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

Ruzyne Threshold Days by Year (EZM00011518)

9 fixed thresholds counted per year at Ruzyne (EZM00011518): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ruzyne Thresholds

  • Ruzyne: days with 10 mm (0.39 in) or more of precipitation in 31 years, most in 1980 with 17.
  • Ruzyne: days with 25 mm (0.98 in) or more of precipitation in 25 years, most in 1978 with 3.
  • Ruzyne: days with a maximum temperature at or above 30 C (86 F) in 13 years, most in 1963 with 11.
  • Ruzyne: days with a maximum temperature at or below 0 C (32 F) in 13 years, most in 1963 with 73.
  • 9 fixed thresholds have at least one qualifying day at Ruzyne.
13 years with a qualifying day
Days at or above 30 C (86 F) per year at Ruzyne Days per year at Ruzyne with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 11 in 1963. 0510151959: 51960: 41961: 61962: 91963: 111973: 101974: 41976: 101978: 11979: 61980: 21981: 32001: 31959196119631974197819802001
Days per year at Ruzyne with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 11 in 1963.
Days at or above 30 C (86 F) per year at Ruzyne
YearDaysDecade average
195955
196047.5
196167.5
196297.5
1963117.5
1973106.2
197446.2
1976106.2
197816.2
197966.2
198022.5
198132.5
200133
First to last qualifying date each year at Ruzyne For each year, a bar from the first to the last day at Ruzyne meeting 30 C (86 F). 1959: 9 July 1959 to 28 July 19591960: 25 August 1960 to 28 August 19601961: 25 June 1961 to 3 September 19611962: 15 June 1962 to 12 September 19621963: 28 June 1963 to 7 August 19631973: 27 June 1973 to 9 September 19731974: 4 August 1974 to 17 August 19741976: 28 June 1976 to 19 July 19761978: 29 July 1978 to 29 July 19781979: 1 June 1979 to 16 August 19791980: 14 June 1980 to 3 August 19801981: 2 June 1981 to 1 August 19812001: 15 August 2001 to 26 August 20011959196119631974197819802001JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Ruzyne meeting 30 C (86 F).
First to last qualifying date each year at Ruzyne
YearFirst dateLast date
19591959-07-091959-07-28
19601960-08-251960-08-28
19611961-06-251961-09-03
19621962-06-151962-09-12
19631963-06-281963-08-07
19731973-06-271973-09-09
19741974-08-041974-08-17
19761976-06-281976-07-19
19781978-07-291978-07-29
19791979-06-011979-08-16
19801980-06-141980-08-03
19811981-06-021981-08-01
20012001-08-152001-08-26

Every Fixed Threshold

Fixed thresholds at Ruzyne
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days131119633
35 C (95 F): Days2219741
90 F (32.2 C): Days8419593
0 C (32 F): Ice days (max1373196327
0 C (32 F): Frost days (min10n/a33
-10 C (14 F): Days with min10n/a4
10 mm (0.39 in): Days with 10 mm or more rain3117198017
25 mm (0.98 in): Days with 25 mm or more rain25319788
50 mm (1.97 in): Days with 50 mm or more rain11319784

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 Ruzyne 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).