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Almanac · Sterling-Dulles Airport, VA · Climate Almanac
📖 Climate Almanac

Sterling-Dulles Airport, VA

38.935°N, 77.447°W · station IADthr · 1960–2026 · 67 years of record

The Almanac Ribbon

Every day of the year at Sterling-Dulles Airport: the record high and record low ever set (outer lines), the everyday normal range (shaded band), and the full record envelope behind it.
-20020406080100JanFebMarAprMayJunJulAugSepOctNovDechottestsince.com · coldestsince.com
Record high Record low Normal high–low band (1991–2020) hottest ever 105°F · coldest ever -18°F

Records by Month

MonthRecord highRecord low
Jan79°Jan 26, 2024-18°Jan 22, 1984
Feb80°Feb 21, 2018-14°Feb 18, 1979
Mar89°Mar 12, 1990-1°Mar 15, 1993
Apr93°Apr 25, 196017°Apr 1, 1969
May97°May 29, 196928°May 7, 1970
Jun102°Jun 29, 201236°Jun 8, 1977
Jul105°Jul 22, 201141°Jul 1, 1988
Aug104°Aug 20, 198338°Aug 29, 1982
Sep100°Sep 6, 202330°Sep 24, 1974
Oct96°Oct 2, 201915°Oct 24, 1969
Nov84°Nov 2, 19719°Nov 24, 1989
Dec79°Dec 6, 1998-4°Dec 25, 1989
All-time105°Jul 22, 2011-18°Jan 22, 1984

Longest-Standing Records

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

Oldest-standing record highs

DateRecordSetStanding
Apr 2593°196066yrs
May 1490°196264yrs
Aug 2096°196264yrs
Aug 3198°196264yrs
Mar 1677°196363yrs
May 891°196363yrs
May 990°196363yrs
Jun 994°196363yrs
Oct 1683°196363yrs
Oct 2684°196363yrs
Nov 1675°196363yrs
Nov 1776°196363yrs

Oldest-standing record lows

DateRecordSetStanding
Dec 1510°196165yrs
Mar 816°196264yrs
Sep 645°196264yrs
Sep 2033°196264yrs
Sep 2135°196264yrs
Jan 29-1°196363yrs
Feb 235°196363yrs
May 232°196363yrs
May 2336°196363yrs
Jun 2148°196363yrs
Dec 294°196363yrs
Jan 15-7°196462yrs

