HOTTESTSINCE.COMBrowse statesThe AlmanacYear in ReviewThe Wire
HOT10
Hottest Since
National Heat Records
Almanac · Hillsboro, OR · Climate Almanac
📖 Climate Almanac

Hillsboro, OR

45.548°N, 122.956°W · station HIOthr · 1929–2026 · 98 years of record

The Almanac Ribbon

Every day of the year at Hillsboro: the record high and record low ever set (outer lines), the everyday normal range (shaded band), and the full record envelope behind it.
-20020406080100120JanFebMarAprMayJunJulAugSepOctNovDechottestsince.com · coldestsince.com
Record high Record low Normal high–low band (1991–2020) hottest ever 114°F · coldest ever -14°F

Records by Month

MonthRecord highRecord low
Jan69°Jan 28, 1934-14°Jan 21, 1930
Feb70°Feb 28, 1968-9°Feb 2, 1950
Mar83°Mar 28, 193018°Mar 1, 1960
Apr90°Apr 29, 195720°Apr 16, 1933
May100°May 29, 198326°May 8, 1935
Jun114°Jun 28, 202130°Jun 1, 1934
Jul108°Jul 19, 195636°Jul 25, 1930
Aug107°Aug 14, 202330°Aug 30, 1930
Sep103°Sep 3, 198829°Sep 25, 1934
Oct92°Oct 2, 195220°Oct 31, 2002
Nov78°Nov 1, 19598°Nov 15, 1955
Dec64°Dec 10, 1933-2°Dec 8, 1972
All-time114°Jun 28, 2021-14°Jan 21, 1930

Longest-Standing Records

The daily records that have held the longest — set in the earliest years and never beaten since. Highs power Hillsboro on hottestsince.com; lows on coldestsince.com.

Oldest-standing record highs

DateRecordSetStanding
Nov 2864°192997yrs
Mar 2677°193096yrs
Mar 2783°193096yrs
Mar 2880°193096yrs
Nov 965°193096yrs
Jan 3064°193195yrs
Jan 3164°193195yrs
May 2992°193195yrs
Jul 799°193195yrs
Jul 18105°193195yrs
Aug 598°193294yrs
Sep 2788°193294yrs

Oldest-standing record lows

DateRecordSetStanding
Jan 1010°193096yrs
Jan 20-4°193096yrs
Jan 21-14°193096yrs
Jan 222°193096yrs
Jan 25-2°193096yrs
Jan 266°193096yrs
May 331°193096yrs
May 631°193096yrs
Jun 1333°193096yrs
Jun 1735°193096yrs
Jun 2035°193096yrs
Jun 2135°193096yrs

