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Built 2026-10-19 (19 October 2026)

Hillsboro Threshold Days by Year (USC00294009)

16 fixed thresholds counted per year at Hillsboro (USC00294009): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hillsboro Thresholds

  • Hillsboro: days with 10 mm (0.39 in) or more of precipitation in 104 years, most in 1990 with 19.
  • Hillsboro: days with 25 mm (0.98 in) or more of precipitation in 85 years, most in 1969 with 5.
  • Hillsboro: days with a maximum temperature at or above 30 C (86 F) in 77 years, most in 2012 with 146.
  • Hillsboro: days with a maximum temperature at or above 35 C (95 F) in 77 years, most in 2011 with 76.
  • 16 fixed thresholds have at least one qualifying day at Hillsboro.
77 years with a qualifying day
Days at or above 30 C (86 F) per year at Hillsboro Days per year at Hillsboro with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 146 in 2012. 0501001501896: 1091897: 941899: 861900: 851907: 711908: 581909: 881954: 1221955: 971956: 1271957: 841958: 1051959: 1071960: 1101961: 1001962: 991963: 1021964: 1051965: 941966: 1051967: 721968: 871969: 1061970: 1031971: 1021972: 771973: 1011974: 981975: 821976: 841977: 981978: 1021979: 961980: 1001981: 931982: 1111983: 1031984: 881985: 881986: 701987: 751988: 701989: 1141990: 841991: 611992: 931993: 841994: 1131995: 971996: 1161999: 842001: 1152002: 1192003: 1252004: 942005: 1102006: 962007: 1112008: 852009: 1172010: 1172011: 1322012: 1462013: 1132014: 1012015: 1122016: 982017: 1172018: 1252019: 1202020: 1382021: 1122022: 1092023: 1252024: 1292025: 1142026: 1331896195519631971197919871995200620142022
Days per year at Hillsboro with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 146 in 2012.
Days at or above 30 C (86 F) per year at Hillsboro
YearDaysDecade average
189610996.3
18979496.3
18998696.3
19008575.5
19077175.5
19085875.5
19098875.5
1954122107
195597107
1956127107
195784107
1958105107
1959107107
196011098
196110098
19629998
196310298
196410598
19659498
196610598
19677298
19688798
196910698
197010394.3
197110294.3
19727794.3
197310194.3
19749894.3
19758294.3
19768494.3
19779894.3
197810294.3
19799694.3
198010091.2
19819391.2
198211191.2
198310391.2
19848891.2
19858891.2
19867091.2
19877591.2
19887091.2
198911491.2
19908491.5
19916191.5
19929391.5
19938491.5
199411391.5
19959791.5
199611691.5
19998491.5
2001115108
2002119108
2003125108
200494108
2005110108
200696108
2007111108
200885108
2009117108
2010117118.1
2011132118.1
2012146118.1
2013113118.1
2014101118.1
2015112118.1
201698118.1
2017117118.1
2018125118.1
2019120118.1
2020138122.9
2021112122.9
2022109122.9
2023125122.9
2024129122.9
2025114122.9
2026133122.9
First to last qualifying date each year at Hillsboro For each year, a bar from the first to the last day at Hillsboro meeting 30 C (86 F). 1896: 21 March 1896 to 17 September 18961897: 6 May 1897 to 8 September 18971899: 16 May 1899 to 21 September 18991900: 24 March 1900 to 17 September 19001907: 19 March 1907 to 25 September 19071908: 30 May 1908 to 25 September 19081909: 7 May 1909 to 22 October 19091954: 5 April 1954 to 30 September 19541955: 6 May 1955 to 30 September 19551956: 3 May 1956 to 6 October 19561957: 13 April 1957 to 26 September 19571958: 21 April 1958 to 21 September 19581959: 2 April 1959 to 25 October 19591960: 8 April 1960 to 29 September 19601961: 22 April 1961 to 6 October 19611962: 16 April 1962 to 14 October 19621963: 28 March 1963 to 13 October 19631964: 14 May 1964 to 1 October 19641965: 20 April 1965 to 14 October 19651966: 8 May 1966 to 26 September 19661967: 8 May 1967 to 13 September 19671968: 20 May 1968 to 14 October 19681969: 22 April 1969 to 9 October 19691970: 11 May 1970 to 24 September 19701971: 26 March 1971 to 28 September 19711972: 6 April 1972 to 10 October 19721973: 10 May 1973 to 23 October 19731974: 24 April 1974 to 12 September 19741975: 12 May 1975 to 17 September 19751976: 12 May 1976 to 13 September 19761977: 23 May 1977 to 30 September 19771978: 11 May 1978 to 12 October 19781979: 28 April 1979 to 26 October 19791980: 20 May 1980 to 5 October 19801981: 30 April 1981 to 30 September 19811982: 11 April 1982 to 5 October 19821983: 22 May 1983 to 19 September 19831984: 9 May 1984 to 18 September 19841985: 24 May 1985 to 13 September 19851986: 1 May 1986 to 22 September 19861987: 1 June 1987 to 8 October 