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Built 2026-10-15 (15 October 2026)

Assateague Island Maryland Weather Records (USR0000MASS)

Record envelope, standing records and threshold days for Assateague Island Maryland (USR0000MASS), Maryland, United States, with 31 years of record.

Key Facts for Assateague Island Maryland

  • Assateague Island Maryland (USR0000MASS) is a weather station in Maryland, United States at 38.07 latitude and -75.20 longitude, 4 m (12 ft) above sea level.
  • The station reports from 1993 to 2023, 31 years of record.
  • 1,464 records set at Assateague Island Maryland still stand.
  • Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
  • Assateague Island Maryland tied a daily record high minimum temperature of 20.0 C (68.0 F) on 11 October 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: Maryland, United States, 38.07 latitude, -75.20 longitude.
  • Elevation: 4 m (12 ft).
  • Period of record: 1993 to 2023, 31 years.
  • Eligible elements: tmax, tmin.

Daily Record Envelope and 2026

15 days at or beyond a record
Daily record high and record low at Assateague Island Maryland, with 2026 drawn through them The band shows the record high and record low for each calendar day at Assateague Island Maryland. The lines show the 2026 daily maximum and minimum. 15 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Assateague Island Maryland. The lines show the 2026 daily maximum and minimum. 15 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Assateague Island Maryland, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan23.3 C (73.9 F)-17.2 C (1.0 F)17.2 C (63.0 F)-10.6 C (12.9 F)
Feb24.4 C (75.9 F)-15.0 C (5.0 F)13.9 C (57.0 F)-10.0 C (14.0 F)
Mar29.4 C (84.9 F)-8.9 C (16.0 F)22.8 C (73.0 F)-1.1 C (30.0 F)
Apr32.2 C (90.0 F)-1.1 C (30.0 F)27.8 C (82.0 F)3.9 C (39.0 F)
May36.1 C (97.0 F)1.7 C (35.1 F)29.4 C (84.9 F)8.3 C (46.9 F)
Jun36.1 C (97.0 F)8.3 C (46.9 F)35.0 C (95.0 F)11.1 C (52.0 F)
Jul38.9 C (102.0 F)10.0 C (50.0 F)35.0 C (95.0 F)16.1 C (61.0 F)
Aug38.3 C (100.9 F)11.1 C (52.0 F)33.9 C (93.0 F)20.0 C (68.0 F)
Sep34.4 C (93.9 F)6.1 C (43.0 F)32.8 C (91.0 F)13.3 C (55.9 F)
Oct33.3 C (91.9 F)0.6 C (33.1 F)27.8 C (82.0 F)7.2 C (45.0 F)
Nov27.2 C (81.0 F)-5.0 C (23.0 F)n/an/a
Dec24.4 C (75.9 F)-12.2 C (10.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Assateague Island Maryland by the year they were set 1,464 records at Assateague Island Maryland still stand. 2002 holds the most, with 69. 0204060801993: 361994: 431995: 431996: 541997: 511998: 591999: 522000: 512001: 512002: 692003: 462004: 252005: 342006: 422007: 632008: 412009: 422010: 522011: 362012: 612013: 242014: 472015: 612016: 482017: 412018: 462019: 332020: 492021: 322022: 262023: 322024: 212025: 332026: 20199319972001200520092013201720212025
1,464 records at Assateague Island Maryland still stand. 2002 holds the most, with 69.
Standing records at Assateague Island Maryland by the year they were set
Year setStanding records
199336
199443
199543
199654
199751
199859
199952
200051
200151
200269
200346
200425
200534
200642
200763
200841
200942
201052
201136
201261
201324
201447
201561
201648
201741
201846
201933
202049
202132
202226
202332
202421
202533
202620

