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Built 2026-10-19 (19 October 2026)

Alpena Wwtp Threshold Days by Year (USW00014814)

16 fixed thresholds counted per year at Alpena Wwtp (USW00014814): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Alpena Wwtp Thresholds

  • Alpena Wwtp: days with 10 mm (0.39 in) or more of precipitation in 74 years, most in 2019 with 36.
  • Alpena Wwtp: days with a maximum temperature at or above 30 C (86 F) in 73 years, most in 1988 with 24.
  • Alpena Wwtp: days with a maximum temperature at or below 0 C (32 F) in 73 years, most in 2014 with 90.
  • Alpena Wwtp: nights with a minimum temperature at or below 0 C (32 F) in 73 years, most in 2018 with 182.
  • 16 fixed thresholds have at least one qualifying day at Alpena Wwtp.
73 years with a qualifying day
Days at or above 30 C (86 F) per year at Alpena Wwtp Days per year at Alpena Wwtp with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 24 in 1988. 01020301948: 121949: 211950: 51951: 51952: 131953: 91954: 71955: 221956: 41957: 61958: 41959: 211960: 31961: 91962: 71963: 71964: 131965: 41966: 141967: 31968: 91969: 101970: 131971: 81972: 61973: 151974: 71975: 161976: 131977: 91978: 101979: 41980: 121981: 81982: 61983: 221984: 81985: 71986: 91987: 141988: 241991: 151993: 51995: 101996: 71998: 111999: 142000: 102001: 122002: 212004: 42005: 182006: 132007: 162008: 52009: 42010: 162011: 122012: 172013: 92014: 52015: 112016: 232017: 152018: 122019: 42020: 132021: 182022: 172023: 102024: 102025: 132026: 101948195619641972198019882001201020182026
Days per year at Alpena Wwtp with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 24 in 1988.
Days at or above 30 C (86 F) per year at Alpena Wwtp
YearDaysDecade average
19481216.5
19492116.5
195059.6
195159.6
1952139.6
195399.6
195479.6
1955229.6
195649.6
195769.6
195849.6
1959219.6
196037.9
196197.9
196277.9
196377.9
1964137.9
196547.9
1966147.9
196737.9
196897.9
1969107.9
19701310.1
1971810.1
1972610.1
19731510.1
1974710.1
19751610.1
19761310.1
1977910.1
19781010.1
1979410.1
19801212.2
1981812.2
1982612.2
19832212.2
1984812.2
1985712.2
1986912.2
19871412.2
19882412.2
19911510.3
1993510.3
19951010.3
1996710.3
19981110.3
19991410.3
20001011.4
20011211.4
20022111.4
2004411.4
20051811.4
20061311.4
20071611.4
2008511.4
2009411.4
20101612.4
20111212.4
20121712.4
2013912.4
2014512.4
20151112.4
20162312.4
20171512.4
20181212.4
2019412.4
20201313
20211813
20221713
20231013
20241013
20251313
20261013
First to last qualifying date each year at Alpena Wwtp For each year, a bar from the first to the last day at Alpena Wwtp meeting 30 C (86 F). 1948: 1 June 1948 to 17 September 19481949: 4 May 1949 to 4 September 19491950: 7 June 1950 to 12 July 19501951: 15 May 1951 to 29 July 19511952: 6 June 1952 to 11 September 19521953: 19 June 1953 to 3 September 19531954: 13 June 1954 to 2 September 19541955: 16 June 1955 to 18 September 19551956: 22 May 1956 to 14 June 19561957: 21 June 1957 to 2 September 19571958: 14 May 1958 to 9 August 19581959: 5 June 1959 to 9 September 19591960: 28 August 1960 to 7 September 19601961: 12 June 1961 to 11 September 19611962: 15 May 1962 to 29 August 19621963: 8 June 1963 to 28 July 19631964: 22 May 1964 to 28 July 19641965: 8 May 1965 to 14 August 19651966: 24 June 1966 to 29 August 19661967: 30 June 1967 to 16 August 19671968: 5 June 1968 to 24 August 19681969: 28 May 1969 to 31 August 19691970: 21 May 1970 to 15 August 19701971: 18 June 1971 to 1 October 19711972: 12 July 1972 to 22 August 19721973: 10 June 1973 to 4 September 19731974: 7 July 1974 to 22 August 19741975: 22 June 1975 to 13 August 19751976: 6 June 1976 to 7 September 19761977: 17 May 1977 to 28 August 19771978: 11 June 1978 to 22 August 19781979: 4 June 1979 to 7 August 19791980: 5 May 1980 to 25 August 19801981: 15 June 1981 to 23 August 19811982: 6 July 1982 to 19 August 19821983: 26 June 1983 to 10 September 19831984: 4 June 1984 to 15 August 19841985: 14 July 1985 to 3 September 19851986: 6 May 1986 to 24 July 19861987: 29 May 1987 to 25 July 19871988: 27 May 1988 to 14 August 19881991: 