19871988: 13 May 1988 to 18 September 19881989: 11 March 1989 to 14 October 19891990: 14 April 1990 to 13 September 19901991: 18 May 1991 to 17 October 19911992: 28 April 1992 to 25 September 19921993: 22 April 1993 to 4 October 19931994: 5 May 1994 to 30 September 19941995: 15 May 1995 to 28 September 19951996: 24 April 1996 to 12 October 19961999: 8 May 1999 to 4 October 19992001: 1 May 2001 to 20 October 20012002: 1 April 2002 to 26 September 20022003: 12 May 2003 to 20 October 20032004: 4 May 2004 to 17 September 20042005: 19 May 2005 to 5 October 20052006: 13 April 2006 to 3 October 20062007: 20 May 2007 to 20 October 20072008: 29 April 2008 to 7 September 20082009: 22 April 2009 to 14 October 20092010: 4 May 2010 to 2 October 20102011: 2 April 2011 to 17 October 20112012: 18 April 2012 to 20 October 20122013: 22 April 2013 to 25 September 20132014: 9 April 2014 to 11 September 20142015: 1 May 2015 to 15 October 20152016: 5 May 2016 to 18 October 20162017: 18 April 2017 to 13 October 20172018: 11 April 2018 to 4 October 20182019: 9 April 2019 to 30 September 20192020: 26 April 2020 to 21 October 20202021: 5 April 2021 to 8 October 20212022: 18 April 2022 to 23 September 20222023: 30 April 2023 to 20 October 20232024: 19 April 2024 to 27 October 20242025: 11 April 2025 to 4 October 20252026: 19 March 2026 to 21 September 202618961957196719771987199920102020JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Hillsboro meeting 30 C (86 F).
First to last qualifying date each year at Hillsboro
YearFirst dateLast date
18961896-03-211896-09-17
18971897-05-061897-09-08
18991899-05-161899-09-21
19001900-03-241900-09-17
19071907-03-191907-09-25
19081908-05-301908-09-25
19091909-05-071909-10-22
19541954-04-051954-09-30
19551955-05-061955-09-30
19561956-05-031956-10-06
19571957-04-131957-09-26
19581958-04-211958-09-21
19591959-04-021959-10-25
19601960-04-081960-09-29
19611961-04-221961-10-06
19621962-04-161962-10-14
19631963-03-281963-10-13
19641964-05-141964-10-01
19651965-04-201965-10-14
19661966-05-081966-09-26
19671967-05-081967-09-13
19681968-05-201968-10-14
19691969-04-221969-10-09
19701970-05-111970-09-24
19711971-03-261971-09-28
19721972-04-061972-10-10
19731973-05-101973-10-23
19741974-04-241974-09-12
19751975-05-121975-09-17
19761976-05-121976-09-13
19771977-05-231977-09-30
19781978-05-111978-10-12
19791979-04-281979-10-26
19801980-05-201980-10-05
19811981-04-301981-09-30
19821982-04-111982-10-05
19831983-05-221983-09-19
19841984-05-091984-09-18
19851985-05-241985-09-13
19861986-05-011986-09-22
19871987-06-011987-10-08
19881988-05-131988-09-18
19891989-03-111989-10-14
19901990-04-141990-09-13
19911991-05-181991-10-17
19921992-04-281992-09-25
19931993-04-221993-10-04
19941994-05-051994-09-30
19951995-05-151995-09-28
19961996-04-241996-10-12
19991999-05-081999-10-04
20012001-05-012001-10-20
20022002-04-012002-09-26
20032003-05-122003-10-20
20042004-05-042004-09-17
20052005-05-192005-10-05
20062006-04-132006-10-03
20072007-05-202007-10-20
20082008-04-292008-09-07
20092009-04-222009-10-14
20102010-05-042010-10-02
20112011-04-022011-10-17
20122012-04-182012-10-20
20132013-04-222013-09-25
20142014-04-092014-09-11
20152015-05-012015-10-15
20162016-05-052016-10-18
20172017-04-182017-10-13
20182018-04-112018-10-04
20192019-04-092019-09-30
20202020-04-262020-10-21
20212021-04-052021-10-08
20222022-04-182022-09-23
20232023-04-302023-10-20
20242024-04-192024-10-27
20252025-04-112025-10-04
20262026-03-192026-09-21

Every Fixed Threshold

Fixed thresholds at Hillsboro
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days771462012133
35 C (95 F): Days7776201168
40 C (104 F): Days20519941
90 F (32.2 C): Days771062011110
100 F (37.8 C): Days6026202324
0 C (32 F): Ice days (max23619091
0 C (32 F): Frost days (min76133190043
-10 C (14 F): Days with min7323196410
-20 C (-4 F): Days with min3220112
20 C (68 F): Tropical nights (min7016190032
25 C (77 F): Days with min6119091
10 mm (0.39 in): Days with 10 mm or more rain1041919907
25 mm (0.98 in): Days with 25 mm or more rain85519691
50 mm (1.97 in): Days with 50 mm or more rain20219251
10 cm (3.9 in): Days with 10 cm or more snowfall31419872
25 cm (9.8 in): Days with 25 cm or more snowfall7219872

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1896.

Download the Data

  • Data for Hillsboro 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).