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Built 2026-10-19 (19 October 2026)

Hillsboro Threshold Days by Year (USC00414182)

20 fixed thresholds counted per year at Hillsboro (USC00414182): 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 117 years, most in 1914 with 41.
  • Hillsboro: days with 25 mm (0.98 in) or more of precipitation in 117 years, most in 2024 with 23.
  • Hillsboro: nights with a minimum temperature at or below 0 C (32 F) in 112 years, most in 1924 with 70.
  • Hillsboro: nights with a minimum temperature at or above 20 C (68 F) in 112 years, most in 2018 with 142.
  • 20 fixed thresholds have at least one qualifying day at Hillsboro.
103 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 186 in 1911. 0501001502001904: 1521905: 1361906: 1281910: 1631911: 1861912: 1591913: 1431914: 1221915: 1401916: 1661917: 1561918: 1531919: 1261920: 1421921: 1501922: 1411923: 1461924: 1421925: 1571926: 1411927: 1701928: 1571929: 1431930: 1391931: 1491932: 1341933: 1711934: 1751935: 1341936: 1591937: 1631938: 1541939: 1591940: 1421941: 1431942: 1261943: 1421944: 1271945: 1271946: 1171947: 1571952: 1431953: 1431954: 1551956: 1491957: 1211958: 1201959: 1351960: 1421961: 1241962: 1511963: 1761964: 1241965: 1211966: 1151967: 1351968: 1211969: 1341970: 1121971: 1231972: 1461973: 1261974: 1041975: 881976: 1041977: 1491978: 1491979: 1231980: 1291981: 1521984: 1361986: 1211987: 1221988: 1331989: 1281990: 1381991: 1321992: 1141993: 1221994: 1291995: 1292001: 1132005: 1402006: 1472008: 1382009: 1292010: 1502011: 1712012: 1522013: 1292014: 1372015: 1372016: 1372017: 1442018: 1482019: 1422020: 1352021: 1362022: 1642023: 1522024: 1532025: 1572026: 1621904191819291940195619671978199220122023
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 186 in 1911.
Days at or above 30 C (86 F) per year at Hillsboro
YearDaysDecade average
1904152138.7
1905136138.7
1906128138.7
1910163151.4
1911186151.4
1912159151.4
1913143151.4
1914122151.4
1915140151.4
1916166151.4
1917156151.4
1918153151.4
1919126151.4
1920142148.9
1921150148.9
1922141148.9
1923146148.9
1924142148.9
1925157148.9
1926141148.9
1927170148.9
1928157148.9
1929143148.9
1930139153.7
1931149153.7
1932134153.7
1933171153.7
1934175153.7
1935134153.7
1936159153.7
1937163153.7
1938154153.7
1939159153.7
1940142135.1
1941143135.1
1942126135.1
1943142135.1
1944127135.1
1945127135.1
1946117135.1
1947157135.1
1952143138
1953143138
1954155138
1956149138
1957121138
1958120138
1959135138
1960142134.3
1961124134.3
1962151134.3
1963176134.3
1964124134.3
1965121134.3
1966115134.3
1967135134.3
1968121134.3
1969134134.3
1970112122.4
1971123122.4
1972146122.4
1973126122.4
1974104122.4
197588122.4
1976104122.4
1977149122.4
1978149122.4
1979123122.4
1980129131.6
1981152131.6
1984136131.6
1986121131.6
1987122131.6
1988133131.6
1989128131.6
1990138127.3
1991132127.3
1992114127.3
1993122127.3
1994129127.3
1995129127.3
2001113133.4
2005140133.4
2006147133.4
2008138133.4
2009129133.4
2010150144.7
2011171144.7
2012152144.7
2013129144.7
2014137144.7
2015137144.7
2016137144.7
2017144144.7
2018148144.7
2019142144.7
2020135151.3
2021136151.3
2022164151.3
2023152151.3
2024153151.3
2025157151.3
2026162151.3
