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Built 2026-10-19 (19 October 2026)

Hells Gate Threshold Days by Year (CA001113420)

16 fixed thresholds counted per year at Hells Gate (CA001113420): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hells Gate Thresholds

  • Hells Gate: days with 10 cm (3.9 in) or more of snowfall in 31 years, most in 1970 with 13.
  • Hells Gate: days with 10 mm (0.39 in) or more of precipitation in 30 years, most in 1971 with 51.
  • Hells Gate: days with 25 mm (0.98 in) or more of precipitation in 30 years, most in 1954 with 23.
  • Hells Gate: days with a maximum temperature at or above 30 C (86 F) in 27 years, most in 1958 with 59.
  • 16 fixed thresholds have at least one qualifying day at Hells Gate.
27 years with a qualifying day
Days at or above 30 C (86 F) per year at Hells Gate Days per year at Hells Gate with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 59 in 1958. 02040601952: 281953: 191954: 81955: 191956: 171958: 591959: 181961: 521962: 121963: 211964: 101965: 251966: 141967: 401968: 211969: 241970: 291971: 311975: 171976: 61977: 321978: 311979: 281980: 141981: 251982: 291983: 15195219551959196319661969197519781981
Days per year at Hells Gate with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 59 in 1958.
Days at or above 30 C (86 F) per year at Hells Gate
YearDaysDecade average
19522824
19531924
1954824
19551924
19561724
19585924
19591824
19615224.3
19621224.3
19632124.3
19641024.3
19652524.3
19661424.3
19674024.3
19682124.3
19692424.3
19702924.9
19713124.9
19751724.9
1976624.9
19773224.9
19783124.9
19792824.9
19801420.8
19812520.8
19822920.8
19831520.8
First to last qualifying date each year at Hells Gate For each year, a bar from the first to the last day at Hells Gate meeting 30 C (86 F). 1952: 23 May 1952 to 4 September 19521953: 5 July 1953 to 11 September 19531954: 30 June 1954 to 13 August 19541955: 8 June 1955 to 6 September 19551956: 8 July 1956 to 22 August 19561958: 18 May 1958 to 7 September 19581959: 13 May 1959 to 1 August 19591961: 19 May 1961 to 28 August 19611962: 8 July 1962 to 15 August 19621963: 19 May 1963 to 9 September 19631964: 1 July 1964 to 23 August 19641965: 8 June 1965 to 18 August 19651966: 15 June 1966 to 24 August 19661967: 5 June 1967 to 31 August 19671968: 24 June 1968 to 10 August 19681969: 21 May 1969 to 10 September 19691970: 1 June 1970 to 23 August 19701971: 14 July 1971 to 29 August 19711975: 19 June 1975 to 14 August 19751976: 15 July 1976 to 6 August 19761977: 6 June 1977 to 20 August 19771978: 1 June 1978 to 9 August 19781979: 22 May 1979 to 26 August 19791980: 7 July 1980 to 12 August 19801981: 3 July 1981 to 17 September 19811982: 11 June 1982 to 2 September 19821983: 24 May 1983 to 22 August 19831952195619621966197019771981JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Hells Gate meeting 30 C (86 F).
First to last qualifying date each year at Hells Gate
YearFirst dateLast date
19521952-05-231952-09-04
19531953-07-051953-09-11
19541954-06-301954-08-13
19551955-06-081955-09-06
19561956-07-081956-08-22
19581958-05-181958-09-07
19591959-05-131959-08-01
19611961-05-191961-08-28
19621962-07-081962-08-15
19631963-05-191963-09-09
19641964-07-011964-08-23
19651965-06-081965-08-18
19661966-06-151966-08-24
19671967-06-051967-08-31
19681968-06-241968-08-10
19691969-05-211969-09-10
19701970-06-011970-08-23
19711971-07-141971-08-29
19751975-06-191975-08-14
19761976-07-151976-08-06
19771977-06-061977-08-20
19781978-06-011978-08-09
19791979-05-221979-08-26
19801980-07-071980-08-12
19811981-07-031981-09-17
19821982-06-111982-09-02
19831983-05-241983-08-22

Every Fixed Threshold

Fixed thresholds at Hells Gate
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2759195815
35 C (95 F): Days212219581
40 C (104 F): Days3219712
90 F (32.2 C): Days274119585
100 F (37.8 C): Days13819712
0 C (32 F): Ice days (max2756195627
0 C (32 F): Frost days (min27131195560
-10 C (14 F): Days with min2727195512
-20 C (-4 F): Days with min8719691
20 C (68 F): Tropical nights (min91219581
10 mm (0.39 in): Days with 10 mm or more rain3051197140
25 mm (0.98 in): Days with 25 mm or more rain302319547
50 mm (1.97 in): Days with 50 mm or more rain19519633
10 cm (3.9 in): Days with 10 cm or more snowfall311319701
25 cm (9.8 in): Days with 25 cm or more snowfall21519751
50 cm (19.7 in): Days with 50 cm or more snowfall5119531

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1952.

Download the Data

  • Data for Hells Gate 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).