All-Time Extremes

Hottest ever

114°F
2021-06-28

Coldest ever

-14°F
1930-01-21

Longest heat streak

10 days
≥ 90°F · ended 1938-07-22

The Warming Trend

Hillsboro's annual mean temperature, each year a stripe — blue below the 1991–2020 average, red above.
1930: 50.3°F (-2.4 vs 1991–2020)1931: 52.5°F (-0.2 vs 1991–2020)1932: 52.1°F (-0.6 vs 1991–2020)1933: 52.0°F (-0.7 vs 1991–2020)1934: 54.7°F (+2.0 vs 1991–2020)1935: 50.6°F (-2.1 vs 1991–2020)1936: 52.0°F (-0.7 vs 1991–2020)1937: 51.9°F (-0.8 vs 1991–2020)1938: 52.5°F (-0.2 vs 1991–2020)1939: 53.0°F (+0.3 vs 1991–2020)1940: 54.0°F (+1.3 vs 1991–2020)1941: 53.4°F (+0.7 vs 1991–2020)1942: 51.3°F (-1.4 vs 1991–2020)1943: 51.5°F (-1.2 vs 1991–2020)1944: 51.8°F (-0.9 vs 1991–2020)1945: 52.1°F (-0.6 vs 1991–2020)1946: 51.9°F (-0.8 vs 1991–2020)1947: 52.8°F (+0.1 vs 1991–2020)1948: 51.0°F (-1.7 vs 1991–2020)1949: 51.5°F (-1.2 vs 1991–2020)1950: 51.8°F (-0.9 vs 1991–2020)1951: 52.9°F (+0.2 vs 1991–2020)1952: 52.6°F (-0.1 vs 1991–2020)1953: 53.4°F (+0.7 vs 1991–2020)1954: 51.5°F (-1.2 vs 1991–2020)1955: 50.2°F (-2.5 vs 1991–2020)1956: 52.2°F (-0.5 vs 1991–2020)1957: 52.5°F (-0.2 vs 1991–2020)1958: 56.3°F (+3.6 vs 1991–2020)1959: 51.9°F (-0.8 vs 1991–2020)1960: 52.1°F (-0.6 vs 1991–2020)1961: 54.5°F (+1.8 vs 1991–2020)1962: 51.8°F (-0.9 vs 1991–2020)1963: 52.1°F (-0.6 vs 1991–2020)1964: 50.0°F (-2.7 vs 1991–2020)1965: 51.7°F (-1.0 vs 1991–2020)1966: 52.0°F (-0.7 vs 1991–2020)1967: 53.5°F (+0.8 vs 1991–2020)1968: 52.3°F (-0.4 vs 1991–2020)1969: 51.9°F (-0.8 vs 1991–2020)1970: 52.4°F (-0.3 vs 1991–2020)1971: 51.8°F (-0.9 vs 1991–2020)1972: 52.4°F (-0.3 vs 1991–2020)1973: 52.6°F (-0.1 vs 1991–2020)1974: 52.9°F (+0.2 vs 1991–2020)1975: 51.9°F (-0.8 vs 1991–2020)1976: 51.7°F (-1.0 vs 1991–2020)1977: 52.4°F (-0.3 vs 1991–2020)1978: 52.4°F (-0.3 vs 1991–2020)1979: 52.5°F (-0.2 vs 1991–2020)1980: 51.7°F (-1.0 vs 1991–2020)1981: 53.1°F (+0.4 vs 1991–2020)1982: 51.3°F (-1.4 vs 1991–2020)1983: 52.4°F (-0.3 vs 1991–2020)1984: 51.2°F (-1.5 vs 1991–2020)1985: 49.9°F (-2.8 vs 1991–2020)1986: 53.3°F (+0.6 vs 1991–2020)1987: 53.8°F (+1.1 vs 1991–2020)1988: 52.6°F (-0.1 vs 1991–2020)1989: 52.1°F (-0.6 vs 1991–2020)1990: 52.6°F (-0.1 vs 1991–2020)1991: 52.7°F (+0.0 vs 1991–2020)1992: 54.6°F (+1.9 vs 1991–2020)1993: 51.8°F (-0.9 vs 1991–2020)1994: 53.1°F (+0.4 vs 1991–2020)1995: 54.2°F (+1.5 vs 1991–2020)1996: 53.0°F (+0.3 vs 1991–2020)1997: 54.5°F (+1.8 vs 1991–2020)1998: 54.3°F (+1.6 vs 1991–2020)1999: 51.3°F (-1.4 vs 1991–2020)2000: 51.1°F (-1.6 vs 1991–2020)2001: 51.1°F (-1.6 vs 1991–2020)2002: 51.7°F (-1.0 vs 1991–2020)2003: 53.6°F (+0.9 vs 1991–2020)2004: 53.5°F (+0.8 vs 1991–2020)2005: 51.9°F (-0.8 vs 1991–2020)2006: 52.6°F (-0.1 vs 1991–2020)2007: 51.2°F (-1.5 vs 1991–2020)2008: 50.6°F (-2.1 vs 1991–2020)2009: 51.3°F (-1.4 vs 1991–2020)2010: 52.1°F (-0.6 vs 1991–2020)2011: 50.4°F (-2.3 vs 1991–2020)2012: 52.0°F (-0.7 vs 1991–2020)2013: 51.7°F (-1.0 vs 1991–2020)2014: 54.0°F (+1.3 vs 1991–2020)2015: 54.9°F (+2.2 vs 1991–2020)2016: 54.2°F (+1.5 vs 1991–2020)2017: 52.7°F (-0.0 vs 1991–2020)2018: 53.6°F (+0.9 vs 1991–2020)2019: 52.3°F (-0.4 vs 1991–2020)2020: 53.5°F (+0.8 vs 1991–2020)2021: 53.4°F (+0.7 vs 1991–2020)2022: 52.7°F (+0.0 vs 1991–2020)2023: 53.6°F (+0.9 vs 1991–2020)2024: 53.6°F (+0.9 vs 1991–2020)2025: 54.4°F (+1.7 vs 1991–2020)19302025annual mean temperature · warmer ▲ redder

