28
20212021-05-022021-09-20
20222022-05-112022-09-02
20232023-04-132023-10-02
20242024-05-192024-09-22
20252025-05-162025-10-05
20262026-05-172026-09-03

Every Fixed Threshold

Fixed thresholds at Montello Wwtp
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days6853198823
35 C (95 F): Days352019882
40 C (104 F): Days2119951
90 F (32.2 C): Days6441198812
100 F (37.8 C): Days5620121
0 C (32 F): Ice days (max6892197839
0 C (32 F): Frost days (min69183199693
-10 C (14 F): Days with min6990201436
-20 C (-4 F): Days with min6943196311
-30 C (-22 F): Days with min25719941
20 C (68 F): Tropical nights (min632019758
25 C (77 F): Days with min7219881
10 mm (0.39 in): Days with 10 mm or more rain6941196527
25 mm (0.98 in): Days with 25 mm or more rain6918201812
50 mm (1.97 in): Days with 50 mm or more rain46420041
100 mm (3.94 in): Days with 100 mm or more rain5219861
10 cm (3.9 in): Days with 10 cm or more snowfall50719772
25 cm (9.8 in): Days with 25 cm or more snowfall10119661

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1955.

Download the Data

  • Data for Montello Wwtp 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).