Period of Record Coverage

1993 to 2026
Days with data per year at Assateague Island Maryland 34 years of record at Assateague Island Maryland, 1993 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1993, 2026. 1993: 214 of 365 days1994: 341 of 365 days1995: 359 of 365 days1996: 363 of 366 days1997: 361 of 365 days1998: 362 of 365 days1999: 361 of 365 days2000: 342 of 366 days2001: 363 of 365 days2002: 363 of 365 days2003: 365 of 365 days2004: 363 of 366 days2005: 365 of 365 days2006: 361 of 365 days2007: 365 of 365 days2008: 364 of 366 days2009: 364 of 365 days2010: 362 of 365 days2011: 361 of 365 days2012: 349 of 366 days2013: 364 of 365 days2014: 361 of 365 days2015: 363 of 365 days2016: 364 of 366 days2017: 364 of 365 days2018: 362 of 365 days2019: 363 of 365 days2020: 366 of 366 days2021: 365 of 365 days2022: 364 of 365 days2023: 364 of 365 days2024: 365 of 366 days2025: 364 of 365 days2026: 283 of 365 days1995200020052010201520202025
34 years of record at Assateague Island Maryland, 1993 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1993, 2026.
Days with data per year at Assateague Island Maryland
YearDays with dataShare of yearComplete
199321459%No
199434193%Yes
199535998%Yes
199636399%Yes
199736199%Yes
199836299%Yes
199936199%Yes
200034293%Yes
200136399%Yes
200236399%Yes
2003365100%Yes
200436399%Yes
2005365100%Yes
200636199%Yes
2007365100%Yes
200836499%Yes
2009364100%Yes
201036299%Yes
201136199%Yes
201234995%Yes
2013364100%Yes
201436199%Yes
201536399%Yes
201636499%Yes
2017364100%Yes
201836299%Yes
201936399%Yes
2020366100%Yes
2021365100%Yes
2022364100%Yes
2023364100%Yes
2024365100%Yes
2025364100%Yes
202628378%No

Latest Records

20
Latest records at Assateague Island Maryland
DateStationRecordValueBeat old record byOld record stoodSignificance
11 October 2026Assateague Island Maryland, USdaily high min (Tie, Provisional)20.0 C (68.0 F)tie8 years1 of 100 (Routine)
6 October 2026Assateague Island Maryland, USdaily low max (Provisional)17.2 C (63.0 F)0.6 C (1.1 F)32 years13 of 100 (Routine)
28 September 2026Assateague Island Maryland, USdaily low max (Provisional)19.4 C (66.9 F)0.6 C (1.1 F)24 years12 of 100 (Routine)
27 September 2026Assateague Island Maryland, USdaily low max (Provisional)16.1 C (61.0 F)3.3 C (5.9 F)3 years14 of 100 (Routine)
26 September 2026Assateague Island Maryland, USdaily low max (Tie, Provisional)16.7 C (62.1 F)tie24 years2 of 100 (Routine)
25 September 2026Assateague Island Maryland, USdaily low max (Tie, Provisional)20.0 C (68.0 F)tie25 years2 of 100 (Routine)
20 September 2026Assateague Island Maryland, USdaily high min (Provisional)23.3 C (73.9 F)0.5 C (0.9 F)20 years10 of 100 (Routine)
18 September 2026Assateague Island Maryland, USdaily high min (Provisional)23.9 C (75.0 F)0.6 C (1.1 F)9 years6 of 100 (Routine)
18 September 2026Assateague Island Maryland, USdaily high max (Tie, Provisional)30.0 C (86.0 F)tie8 years1 of 100 (Routine)
13 September 2026Assateague Island Maryland, USdaily high min (Tie, Provisional)23.3 C (73.9 F)tie8 years1 of 100 (Routine)
11 September 2026Assateague Island Maryland, USdaily high min (Tie, Provisional)23.9 C (75.0 F)tie19 years2 of 100 (Routine)
10 September 2026Assateague Island Maryland, USdaily high max (Provisional)32.2 C (90.0 F)0.5 C (0.9 F)29 years12 of 100 (Routine)
1 September 2026Assateague Island Maryland, USdaily high min (Tie, Provisional)25.0 C (77.0 F)tie32 years3 of 100 (Routine)
14 August 2026Assateague Island Maryland, USdaily high min (Tie)23.9 C (75.0 F)tie24 years2 of 100 (Routine)
9 August 2026Assateague Island Maryland, USdaily high max (Tie)33.9 C (93.0 F)tie16 years2 of 100 (Routine)
16 July 2026Assateague Island Maryland, USdaily high min26.1 C (79.0 F)1.1 C (2.0 F)13 years11 of 100 (Routine)
3 July 2026Assateague Island Maryland, USdaily high max34.4 C (93.9 F)0.5 C (0.9 F)5 years5 of 100 (Routine)
13 June 2026Assateague Island Maryland, USdaily high min (Tie)21.1 C (70.0 F)tie0 years0 of 100 (Routine)
12 June 2026Assateague Island Maryland, USdaily high min23.9 C (75.0 F)1.1 C (2.0 F)9 years8 of 100 (Routine)
11 June 2026Assateague Island Maryland, USdaily high max35.0 C (95.0 F)3.9 C (7.0 F)32 years22 of 100 (Routine)

