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Data as of 2026-10-17
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Built 2026-10-19 (19 October 2026)

Ristna Threshold Days by Year (EN000026115)

10 fixed thresholds counted per year at Ristna (EN000026115): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ristna Thresholds

  • Ristna: days with a maximum temperature at or below 0 C (32 F) in 20 years, most in 2010 with 89.
  • Ristna: nights with a minimum temperature at or below 0 C (32 F) in 20 years, most in 2010 with 141.
  • Ristna: nights with a minimum temperature at or below -10 C (14 F) in 15 years, most in 2010 with 36.
  • Ristna: nights with a minimum temperature at or above 20 C (68 F) in 8 years, most in 2022 with 8.
  • 10 fixed thresholds have at least one qualifying day at Ristna.
6 years with a qualifying day
Days at or above 30 C (86 F) per year at Ristna Days per year at Ristna with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 6 in 2014. 02462010: 12014: 62018: 22019: 12021: 22022: 2201020142018201920212022
Days per year at Ristna with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 6 in 2014.
Days at or above 30 C (86 F) per year at Ristna
YearDaysDecade average
201012.5
201462.5
201822.5
201912.5
202122
202222
First to last qualifying date each year at Ristna For each year, a bar from the first to the last day at Ristna meeting 30 C (86 F). 2010: 13 July 2010 to 13 July 20102014: 27 July 2014 to 6 August 20142018: 30 July 2018 to 31 July 20182019: 28 July 2019 to 28 July 20192021: 27 July 2021 to 28 July 20212022: 28 June 2022 to 29 June 2022201020142018201920212022JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Ristna meeting 30 C (86 F).
First to last qualifying date each year at Ristna
YearFirst dateLast date
20102010-07-132010-07-13
20142014-07-272014-08-06
20182018-07-302018-07-31
20192019-07-282019-07-28
20212021-07-272021-07-28
20222022-06-282022-06-29

Every Fixed Threshold

Fixed thresholds at Ristna
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days6620142
0 C (32 F): Ice days (max2089201023
0 C (32 F): Frost days (min20141201036
-10 C (14 F): Days with min153620106
-20 C (-4 F): Days with min2320123
20 C (68 F): Tropical nights (min8820228
10 mm (0.39 in): Days with 10 mm or more rain330n/a37
25 mm (0.98 in): Days with 25 mm or more rain150n/a24
50 mm (1.97 in): Days with 50 mm or more rain50n/a14
100 mm (3.94 in): Days with 100 mm or more rain20n/a5

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2010.

Download the Data

  • Data for Ristna 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).