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Built 2026-10-19 (19 October 2026)

Nantucket Mem AP Threshold Days by Year (USW00014756)

15 fixed thresholds counted per year at Nantucket Mem AP (USW00014756): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Nantucket Mem AP Thresholds

  • Nantucket Mem AP: days with a maximum temperature at or below 0 C (32 F) in 61 years, most in 1978 with 33.
  • Nantucket Mem AP: nights with a minimum temperature at or below 0 C (32 F) in 61 years, most in 1965 with 127.
  • Nantucket Mem AP: days with 10 mm (0.39 in) or more of precipitation in 59 years, most in 1958 with 55.
  • Nantucket Mem AP: days with 25 mm (0.98 in) or more of precipitation in 59 years, most in 1953 with 21.
  • 15 fixed thresholds have at least one qualifying day at Nantucket Mem AP.
38 years with a qualifying day
Days at or above 30 C (86 F) per year at Nantucket Mem AP Days per year at Nantucket Mem AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 7 in 1975. 024681948: 41949: 41952: 61953: 11955: 11956: 11957: 11959: 11963: 31964: 11966: 11968: 41969: 21970: 11971: 41972: 11973: 21975: 71976: 21977: 51978: 11979: 21981: 11999: 32001: 12002: 32005: 22006: 22010: 52011: 22012: 42013: 22015: 22018: 52019: 22022: 72025: 22026: 21948195519631969197319782001201020152025
Days per year at Nantucket Mem AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 7 in 1975.
Days at or above 30 C (86 F) per year at Nantucket Mem AP
YearDaysDecade average
194844
194944
195261.8
195311.8
195511.8
195611.8
195711.8
195911.8
196332.2
196412.2
196612.2
196842.2
196922.2
197012.8
197142.8
197212.8
197322.8
197572.8
197622.8
197752.8
197812.8
197922.8
198111
199933
200112
200232
200522
200622
201053.1
201123.1
201243.1
201323.1
201523.1
201853.1
201923.1
202273.7
202523.7
202623.7
First to last qualifying date each year at Nantucket Mem AP For each year, a bar from the first to the last day at Nantucket Mem AP meeting 30 C (86 F). 1948: 26 August 1948 to 29 August 19481949: 29 July 1949 to 11 August 19491952: 6 July 1952 to 24 July 19521953: 30 August 1953 to 30 August 19531955: 2 August 1955 to 2 August 19551956: 16 June 1956 to 16 June 19561957: 16 June 1957 to 16 June 19571959: 30 June 1959 to 30 June 19591963: 26 June 1963 to 19 July 19631964: 1 July 1964 to 1 July 19641966: 4 July 1966 to 4 July 19661968: 6 June 1968 to 21 August 19681969: 29 June 1969 to 18 July 19691970: 24 July 1970 to 24 July 19701971: 27 June 1971 to 9 September 19711972: 26 August 1972 to 26 August 19721973: 30 August 1973 to 31 August 19731975: 3 July 1975 to 27 August 19751976: 21 August 1976 to 22 August 19761977: 18 July 1977 to 6 September 19771978: 28 June 1978 to 28 June 19781979: 16 July 1979 to 5 August 19791981: 9 July 1981 to 9 July 19811999: 6 July 1999 to 29 July 19992001: 8 August 2001 to 8 August 20012002: 18 July 2002 to 1 August 20022005: 20 July 2005 to 3 August 20052006: 2 August 2006 to 3 August 20062010: 4 July 2010 to 1 September 20102011: 23 July 2011 to 30 July 20112012: 21 June 2012 to 14 July 20122013: 16 July 2013 to 18 July 20132015: 29 July 2015 to 31 July 20152018: 1 July 2018 to 4 September 20182019: 20 July 2019 to 21 July 20192022: 13 July 2022 to 11 September 20222025: 25 June 2025 to 30 July 20252026: 3 July 2026 to 4 July 202619481956196619721978200220122022JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Nantucket Mem AP meeting 30 C (86 F).
First to last qualifying date each year at Nantucket Mem AP
YearFirst dateLast date
19481948-08-261948-08-29
19491949-07-291949-08-11
19521952-07-061952-07-24
19531953-08-301953-08-30
19551955-08-021955-08-02
19561956-06-161956-06-16
19571957-06-161957-06-16
19591959-06-301959-06-30
19631963-06-261963-07-19
19641964-07-011964-07-01
19661966-07-041966-07-04
19681968-06-061968-08-21
19691969-06-291969-07-18
19701970-07-241970-07-24
19711971-06-271971-09-09
19721972-08-261972-08-26
19731973-08-301973-08-31
19751975-07-031975-08-27
19761976-08-211976-08-22
19771977-07-181977-09-06
19781978-06-281978-06-28
19791979-07-161979-08-05
19811981-07-091981-07-09
19991999-07-061999-07-29
20012001-08-082001-08-08
20022002-07-182002-08-01
20052005-07-202005-08-03
20062006-08-022006-08-03
20102010-07-042010-09-01
20112011-07-232011-07-30
20122012-06-212012-07-14
20132013-07-162013-07-18
20152015-07-292015-07-31
20182018-07-012018-09-04
20192019-07-202019-07-21
20222022-07-132022-09-11
20252025-06-252025-07-30
20262026-07-032026-07-04

Every Fixed Threshold

Fixed thresholds at Nantucket Mem AP
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days38719752
35 C (95 F): Days2219752
90 F (32.2 C): Days15319481
100 F (37.8 C): Days1119751
0 C (32 F): Ice days (max6133197819
0 C (32 F): Frost days (min61127196571
-10 C (14 F): Days with min542819688
20 C (68 F): Tropical nights (min5537202210
25 C (77 F): Days with min1220222
10 mm (0.39 in): Days with 10 mm or more rain5955195815
25 mm (0.98 in): Days with 25 mm or more rain592119534
50 mm (1.97 in): Days with 50 mm or more rain43519481
100 mm (3.94 in): Days with 100 mm or more rain7219691
10 cm (3.9 in): Days with 10 cm or more snowfall23619601
25 cm (9.8 in): Days with 25 cm or more snowfall7319601

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1948.

Download the Data

  • Data for Nantucket Mem AP 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 (2026-10-17).