All-Time Extremes

Hottest ever

105°F
2011-07-22

Coldest ever

-18°F
1984-01-22

Longest heat streak

16 days
≥ 90°F · ended 1995-08-05

The Warming Trend

Sterling-Dulles Airport's annual mean temperature, each year a stripe — blue below the 1991–2020 average, red above.
1962: 52.4°F (-3.3 vs 1991–2020)1963: 53.5°F (-2.2 vs 1991–2020)1964: 54.2°F (-1.5 vs 1991–2020)1965: 54.4°F (-1.3 vs 1991–2020)1966: 52.4°F (-3.3 vs 1991–2020)1967: 52.8°F (-2.9 vs 1991–2020)1968: 53.3°F (-2.4 vs 1991–2020)1969: 52.9°F (-2.8 vs 1991–2020)1970: 52.8°F (-2.9 vs 1991–2020)1971: 54.6°F (-1.1 vs 1991–2020)1972: 53.5°F (-2.2 vs 1991–2020)1973: 55.3°F (-0.4 vs 1991–2020)1974: 54.1°F (-1.6 vs 1991–2020)1975: 53.9°F (-1.8 vs 1991–2020)1976: 51.9°F (-3.8 vs 1991–2020)1977: 54.2°F (-1.5 vs 1991–2020)1978: 53.7°F (-2.0 vs 1991–2020)1979: 53.9°F (-1.8 vs 1991–2020)1980: 54.5°F (-1.2 vs 1991–2020)1981: 53.8°F (-1.9 vs 1991–2020)1982: 55.1°F (-0.6 vs 1991–2020)1983: 53.5°F (-2.2 vs 1991–2020)1984: 53.4°F (-2.3 vs 1991–2020)1985: 55.1°F (-0.6 vs 1991–2020)1986: 54.8°F (-0.9 vs 1991–2020)1987: 54.8°F (-0.9 vs 1991–2020)1988: 54.0°F (-1.7 vs 1991–2020)1989: 53.8°F (-1.9 vs 1991–2020)1990: 57.1°F (+1.4 vs 1991–2020)1991: 56.8°F (+1.1 vs 1991–2020)1992: 53.6°F (-2.1 vs 1991–2020)1993: 54.8°F (-0.9 vs 1991–2020)1994: 55.2°F (-0.5 vs 1991–2020)1995: 54.7°F (-1.0 vs 1991–2020)1996: 53.1°F (-2.6 vs 1991–2020)1997: 53.8°F (-1.9 vs 1991–2020)1998: 57.1°F (+1.4 vs 1991–2020)1999: 55.3°F (-0.4 vs 1991–2020)2000: 53.9°F (-1.8 vs 1991–2020)2001: 55.4°F (-0.3 vs 1991–2020)2002: 56.0°F (+0.3 vs 1991–2020)2003: 53.8°F (-1.9 vs 1991–2020)2004: 55.4°F (-0.3 vs 1991–2020)2005: 55.8°F (+0.1 vs 1991–2020)2006: 57.1°F (+1.4 vs 1991–2020)2007: 57.0°F (+1.3 vs 1991–2020)2008: 55.7°F (-0.0 vs 1991–2020)2009: 55.8°F (+0.1 vs 1991–2020)2010: 56.8°F (+1.1 vs 1991–2020)2011: 57.0°F (+1.3 vs 1991–2020)2012: 57.9°F (+2.2 vs 1991–2020)2013: 55.5°F (-0.2 vs 1991–2020)2014: 53.1°F (-2.6 vs 1991–2020)2015: 55.8°F (+0.1 vs 1991–2020)2016: 57.2°F (+1.5 vs 1991–2020)2017: 57.2°F (+1.5 vs 1991–2020)2018: 56.3°F (+0.6 vs 1991–2020)2019: 57.0°F (+1.3 vs 1991–2020)2020: 57.8°F (+2.1 vs 1991–2020)2021: 57.8°F (+2.1 vs 1991–2020)2022: 56.5°F (+0.8 vs 1991–2020)2023: 58.7°F (+3.0 vs 1991–2020)2024: 58.9°F (+3.2 vs 1991–2020)2025: 56.5°F (+0.8 vs 1991–2020)19622025annual mean temperature · warmer ▲ redder

