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Almanac · Ontario, OR · Climate Almanac
📖 Climate Almanac

Ontario, OR

44.014°N, 117.008°W · station ONOthr · 1945–2026 · 82 years of record

The Almanac Ribbon

Every day of the year at Ontario: the record high and record low ever set (outer lines), the everyday normal range (shaded band), and the full record envelope behind it.
-20020406080100120JanFebMarAprMayJunJulAugSepOctNovDeccoldestsince.com · hottestsince.com
Record high Record low Normal high–low band (1991–2020) hottest ever 113°F · coldest ever -25°F

Records by Month

MonthRecord highRecord low
Jan64°Jan 9, 1953-25°Jan 27, 1957
Feb69°Feb 29, 2024-24°Feb 4, 1989
Mar85°Mar 30, 19669°Mar 11, 1948
Apr94°Apr 24, 197717°Apr 6, 1956
May103°May 29, 198625°May 1, 1946
Jun109°Jun 28, 201531°Jun 18, 1973
Jul113°Jul 12, 196734°Jul 5, 1986
Aug113°Aug 4, 196133°Aug 28, 1960
Sep104°Sep 1, 196724°Sep 19, 1965
Oct93°Oct 3, 19639°Oct 30, 2019
Nov74°Nov 7, 2006-6°Nov 25, 1993
Dec66°Dec 22, 1955-23°Dec 10, 1972
All-time113°Aug 4, 1961-25°Jan 27, 1957

Longest-Standing Records

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

Oldest-standing record highs

DateRecordSetStanding
Oct 1185°194581yrs
May 194°194779yrs
Jan 2253°194878yrs
Jan 2356°194878yrs
Sep 1496°194878yrs
Nov 2671°194977yrs
Oct 1282°195076yrs
Nov 2960°195076yrs
Jan 1755°195175yrs
Apr 1282°195175yrs
Sep 1995°195274yrs
Oct 385°195274yrs

Oldest-standing record lows

DateRecordSetStanding
Aug 2736°194581yrs
Sep 632°194581yrs
Apr 3025°194680yrs
May 2937°194680yrs
Jun 2339°194680yrs
Jul 2546°194779yrs
Mar 514°194878yrs
Mar 119°194878yrs
May 226°194878yrs
Jul 2843°194878yrs
Jul 2944°194878yrs
Oct 1721°194878yrs