Days Above / Below the Mark

11 days ≥90°F in 2026 · normal 16 · record 37 in 1952
30 days ≤32°F in 2026 · normal 61 · record 112 in 1985

The Full Record

Every day of the year, record and normal high & low with the year each record was set. Type to filter, click a column to sort.
Show me the data — the full daily record
DateRec HighYrNorm HiNorm LoRec LowYr
Jan 157°196445°33°13°1979
Jan 263°202545°34°12°1979
Jan 359°198145°34°8°1950
Jan 459°198945°34°15°1942
Jan 559°198345°33°12°1942
Jan 658°200245°34°10°1979
Jan 760°194545°34°8°1937
Jan 858°193345°33°7°1937
Jan 957°195345°33°8°1949
Jan 1059°193446°33°10°1930
Jan 1158°195346°34°11°1963
Jan 1263°195346°34°1°1937
Jan 1361°199146°34°3°2017
Jan 1459°201846°34°4°2017
Jan 1561°195846°34°6°2017
Jan 1658°196546°34°13°2024
Jan 1760°197547°34°10°1950
Jan 1864°200547°34°5°1943
Jan 1960°198647°34°15°1935
Jan 2058°196847°34°-4°1930
Jan 2159°196847°34°-14°1930
Jan 2258°196848°34°2°1930
Jan 2366°193448°35°1°1943
Jan 2463°193548°35°-2°1943
Jan 2560°198448°35°-2°1930
Jan 2661°200348°35°6°1930
Jan 2764°194048°35°5°1957
Jan 2869°193449°35°6°1957
Jan 2960°196249°35°10°1957
Jan 3064°193149°35°9°1979
Jan 3164°193149°34°-10°1950
Feb 160°196249°34°3°1950
Feb 260°193549°34°-9°1950
Feb 362°196349°34°-7°1950
Feb 463°202650°34°9°1989
Feb 564°197850°34°8°1989
Feb 663°199850°34°19°2014
Feb 762°196350°34°15°1989
Feb 864°196350°34°14°1936
Feb 963°196350°34°11°1933
Feb 1066°196351°34°13°1933
Feb 1166°196351°34°18°1982
Feb 1263°193451°34°19°2025
Feb 1362°198151°34°18°1995
Feb 1465°197751°34°18°1936
Feb 1564°199651°34°15°1936
Feb 1662°201551°34°16°1956
Feb 1764°194851°34°15°1936
Feb 1868°197751°34°21°1936
Feb 1968°197751°34°16°2006
Feb 2062°197851°34°18°2006
Feb 2164°195851°34°22°2018
Feb 2264°197651°34°24°1942
Feb 2365°199551°34°20°2018
Feb 2464°196451°34°16°2023
Feb 2566°198652°34°16°2023
Feb 2668°196852°34°17°1962
Feb 2768°196852°34°18°1960
Feb 2870°196852°34°22°1971
Feb 2970°198852°34°20°1960
Mar 167°198152°35°18°1960
Mar 269°198653°35°24°1989
Mar 367°196553°35°22°1960
Mar 470°198654°36°20°1955
Mar 569°200154°36°26°1951
Mar 669°196554°36°22°1956
Mar 771°195354°36°25°1985
Mar 873°200455°36°24°1943
Mar 974°200555°36°21°1943
Mar 1076°200555°37°23°2019
Mar 1174°193455°37°24°2009
Mar 1270°196556°37°25°1956
Mar 1374°194756°37°25°1941
Mar 1477°194756°37°23°1951
Mar 1578°194756°37°24°2021
Mar 1675°194756°37°25°1955
Mar 1775°202456°38°24°1943
Mar 1877°202456°38°24°1965
Mar 1975°201956°37°25°1955
Mar 2077°193456°37°28°2007
Mar 2174°193956°37°27°1952
Mar 2273°197957°37°27°1936
Mar 2370°194057°37°26°1942
Mar 2479°202557°38°28°2000
