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Built 2026-10-19 (19 October 2026)

Key West NAS Threshold Days by Year (USW00012850)

11 fixed thresholds counted per year at Key West NAS (USW00012850): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Key West NAS Thresholds

  • Key West NAS: days with 10 mm (0.39 in) or more of precipitation in 65 years, most in 1994 with 43.
  • Key West NAS: days with 25 mm (0.98 in) or more of precipitation in 65 years, most in 1991 with 22.
  • Key West NAS: days with a maximum temperature at or above 30 C (86 F) in 62 years, most in 2022 with 278.
  • Key West NAS: nights with a minimum temperature at or above 20 C (68 F) in 62 years, most in 2022 with 335.
  • 11 fixed thresholds have at least one qualifying day at Key West NAS.
62 years with a qualifying day
Days at or above 30 C (86 F) per year at Key West NAS Days per year at Key West NAS with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 278 in 2022. 01002003001954: 1301955: 931956: 851957: 1121958: 1111959: 1161960: 1201961: 1281962: 1141963: 1131964: 1241965: 1651966: 1061967: 1591968: 1311969: 1711970: 1051971: 1301972: 1361973: 1411974: 1341975: 1831976: 1511977: 1461978: 1581979: 1401980: 1491981: 1321982: 1301983: 1361984: 1301985: 1301986: 1461987: 1231988: 1441989: 1691990: 1541991: 1471992: 1381993: 1551994: 2151995: 1571996: 1411997: 1661998: 1542001: 1262002: 1512005: 1302009: 1842010: 1732011: 1932014: 1612015: 1952016: 1562018: 1732019: 2202020: 2372021: 1722022: 2782024: 2172025: 1882026: 109195419611968197519821989199620102020
Days per year at Key West NAS with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 278 in 2022.
Days at or above 30 C (86 F) per year at Key West NAS
YearDaysDecade average
1954130107.8
195593107.8
195685107.8
1957112107.8
1958111107.8
1959116107.8
1960120133.1
1961128133.1
1962114133.1
1963113133.1
1964124133.1
1965165133.1
1966106133.1
1967159133.1
1968131133.1
1969171133.1
1970105142.4
1971130142.4
1972136142.4
1973141142.4
1974134142.4
1975183142.4
1976151142.4
1977146142.4
1978158142.4
1979140142.4
1980149138.9
1981132138.9
1982130138.9
1983136138.9
1984130138.9
1985130138.9
1986146138.9
1987123138.9
1988144138.9
1989169138.9
1990154158.6
1991147158.6
1992138158.6
1993155158.6
1994215158.6
1995157158.6
1996141158.6
1997166158.6
1998154158.6
2001126147.8
2002151147.8
2005130147.8
2009184147.8
2010173181.6
2011193181.6
2014161181.6
2015195181.6
2016156181.6
2018173181.6
2019220181.6
2020237200.2
2021172200.2
2022278200.2
2024217200.2
2025188200.2
2026109200.2
First to last qualifying date each year at Key West NAS For each year, a bar from the first to the last day at Key West NAS meeting 30 C (86 F). 1954: 1 April 1954 to 5 October 19541955: 16 May 1955 to 8 October 19551956: 18 May 1956 to 9 October 19561957: 19 May 1957 to 8 October 19571958: 21 May 1958 to 9 November 19581959: 31 March 1959 to 28 October 19591960: 21 May 1960 to 31 October 19601961: 17 May 1961 to 13 October 19611962: 26 April 1962 to 15 October 19621963: 27 May 1963 to 3 October 19631964: 28 April 1964 to 5 October 19641965: 18 March 1965 to 11 October 19651966: 21 May 1966 to 23 October 19661967: 21 February 1967 to 29 October 19671968: 11 March 1968 to 10 October 19681969: 3 April 1969 to 31 October 19691970: 3 April 1970 to 30 October 19701971: 25 April 1971 to 3 November 19711972: 11 May 1972 to 14 December 19721973: 2 April 1973 to 28 November 19731974: 29 March 1974 to 17 October 19741975: 17 March 1975 to 4 November 19751976: 27 April 1976 to 29 November 19761977: 14 March 1977 to 16 December 19771978: 14 April 1978 to 11 November 19781979: 28 April 1979 to 3 November 19791980: 14 May 1980 to 31 October 19801981: 17 May 1981 to 27 October 19811982: 10 April 