Days Above / Below the Mark

26 days ≥90°F in 2026 · normal 30 · record 58 in 2010
61 days ≤32°F in 2026 · normal 104 · record 145 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 168°200544°27°-6°1968
Jan 267°200044°27°-7°1968
Jan 369°202344°27°1°2018
Jan 474°199744°27°5°1979
Jan 569°199744°27°5°1970
Jan 671°200744°27°4°1977
Jan 771°200844°27°-1°2018
Jan 870°200844°27°-4°1970
Jan 964°200844°27°-8°1970
Jan 1059°201644°26°0°1982
Jan 1171°197543°26°-5°1988
Jan 1270°201743°26°-4°1977
Jan 1369°200543°26°-3°1977
Jan 1472°199542°25°5°1970
Jan 1568°200742°25°-7°1964
Jan 1665°197442°25°-4°1964
Jan 1770°199042°25°-7°1982
Jan 1870°199042°24°-1°1994
Jan 1965°197242°24°-6°1994
Jan 2063°200642°24°-7°1985
Jan 2163°201841°24°-16°1984
Jan 2268°198641°23°-18°1984
Jan 2372°196741°23°-4°1970
Jan 2473°196742°23°-2°1987
Jan 2573°196742°23°-5°1987
Jan 2679°202442°23°3°1987
Jan 2771°197442°23°-9°1987
Jan 2868°200243°24°-17°1987
Jan 2975°197543°24°-1°1963
Jan 3072°201343°24°2°1965
Jan 3166°201244°24°-7°1965
Feb 175°200244°24°2°1965
Feb 268°199044°24°5°2004
Feb 367°202044°24°1°1965
Feb 470°199144°24°4°1965
Feb 573°199144°24°-10°1996
Feb 671°200844°25°-9°1996
Feb 772°201744°25°-1°1995
Feb 871°201744°25°-6°1967
Feb 971°202345°25°-5°1967
Feb 1065°202344°25°-10°1979
Feb 1171°200945°25°-7°1979
Feb 1274°199945°25°3°1964
Feb 1365°197445°26°-8°1983
Feb 1471°199046°26°-5°1979
Feb 1576°201846°26°6°2015
Feb 1670°197646°27°6°2015
Feb 1775°197646°27°-4°1979
Feb 1875°201147°28°-14°1979
Feb 1971°199747°28°6°2015
Feb 2077°201847°28°-2°1979
Feb 2180°201848°28°7°1968
Feb 2271°199148°28°4°1968
Feb 2380°202348°29°5°1963
Feb 2479°198549°29°-4°2015
Feb 2579°200049°29°6°2015
Feb 2669°197749°29°7°1970
Feb 2774°199749°30°8°1968
Feb 2870°196550°30°10°1993
Feb 2975°197250°30°3°1980
Mar 177°197250°30°11°1980
Mar 277°197251°30°1°2014
Mar 379°197451°30°-1°2014
Mar 471°200852°30°6°1980
Mar 579°197652°30°6°2015
Mar 677°202252°31°2°2015
Mar 777°200953°31°11°1986
Mar 884°200053°31°16°1962
Mar 985°202654°31°14°1996
Mar 1086°202654°32°7°1996
Mar 1189°199054°32°13°1996
Mar 1287°199055°32°16°1998
Mar 1388°199055°33°15°1993
Mar 1482°199055°33°-1°1993
Mar 1584°201255°33°16°1969
Mar 1677°196355°33°16°1970
Mar 1780°198955°34°18°1967
Mar 1876°202255°34°10°1967
Mar 1977°202556°34°18°1981
Mar 2080°202056°35°14°1965
Mar 2186°202656°35°13°1986
Mar 2283°196857°36°12°1988
Mar 2383°201257°36°19°2004
Mar 2479°198858°36°17°1971
Mar 2581°202158°37°17°1983
Mar 2685°199859°37°15°2014
Mar 2786°198959°37°18°2001
Mar 2886°199860°38°20°1982
Mar 2989°199860°38°22°1970
Mar 3085°199861°38°21°1969
Mar 3186°202662°39°17°1964
Apr 186°196762°39°24°1964
Apr 286°198163°39°21°1964
Apr 387°202663°40°22°1965
Apr 488°202364°40°22°1965
Apr 593°201064°40°23°1964
Apr 691°201064°40°21°1977
Apr 787°199165°41°24°1970
Apr 889°200165°41°23°1977
Apr 989°201365°41°19°1985
Apr 1087°197766°42°20°1976
Apr 1187°197766°42°23°1982
Apr 1287°197766°42°24°1990
Apr 1387°202667°43°20°1975
Apr 1491°202667°43°27°1976
Apr 1592°202667°44°28°1981
Apr 1693°200268°44°27°1983
Apr 1789°200268°44°29°2018
Apr 1891°200268°44°27°1990
Apr 1990°200469°45°28°1974
Apr 2089°198569°45°27°2026
Apr 2192°198569°45°27°1975
Apr 2288°199669°45°30°1989
Apr 2386°202669°45°30°1989
Apr 2492°200970°46°29°1969
Apr 2593°196070°46°31°1967
Apr 2692°199070°47°31°1987
Apr 2788°198170°47°31°1972
Apr 2889°201771°47°32°1972
Apr 2991°202471°47°29°1977