Climate Trend

29 complete years, 1995 to 2025
Annual mean temperature at Assateague Island Maryland as warming stripes, 1995 to 2025 One stripe for each of 29 complete years at Assateague Island Maryland, 1995 to 2025. Blue stripes are years cooler than the station's own mean of 14.4 C (58.0 F); red stripes are warmer. The coolest year was 1996, at 13.1 C (55.6 F), and the warmest was 2023, at 15.5 C (59.9 F). The strongest colour marks a difference of 1.3 C (2.3 F). 1995: 14.0 C, -0.5 C from the station mean1996: 13.1 C, -1.3 C from the station mean1997: 13.8 C, -0.7 C from the station mean1998: 15.0 C, +0.5 C from the station mean1999: 14.8 C, +0.3 C from the station mean2001: 14.4 C, 0.0 C from the station mean2002: 14.9 C, +0.5 C from the station mean2003: 13.4 C, -1.1 C from the station mean2004: 14.0 C, -0.4 C from the station mean2005: 14.0 C, -0.5 C from the station mean2006: 14.7 C, +0.3 C from the station mean2007: 14.4 C, 0.0 C from the station mean2008: 14.5 C, +0.1 C from the station mean2009: 14.0 C, -0.4 C from the station mean2010: 14.2 C, -0.2 C from the station mean2011: 14.8 C, +0.4 C from the station mean2013: 13.7 C, -0.8 C from the station mean2014: 13.5 C, -1.0 C from the station mean2015: 14.4 C, 0.0 C from the station mean2016: 14.8 C, +0.4 C from the station mean2017: 14.9 C, +0.5 C from the station mean2018: 14.5 C, +0.1 C from the station mean2019: 15.0 C, +0.6 C from the station mean2020: 15.4 C, +1.0 C from the station mean2021: 15.1 C, +0.7 C from the station mean2022: 14.4 C, 0.0 C from the station mean2023: 15.5 C, +1.1 C from the station mean2024: 14.7 C, +0.3 C from the station mean2025: 14.4 C, 0.0 C from the station mean1995200020052010201520202025
One stripe for each of 29 complete years at Assateague Island Maryland, 1995 to 2025. Blue stripes are years cooler than the station's own mean of 14.4 C (58.0 F); red stripes are warmer. The coolest year was 1996, at 13.1 C (55.6 F), and the warmest was 2023, at 15.5 C (59.9 F). The strongest colour marks a difference of 1.3 C (2.3 F).
Annual mean temperature at Assateague Island Maryland as warming stripes, 1995 to 2025
YearAnnual mean temperatureDifference from the station mean
199514.0 C-0.47 C
199613.1 C-1.29 C
199713.8 C-0.66 C
199815.0 C+0.53 C
199914.8 C+0.33 C
200114.4 C+0.01 C
200214.9 C+0.51 C
200313.4 C-1.05 C
200414.0 C-0.40 C
200514.0 C-0.47 C
200614.7 C+0.30 C
200714.4 C+0.02 C
200814.5 C+0.07 C
200914.0 C-0.44 C
201014.2 C-0.18 C
201114.8 C+0.40 C
201313.7 C-0.77 C
201413.5 C-0.96 C
201514.4 C-0.01 C
201614.8 C+0.37 C
201714.9 C+0.47 C
201814.5 C+0.12 C
201915.0 C+0.61 C
202015.4 C+0.96 C
202115.1 C+0.71 C
202214.4 C+0.02 C
202315.5 C+1.08 C
202414.7 C+0.28 C
202514.4 C+0.01 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1993 to 2026
Yearly extremes at Assateague Island Maryland: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)38.9 C (102.0 F)199935.6 C (96.1 F)34
Coldest night (TNn)-17.2 C (1.0 F)1994-10.3 C (13.5 F)34

Hottest day (TXx)

