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Built 2026-10-19 (19 October 2026)

Dry Tortugas Threshold Days by Year (USC00082418)

10 fixed thresholds counted per year at Dry Tortugas (USC00082418): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Dry Tortugas Thresholds

  • Dry Tortugas: days with 10 mm (0.39 in) or more of precipitation in 33 years, most in 1995 with 44.
  • Dry Tortugas: days with 25 mm (0.98 in) or more of precipitation in 33 years, most in 1991 with 16.
  • Dry Tortugas: days with 50 mm (1.97 in) or more of precipitation in 32 years, most in 1956 with 6.
  • Dry Tortugas: days with a maximum temperature at or above 30 C (86 F) in 29 years, most in 1989 with 192.
  • 10 fixed thresholds have at least one qualifying day at Dry Tortugas.
29 years with a qualifying day
Days at or above 30 C (86 F) per year at Dry Tortugas Days per year at Dry Tortugas with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 192 in 1989. 0501001502001951: 1241952: 1291953: 1291954: 1151955: 1451956: 1361957: 1351958: 1221959: 1451960: 1381961: 1391962: 1451963: 1491965: 1041986: 1751987: 1441988: 1331989: 1921990: 1611991: 1481992: 1161995: 1642010: 1322011: 1682013: 1402023: 1672024: 1472025: 1482026: 1391951195419571960196319871990199520132025
Days per year at Dry Tortugas with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 192 in 1989.
Days at or above 30 C (86 F) per year at Dry Tortugas
YearDaysDecade average
1951124131.1
1952129131.1
1953129131.1
1954115131.1
1955145131.1
1956136131.1
1957135131.1
1958122131.1
1959145131.1
1960138135
1961139135
1962145135
1963149135
1965104135
1986175161
1987144161
1988133161
1989192161
1990161147.3
1991148147.3
1992116147.3
1995164147.3
2010132146.7
2011168146.7
2013140146.7
2023167150.3
2024147150.3
2025148150.3
2026139150.3
First to last qualifying date each year at Dry Tortugas For each year, a bar from the first to the last day at Dry Tortugas meeting 30 C (86 F). 1951: 4 May 1951 to 12 October 19511952: 10 May 1952 to 15 October 19521953: 11 April 1953 to 30 September 19531954: 1 May 1954 to 16 November 19541955: 15 March 1955 to 5 December 19551956: 7 April 1956 to 17 October 19561957: 12 April 1957 to 15 October 19571958: 4 March 1958 to 9 November 19581959: 20 April 1959 to 31 October 19591960: 3 May 1960 to 1 November 19601961: 8 March 1961 to 14 October 19611962: 12 April 1962 to 23 October 19621963: 20 March 1963 to 8 November 19631965: 15 March 1965 to 16 October 19651986: 15 March 1986 to 13 December 19861987: 2 March 1987 to 11 November 19871988: 5 April 1988 to 7 November 19881989: 3 March 1989 to 16 November 19891990: 20 February 1990 to 24 October 19901991: 15 March 1991 to 23 October 19911992: 8 March 1992 to 12 November 19921995: 2 March 1995 to 11 November 19952010: 4 May 2010 to 4 October 20102011: 31 March 2011 to 20 October 20112013: 17 January 2013 to 3 November 20132023: 5 March 2023 to 22 October 20232024: 17 March 2024 to 9 October 20242025: 1 April 2025 to 8 October 20252026: 11 March 2026 to 13 October 202619511955195919631988199220132026JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Dry Tortugas meeting 30 C (86 F).
First to last qualifying date each year at Dry Tortugas
YearFirst dateLast date
19511951-05-041951-10-12
19521952-05-101952-10-15
19531953-04-111953-09-30
19541954-05-011954-11-16
19551955-03-151955-12-05
19561956-04-071956-10-17
19571957-04-121957-10-15
19581958-03-041958-11-09
19591959-04-201959-10-31
19601960-05-031960-11-01
19611961-03-081961-10-14
19621962-04-121962-10-23
19631963-03-201963-11-08
19651965-03-151965-10-16
19861986-03-151986-12-13
19871987-03-021987-11-11
19881988-04-051988-11-07
19891989-03-031989-11-16
19901990-02-201990-10-24
19911991-03-151991-10-23
19921992-03-081992-11-12
19951995-03-021995-11-11
20102010-05-042010-10-04
20112011-03-312011-10-20
20132013-01-172013-11-03
20232023-03-052023-10-22
20242024-03-172024-10-09
20252025-04-012025-10-08
20262026-03-112026-10-13

Every Fixed Threshold

Fixed thresholds at Dry Tortugas
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days291921989139
35 C (95 F): Days173420232
90 F (32.2 C): Days29143198989
100 F (37.8 C): Days2219922
20 C (68 F): Tropical nights (min283392023222
25 C (77 F): Days with min281782024133
10 mm (0.39 in): Days with 10 mm or more rain3344199512
25 mm (0.98 in): Days with 25 mm or more rain331619914
50 mm (1.97 in): Days with 50 mm or more rain32619563
100 mm (3.94 in): Days with 100 mm or more rain8220242

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1951.

Download the Data

  • Data for Dry Tortugas 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).