Apr 3090°201071°48°32°1976
May 188°201071°48°33°1996
May 292°196572°48°32°1963
May 390°200172°49°31°1967
May 485°198672°49°32°1966
May 590°198672°49°29°1976
May 690°198673°50°28°1970
May 790°200073°50°29°1974
May 891°196373°50°34°1968
May 990°196373°51°30°1976
May 1090°199373°51°29°1966
May 1190°201873°51°34°1969
May 1290°201473°51°36°2020
May 1392°200074°51°32°1976
May 1490°196274°52°32°1996
May 1590°199874°52°36°1973
May 1692°201774°52°34°1983
May 1795°202675°52°30°1984
May 1896°202675°53°36°2002
May 1995°202675°53°36°2002
May 2093°199676°54°37°1992
May 2192°199676°54°31°2002
May 2292°202177°55°37°1968
May 2392°196477°55°36°1963
May 2492°199178°56°36°1967
May 2592°200778°56°38°1967
May 2692°196578°56°41°1972
May 2790°199179°56°37°1972
May 2897°196979°57°38°1992
May 2995°198779°57°42°1965
May 3094°199179°58°38°1996
May 3195°201180°58°37°1984
Jun 193°202380°58°39°1984
Jun 291°200080°58°39°1986
Jun 395°202081°59°40°1977
Jun 492°202181°59°40°1976
Jun 593°202181°59°40°1976
Jun 696°199981°60°39°1976
Jun 797°200781°60°36°1977
Jun 897°201182°60°43°1975
Jun 994°196382°60°45°1980
Jun 1099°196482°61°43°1988
Jun 1196°198683°61°40°1972
Jun 1295°201783°62°44°1972
Jun 1398°199483°62°41°1979
Jun 1499°199484°62°42°1978
Jun 1598°196484°62°47°1978
Jun 1696°202284°63°49°2021
Jun 1794°200684°63°45°1965
Jun 1898°199484°63°45°1986
Jun 1993°198784°63°48°2022
Jun 2097°196484°63°48°2000
Jun 2198°198885°63°48°1963
Jun 22100°202485°64°47°1977
Jun 2398°202485°64°44°1992
Jun 2497°196686°64°44°1979
Jun 2595°199886°64°42°1979
Jun 2699°202486°64°44°1979
Jun 27100°196486°64°44°1970
Jun 2895°198086°65°47°1970
Jun 29102°201286°65°51°1989
Jun 3098°196487°65°51°1989
Jul 198°196687°65°41°1988
Jul 2103°196687°65°44°1988
Jul 399°202687°66°48°1986
Jul 499°199087°65°50°1971
Jul 5102°197787°66°45°1979
Jul 6101°201087°66°47°1970
Jul 7101°198887°66°48°1983
Jul 8101°201288°66°48°1984
Jul 999°198888°66°48°1984
Jul 1099°198888°66°52°1983
Jul 1198°198888°66°47°2002
Jul 1297°196688°66°52°1978
Jul 1398°199388°66°53°2009
Jul 1498°199588°67°53°1981
Jul 1599°202488°67°57°1966
Jul 16104°198888°67°55°2014
Jul 17100°196988°67°51°1985
Jul 18101°201288°67°52°1976
Jul 1998°201988°67°53°1976
Jul 20101°198088°67°48°1966
Jul 21105°201188°67°50°1974
Jul 2299°199188°67°50°1977
Jul 2399°201088°67°48°1985
Jul 2498°201088°67°56°2014
Jul 25100°201688°67°55°1976
Jul 2698°199388°67°50°1976
Jul 2799°199388°67°47°1977
Jul 28103°201188°67°52°2014
Jul 2997°201988°67°48°2014
Jul 3098°198887°66°50°1997
Jul 3199°201187°66°54°1997
Aug 1100°198087°66°52°1998
Aug 2101°202487°66°50°1985
Aug 399°200287°66°50°1976
Aug 499°199587°66°51°1976
Aug 597°202487°66°50°1966
Aug 697°200787°66°49°1994
Aug 7101°200787°66°49°1989
Aug 898°198087°66°47°1989
Aug 997°198087°66°51°1964
Aug 1099°202187°66°52°1972
Aug 11100°202187°66°47°1972
Aug 1299°202187°66°52°1968
Aug 13100°198587°66°49°1983
Aug 1499°198587°65°47°1983
Aug 15102°198886°65°45°1964
Aug 16100°199786°65°44°1979
Aug 17101°198886°65°45°1981
Aug 1895°200286°65°51°1998
Aug 19104°198386°64°47°1998
Aug 2096°196286°64°47°1964
Aug 21101°198386°64°47°1976
Aug 2296°199886°64°47°1981
Aug 2397°199886°64°46°1971
Aug 2497°199885°64°47°1971
Aug 2595°197285°64°48°1977
Aug 26100°198785°64°46°1969
Aug 2798°199385°63°44°1986
Aug 2899°202485°63°38°1982
Aug 2999°199185°63°41°1986
Aug 3098°199185°63°44°1986
Aug 3198°196284°63°43°1976
Sep 198°198084°63°44°1970