Mar 2577°202557°38°28°1936
Mar 2677°193057°37°26°1935
Mar 2783°193057°38°25°1944
Mar 2880°193058°38°28°1950
Mar 2977°200458°38°24°1954
Mar 3075°196458°38°27°1968
Mar 3176°198758°38°26°1952
Apr 182°198758°38°25°2008
Apr 280°199258°38°26°2008
Apr 380°199259°39°26°2009
Apr 479°197759°39°28°1975
Apr 579°200759°39°25°1965
Apr 679°202259°39°26°2001
Apr 786°201659°39°29°1975
Apr 885°201659°39°28°1999
Apr 980°198559°39°29°1939
Apr 1083°193459°40°26°2021
Apr 1183°194360°40°29°1970
Apr 1282°194760°40°29°1945
Apr 1387°194760°40°26°1968
Apr 1481°194760°40°29°1970
Apr 1583°193661°40°20°1933
Apr 1683°202161°40°28°1977
Apr 1784°193461°40°25°1964
Apr 1888°193461°40°29°1964
Apr 1988°193462°40°30°1964
Apr 2088°195662°40°27°1951
Apr 2180°198262°40°28°1968
Apr 2282°201263°41°28°1972
Apr 2382°201263°41°30°1986
Apr 2485°201864°41°28°2000
Apr 2586°201864°41°29°1943
Apr 2687°198764°41°30°1946
Apr 2790°202364°42°28°1948
Apr 2890°195764°42°30°1942
Apr 2990°199865°42°28°1949
Apr 3087°199865°42°28°1954
May 184°193765°42°31°1935
May 290°202666°42°30°1952
May 384°195366°42°31°1930
May 489°199266°43°30°1952
May 590°199266°43°30°1965
May 694°198767°43°31°1930
May 795°198767°43°26°1935
May 892°198767°44°28°1935
May 987°198767°44°31°1935
May 1092°199768°44°29°1985
May 1192°194968°44°30°1985
May 1292°197368°45°32°1970
May 1392°193968°45°32°1964
May 1494°200668°45°30°1934
May 1588°195668°46°33°1964
May 1693°195668°46°32°1966
May 1797°195669°46°31°2003
May 1890°195669°46°34°1941
May 1992°196369°47°30°1975
May 2091°195869°47°32°1935
May 2194°200169°47°35°1934
May 2289°194769°47°32°1960
May 2389°194370°47°32°1964
May 2489°194770°47°31°1935
May 2593°193670°48°32°1935
May 2694°200570°48°33°1935
May 2792°197271°48°34°1934
May 28100°198371°48°32°1951
May 2992°193171°48°34°1934
May 3093°198671°48°32°1934
May 3196°202171°48°30°1934
Jun 193°197071°48°33°1934
Jun 291°196971°48°36°1934
Jun 393°193571°48°35°2001
Jun 498°201671°48°36°1966
Jun 599°201671°49°37°1979
Jun 694°194871°49°37°2012
Jun 796°202571°49°38°1975
Jun 895°194871°49°37°1944
Jun 990°193471°49°37°1933
Jun 1094°201971°49°39°1947
Jun 1197°201971°49°38°1955
Jun 1296°200271°49°36°2001
Jun 1396°196172°49°33°1930
Jun 1499°196172°49°35°1935
Jun 15100°196172°49°37°1935
Jun 1698°195872°49°37°1935
Jun 1796°196173°49°35°1930
Jun 1898°198273°49°34°1934
Jun 1996°197074°50°36°1935
Jun 2095°195874°50°35°1930
Jun 2199°195875°50°35°1930
Jun 2296°199275°50°35°1930
Jun 23102°199276°50°35°1935
Jun 24100°201776°51°34°1935
Jun 25106°202177°51°34°1935
Jun 26109°202177°51°34°1965
Jun 27114°202177°51°37°1935
Jun 28101°200877°51°31°1935