1982 to 15 October 19821983: 4 May 1983 to 24 October 19831984: 12 April 1984 to 31 October 19841985: 14 April 1985 to 2 December 19851986: 29 April 1986 to 6 November 19861987: 11 May 1987 to 10 November 19871988: 22 April 1988 to 18 November 19881989: 3 April 1989 to 9 November 19891990: 19 April 1990 to 9 November 19901991: 24 February 1991 to 24 October 19911992: 30 May 1992 to 7 November 19921993: 14 May 1993 to 16 November 19931994: 20 March 1994 to 7 December 19941995: 24 April 1995 to 2 November 19951996: 7 April 1996 to 7 November 19961997: 21 February 1997 to 14 November 19971998: 4 April 1998 to 21 October 19982001: 12 April 2001 to 25 October 20012002: 25 April 2002 to 6 November 20022005: 2 May 2005 to 6 November 20052009: 3 April 2009 to 15 December 20092010: 24 April 2010 to 17 November 20102011: 27 March 2011 to 14 October 20112014: 7 April 2014 to 29 October 20142015: 25 March 2015 to 30 December 20152016: 1 April 2016 to 19 October 20162018: 10 April 2018 to 4 December 20182019: 18 February 2019 to 16 December 20192020: 12 February 2020 to 30 November 20202021: 30 March 2021 to 30 December 20212022: 1 January 2022 to 30 December 20222024: 5 March 2024 to 5 December 20242025: 10 March 2025 to 9 November 20252026: 2 May 2026 to 12 October 202619541962197019781986199420092020JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Key West NAS meeting 30 C (86 F).
First to last qualifying date each year at Key West NAS
YearFirst dateLast date
19541954-04-011954-10-05
19551955-05-161955-10-08
19561956-05-181956-10-09
19571957-05-191957-10-08
19581958-05-211958-11-09
19591959-03-311959-10-28
19601960-05-211960-10-31
19611961-05-171961-10-13
19621962-04-261962-10-15
19631963-05-271963-10-03
19641964-04-281964-10-05
19651965-03-181965-10-11
19661966-05-211966-10-23
19671967-02-211967-10-29
19681968-03-111968-10-10
19691969-04-031969-10-31
19701970-04-031970-10-30
19711971-04-251971-11-03
19721972-05-111972-12-14
19731973-04-021973-11-28
19741974-03-291974-10-17
19751975-03-171975-11-04
19761976-04-271976-11-29
19771977-03-141977-12-16
19781978-04-141978-11-11
19791979-04-281979-11-03
19801980-05-141980-10-31
19811981-05-171981-10-27
19821982-04-101982-10-15
19831983-05-041983-10-24
19841984-04-121984-10-31
19851985-04-141985-12-02
19861986-04-291986-11-06
19871987-05-111987-11-10
19881988-04-221988-11-18
19891989-04-031989-11-09
19901990-04-191990-11-09
19911991-02-241991-10-24
19921992-05-301992-11-07
19931993-05-141993-11-16
19941994-03-201994-12-07
19951995-04-241995-11-02
19961996-04-071996-11-07
19971997-02-211997-11-14
19981998-04-041998-10-21
20012001-04-122001-10-25
20022002-04-252002-11-06
20052005-05-022005-11-06
20092009-04-032009-12-15
20102010-04-242010-11-17
20112011-03-272011-10-14
20142014-04-072014-10-29
20152015-03-252015-12-30
20162016-04-012016-10-19
20182018-04-102018-12-04
20192019-02-182019-12-16
20202020-02-122020-11-30
20212021-03-302021-12-30
20222022-01-012022-12-30
20242024-03-052024-12-05
20252025-03-102025-11-09
20262026-05-022026-10-12

Every Fixed Threshold

Fixed thresholds at Key West NAS
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days622782022109
35 C (95 F): Days126620221
90 F (32.2 C): Days61199202236
100 F (37.8 C): Days1320243
20 C (68 F): Tropical nights (min623352022191
25 C (77 F): Days with min622592022109
10 mm (0.39 in): Days with 10 mm or more rain654319948
25 mm (0.98 in): Days with 25 mm or more rain652219912
50 mm (1.97 in): Days with 50 mm or more rain61919911
100 mm (3.94 in): Days with 100 mm or more rain33319831
200 mm (7.87 in): Days with 200 mm or more rain1320053

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1954.

Download the Data

  • Data for Key West NAS 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).