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

Portland Threshold Days by Year (USC00035866)

18 fixed thresholds counted per year at Portland (USC00035866): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Portland Thresholds

  • Portland: days with 10 mm (0.39 in) or more of precipitation in 108 years, most in 1975 with 64.
  • Portland: days with 25 mm (0.98 in) or more of precipitation in 108 years, most in 1975 with 31.
  • Portland: days with a maximum temperature at or above 30 C (86 F) in 106 years, most in 1998 with 169.
  • Portland: days with a maximum temperature at or above 90 F (32.2 C) in 106 years, most in 1998 with 138.
  • 18 fixed thresholds have at least one qualifying day at Portland.
106 years with a qualifying day
Days at or above 30 C (86 F) per year at Portland Days per year at Portland with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 169 in 1998. 0501001502001910: 1381911: 1291912: 1141913: 1321914: 1351915: 1401916: 1231917: 1041918: 1311919: 1161920: 1281921: 1391922: 1371923: 1061924: 1181925: 1561926: 1351927: 1541928: 1281929: 1271930: 1231931: 1251932: 1231933: 1321934: 1371935: 1241936: 1431937: 1331938: 1401939: 1401940: 971941: 1291942: 1221943: 1301944: 1321945: 1041946: 971947: 1121948: 1341949: 1081950: 801951: 1191952: 1281953: 1351954: 1251955: 1191956: 1171957: 911958: 971959: 1131960: 1071961: 831962: 1091963: 1001964: 921965: 1121966: 931967: 831973: 1241974: 941975: 991976: 941977: 1261979: 1041981: 1221982: 1391983: 1111984: 1251985: 1331986: 1351987: 1441988: 1231989: 1141990: 1301991: 1281992: 1131993: 1311994: 1371995: 1401996: 1291997: 1311998: 1691999: 1442000: 1362001: 1342002: 1542003: 1312006: 1272007: 1232008: 1042009: 922010: 1452011: 1232012: 1202013: 1112014: 992017: 1042018: 1332019: 1312020: 1202021: 1082022: 1242023: 1352024: 1312025: 1282026: 791910192119321943195419651983199420072020
Days per year at Portland with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 169 in 1998.
Days at or above 30 C (86 F) per year at Portland
YearDaysDecade average
1910138126.2
1911129126.2
1912114126.2
1913132126.2
1914135126.2
1915140126.2
1916123126.2
1917104126.2
1918131126.2
1919116126.2
1920128132.8
1921139132.8
1922137132.8
1923106132.8
1924118132.8
1925156132.8
1926135132.8
1927154132.8
1928128132.8
1929127132.8
1930123132
1931125132
1932123132
1933132132
1934137132
1935124132
1936143132
1937133132
1938140132
1939140132
194097116.5
1941129116.5
1942122116.5
1943130116.5
1944132116.5
1945104116.5
194697116.5
1947112116.5
1948134116.5
1949108116.5
195080112.4
1951119112.4
1952128112.4
1953135112.4
1954125112.4
1955119112.4
1956117112.4
195791112.4
195897112.4
1959113112.4
196010797.4
19618397.4
196210997.4
196310097.4
19649297.4
196511297.4
19669397.4
19678397.4
1973124106.8
197494106.8
197599106.8
197694106.8
1977126106.8
1979104106.8
1981122127.3
1982139127.3
1983111127.3
1984125127.3
1985133127.3
1986135127.3
1987144127.3
1988123127.3
1989114127.3
1990130135.2
1991128135.2
1992113135.2
1993131135.2
1994137135.2
1995140135.2
1996129135.2
1997131135.2
1998169135.2
1999144135.2
2000136125.1
2001134125.1
2002154125.1
2003131125.1
2006127125.1
2007123125.1
2008104125.1
200992125.1
2010145120.8
2011123120.8
2012120120.8
2013111120.8
201499120.8
2017104120.8
2018133120.8
2019131120.8
2020120117.9
2021108117.9
2022124117.9
2023135117.9
2024131117.9
2025128117.9
202679117.9