All-Time Extremes

Hottest ever

113°F
1961-08-04

Coldest ever

-25°F
1957-01-27

Longest heat streak

74 days
≥ 90°F · ended 1967-09-09

The Warming Trend

Ontario's annual mean temperature, each year a stripe — blue below the 1991–2020 average, red above.
1946: 52.3°F (+0.2 vs 1991–2020)1948: 49.4°F (-2.7 vs 1991–2020)1949: 50.0°F (-2.1 vs 1991–2020)1950: 50.4°F (-1.7 vs 1991–2020)1951: 50.0°F (-2.1 vs 1991–2020)1952: 50.4°F (-1.7 vs 1991–2020)1953: 52.1°F (+0.0 vs 1991–2020)1954: 51.1°F (-1.0 vs 1991–2020)1956: 51.4°F (-0.7 vs 1991–2020)1957: 51.0°F (-1.1 vs 1991–2020)1958: 53.6°F (+1.5 vs 1991–2020)1959: 52.5°F (+0.4 vs 1991–2020)1960: 52.1°F (-0.0 vs 1991–2020)1961: 53.7°F (+1.6 vs 1991–2020)1962: 51.6°F (-0.5 vs 1991–2020)1963: 52.8°F (+0.7 vs 1991–2020)1964: 50.0°F (-2.1 vs 1991–2020)1965: 52.5°F (+0.4 vs 1991–2020)1966: 54.2°F (+2.1 vs 1991–2020)1967: 53.5°F (+1.4 vs 1991–2020)1968: 52.8°F (+0.7 vs 1991–2020)1969: 52.4°F (+0.3 vs 1991–2020)1970: 52.2°F (+0.1 vs 1991–2020)1971: 52.7°F (+0.6 vs 1991–2020)1972: 51.8°F (-0.3 vs 1991–2020)1973: 53.8°F (+1.7 vs 1991–2020)1974: 52.3°F (+0.2 vs 1991–2020)1975: 50.3°F (-1.8 vs 1991–2020)1976: 49.6°F (-2.5 vs 1991–2020)1977: 51.2°F (-0.9 vs 1991–2020)1978: 51.2°F (-0.9 vs 1991–2020)1979: 50.9°F (-1.2 vs 1991–2020)1980: 51.6°F (-0.5 vs 1991–2020)1981: 52.7°F (+0.6 vs 1991–2020)1982: 49.2°F (-2.9 vs 1991–2020)1983: 52.3°F (+0.2 vs 1991–2020)1984: 49.4°F (-2.7 vs 1991–2020)1985: 47.3°F (-4.8 vs 1991–2020)1986: 50.3°F (-1.8 vs 1991–2020)1987: 51.8°F (-0.3 vs 1991–2020)1989: 47.7°F (-4.4 vs 1991–2020)1990: 52.5°F (+0.4 vs 1991–2020)1991: 50.3°F (-1.8 vs 1991–2020)1992: 52.2°F (+0.1 vs 1991–2020)1993: 47.9°F (-4.2 vs 1991–2020)1994: 52.1°F (-0.0 vs 1991–2020)1995: 51.5°F (-0.6 vs 1991–2020)1996: 51.5°F (-0.6 vs 1991–2020)1998: 52.5°F (+0.4 vs 1991–2020)1999: 51.0°F (-1.1 vs 1991–2020)2000: 52.3°F (+0.2 vs 1991–2020)2001: 51.9°F (-0.2 vs 1991–2020)2002: 52.4°F (+0.3 vs 1991–2020)2003: 54.2°F (+2.1 vs 1991–2020)2004: 51.5°F (-0.6 vs 1991–2020)2005: 50.3°F (-1.8 vs 1991–2020)2006: 52.5°F (+0.4 vs 1991–2020)2007: 53.1°F (+1.0 vs 1991–2020)2008: 50.8°F (-1.3 vs 1991–2020)2009: 51.0°F (-1.1 vs 1991–2020)2010: 51.3°F (-0.8 vs 1991–2020)2011: 50.5°F (-1.6 vs 1991–2020)2012: 53.4°F (+1.3 vs 1991–2020)2013: 51.2°F (-0.9 vs 1991–2020)2014: 53.3°F (+1.2 vs 1991–2020)2015: 54.8°F (+2.7 vs 1991–2020)2016: 53.1°F (+1.0 vs 1991–2020)2017: 51.6°F (-0.5 vs 1991–2020)2018: 54.1°F (+2.0 vs 1991–2020)2019: 53.7°F (+1.6 vs 1991–2020)2020: 54.0°F (+1.9 vs 1991–2020)2021: 55.6°F (+3.5 vs 1991–2020)2022: 53.0°F (+0.9 vs 1991–2020)2023: 54.4°F (+2.3 vs 1991–2020)2024: 55.2°F (+3.1 vs 1991–2020)2025: 54.3°F (+2.2 vs 1991–2020)19462025annual mean temperature · warmer ▲ redder

Days Above / Below the Mark

63 days ≥90°F in 2026 · normal 63 · record 94 in 1967
73 days ≤32°F in 2026 · normal 133 · record 174 in 1976