Sep 299°198084°63°45°1967
Sep 399°202384°62°48°1997
Sep 499°202383°62°42°1997
Sep 5100°202383°61°47°1982
Sep 697°202383°61°45°1962
Sep 794°201682°61°41°1976
Sep 896°201682°60°40°1986
Sep 999°198382°60°43°1981
Sep 1099°198381°60°44°1967
Sep 1195°196481°59°40°1967
Sep 1294°197480°59°43°1985
Sep 1395°199880°58°37°1985
Sep 1495°199380°58°38°1985
Sep 1597°199180°58°40°1985
Sep 1697°199179°57°35°1986
Sep 1792°197279°57°36°1984
Sep 1893°197778°56°39°1984
Sep 1991°196578°56°36°1984
Sep 2092°196578°56°33°1962
Sep 2194°197077°56°35°1962
Sep 2294°198076°55°33°1983
Sep 2397°201076°55°30°1974
Sep 2493°201076°54°33°1983
Sep 2593°200776°54°38°1983
Sep 2696°199875°54°38°1964
Sep 2786°199875°53°34°1989
Sep 2889°201975°53°34°1978
Sep 2992°198674°52°35°1993
Sep 3090°198674°52°31°1993
Oct 196°201974°52°32°1997
Oct 286°200273°51°30°1974
Oct 390°201373°51°26°1974
Oct 490°196772°50°32°1970
Oct 589°201372°50°29°1965
Oct 691°200771°49°28°1968
Oct 792°200771°49°30°2001
Oct 894°200771°48°26°2001
Oct 987°201771°48°27°1988
Oct 1086°201070°47°31°1972
Oct 1183°199570°47°28°1972
Oct 1284°198969°46°25°1964
Oct 1386°197569°46°28°1981
Oct 1488°198968°45°23°1988
Oct 1585°198968°45°30°1986
Oct 1683°196368°44°31°1981
Oct 1784°201667°44°27°1982
Oct 1885°201667°44°27°1976
Oct 1987°201666°43°24°1981
Oct 2086°197966°43°20°1972
Oct 2185°197966°43°22°1972
Oct 2285°197865°42°21°1969
Oct 2384°200165°42°15°1969
Oct 2481°201265°42°26°1964
Oct 2584°202364°42°26°1987
Oct 2684°196364°41°24°1979
Oct 2786°202363°41°21°1988
Oct 2883°198463°41°20°1969
Oct 2982°198463°40°19°1976
Oct 3084°201662°40°23°1975
Oct 3184°198262°40°21°1968
Nov 184°197161°39°25°2023
Nov 281°198261°39°21°1976
Nov 381°197461°38°21°1966
Nov 481°202260°38°19°1991
Nov 580°201560°38°16°1991
Nov 683°202460°37°22°1982
Nov 780°202459°37°18°1967
Nov 881°202359°37°19°1967
Nov 976°202058°36°19°1976
Nov 1078°200658°36°16°1973
Nov 1176°202457°36°22°1973
Nov 1274°196457°35°19°2019
Nov 1380°198557°35°13°1986
Nov 1481°199356°35°18°1976
Nov 1575°200856°35°14°1967
Nov 1675°196356°35°16°1996
Nov 1776°196355°34°17°1976
Nov 1876°198555°34°13°2014
Nov 1979°198555°34°19°1966
Nov 2076°200755°34°16°1969
Nov 2175°200754°34°14°2014
Nov 2270°199054°34°14°1964
Nov 2374°197954°33°9°1989
Nov 2477°197954°33°14°2000
Nov 2575°199054°33°16°1974
Nov 2670°201153°33°11°1974
Nov 2771°199053°33°20°1967
Nov 2873°199852°33°17°1967
Nov 2972°199152°32°18°1981
Nov 3075°200651°32°4°1967
Dec 175°197051°32°0°1967
Dec 274°199850°31°14°1971
Dec 375°199850°31°7°1976
Dec 477°200149°31°12°1966
Dec 579°199849°30°9°2002
Dec 677°199848°30°1°2002
Dec 772°197848°30°13°2002
Dec 876°198048°30°11°1989
Dec 970°196647°30°4°1989
Dec 1071°197947°30°5°1968
Dec 1172°197947°29°3°1968
Dec 1273°201546°29°9°1988
Dec 1371°198446°29°3°1989
Dec 1471°197146°29°5°1989
Dec 1572°197146°29°10°1961
Dec 1666°200646°29°3°1989
Dec 1776°200646°29°3°1989
Dec 1869°198446°28°-2°1989
Dec 1962°198746°28°8°1991
Dec 2070°201346°28°4°1989
Dec 2171°201346°28°2°1989
Dec 2268°199046°28°4°1980
Dec 2371°201545°27°1°1983
Dec 2471°198246°27°-4°1989
Dec 2571°196445°27°-1°1983
Dec 2673°197145°27°1°1989
Dec 2770°198245°27°8°1966
Dec 2873°198445°27°7°1977
Dec 2978°198445°27°4°1963
Dec 3071°196545°27°1°1993
Dec 3173°199244°27°15°1976
Forecast & records → Sterling-Dulles Airport station On This Day → national almanac
Data: NOAA/NWS Threaded Extremes (threadex) · normals 1991–2020 · part of Weather Trader