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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Hallviken Threshold Days by Year (SWE00140148)

9 fixed thresholds counted per year at Hallviken (SWE00140148): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hallviken Thresholds

  • Hallviken: days with 10 mm (0.39 in) or more of precipitation in 29 years, most in 1950 with 19.
  • Hallviken: days with a maximum temperature at or below 0 C (32 F) in 24 years, most in 1955 with 135.
  • Hallviken: nights with a minimum temperature at or below 0 C (32 F) in 24 years, most in 1955 with 233.
  • Hallviken: nights with a minimum temperature at or below -10 C (14 F) in 24 years, most in 1956 with 110.
  • 9 fixed thresholds have at least one qualifying day at Hallviken.
24 years with a qualifying day
Nights at or below 0 C (32 F) per year at Hallviken Days per year at Hallviken with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 233 in 1955. 01002003001954: 2261955: 2331956: 2191957: 2181958: 2251959: 1971960: 2291961: 1711962: 2031963: 1961964: 1951965: 2011966: 2121967: 1961968: 2201969: 2051970: 2041971: 2171972: 2081973: 2131974: 2061975: 1991976: 2271977: 21719541957196019631966196919721975
Days per year at Hallviken with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 233 in 1955.
Nights at or below 0 C (32 F) per year at Hallviken
YearDaysDecade average
1954226219.7
1955233219.7
1956219219.7
1957218219.7
1958225219.7
1959197219.7
1960229202.8
1961171202.8
1962203202.8
1963196202.8
1964195202.8
1965201202.8
1966212202.8
1967196202.8
1968220202.8
1969205202.8
1970204211.4
1971217211.4
1972208211.4
1973213211.4
1974206211.4
1975199211.4
1976227211.4
1977217211.4
First to last qualifying date each year at Hallviken For each year, a bar from the first to the last day at Hallviken meeting 0 C (32 F). 1954: 1 January 1954 to 31 December 19541955: 1 January 1955 to 31 December 19551956: 1 January 1956 to 31 December 19561957: 1 January 1957 to 31 December 19571958: 1 January 1958 to 31 December 19581959: 1 January 1959 to 31 December 19591960: 1 January 1960 to 31 December 19601961: 1 January 1961 to 31 December 19611962: 1 January 1962 to 31 December 19621963: 1 January 1963 to 31 December 19631964: 1 January 1964 to 31 December 19641965: 1 January 1965 to 31 December 19651966: 1 January 1966 to 31 December 19661967: 1 January 1967 to 31 December 19671968: 1 January 1968 to 31 December 19681969: 1 January 1969 to 31 December 19691970: 1 January 1970 to 31 December 19701971: 1 January 1971 to 31 December 19711972: 1 January 1972 to 30 December 19721973: 1 January 1973 to 31 December 19731974: 1 January 1974 to 31 December 19741975: 1 January 1975 to 31 December 19751976: 1 January 1976 to 31 December 19761977: 1 January 1977 to 31 December 197719541957196019631966196919721975JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Hallviken meeting 0 C (32 F).
First to last qualifying date each year at Hallviken
YearFirst dateLast date
19541954-01-011954-12-31
19551955-01-011955-12-31
19561956-01-011956-12-31
19571957-01-011957-12-31
19581958-01-011958-12-31
19591959-01-011959-12-31
19601960-01-011960-12-31
19611961-01-011961-12-31
19621962-01-011962-12-31
19631963-01-011963-12-31
19641964-01-011964-12-31
19651965-01-011965-12-31
19661966-01-011966-12-31
19671967-01-011967-12-31
19681968-01-011968-12-31
19691969-01-011969-12-31
19701970-01-011970-12-31
19711971-01-011971-12-31
19721972-01-011972-12-30
19731973-01-011973-12-31
19741974-01-011974-12-31
19751975-01-011975-12-31
19761976-01-011976-12-31
19771977-01-011977-12-31

Every Fixed Threshold

Fixed thresholds at Hallviken
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1119681
0 C (32 F): Ice days (max241351955120
0 C (32 F): Frost days (min242331955217
-10 C (14 F): Days with min24110195676
-20 C (-4 F): Days with min2440195818
-30 C (-22 F): Days with min161019664
20 C (68 F): Tropical nights (min1119681
10 mm (0.39 in): Days with 10 mm or more rain291919509
25 mm (0.98 in): Days with 25 mm or more rain11319641

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1968.

Download the Data

  • Data for Hallviken 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).