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Built 2026-10-19 (19 October 2026)

Ellsworth Threshold Days by Year (USC00172620)

16 fixed thresholds counted per year at Ellsworth (USC00172620): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ellsworth Thresholds

  • Ellsworth: days with 10 mm (0.39 in) or more of precipitation in 65 years, most in 1973 with 52.
  • Ellsworth: days with 25 mm (0.98 in) or more of precipitation in 65 years, most in 1973 with 20.
  • Ellsworth: days with 50 mm (1.97 in) or more of precipitation in 46 years, most in 1969 with 6.
  • Ellsworth: nights with a minimum temperature at or below 0 C (32 F) in 28 years, most in 1972 with 179.
  • 16 fixed thresholds have at least one qualifying day at Ellsworth.
26 years with a qualifying day
Days at or above 30 C (86 F) per year at Ellsworth Days per year at Ellsworth with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 19 in 1991. 051015201963: 101964: 41965: 81966: 41967: 41968: 91969: 81970: 121971: 71972: 11973: 131974: 81975: 101978: 131979: 101980: 91981: 101985: 71986: 21987: 71988: 161989: 81990: 101991: 191992: 51993: 14196319661969197219751980198619891992
Days per year at Ellsworth with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 19 in 1991.
Days at or above 30 C (86 F) per year at Ellsworth
YearDaysDecade average
1963106.7
196446.7
196586.7
196646.7
196746.7
196896.7
196986.7
1970129.3
197179.3
197219.3
1973139.3
197489.3
1975109.3
1978139.3
1979109.3
198098.4
1981108.4
198578.4
198628.4
198778.4
1988168.4
198988.4
19901012
19911912
1992512
19931412
First to last qualifying date each year at Ellsworth For each year, a bar from the first to the last day at Ellsworth meeting 30 C (86 F). 1963: 24 June 1963 to 28 July 19631964: 24 May 1964 to 27 July 19641965: 22 June 1965 to 7 August 19651966: 27 June 1966 to 19 August 19661967: 10 June 1967 to 11 July 19671968: 6 June 1968 to 4 August 19681969: 28 June 1969 to 2 September 19691970: 23 July 1970 to 16 August 19701971: 30 June 1971 to 5 September 19711972: 12 July 1972 to 12 July 19721973: 11 June 1973 to 3 September 19731974: 9 June 1974 to 19 August 19741975: 23 June 1975 to 14 August 19751978: 29 June 1978 to 23 August 19781979: 10 May 1979 to 6 August 19791980: 25 June 1980 to 24 August 19801981: 7 July 1981 to 22 August 19811985: 20 July 1985 to 15 August 19851986: 8 July 1986 to 23 July 19861987: 31 May 1987 to 20 August 19871988: 13 June 1988 to 13 August 19881989: 21 June 1989 to 27 July 19891990: 15 July 1990 to 26 August 19901991: 12 May 1991 to 17 August 19911992: 21 May 1992 to 26 August 19921993: 14 June 1993 to 29 August 19931963196719711975198119881992JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Ellsworth meeting 30 C (86 F).
First to last qualifying date each year at Ellsworth
YearFirst dateLast date
19631963-06-241963-07-28
19641964-05-241964-07-27
19651965-06-221965-08-07
19661966-06-271966-08-19
19671967-06-101967-07-11
19681968-06-061968-08-04
19691969-06-281969-09-02
19701970-07-231970-08-16
19711971-06-301971-09-05
19721972-07-121972-07-12
19731973-06-111973-09-03
19741974-06-091974-08-19
19751975-06-231975-08-14
19781978-06-291978-08-23
19791979-05-101979-08-06
19801980-06-251980-08-24
19811981-07-071981-08-22
19851985-07-201985-08-15
19861986-07-081986-07-23
19871987-05-311987-08-20
19881988-06-131988-08-13
19891989-06-211989-07-27
19901990-07-151990-08-26
19911991-05-121991-08-17
19921992-05-211992-08-26
19931993-06-141993-08-29

Every Fixed Threshold

Fixed thresholds at Ellsworth
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2619199114
35 C (95 F): Days4119631
90 F (32.2 C): Days22819938
100 F (37.8 C): Days1119751
0 C (32 F): Ice days (max2669197054
0 C (32 F): Frost days (min281791972117
-10 C (14 F): Days with min2877198940
-20 C (-4 F): Days with min282119684
-30 C (-22 F): Days with min3319712
20 C (68 F): Tropical nights (min9519883
10 mm (0.39 in): Days with 10 mm or more rain6552197338
25 mm (0.98 in): Days with 25 mm or more rain6520197317
50 mm (1.97 in): Days with 50 mm or more rain46619691
100 mm (3.94 in): Days with 100 mm or more rain4119341
10 cm (3.9 in): Days with 10 cm or more snowfall211219561
25 cm (9.8 in): Days with 25 cm or more snowfall11219601

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1963.

Download the Data

  • Data for Ellsworth 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).