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

Riksten Threshold Days by Year (SWE00138758)

10 fixed thresholds counted per year at Riksten (SWE00138758): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Riksten Thresholds

  • Riksten: days with 10 mm (0.39 in) or more of precipitation in 36 years, most in 1949 with 26.
  • Riksten: nights with a minimum temperature at or below 0 C (32 F) in 34 years, most in 1952 with 192.
  • Riksten: nights with a minimum temperature at or below -10 C (14 F) in 34 years, most in 1963 with 72.
  • Riksten: days with 25 mm (0.98 in) or more of precipitation in 30 years, most in 1977 with 4.
  • 10 fixed thresholds have at least one qualifying day at Riksten.
7 years with a qualifying day
Days at or above 30 C (86 F) per year at Riksten Days per year at Riksten with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 5 in 1975. 02461959: 21968: 11970: 21973: 21975: 51982: 41983: 41959196819701973197519821983
Days per year at Riksten with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 5 in 1975.
Days at or above 30 C (86 F) per year at Riksten
YearDaysDecade average
195922
196811
197023
197323
197553
198244
198344
First to last qualifying date each year at Riksten For each year, a bar from the first to the last day at Riksten meeting 30 C (86 F). 1959: 20 August 1959 to 21 August 19591968: 18 June 1968 to 18 June 19681970: 19 June 1970 to 20 June 19701973: 24 June 1973 to 7 July 19731975: 4 August 1975 to 9 August 19751982: 5 June 1982 to 8 August 19821983: 9 July 1983 to 9 August 19831959196819701973197519821983JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Riksten meeting 30 C (86 F).
First to last qualifying date each year at Riksten
YearFirst dateLast date
19591959-08-201959-08-21
19681968-06-181968-06-18
19701970-06-191970-06-20
19731973-06-241973-07-07
19751975-08-041975-08-09
19821982-06-051982-08-08
19831983-07-091983-08-09

Every Fixed Threshold

Fixed thresholds at Riksten
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days7519754
90 F (32.2 C): Days2319751
0 C (32 F): Ice days (max2987196339
0 C (32 F): Frost days (min341921952135
-10 C (14 F): Days with min3472196323
-20 C (-4 F): Days with min281719661
-30 C (-22 F): Days with min3219662
10 mm (0.39 in): Days with 10 mm or more rain3626194915
25 mm (0.98 in): Days with 25 mm or more rain30419771
50 mm (1.97 in): Days with 50 mm or more rain2119541

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1959.

Download the Data

  • Data for Riksten 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).