Jun 2999°194278°51°32°1935
Jun 30101°194278°52°37°1935
Jul 1100°194278°52°38°1930
Jul 298°194279°52°39°1948
Jul 396°201579°52°40°1935
Jul 498°195879°52°42°1999
Jul 5100°202479°52°39°1935
Jul 6102°196079°52°37°1932
Jul 799°193180°52°38°1944
Jul 8102°202480°52°40°1932
Jul 9103°202480°52°44°1941
Jul 10102°196180°52°40°1960
Jul 11105°196180°53°40°1962
Jul 12107°193581°53°40°1970
Jul 13105°193581°53°41°1939
Jul 14104°194182°53°41°1943
Jul 15101°194182°53°40°1939
Jul 16101°197982°54°41°1945
Jul 17102°197182°54°39°1930
Jul 18105°193182°54°39°1930
Jul 19108°195683°54°40°1939
Jul 20108°200683°54°41°1932
Jul 21103°193883°54°40°1933
Jul 22105°200683°54°41°1932
Jul 23101°200483°54°42°1932
Jul 24100°200484°54°36°1930
Jul 25103°193984°54°37°1930
Jul 26105°195884°54°37°1930
Jul 27105°200984°54°42°1933
Jul 28106°200984°54°40°1933
Jul 29103°201584°53°40°1945
Jul 30102°196584°53°40°1941
Jul 31101°196584°53°41°1933
Aug 1105°201784°53°41°1946
Aug 2105°201784°53°42°1930
Aug 3104°195283°53°40°1950
Aug 4103°195283°53°40°1931
Aug 598°193283°53°41°1939
Aug 6104°197283°53°41°1931
Aug 7104°197283°53°40°1938
Aug 8104°198183°53°40°1959
Aug 9102°197183°53°41°1966
Aug 10104°198183°53°42°1932
Aug 11104°197783°53°44°1931
Aug 12101°199283°53°43°1949
Aug 13107°202383°53°41°1931
Aug 14103°202383°53°39°1935
Aug 15103°197783°53°37°1935
Aug 16106°197783°52°40°1935
Aug 1799°201282°52°39°1973
Aug 18102°201682°52°40°1944
Aug 19101°195182°52°40°1944
Aug 20101°201682°52°39°1930
Aug 2199°202582°52°38°1938
Aug 22101°202582°52°32°1930
Aug 23101°195881°52°34°1930
Aug 24100°198881°51°39°1930
Aug 2599°193581°51°39°1955
Aug 26100°198680°51°41°1942
Aug 27100°196780°51°38°1937
Aug 2898°196780°50°37°1965
Aug 2998°202280°50°30°1930
Aug 30100°199880°50°34°1930
Aug 31101°198780°50°37°1973
Sep 1100°201780°50°38°2008
Sep 297°198879°50°38°1960
Sep 3103°198879°50°31°1930
Sep 499°195579°50°34°1930
Sep 5102°194479°50°38°2001
Sep 6100°195879°49°37°1999
Sep 7100°198178°49°38°2002
Sep 895°194478°49°38°1970
Sep 996°194877°49°38°1999
Sep 1098°194477°49°38°1964
Sep 1195°194477°49°35°1936
Sep 1292°195776°49°31°1970
Sep 1397°193776°48°35°1970
Sep 1495°197976°48°35°1969
Sep 1598°198176°48°35°1936
Sep 1694°195175°48°29°1965
Sep 1793°195275°48°30°1965
Sep 1892°195274°48°33°1947
Sep 1995°195274°47°34°1947
Sep 2096°195274°47°35°1955
Sep 2195°195274°47°34°1961
Sep 2297°195274°47°31°1930
Sep 2395°195274°46°33°1970
Sep 2491°199174°46°29°1934
Sep 2594°199173°46°31°1972
Sep 2695°200373°46°30°1999
Sep 2788°193272°45°31°1972
Sep 2887°193272°45°33°1937
Sep 2992°199371°45°33°1950
Sep 3089°198771°45°30°1950
Oct 192°198770°45°31°1950
