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Built 2026-10-19 (19 October 2026)

St Helens Post Office Threshold Days by Year (ASN00092033)

10 fixed thresholds counted per year at St Helens Post Office (ASN00092033): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for St Helens Post Office Thresholds

  • St Helens Post Office: days with 10 mm (0.39 in) or more of precipitation in 93 years, most in 1934 with 33.
  • St Helens Post Office: days with 25 mm (0.98 in) or more of precipitation in 93 years, most in 1984 with 11.
  • St Helens Post Office: days with 50 mm (1.97 in) or more of precipitation in 70 years, most in 1934 with 4.
  • St Helens Post Office: nights with a minimum temperature at or below 0 C (32 F) in 34 years, most in 1968 with 40.
  • 10 fixed thresholds have at least one qualifying day at St Helens Post Office.
31 years with a qualifying day
Days at or above 30 C (86 F) per year at St Helens Post Office Days per year at St Helens Post Office with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 12 in 1991. 0510151957: 51958: 41959: 81960: 81961: 61962: 41963: 41964: 11965: 41966: 81967: 51968: 101969: 71970: 41971: 51974: 31979: 51980: 61981: 51982: 111983: 61984: 21985: 31986: 31990: 51991: 121992: 41993: 101994: 91995: 21996: 119571961196519691979198319901994
Days per year at St Helens Post Office with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 12 in 1991.
Days at or above 30 C (86 F) per year at St Helens Post Office
YearDaysDecade average
195755.7
195845.7
195985.7
196085.7
196165.7
196245.7
196345.7
196415.7
196545.7
196685.7
196755.7
1968105.7
196975.7
197044.3
197154.3
197434.3
197954.3
198065.1
198155.1
1982115.1
198365.1
198425.1
198535.1
198635.1
199056.1
1991126.1
199246.1
1993106.1
199496.1
199526.1
199616.1
First to last qualifying date each year at St Helens Post Office For each year, a bar from the first to the last day at St Helens Post Office meeting 30 C (86 F). 1957: 12 January 1957 to 23 December 19571958: 24 February 1958 to 28 November 19581959: 17 January 1959 to 22 November 19591960: 11 January 1960 to 30 December 19601961: 9 January 1961 to 28 December 19611962: 16 January 1962 to 1 December 19621963: 1 January 1963 to 28 December 19631964: 6 January 1964 to 6 January 19641965: 16 January 1965 to 23 December 19651966: 10 January 1966 to 11 December 19661967: 28 January 1967 to 16 March 19671968: 16 January 1968 to 15 October 19681969: 7 January 1969 to 28 December 19691970: 4 February 1970 to 4 December 19701971: 9 February 1971 to 30 March 19711974: 29 January 1974 to 3 March 19741979: 24 January 1979 to 29 December 19791980: 1 February 1980 to 11 December 19801981: 1 January 1981 to 19 March 19811982: 11 January 1982 to 23 December 19821983: 31 January 1983 to 20 December 19831984: 16 February 1984 to 27 February 19841985: 14 January 1985 to 4 February 19851986: 8 February 1986 to 5 November 19861990: 11 January 1990 to 5 December 19901991: 3 January 1991 to 27 December 19911992: 20 January 1992 to 11 March 19921993: 14 January 1993 to 11 December 19931994: 13 January 1994 to 28 December 19941995: 4 January 1995 to 25 February 19951996: 15 January 1996 to 15 January 199619571961196519691979198319901994JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at St Helens Post Office meeting 30 C (86 F).
First to last qualifying date each year at St Helens Post Office
YearFirst dateLast date
19571957-01-121957-12-23
19581958-02-241958-11-28
19591959-01-171959-11-22
19601960-01-111960-12-30
19611961-01-091961-12-28
19621962-01-161962-12-01
19631963-01-011963-12-28
19641964-01-061964-01-06
19651965-01-161965-12-23
19661966-01-101966-12-11
19671967-01-281967-03-16
19681968-01-161968-10-15
19691969-01-071969-12-28
19701970-02-041970-12-04
19711971-02-091971-03-30
19741974-01-291974-03-03
19791979-01-241979-12-29
19801980-02-011980-12-11
19811981-01-011981-03-19
19821982-01-111982-12-23
19831983-01-311983-12-20
19841984-02-161984-02-27
19851985-01-141985-02-04
19861986-02-081986-11-05
19901990-01-111990-12-05
19911991-01-031991-12-27
19921992-01-201992-03-11
19931993-01-141993-12-11
19941994-01-131994-12-28
19951995-01-041995-02-25
19961996-01-151996-01-15

Every Fixed Threshold

Fixed thresholds at St Helens Post Office
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days311219911
35 C (95 F): Days15419591
90 F (32.2 C): Days26619591
100 F (37.8 C): Days6119591
0 C (32 F): Frost days (min3440196816
20 C (68 F): Tropical nights (min2219822
10 mm (0.39 in): Days with 10 mm or more rain9333193415
25 mm (0.98 in): Days with 25 mm or more rain931119842
50 mm (1.97 in): Days with 50 mm or more rain70419341
100 mm (3.94 in): Days with 100 mm or more rain18219111

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1957.

Download the Data

  • Data for St Helens Post Office 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).