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

Rosta Threshold Days by Year (SWE00140002)

11 fixed thresholds counted per year at Rosta (SWE00140002): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rosta Thresholds

  • Rosta: days with a maximum temperature at or below 0 C (32 F) in 71 years, most in 1941 with 132.
  • Rosta: nights with a minimum temperature at or below 0 C (32 F) in 71 years, most in 1952 with 223.
  • Rosta: nights with a minimum temperature at or below -10 C (14 F) in 71 years, most in 1958 with 96.
  • Rosta: nights with a minimum temperature at or below -20 C (-4 F) in 70 years, most in 1985 with 41.
  • 11 fixed thresholds have at least one qualifying day at Rosta.
8 years with a qualifying day
Days at or above 30 C (86 F) per year at Rosta Days per year at Rosta with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 4 in 1941. 012341941: 41944: 21945: 31947: 41953: 11955: 32003: 32008: 119411944194519471953195520032008
Days per year at Rosta with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 4 in 1941.
Days at or above 30 C (86 F) per year at Rosta
YearDaysDecade average
194143.3
194423.3
194533.3
194743.3
195312
195532
200332
200812
First to last qualifying date each year at Rosta For each year, a bar from the first to the last day at Rosta meeting 30 C (86 F). 1941: 26 June 1941 to 13 July 19411944: 9 July 1944 to 10 July 19441945: 12 July 1945 to 17 July 19451947: 29 June 1947 to 16 August 19471953: 26 June 1953 to 26 June 19531955: 11 July 1955 to 14 July 19552003: 16 July 2003 to 18 July 20032008: 27 July 2008 to 27 July 200819411944194519471953195520032008JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Rosta meeting 30 C (86 F).
First to last qualifying date each year at Rosta
YearFirst dateLast date
19411941-06-261941-07-13
19441944-07-091944-07-10
19451945-07-121945-07-17
19471947-06-291947-08-16
19531953-06-261953-06-26
19551955-07-111955-07-14
20032003-07-162003-07-18
20082008-07-272008-07-27

Every Fixed Threshold

Fixed thresholds at Rosta
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days8419411
90 F (32.2 C): Days1219472
0 C (32 F): Ice days (max71132194170
0 C (32 F): Frost days (min712231952156
-10 C (14 F): Days with min7196195836
-20 C (-4 F): Days with min704119853
-30 C (-22 F): Days with min23819662
20 C (68 F): Tropical nights (min1119681
10 mm (0.39 in): Days with 10 mm or more rain6724196012
25 mm (0.98 in): Days with 25 mm or more rain45520101
50 mm (1.97 in): Days with 50 mm or more rain2120011

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1941.

Download the Data

  • Data for Rosta 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).