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Built 2026-10-19 (19 October 2026)

Assateague Threshold Days by Year (USC00180335)

15 fixed thresholds counted per year at Assateague (USC00180335): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Assateague Thresholds

  • Assateague: days with 10 mm (0.39 in) or more of precipitation in 36 years, most in 1975 with 48.
  • Assateague: days with 25 mm (0.98 in) or more of precipitation in 36 years, most in 1983 with 19.
  • Assateague: days with a maximum temperature at or above 30 C (86 F) in 35 years, most in 2005 with 58.
  • Assateague: days with a maximum temperature at or above 90 F (32.2 C) in 35 years, most in 1987 with 29.
  • 15 fixed thresholds have at least one qualifying day at Assateague.
35 years with a qualifying day
Days at or above 30 C (86 F) per year at Assateague Days per year at Assateague with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 58 in 2005. 02040601969: 241970: 261971: 171972: 101973: 271974: 261975: 261976: 151977: 371978: 271979: 221980: 391981: 431983: 381984: 461986: 511987: 541989: 511990: 251993: 301994: 81995: 381996: 221997: 311998: 431999: 392000: 242001: 272002: 492003: 282005: 582006: 402007: 502008: 572010: 51196919731977198119871994199820022007
Days per year at Assateague with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 58 in 2005.
Days at or above 30 C (86 F) per year at Assateague
YearDaysDecade average
19692424
19702623.3
19711723.3
19721023.3
19732723.3
19742623.3
19752623.3
19761523.3
19773723.3
19782723.3
19792223.3
19803946
19814346
19833846
19844646
19865146
19875446
19895146
19902529.5
19933029.5
1994829.5
19953829.5
19962229.5
19973129.5
19984329.5
19993929.5
20002441.6
20012741.6
20024941.6
20032841.6
20055841.6
20064041.6
20075041.6
20085741.6
20105151
First to last qualifying date each year at Assateague For each year, a bar from the first to the last day at Assateague meeting 30 C (86 F). 1969: 29 May 1969 to 7 September 19691970: 9 May 1970 to 7 October 19701971: 6 June 1971 to 23 August 19711972: 20 July 1972 to 14 September 19721973: 4 June 1973 to 30 September 19731974: 1 May 1974 to 29 September 19741975: 27 May 1975 to 30 August 19751976: 16 April 1976 to 9 September 19761977: 12 April 1977 to 2 October 19771978: 27 June 1978 to 19 September 19781979: 18 June 1979 to 7 September 19791980: 14 May 1980 to 22 September 19801981: 31 May 1981 to 12 September 19811983: 24 June 1983 to 12 September 19831984: 19 May 1984 to 26 September 19841986: 7 May 1986 to 5 October 19861987: 12 May 1987 to 19 September 19871989: 21 May 1989 to 21 September 19891990: 6 June 1990 to 11 September 19901993: 9 June 1993 to 10 September 19931994: 7 July 1994 to 14 September 19941995: 7 June 1995 to 14 September 19951996: 19 May 1996 to 10 September 19961997: 10 June 1997 to 6 October 19971998: 19 May 1998 to 1 October 19981999: 29 May 1999 to 29 August 19992000: 6 May 2000 to 20 September 20002001: 10 June 2001 to 9 September 20012002: 17 April 2002 to 5 October 20022003: 14 June 2003 to 3 September 20032005: 8 June 2005 to 24 September 20052006: 21 June 2006 to 25 September 20062007: 29 May 2007 to 9 October 20072008: 1 June 2008 to 15 September 20082010: 7 April 2010 to 25 September 20101969197419791986199419992005JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Assateague meeting 30 C (86 F).
First to last qualifying date each year at Assateague
YearFirst dateLast date
19691969-05-291969-09-07
19701970-05-091970-10-07
19711971-06-061971-08-23
19721972-07-201972-09-14
19731973-06-041973-09-30
19741974-05-011974-09-29
19751975-05-271975-08-30
19761976-04-161976-09-09
19771977-04-121977-10-02
19781978-06-271978-09-19
19791979-06-181979-09-07
19801980-05-141980-09-22
19811981-05-311981-09-12
19831983-06-241983-09-12
19841984-05-191984-09-26
19861986-05-071986-10-05
19871987-05-121987-09-19
19891989-05-211989-09-21
19901990-06-061990-09-11
19931993-06-091993-09-10
19941994-07-071994-09-14
19951995-06-071995-09-14
19961996-05-191996-09-10
19971997-06-101997-10-06
19981998-05-191998-10-01
19991999-05-291999-08-29
20002000-05-062000-09-20
20012001-06-102001-09-09
20022002-04-172002-10-05
20032003-06-142003-09-03
20052005-06-082005-09-24
20062006-06-212006-09-25
20072007-05-292007-10-09
20082008-06-012008-09-15
20102010-04-072010-09-25

Every Fixed Threshold

Fixed thresholds at Assateague
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3558200551
35 C (95 F): Days271119875
40 C (104 F): Days1119891
90 F (32.2 C): Days3529198722
100 F (37.8 C): Days8219891
0 C (32 F): Ice days (max311719776
0 C (32 F): Frost days (min3495198979
-10 C (14 F): Days with min262719891
20 C (68 F): Tropical nights (min3471199350
25 C (77 F): Days with min20619931
10 mm (0.39 in): Days with 10 mm or more rain3648197527
25 mm (0.98 in): Days with 25 mm or more rain3619198313
50 mm (1.97 in): Days with 50 mm or more rain33719791
100 mm (3.94 in): Days with 100 mm or more rain3219691
10 cm (3.9 in): Days with 10 cm or more snowfall6219692

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1969.

Download the Data

  • Data for Assateague 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 (2025-12-31).