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). 1904: 25 February 1904 to 18 October 19041905: 8 April 1905 to 18 October 19051906: 26 March 1906 to 9 November 19061910: 7 March 1910 to 27 October 19101911: 1 February 1911 to 12 November 19111912: 20 March 1912 to 31 October 19121913: 30 March 1913 to 10 October 19131914: 14 April 1914 to 9 October 19141915: 28 April 1915 to 8 November 19151916: 5 March 1916 to 1 November 19161917: 21 February 1917 to 10 November 19171918: 24 February 1918 to 20 October 19181919: 12 April 1919 to 27 October 19191920: 16 March 1920 to 19 October 19201921: 17 March 1921 to 17 November 19211922: 10 February 1922 to 3 November 19221923: 7 April 1923 to 11 October 19231924: 8 April 1924 to 2 November 19241925: 25 March 1925 to 23 October 19251926: 18 April 1926 to 19 October 19261927: 6 January 1927 to 11 November 19271928: 12 March 1928 to 27 October 19281929: 6 March 1929 to 19 October 19291930: 22 February 1930 to 16 October 19301931: 2 April 1931 to 26 October 19311932: 28 February 1932 to 7 November 19321933: 23 February 1933 to 14 November 19331934: 22 March 1934 to 10 November 19341935: 19 March 1935 to 21 October 19351936: 14 March 1936 to 20 October 19361937: 15 April 1937 to 31 October 19371938: 4 March 1938 to 31 October 19381939: 31 March 1939 to 27 October 19391940: 28 March 1940 to 24 October 19401941: 6 May 1941 to 25 October 19411942: 12 March 1942 to 14 October 19421943: 22 January 1943 to 31 October 19431944: 12 May 1944 to 6 November 19441945: 25 April 1945 to 6 November 19451946: 29 March 1946 to 24 October 19461947: 1 April 1947 to 31 October 19471952: 20 March 1952 to 28 October 19521953: 9 April 1953 to 18 October 19531954: 10 February 1954 to 26 October 19541956: 27 March 1956 to 13 October 19561957: 10 February 1957 to 7 October 19571958: 5 April 1958 to 25 October 19581959: 18 February 1959 to 25 October 19591960: 10 February 1960 to 14 October 19601961: 15 April 1961 to 22 October 19611962: 9 February 1962 to 17 October 19621963: 2 February 1963 to 8 November 19631964: 4 April 1964 to 18 October 19641965: 19 April 1965 to 25 November 19651966: 4 April 1966 to 15 October 19661967: 12 March 1967 to 7 October 19671968: 4 May 1968 to 30 October 19681969: 21 May 1969 to 9 November 19691970: 11 May 1970 to 8 October 19701971: 14 March 1971 to 19 October 19711972: 8 March 1972 to 19 October 19721973: 10 May 1973 to 11 October 19731974: 31 March 1974 to 19 October 19741975: 25 April 1975 to 23 October 19751976: 5 March 1976 to 11 October 19761977: 12 April 1977 to 31 October 19771978: 4 April 1978 to 22 October 19781979: 8 April 1979 to 22 October 19791980: 20 February 1980 to 9 November 19801981: 30 March 1981 to 17 October 19811984: 27 March 1984 to 18 October 19841986: 18 February 1986 to 4 October 19861987: 11 April 1987 to 4 November 19871988: 20 April 1988 to 7 November 19881989: 14 March 1989 to 17 October 19891990: 29 April 1990 to 17 October 19901991: 5 March 1991 to 25 October 19911992: 24 April 1992 to 26 October 19921993: 15 May 1993 to 17 October 19931994: 26 April 1994 to 7 October 19941995: 22 March 1995 to 26 October 19952001: 16 May 2001 to 23 October 20012005: 29 April 2005 to 4 December 20052006: 2 March 2006 to 27 October 20062008: 15 March 2008 to 14 October 20082009: 10 April 2009 to 15 October 20092010: 5 May 2010 to 22 December 20102011: 19 March 2011 to 27 October 20112012: 2 April 2012 to 3 November 20122013: 17 April 2013 to 18 November 20132014: 24 April 2014 to 27 October 20142015: 26 April 2015 to 12 November 20152016: 15 March 2016 to 17 November 20162017: 8 February 2017 to 7 November 20172018: 25 March 2018 to 29 October 20182019: 5 April 2019 to 21 October 20192020: 25 March 2020 to 22 October 20202021: 10 April 2021 to 28 October 20212022: 27 March 2022 to 30 November 20222023: 1 March 2023 to 28 October 20232024: 27 February 2024 to 31 December 20242025: 9 February 2025 to 19 November 20252026: 7 February 2026 to 15 October 202619041920193319461964197719932015JanFebMarAprMayJunJulAugSepOctNovDec