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 154°202034°20°-12°1979
Jan 250°202035°21°-6°2016
Jan 354°202135°21°-2°1991
Jan 453°196335°21°-9°1949
Jan 553°198035°21°-15°1950
Jan 655°196635°21°-19°2017
Jan 758°199035°21°-20°2017
Jan 852°195335°21°-12°1979
Jan 964°195335°22°-13°1977
Jan 1053°199536°22°-14°1977
Jan 1153°199536°22°-17°1949
Jan 1254°201836°23°-10°1949
Jan 1355°198036°23°-9°1949
Jan 1456°198036°23°-9°1949
Jan 1555°197436°24°-7°1949
Jan 1656°195436°24°-10°2017
Jan 1755°195136°24°-7°2017
Jan 1851°195337°24°-11°1984
Jan 1953°195337°24°-5°1960
Jan 2056°195337°24°-9°1984
Jan 2154°197237°24°-15°1962
Jan 2253°194837°24°-25°1962
Jan 2356°194838°24°-24°1962
Jan 2461°195938°24°-16°1949
Jan 2559°195338°24°-21°1949
Jan 2658°197138°24°-16°1957
Jan 2757°197138°24°-25°1957
Jan 2857°195439°24°-8°1980
Jan 2961°196739°24°-21°1957
Jan 3057°195340°24°-20°1957
Jan 3157°195340°24°-19°1979
Feb 157°202140°24°-11°1950
Feb 261°202141°25°-19°1950
Feb 365°201841°25°-18°1950
Feb 463°201841°25°-24°1989
Feb 562°196342°25°-21°1989
Feb 663°201542°25°-23°1989
Feb 767°201542°25°-22°1989
Feb 864°201543°26°-22°1989
Feb 961°201543°26°-20°1989
Feb 1066°196144°26°-5°1982
Feb 1163°197144°26°2°1982
Feb 1259°195445°26°-1°2025
Feb 1356°195445°27°1°2025
Feb 1463°201545°27°-3°1989
Feb 1563°201646°27°3°1989
Feb 1658°200746°27°2°1956
Feb 1759°196546°27°6°1993
Feb 1862°199647°27°-1°1952
Feb 1967°199547°27°8°2006
Feb 2064°196847°27°8°2006
Feb 2162°199148°27°6°1952
Feb 2264°199148°27°-1°1952
Feb 2366°195848°27°15°2023
Feb 2466°196348°27°8°1952
Feb 2566°196349°27°1°1993
Feb 2664°197649°28°-3°1993
Feb 2765°196850°28°0°1993
Feb 2865°195950°28°6°1993
Feb 2970°199450°28°12°1960
Mar 170°198651°28°11°1960
Mar 268°196852°29°10°1989
Mar 368°198752°29°12°1989
Mar 469°202153°29°14°1954
Mar 566°201254°30°14°1948
Mar 668°200554°30°16°1985
Mar 769°200555°31°17°1990
Mar 871°200555°31°19°1974
Mar 971°200556°31°17°1951
Mar 1074°197256°32°16°1951
Mar 1172°200357°32°9°1948
Mar 1274°200357°32°14°1956
Mar 1372°199457°32°18°1977
Mar 1474°199458°33°16°1959
Mar 1570°197258°33°16°1977
Mar 1674°197258°33°20°1980
Mar 1777°197259°33°13°1965
Mar 1879°202658°33°12°1965
Mar 1980°202658°33°13°1965
Mar 2074°198858°34°17°1965
Mar 2173°196059°34°18°1966
Mar 2275°196059°34°16°1966
Mar 2378°196059°34°16°1965
Mar 2478°195659°34°18°1965
Mar 2580°196060°34°22°1980
Mar 2679°196660°34°23°1967
Mar 2783°196660°34°20°1951
Mar 2882°196660°34°18°1987
Mar 2985°196660°34°22°1967
Mar 3081°200460°35°19°1954
Mar 3184°196660°35°21°1971
Apr 182°199060°35°19°2008
Apr 280°199061°35°20°2008
Apr 377°199061°35°19°1997
Apr 482°195962°36°23°1966
Apr 582°196062°36°23°1983
Apr 684°196062°36°17°1956
Apr 782°196662°36°19°1973
Apr 882°199662°36°22°2001
Apr 986°202362°36°20°1999
Apr 1082°196863°36°22°1954
Apr 1179°196263°36°22°1970
Apr 1282°195164°37°23°1970
Apr 1387°196264°37°22°1968
Apr 1484°198564°37°24°1953
Apr 1587°199465°38°20°1982
Apr 1687°199465°38°21°1960
Apr 1788°196265°38°19°1964
Apr 1888°196266°38°24°1966
Apr 1985°199466°38°21°1961
Apr 2087°195666°38°22°1982
Apr 2188°195667°39°22°2008
Apr 2291°197767°39°25°2011
Apr 2394°197768°39°22°1950
Apr 2493°197768°39°27°2002
Apr 2588°198768°40°27°1969
Apr 2693°198769°40°26°2011
Apr 2786°197769°40°26°1966
Apr 2886°202169°41°25°1962
Apr 2990°196869°41°24°1950
Apr 3089°197170°41°25°1946
May 194°194770°41°26°1954
May 293°196670°42°26°1948
May 398°196671°42°28°1964