10 June 1991 to 30 August 19911993: 5 July 1993 to 27 August 19931995: 18 June 1995 to 23 August 19951996: 18 May 1996 to 7 August 19961998: 28 May 1998 to 20 September 19981999: 6 June 1999 to 30 July 19992000: 5 May 2000 to 31 August 20002001: 27 June 2001 to 9 August 20012002: 16 April 2002 to 1 October 20022004: 9 June 2004 to 12 September 20042005: 13 June 2005 to 14 September 20052006: 17 June 2006 to 3 August 20062007: 25 May 2007 to 6 September 20072008: 8 June 2008 to 24 August 20082009: 21 May 2009 to 16 August 20092010: 31 May 2010 to 1 September 20102011: 1 June 2011 to 3 September 20112012: 29 May 2012 to 13 September 20122013: 25 June 2013 to 11 September 20132014: 27 May 2014 to 23 July 20142015: 19 May 2015 to 7 September 20152016: 29 May 2016 to 20 September 20162017: 18 May 2017 to 25 September 20172018: 26 May 2018 to 6 September 20182019: 28 June 2019 to 6 August 20192020: 10 June 2020 to 24 August 20202021: 25 May 2021 to 29 August 20212022: 31 May 2022 to 19 August 20222023: 13 April 2023 to 18 August 20232024: 14 June 2024 to 28 August 20242025: 18 June 2025 to 12 August 20252026: 27 May 2026 to 5 August 202619481958196819781988200420142024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Alpena Wwtp meeting 30 C (86 F).
First to last qualifying date each year at Alpena Wwtp
YearFirst dateLast date
19481948-06-011948-09-17
19491949-05-041949-09-04
19501950-06-071950-07-12
19511951-05-151951-07-29
19521952-06-061952-09-11
19531953-06-191953-09-03
19541954-06-131954-09-02
19551955-06-161955-09-18
19561956-05-221956-06-14
19571957-06-211957-09-02
19581958-05-141958-08-09
19591959-06-051959-09-09
19601960-08-281960-09-07
19611961-06-121961-09-11
19621962-05-151962-08-29
19631963-06-081963-07-28
19641964-05-221964-07-28
19651965-05-081965-08-14
19661966-06-241966-08-29
19671967-06-301967-08-16
19681968-06-051968-08-24
19691969-05-281969-08-31
19701970-05-211970-08-15
19711971-06-181971-10-01
19721972-07-121972-08-22
19731973-06-101973-09-04
19741974-07-071974-08-22
19751975-06-221975-08-13
19761976-06-061976-09-07
19771977-05-171977-08-28
19781978-06-111978-08-22
19791979-06-041979-08-07
19801980-05-051980-08-25
19811981-06-151981-08-23
19821982-07-061982-08-19
19831983-06-261983-09-10
19841984-06-041984-08-15
19851985-07-141985-09-03
19861986-05-061986-07-24
19871987-05-291987-07-25
19881988-05-271988-08-14
19911991-06-101991-08-30
19931993-07-051993-08-27
19951995-06-181995-08-23
19961996-05-181996-08-07
19981998-05-281998-09-20
19991999-06-061999-07-30
20002000-05-052000-08-31
20012001-06-272001-08-09
20022002-04-162002-10-01
20042004-06-092004-09-12
20052005-06-132005-09-14
20062006-06-172006-08-03
20072007-05-252007-09-06
20082008-06-082008-08-24
20092009-05-212009-08-16
20102010-05-312010-09-01
20112011-06-012011-09-03
20122012-05-292012-09-13
20132013-06-252013-09-11
20142014-05-272014-07-23
20152015-05-192015-09-07
20162016-05-292016-09-20
20172017-05-182017-09-25
20182018-05-262018-09-06
20192019-06-282019-08-06
20202020-06-102020-08-24
20212021-05-252021-08-29
20222022-05-312022-08-19
20232023-04-132023-08-18
20242024-06-142024-08-28
20252025-06-182025-08-12
20262026-05-272026-08-05

Every Fixed Threshold

Fixed thresholds at Alpena Wwtp
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days7324198810
35 C (95 F): Days30719551
90 F (32.2 C): Days611619883
100 F (37.8 C): Days4219881
0 C (32 F): Ice days (max7390201456
0 C (32 F): Frost days (min731822018101
-10 C (14 F): Days with min7374196339
-20 C (-4 F): Days with min572119634
-30 C (-22 F): Days with min1219792
20 C (68 F): Tropical nights (min681920167
25 C (77 F): Days with min1119911
10 mm (0.39 in): Days with 10 mm or more rain7436201928
25 mm (0.98 in): Days with 25 mm or more rain709197810
50 mm (1.97 in): Days with 50 mm or more rain27219651
10 cm (3.9 in): Days with 10 cm or more snowfall64919704
25 cm (9.8 in): Days with 25 cm or more snowfall15219661

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1948.

Download the Data

  • Data for Alpena 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 (2026-10-12).