First to last qualifying date each year at Portland For each year, a bar from the first to the last day at Portland meeting 30 C (86 F). 1910: 4 March 1910 to 19 October 19101911: 7 March 1911 to 6 October 19111912: 8 May 1912 to 11 October 19121913: 31 March 1913 to 13 October 19131914: 16 April 1914 to 6 November 19141915: 10 April 1915 to 29 October 19151916: 9 May 1916 to 16 October 19161917: 28 April 1917 to 18 October 19171918: 25 February 1918 to 7 October 19181919: 23 April 1919 to 27 October 19191920: 16 April 1920 to 21 October 19201921: 18 March 1921 to 25 October 19211922: 21 February 1922 to 30 October 19221923: 22 March 1923 to 8 October 19231924: 16 April 1924 to 17 October 19241925: 6 March 1925 to 13 October 19251926: 22 April 1926 to 19 October 19261927: 16 February 1927 to 1 November 19271928: 25 March 1928 to 15 October 19281929: 23 March 1929 to 30 September 19291930: 7 April 1930 to 2 October 19301931: 16 April 1931 to 27 October 19311932: 6 April 1932 to 25 October 19321933: 14 March 1933 to 21 October 19331934: 3 April 1934 to 24 October 19341935: 22 March 1935 to 22 October 19351936: 1 April 1936 to 21 October 19361937: 15 April 1937 to 31 October 19371938: 29 April 1938 to 16 October 19381939: 23 March 1939 to 26 October 19391940: 1 April 1940 to 29 October 19401941: 12 April 1941 to 23 October 19411942: 27 May 1942 to 18 October 19421943: 28 April 1943 to 11 October 19431944: 11 May 1944 to 30 October 19441945: 3 April 1945 to 1 October 19451946: 30 March 1946 to 10 October 19461947: 4 May 1947 to 21 October 19471948: 21 March 1948 to 10 October 19481949: 26 April 1949 to 12 October 19491950: 16 January 1950 to 22 September 19501951: 2 May 1951 to 19 October 19511952: 30 April 1952 to 6 October 19521953: 19 March 1953 to 23 October 19531954: 8 April 1954 to 12 October 19541955: 12 March 1955 to 15 November 19551956: 29 April 1956 to 7 October 19561957: 3 April 1957 to 22 September 19571958: 14 May 1958 to 27 September 19581959: 20 April 1959 to 11 October 19591960: 6 April 1960 to 4 October 19601961: 26 May 1961 to 30 September 19611962: 8 May 1962 to 15 October 19621963: 2 April 1963 to 22 September 19631964: 6 June 1964 to 27 September 19641965: 10 April 1965 to 18 October 19651966: 31 March 1966 to 9 October 19661967: 12 March 1967 to 15 October 19671973: 11 May 1973 to 12 October 19731974: 1 April 1974 to 13 October 19741975: 28 April 1975 to 14 October 19751976: 13 May 1976 to 5 October 19761977: 8 May 1977 to 2 October 19771979: 9 May 1979 to 22 October 19791981: 10 April 1981 to 17 October 19811982: 16 April 1982 to 9 October 19821983: 13 May 1983 to 19 October 19831984: 6 May 1984 to 1 November 19841985: 18 April 1985 to 18 October 19851986: 26 February 1986 to 5 October 19861987: 18 April 1987 to 11 October 19871988: 9 May 1988 to 30 September 19881989: 22 April 1989 to 15 October 19891990: 23 April 1990 to 8 October 19901991: 12 May 1991 to 23 October 19911992: 14 April 1992 to 26 October 19921993: 4 May 1993 to 19 October 19931994: 20 April 1994 to 8 October 19941995: 22 March 1995 to 19 October 19951996: 19 April 1996 to 27 October 19961997: 28 March 1997 to 21 October 19971998: 30 March 1998 to 5 November 19981999: 9 April 1999 to 10 November 19992000: 19 April 2000 to 5 October 20002001: 10 April 2001 to 25 October 20012002: 18 April 2002 to 7 October 20022003: 18 April 2003 to 26 October 20032006: 8 April 2006 to 19 October 20062007: 4 April 2007 to 19 October 20072008: 11 April 2008 to 16 October 20082009: 23 April 2009 to 9 October 20092010: 4 May 2010 to 28 October 20102011: 27 March 2011 to 18 October 20112012: 1 May 2012 to 29 September 20122013: 19 April 2013 to 6 October 20132014: 5 May 2014 to 11 October 20142017: 29 April 2017 to 22 October 20172018: 3 May 2018 to 15 October 20182019: 16 May 2019 to 11 October 20192020: 29 March 2020 to 25 October 20202021: 5 May 2021 to 25 October 20212022: 2 May 2022 to 16 October 20222023: 7 May 2023 to 30 October 20232024: 28 April 2024 to 5 November 20242025: 3 April 2025 to 19 October 20252026: 18 April 2026 to 24 August 202619101924193819521966198720012019JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Portland meeting 30 C (86 F).