May 495°196671°42°28°1964
May 594°196672°43°30°1950
May 695°198772°43°26°1964
May 792°199272°44°26°2002
May 893°196973°44°31°1999
May 991°201373°45°28°1999
May 1095°199373°45°27°1970
May 1194°201374°46°32°1967
May 1296°198874°46°28°2009
May 1394°197374°46°28°1970
May 1495°197374°46°28°1966
May 1597°197374°46°30°1974
May 1698°197375°47°29°1974
May 1796°197375°47°27°1989
May 1896°200875°48°31°2003
May 1994°196476°48°31°1960
May 2096°196776°48°30°1974
May 2195°196776°49°32°1973
May 2295°195676°49°26°1960
May 2398°200177°49°32°1964
May 2496°196177°49°25°1975
May 25102°196677°49°30°1975
May 2696°195878°50°33°1953
May 27100°200378°50°30°1954
May 28103°198679°50°35°1959
May 29101°198679°50°37°1946
May 30102°197279°51°34°1990
May 31101°197279°51°35°1951
Jun 199°202180°51°33°1954
Jun 2102°202180°51°33°1951
Jun 3102°197080°51°34°1962
Jun 4100°195780°51°34°1966
Jun 5103°197780°51°32°1956
Jun 6100°197780°51°36°1956
Jun 799°201581°51°35°1974
Jun 899°201581°52°39°1950
Jun 999°196581°52°39°1984
Jun 10103°195981°52°36°1993
Jun 11102°195981°52°37°1993
Jun 12101°198781°52°38°1972
Jun 13105°197481°52°36°1952
Jun 14104°197482°52°34°1976
Jun 15106°196182°52°38°1957
Jun 16108°196183°52°40°1949
Jun 17106°197483°53°31°1973
Jun 18106°196184°53°33°1996
Jun 19107°195984°54°40°1989
Jun 20103°196185°54°40°1953
Jun 21106°197085°54°37°1993
Jun 22108°197086°55°39°1956
Jun 23107°197087°55°39°1946
Jun 24107°197087°56°33°1966
Jun 25106°197088°56°40°1963
Jun 26105°196888°57°31°1976
Jun 27109°201589°57°36°1976
Jun 28106°201590°58°37°1971
Jun 29107°202190°58°36°1949
Jun 30110°201390°58°38°1968
Jul 1107°201390°58°40°1968
Jul 2107°202191°58°37°1995
Jul 3105°196891°59°39°1956
Jul 4108°196892°59°34°1986
Jul 5107°202192°59°46°1982
Jul 6104°196892°59°43°1977
Jul 7108°196893°59°37°1981
Jul 8107°196893°60°42°1959
Jul 9110°197393°60°46°2004
Jul 10111°200293°60°44°1983
Jul 11113°196793°60°43°1950
Jul 12110°200294°60°41°1950
Jul 13108°202494°60°44°1965
Jul 14107°196194°60°47°1993
Jul 15106°197094°60°44°1983
Jul 16109°195994°61°44°1993
Jul 17110°196094°61°43°1987
Jul 18109°196095°61°43°1962
Jul 19112°196095°61°44°1962
Jul 20111°195995°61°45°1949
Jul 21110°196095°61°44°1954
Jul 22108°195995°61°40°1972
Jul 23107°195695°61°44°1972
Jul 24106°195696°61°49°1957
Jul 25106°195996°61°46°1947
Jul 26107°196896°62°49°1993
Jul 27109°202296°62°44°2015
Jul 28111°202296°61°43°1948
Jul 29109°196895°61°44°1948
Jul 30109°196895°61°45°1963
Jul 31109°202295°61°44°1975
Aug 1110°196195°61°45°1963
Aug 2111°196195°60°46°1964
Aug 3113°196195°60°37°1956
Aug 4110°196194°60°46°1980
Aug 5107°197294°60°43°1950
Aug 6107°197294°60°43°1969
Aug 7110°197194°59°40°1995
Aug 8110°197194°59°45°1967
Aug 9109°197193°59°45°1985
Aug 10107°197193°58°42°1970
Aug 11109°197193°58°43°1985
Aug 12107°196093°58°38°1995
Aug 13106°196792°58°40°1978
Aug 14108°196792°58°42°1974
Aug 15109°202392°58°41°1970
Aug 16108°196792°57°41°1976
Aug 17105°196792°57°38°1978
Aug 18109°196791°56°39°1978
Aug 19107°196791°56°42°1976
Aug 20104°196191°56°41°1964
Aug 21105°196191°56°41°1966
Aug 22106°196990°55°39°1959
Aug 23105°196990°55°37°1960
Aug 24104°195890°55°36°1992
Aug 25102°198890°54°36°1993
Aug 26101°197489°54°37°1992
Aug 27101°197489°54°36°1945
Aug 28105°196788°53°33°1960
Aug 29103°196788°53°35°1960
Aug 30102°196788°53°35°1965
Aug 31104°196787°52°37°1965
Sep 1100°196787°52°37°1975
Sep 2100°202286°52°36°1961