Hottest day (TXx) at Assateague Island Maryland by year The hottest day of the year at Assateague Island Maryland, 1993 to 2026. The record is 38.9 C (102.0 F) in 1999, marked on the chart; the median year is 35.6 C (96.1 F). 3234363840200020102020Record: 38.9 C (102.0 F) in 1999
The hottest day of the year at Assateague Island Maryland, 1993 to 2026. The record is 38.9 C (102.0 F) in 1999, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Assateague Island Maryland by year
YearHottest day (TXx)
199336.7 C (98.1 F)
199435.0 C (95.0 F)
199536.7 C (98.1 F)
199636.1 C (97.0 F)
199735.6 C (96.1 F)
199837.2 C (99.0 F)
199938.9 C (102.0 F)
200034.4 C (93.9 F)
200135.0 C (95.0 F)
200236.1 C (97.0 F)
200335.6 C (96.1 F)
200434.4 C (93.9 F)
200534.4 C (93.9 F)
200637.8 C (100.0 F)
200738.3 C (100.9 F)
200836.1 C (97.0 F)
200935.6 C (96.1 F)
201037.8 C (100.0 F)
201137.8 C (100.0 F)
201238.3 C (100.9 F)
201333.3 C (91.9 F)
201436.1 C (97.0 F)
201535.0 C (95.0 F)
201635.0 C (95.0 F)
201734.1 C (93.4 F)
201833.9 C (93.0 F)
201937.2 C (99.0 F)
202037.2 C (99.0 F)
202133.3 C (91.9 F)
202234.4 C (93.9 F)
202334.4 C (93.9 F)
202432.8 C (91.0 F)
202535.6 C (96.1 F)
202635.0 C (95.0 F)

Coldest night (TNn)

Coldest night (TNn) at Assateague Island Maryland by year The coldest night of the year at Assateague Island Maryland, 1993 to 2026. The record is -17.2 C (1.0 F) in 1994, marked on the chart; the median year is -10.3 C (13.5 F). -20-15-10-50200020102020Record: -17.2 C (1.0 F) in 1994
The coldest night of the year at Assateague Island Maryland, 1993 to 2026. The record is -17.2 C (1.0 F) in 1994, marked on the chart; the median year is -10.3 C (13.5 F).
Coldest night (TNn) at Assateague Island Maryland by year
YearColdest night (TNn)
1993-12.2 C (10.0 F)
1994-17.2 C (1.0 F)
1995-12.2 C (10.0 F)
1996-13.9 C (7.0 F)
1997-12.8 C (9.0 F)
1998-6.7 C (19.9 F)
1999-12.2 C (10.0 F)
2000-1.7 C (28.9 F)
2001-8.3 C (17.1 F)
2002-7.2 C (19.0 F)
2003-13.9 C (7.0 F)
2004-10.6 C (12.9 F)
2005-10.6 C (12.9 F)
2006-7.8 C (18.0 F)
2007-11.1 C (12.0 F)
2008-10.0 C (14.0 F)
2009-12.2 C (10.0 F)
2010-8.9 C (16.0 F)
2011-11.7 C (10.9 F)
2012-7.2 C (19.0 F)
2013-8.3 C (17.1 F)
2014-12.8 C (9.0 F)
2015-15.0 C (5.0 F)
2016-10.0 C (14.0 F)
2017-9.4 C (15.1 F)
2018-14.4 C (6.1 F)
2019-10.6 C (12.9 F)
2020-4.4 C (24.1 F)
2021-4.4 C (24.1 F)
2022-9.4 C (15.1 F)
2023-7.8 C (18.0 F)
2024-7.2 C (19.0 F)
2025-8.9 C (16.0 F)
2026-10.6 C (12.9 F)

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

28 years with a frost

Across 28 years with a frost, the median last spring frost at Assateague Island Maryland falls on 24 March and the median first autumn frost on 20 November, which leaves a median of 240 days between them.

Fitted over all years, the growing season changes by +11.4 days per decade at this station.

Frost dates and growing season at Assateague Island Maryland
MeasureMedian, all yearsEarliest periodRecent period (1995 to 2025)Recent against earliestFitted trend
Last spring frost24 Marchn/a24 Marchn/a-8.4 days per decade
First autumn frost20 Novembern/a20 Novembern/a+3.0 days per decade
Growing days240 daysn/a240 daysn/a+11.4 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Download the Data

  • Data for Assateague Island Maryland standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Assateague Island Maryland 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-13).