Oct 292°195270°44°32°1931
Oct 386°193269°44°33°1973
Oct 488°193268°44°31°1974
Oct 591°195268°44°31°1931
Oct 691°195267°43°31°1970
Oct 789°202267°43°31°1931
Oct 887°202266°43°28°1985
Oct 987°193666°43°28°1985
Oct 1087°199166°42°28°1930
Oct 1182°199165°42°28°1930
Oct 1287°202265°42°30°2002
Oct 1384°196165°42°27°1969
Oct 1486°202264°42°28°1999
Oct 1586°202264°42°28°1933
Oct 1681°194064°41°28°1971
Oct 1783°195263°41°28°1945
Oct 1880°194463°41°26°1949
Oct 1978°194062°41°24°1949
Oct 2080°200362°41°28°1949
Oct 2178°201362°41°30°1930
Oct 2277°196561°40°28°1945
Oct 2375°196460°40°29°1935
Oct 2473°199260°40°26°2002
Oct 2577°196560°40°25°2020
Oct 2674°201759°39°24°2020
Oct 2773°194459°39°25°1946
Oct 2878°194458°39°24°1971
Oct 2977°199358°39°23°2019
Oct 3072°196257°39°20°2002
Oct 3178°195957°39°24°1935
Nov 170°196256°39°16°2002
Nov 271°197556°39°13°1935
Nov 370°194956°39°18°1935
Nov 470°194955°39°22°1935
Nov 570°198055°39°23°1935
Nov 666°195555°39°25°1959
Nov 764°195555°39°21°1964
Nov 868°201654°39°20°1936
Nov 965°193054°39°23°1936
Nov 1066°201654°39°21°1936
Nov 1165°197454°39°19°1955
Nov 1267°199553°38°17°1978
Nov 1365°200153°38°12°1955
Nov 1463°200152°38°8°1955
Nov 1564°194952°38°17°1955
Nov 1666°197652°37°21°1955
Nov 1762°196552°37°21°2000
Nov 1859°193251°37°18°2000
Nov 1967°200251°37°21°2000
Nov 2063°193650°36°21°1964
Nov 2163°201750°36°19°1978
Nov 2263°195950°36°12°1985
Nov 2366°194949°35°9°1985
Nov 2462°193649°35°9°1985
Nov 2561°194749°35°19°1952
Nov 2662°194749°35°19°1952
Nov 2760°202148°34°18°1952
Nov 2864°192948°34°15°1952
Nov 2959°195148°34°16°1952
Nov 3064°195148°34°18°1952
Dec 161°195847°34°19°1985
Dec 258°194647°34°21°1976
Dec 363°202347°34°19°2013
Dec 461°202347°34°15°2013
Dec 558°193847°34°21°1972
Dec 661°201547°34°12°2013
Dec 760°193847°34°9°2013
Dec 860°201446°34°-2°1972
Dec 964°193346°34°3°1972
Dec 1061°201446°34°2°1972
Dec 1160°195646°34°5°1932
Dec 1262°196046°34°4°1972
Dec 1358°195246°34°0°1972
Dec 1463°202546°34°16°1932
Dec 1560°197446°34°12°1932
Dec 1661°193746°34°12°2008
Dec 1762°198046°34°8°1964
Dec 1860°199446°34°8°1964
Dec 1961°197445°34°13°1990
Dec 2060°195545°34°9°1990
Dec 2159°197245°34°4°1998
Dec 2264°195045°33°4°1998
Dec 2359°194945°33°9°1990
Dec 2457°195045°33°11°1990
Dec 2559°198045°33°19°1985
Dec 2664°198045°33°19°1985
Dec 2760°198045°33°17°1948
Dec 2860°198045°33°13°1990
Dec 2958°195845°33°12°1990
Dec 3056°195845°33°8°1968
Dec 3162°198045°33°8°1968
Forecast & records → Hillsboro station On This Day → national almanac
Data: NOAA/NWS Threaded Extremes (threadex) · normals 1991–2020 · part of Weather Trader