Sep 399°196086°51°37°1969
Sep 4101°201986°51°34°1980
Sep 5101°196685°51°35°1996
Sep 6102°202285°50°32°1945
Sep 798°196984°50°35°1971
Sep 898°195884°50°33°1962
Sep 998°195883°49°32°1976
Sep 1099°195983°49°34°2005
Sep 1196°196382°49°35°1949
Sep 1297°196082°48°33°1949
Sep 1394°195381°48°30°1970
Sep 1496°194881°48°29°1970
Sep 1595°195680°47°30°1970
Sep 1695°195680°47°32°1965
Sep 1796°198180°46°25°1965
Sep 1895°197980°46°24°1965
Sep 1995°195279°46°27°1978
Sep 2097°196679°46°25°1983
Sep 21100°196678°45°28°1971
Sep 2295°196678°45°29°1956
Sep 2392°196678°45°26°1956
Sep 2494°200978°44°27°2000
Sep 2595°202477°44°25°1984
Sep 2694°195777°44°26°1972
Sep 2792°202276°43°28°1971
Sep 2895°196376°43°26°1985
Sep 2993°195775°42°24°1985
Sep 3093°199775°42°22°1950
Oct 191°199274°42°26°1954
Oct 293°196374°41°26°1953
Oct 385°195273°41°22°1973
Oct 486°195872°40°26°1969
Oct 586°196071°40°20°1974
Oct 690°197170°40°21°1974
Oct 788°196470°39°21°1974
Oct 887°196569°39°20°1985
Oct 989°198868°38°18°1985
Oct 1084°197168°38°21°2019
Oct 1185°194568°37°24°1986
Oct 1282°195068°37°19°1969
Oct 1385°195867°37°17°1969
Oct 1484°195867°36°18°1969
Oct 1583°199166°36°19°1970
Oct 1680°197365°36°18°1970
Oct 1780°195865°36°21°1948
Oct 1879°200365°35°19°1982
Oct 1977°202364°35°18°1976
Oct 2079°202163°35°15°1996
Oct 2177°200363°35°17°1976
Oct 2278°196062°34°19°1984
Oct 2376°195961°34°18°1984
Oct 2480°197761°34°21°1955
Oct 2578°198860°33°17°1978
Oct 2674°195859°33°19°1954
Oct 2779°200358°33°20°1954
Oct 2872°196557°32°15°2019
Oct 2975°199057°32°9°2019
Oct 3072°196656°32°14°2006
Oct 3171°196256°32°10°1995
Nov 170°201855°31°9°1995
Nov 270°196654°31°12°1995
Nov 372°196554°31°14°2002
Nov 468°202053°30°13°1993
Nov 569°202053°30°10°1971
Nov 674°200652°30°12°2003
Nov 768°195852°30°12°1993
Nov 865°197152°30°14°1993
Nov 966°201651°30°11°1952
Nov 1064°196951°29°16°1952
Nov 1167°199950°29°14°2014
Nov 1265°196950°29°8°1978
Nov 1365°195350°29°7°1978
Nov 1464°196649°29°2°1955
Nov 1563°202348°28°-1°2014
Nov 1663°196548°28°-3°2014
Nov 1762°196547°28°-3°2014
Nov 1872°200347°28°1°2014
Nov 1968°196646°27°5°1994
Nov 2068°200646°27°1°1994
Nov 2161°197445°27°2°1985
Nov 2259°200245°27°-3°1985
Nov 2359°196744°26°-4°1993
Nov 2465°196044°26°-6°1993
Nov 2562°196044°26°-4°1993
Nov 2671°194943°26°7°1979
Nov 2756°201442°26°5°1976
Nov 2858°201442°25°2°1979
Nov 2960°195041°25°4°1979
Nov 3062°199541°24°5°1952
Dec 158°197740°24°10°1969
Dec 260°197740°24°9°1969
Dec 358°200740°24°-1°1992
Dec 454°197540°24°-4°1992
Dec 563°198739°24°-11°1992
Dec 652°198139°24°-5°1992
Dec 754°199339°24°-12°2013
Dec 855°201539°24°-14°2013
Dec 954°199338°23°-18°1972
Dec 1065°199538°23°-23°1972
Dec 1165°199538°23°-21°1972
Dec 1255°200238°23°-6°1985
Dec 1357°200238°23°-13°1972
Dec 1456°200238°23°-13°1972
Dec 1555°200237°23°-15°1972
Dec 1658°202537°23°-4°1985
Dec 1754°197337°22°-11°1964
Dec 1853°202537°22°-11°2016
Dec 1955°195536°22°-7°1990
Dec 2059°195736°22°-20°1990
Dec 2166°195536°22°-20°1990
Dec 2260°196436°21°-13°1990
Dec 2356°196436°21°-14°1990
Dec 2459°196435°21°-9°1948
Dec 2555°195535°21°-8°1985
Dec 2653°195535°21°-9°1985
Dec 2760°196535°21°-8°1985
Dec 2855°196534°20°-12°1990
Dec 2956°199634°20°-12°1985
Dec 3053°199634°20°-7°2016
Dec 3160°199634°20°-9°2016
Forecast & records → Ontario station On This Day → national almanac
Data: NOAA/NWS Threaded Extremes (threadex) · normals 1991–2020 · part of Weather Trader