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Data as of 2025-12-31
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Built 2026-10-18 (18 October 2026)

Koomela Threshold Days by Year

3 fixed thresholds counted per year at Koomela (ASN00098006): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Koomela Thresholds

  • Koomela: days with 10 mm (0.39 in) or more of precipitation in 19 years, most in 1975 with 50.
  • Koomela: days with 25 mm (0.98 in) or more of precipitation in 19 years, most in 1960 with 8.
  • Koomela: days with 50 mm (1.97 in) or more of precipitation in 5 years, most in 1955 with 2.
  • 3 fixed thresholds have at least one qualifying day at Koomela.
19 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Koomela Days per year at Koomela with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 50 in 1975. 02040601954: 271955: 341959: 201960: 401961: 191962: 331963: 241964: 391967: 221968: 361969: 251970: 351971: 481972: 281973: 401974: 341975: 501982: 171984: 341954195919611963196719691971197319751984
Days per year at Koomela with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 50 in 1975.
Days with 10 mm (0.39 in) or more of precipitation per year at Koomela
YearDaysDecade average
19542727
19553427
19592027
19604029.8
19611929.8
19623329.8
19632429.8
19643929.8
19672229.8
19683629.8
19692529.8
19703539.2
19714839.2
19722839.2
19734039.2
19743439.2
19755039.2
19821725.5
19843425.5
First to last qualifying date each year at Koomela For each year, a bar from the first to the last day at Koomela meeting 10 mm (0.39 in). 1954: 28 January 1954 to 12 December 19541955: 12 February 1955 to 31 December 19551959: 7 February 1959 to 30 December 19591960: 8 January 1960 to 4 December 19601961: 11 January 1961 to 25 October 19611962: 29 January 1962 to 11 December 19621963: 14 January 1963 to 30 October 19631964: 7 February 1964 to 22 December 19641967: 13 January 1967 to 30 December 19671968: 25 March 1968 to 19 November 19681969: 15 January 1969 to 18 November 19691970: 3 January 1970 to 5 December 19701971: 1 January 1971 to 31 December 19711972: 12 January 1972 to 10 November 19721973: 13 January 1973 to 22 December 19731974: 2 February 1974 to 28 December 19741975: 11 January 1975 to 26 November 19751982: 22 March 1982 to 8 December 19821984: 7 February 1984 to 15 December 19841954196019631968197119741984JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Koomela meeting 10 mm (0.39 in).
First to last qualifying date each year at Koomela
YearFirst dateLast date
19541954-01-281954-12-12
19551955-02-121955-12-31
19591959-02-071959-12-30
19601960-01-081960-12-04
19611961-01-111961-10-25
19621962-01-291962-12-11
19631963-01-141963-10-30
19641964-02-071964-12-22
19671967-01-131967-12-30
19681968-03-251968-11-19
19691969-01-151969-11-18
19701970-01-031970-12-05
19711971-01-011971-12-31
19721972-01-121972-11-10
19731973-01-131973-12-22
19741974-02-021974-12-28
19751975-01-111975-11-26
19821982-03-221982-12-08
19841984-02-071984-12-15

Every Fixed Threshold

Fixed thresholds at Koomela
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1950197534
25 mm (0.98 in): Days with 25 mm or more rain19819605
50 mm (1.97 in): Days with 50 mm or more rain5219551

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1954.

Download the Data

  • Data for Koomela 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).