First to last qualifying date each year at Portland
YearFirst dateLast date
19101910-03-041910-10-19
19111911-03-071911-10-06
19121912-05-081912-10-11
19131913-03-311913-10-13
19141914-04-161914-11-06
19151915-04-101915-10-29
19161916-05-091916-10-16
19171917-04-281917-10-18
19181918-02-251918-10-07
19191919-04-231919-10-27
19201920-04-161920-10-21
19211921-03-181921-10-25
19221922-02-211922-10-30
19231923-03-221923-10-08
19241924-04-161924-10-17
19251925-03-061925-10-13
19261926-04-221926-10-19
19271927-02-161927-11-01
19281928-03-251928-10-15
19291929-03-231929-09-30
19301930-04-071930-10-02
19311931-04-161931-10-27
19321932-04-061932-10-25
19331933-03-141933-10-21
19341934-04-031934-10-24
19351935-03-221935-10-22
19361936-04-011936-10-21
19371937-04-151937-10-31
19381938-04-291938-10-16
19391939-03-231939-10-26
19401940-04-011940-10-29
19411941-04-121941-10-23
19421942-05-271942-10-18
19431943-04-281943-10-11
19441944-05-111944-10-30
19451945-04-031945-10-01
19461946-03-301946-10-10
19471947-05-041947-10-21
19481948-03-211948-10-10
19491949-04-261949-10-12
19501950-01-161950-09-22
19511951-05-021951-10-19
19521952-04-301952-10-06
19531953-03-191953-10-23
19541954-04-081954-10-12
19551955-03-121955-11-15
19561956-04-291956-10-07
19571957-04-031957-09-22
19581958-05-141958-09-27
19591959-04-201959-10-11
19601960-04-061960-10-04
19611961-05-261961-09-30
19621962-05-081962-10-15
19631963-04-021963-09-22
19641964-06-061964-09-27
19651965-04-101965-10-18
19661966-03-311966-10-09
19671967-03-121967-10-15
19731973-05-111973-10-12
19741974-04-011974-10-13
19751975-04-281975-10-14
19761976-05-131976-10-05
19771977-05-081977-10-02
19791979-05-091979-10-22
19811981-04-101981-10-17
19821982-04-161982-10-09
19831983-05-131983-10-19
19841984-05-061984-11-01
19851985-04-181985-10-18
19861986-02-261986-10-05
19871987-04-181987-10-11
19881988-05-091988-09-30
19891989-04-221989-10-15
19901990-04-231990-10-08
19911991-05-121991-10-23
19921992-04-141992-10-26
19931993-05-041993-10-19
19941994-04-201994-10-08
19951995-03-221995-10-19
19961996-04-191996-10-27
19971997-03-281997-10-21
19981998-03-301998-11-05
19991999-04-091999-11-10
20002000-04-192000-10-05
20012001-04-102001-10-25
20022002-04-182002-10-07
20032003-04-182003-10-26
20062006-04-082006-10-19
20072007-04-042007-10-19
20082008-04-112008-10-16
20092009-04-232009-10-09
20102010-05-042010-10-28
20112011-03-272011-10-18
20122012-05-012012-09-29
20132013-04-192013-10-06
20142014-05-052014-10-11
20172017-04-292017-10-22
20182018-05-032018-10-15
20192019-05-162019-10-11
20202020-03-292020-10-25
20212021-05-052021-10-25
20222022-05-022022-10-16
20232023-05-072023-10-30
20242024-04-282024-11-05
20252025-04-032025-10-19
20262026-04-182026-08-24

Every Fixed Threshold

Fixed thresholds at Portland
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days106169199879
35 C (95 F): Days10585192527
40 C (104 F): Days251119255
90 F (32.2 C): Days106138199865
100 F (37.8 C): Days6740192515
0 C (32 F): Ice days (max751120143
0 C (32 F): Frost days (min10588200327
-10 C (14 F): Days with min48919634
-20 C (-4 F): Days with min1119301
20 C (68 F): Tropical nights (min105122201873
25 C (77 F): Days with min5928199816
10 mm (0.39 in): Days with 10 mm or more rain10864197521
25 mm (0.98 in): Days with 25 mm or more rain1083119756
50 mm (1.97 in): Days with 50 mm or more rain1051220193
100 mm (3.94 in): Days with 100 mm or more rain41420192
200 mm (7.87 in): Days with 200 mm or more rain3120071
10 cm (3.9 in): Days with 10 cm or more snowfall10219291
25 cm (9.8 in): Days with 25 cm or more snowfall1119291

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1910.

Download the Data

  • Data for Portland 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).