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
19041904-02-251904-10-18
19051905-04-081905-10-18
19061906-03-261906-11-09
19101910-03-071910-10-27
19111911-02-011911-11-12
19121912-03-201912-10-31
19131913-03-301913-10-10
19141914-04-141914-10-09
19151915-04-281915-11-08
19161916-03-051916-11-01
19171917-02-211917-11-10
19181918-02-241918-10-20
19191919-04-121919-10-27
19201920-03-161920-10-19
19211921-03-171921-11-17
19221922-02-101922-11-03
19231923-04-071923-10-11
19241924-04-081924-11-02
19251925-03-251925-10-23
19261926-04-181926-10-19
19271927-01-061927-11-11
19281928-03-121928-10-27
19291929-03-061929-10-19
19301930-02-221930-10-16
19311931-04-021931-10-26
19321932-02-281932-11-07
19331933-02-231933-11-14
19341934-03-221934-11-10
19351935-03-191935-10-21
19361936-03-141936-10-20
19371937-04-151937-10-31
19381938-03-041938-10-31
19391939-03-311939-10-27
19401940-03-281940-10-24
19411941-05-061941-10-25
19421942-03-121942-10-14
19431943-01-221943-10-31
19441944-05-121944-11-06
19451945-04-251945-11-06
19461946-03-291946-10-24
19471947-04-011947-10-31
19521952-03-201952-10-28
19531953-04-091953-10-18
19541954-02-101954-10-26
19561956-03-271956-10-13
19571957-02-101957-10-07
19581958-04-051958-10-25
19591959-02-181959-10-25
19601960-02-101960-10-14
19611961-04-151961-10-22
19621962-02-091962-10-17
19631963-02-021963-11-08
19641964-04-041964-10-18
19651965-04-191965-11-25
19661966-04-041966-10-15
19671967-03-121967-10-07
19681968-05-041968-10-30
19691969-05-211969-11-09
19701970-05-111970-10-08
19711971-03-141971-10-19
19721972-03-081972-10-19
19731973-05-101973-10-11
19741974-03-311974-10-19
19751975-04-251975-10-23
19761976-03-051976-10-11
19771977-04-121977-10-31
19781978-04-041978-10-22
19791979-04-081979-10-22
19801980-02-201980-11-09
19811981-03-301981-10-17
19841984-03-271984-10-18
19861986-02-181986-10-04
19871987-04-111987-11-04
19881988-04-201988-11-07
19891989-03-141989-10-17
19901990-04-291990-10-17
19911991-03-051991-10-25
19921992-04-241992-10-26
19931993-05-151993-10-17
19941994-04-261994-10-07
19951995-03-221995-10-26
20012001-05-162001-10-23
20052005-04-292005-12-04
20062006-03-022006-10-27
20082008-03-152008-10-14
20092009-04-102009-10-15
20102010-05-052010-12-22
20112011-03-192011-10-27
20122012-04-022012-11-03
20132013-04-172013-11-18
20142014-04-242014-10-27
20152015-04-262015-11-12
20162016-03-152016-11-17
20172017-02-082017-11-07
20182018-03-252018-10-29
20192019-04-052019-10-21
20202020-03-252020-10-22
20212021-04-102021-10-28
20222022-03-272022-11-30
20232023-03-012023-10-28
20242024-02-272024-12-31
20252025-02-092025-11-19
20262026-02-072026-10-15

Every Fixed Threshold

Fixed thresholds at Hillsboro
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1031861911162
35 C (95 F): Days103129191191
40 C (104 F): Days6639202316
45 C (113 F): Days1119171
90 F (32.2 C): Days1031611911130
100 F (37.8 C): Days9581201160
110 F (43.3 C): Days12620231
0 C (32 F): Ice days (max721019051
0 C (32 F): Frost days (min11270192424
-10 C (14 F): Days with min591019632
-20 C (-4 F): Days with min1119891
20 C (68 F): Tropical nights (min1121422018135
25 C (77 F): Days with min10264201160
10 mm (0.39 in): Days with 10 mm or more rain11741191419
25 mm (0.98 in): Days with 25 mm or more rain1172320247
50 mm (1.97 in): Days with 50 mm or more rain1111019382
100 mm (3.94 in): Days with 100 mm or more rain35219761
200 mm (7.87 in): Days with 200 mm or more rain3119351
10 cm (3.9 in): Days with 10 cm or more snowfall9219291
25 cm (9.8 in): Days with 25 cm or more snowfall2219292

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1904.

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).