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

Chornobyl Threshold Days by Year (UPM00033231)

11 fixed thresholds counted per year at Chornobyl (UPM00033231): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chornobyl Thresholds

  • Chornobyl: days with 10 mm (0.39 in) or more of precipitation in 18 years, most in 1966 with 20.
  • Chornobyl: days with 25 mm (0.98 in) or more of precipitation in 17 years, most in 1964 with 4.
  • Chornobyl: days with a maximum temperature at or above 30 C (86 F) in 2 years, most in 2015 with 28.
  • Chornobyl: days with a maximum temperature at or above 90 F (32.2 C) in 2 years, most in 2015 with 13.
  • 11 fixed thresholds have at least one qualifying day at Chornobyl.
18 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Chornobyl Days per year at Chornobyl with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 20 in 1966. 01020301960: 91961: 61962: 141963: 51964: 141965: 161966: 201977: 171978: 151979: 151980: 281981: 191982: 141983: 101984: 151985: 211989: 131990: 14196019621964196619781980198219841989
Days per year at Chornobyl with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 20 in 1966.
Days with 10 mm (0.39 in) or more of precipitation per year at Chornobyl
YearDaysDecade average
1960912
1961612
19621412
1963512
19641412
19651612
19662012
19771715.7
19781515.7
19791515.7
19802817.1
19811917.1
19821417.1
19831017.1
19841517.1
19852117.1
19891317.1
19901414
First to last qualifying date each year at Chornobyl For each year, a bar from the first to the last day at Chornobyl meeting 10 mm (0.39 in). 1960: 20 May 1960 to 17 November 19601961: 9 April 1961 to 14 November 19611962: 14 February 1962 to 22 November 19621963: 13 March 1963 to 6 November 19631964: 18 March 1964 to 27 December 19641965: 5 January 1965 to 23 December 19651966: 7 January 1966 to 12 December 19661977: 18 February 1977 to 17 November 19771978: 15 February 1978 to 30 December 19781979: 1 January 1979 to 13 November 19791980: 1 January 1980 to 3 December 19801981: 14 February 1981 to 26 December 19811982: 20 April 1982 to 18 November 19821983: 13 February 1983 to 29 November 19831984: 21 January 1984 to 24 September 19841985: 7 January 1985 to 26 November 19851989: 27 February 1989 to 3 September 19891990: 8 April 1990 to 13 December 1990196019631966197919821985JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Chornobyl meeting 10 mm (0.39 in).
First to last qualifying date each year at Chornobyl
YearFirst dateLast date
19601960-05-201960-11-17
19611961-04-091961-11-14
19621962-02-141962-11-22
19631963-03-131963-11-06
19641964-03-181964-12-27
19651965-01-051965-12-23
19661966-01-071966-12-12
19771977-02-181977-11-17
19781978-02-151978-12-30
19791979-01-011979-11-13
19801980-01-011980-12-03
19811981-02-141981-12-26
19821982-04-201982-11-18
19831983-02-131983-11-29
19841984-01-211984-09-24
19851985-01-071985-11-26
19891989-02-271989-09-03
19901990-04-081990-12-13

Every Fixed Threshold

Fixed thresholds at Chornobyl
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days228201528
35 C (95 F): Days1320153
90 F (32.2 C): Days213201513
0 C (32 F): Ice days (max240200317
0 C (32 F): Frost days (min21272003127
-10 C (14 F): Days with min225200325
-20 C (-4 F): Days with min2220032
20 C (68 F): Tropical nights (min10n/a8
10 mm (0.39 in): Days with 10 mm or more rain1820196614
25 mm (0.98 in): Days with 25 mm or more rain17419644
50 mm (1.97 in): Days with 50 mm or more rain2119651

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2003.

Download the Data

  • Data for Chornobyl 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).