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

Ico Threshold Days by Year (BR038737080)

4 fixed thresholds counted per year at Ico (BR038737080): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ico Thresholds

  • Ico: days with 10 mm (0.39 in) or more of precipitation in 38 years, most in 1974 with 28.
  • Ico: days with 25 mm (0.98 in) or more of precipitation in 37 years, most in 1971 with 9.
  • Ico: days with 50 mm (1.97 in) or more of precipitation in 31 years, most in 1937 with 4.
  • Ico: days with 100 mm (3.94 in) or more of precipitation in 5 years, most in 1942 with 1.
  • 4 fixed thresholds have at least one qualifying day at Ico.
38 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Ico Days per year at Ico with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 28 in 1974. 01020301937: 131939: 41940: 161942: 101943: 61944: 51945: 121946: 51947: 161948: 81949: 111950: 101951: 31952: 131953: 41954: 171955: 61956: 61957: 161958: 71960: 171963: 131964: 171965: 121966: 181967: 141968: 81969: 91970: 71971: 181972: 141973: 141974: 281975: 121976: 71977: 171978: 141983: 111937194319471951195519601966197019741978
Days per year at Ico with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 28 in 1974.
Days with 10 mm (0.39 in) or more of precipitation per year at Ico
YearDaysDecade average
1937138.5
193948.5
1940169.9
1942109.9
194369.9
194459.9
1945129.9
194659.9
1947169.9
194889.9
1949119.9
1950109.1
195139.1
1952139.1
195349.1
1954179.1
195569.1
195669.1
1957169.1
195879.1
19601713.5
19631313.5
19641713.5
19651213.5
19661813.5
19671413.5
1968813.5
1969913.5
1970714.6
19711814.6
19721414.6
19731414.6
19742814.6
19751214.6
1976714.6
19771714.6
19781414.6
19831111
First to last qualifying date each year at Ico For each year, a bar from the first to the last day at Ico meeting 10 mm (0.39 in). 1937: 27 January 1937 to 19 December 19371939: 19 January 1939 to 9 December 19391940: 3 January 1940 to 31 December 19401942: 3 January 1942 to 27 December 19421943: 12 March 1943 to 24 December 19431944: 21 March 1944 to 23 November 19441945: 11 January 1945 to 20 December 19451946: 3 January 1946 to 17 December 19461947: 21 January 1947 to 4 December 19471948: 5 March 1948 to 13 December 19481949: 2 February 1949 to 29 November 19491950: 13 January 1950 to 16 November 19501951: 25 March 1951 to 18 December 19511952: 15 February 1952 to 17 December 19521953: 13 July 1953 to 21 December 19531954: 23 January 1954 to 7 December 19541955: 20 January 1955 to 10 November 19551956: 21 February 1956 to 31 December 19561957: 7 January 1957 to 9 May 19571958: 25 January 1958 to 28 December 19581960: 1 January 1960 to 22 June 19601963: 9 February 1963 to 27 December 19631964: 5 January 1964 to 6 December 19641965: 19 January 1965 to 29 December 19651966: 14 January 1966 to 19 December 19661967: 26 January 1967 to 29 December 19671968: 20 February 1968 to 13 April 19681969: 25 January 1969 to 20 July 19691970: 14 January 1970 to 26 November 19701971: 24 February 1971 to 23 December 19711972: 19 January 1972 to 21 December 19721973: 16 January 1973 to 17 October 19731974: 20 January 1974 to 5 December 19741975: 20 January 1975 to 17 July 19751976: 13 February 1976 to 30 November 19761977: 21 January 1977 to 26 December 19771978: 8 February 1978 to 6 December 19781983: 21 January 1983 to 5 December 198319371944194919541960196719721977JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Ico meeting 10 mm (0.39 in).
First to last qualifying date each year at Ico
YearFirst dateLast date
19371937-01-271937-12-19
19391939-01-191939-12-09
19401940-01-031940-12-31
19421942-01-031942-12-27
19431943-03-121943-12-24
19441944-03-211944-11-23
19451945-01-111945-12-20
19461946-01-031946-12-17
19471947-01-211947-12-04
19481948-03-051948-12-13
19491949-02-021949-11-29
19501950-01-131950-11-16
19511951-03-251951-12-18
19521952-02-151952-12-17
19531953-07-131953-12-21
19541954-01-231954-12-07
19551955-01-201955-11-10
19561956-02-211956-12-31
19571957-01-071957-05-09
19581958-01-251958-12-28
19601960-01-011960-06-22
19631963-02-091963-12-27
19641964-01-051964-12-06
19651965-01-191965-12-29
19661966-01-141966-12-19
19671967-01-261967-12-29
19681968-02-201968-04-13
19691969-01-251969-07-20
19701970-01-141970-11-26
19711971-02-241971-12-23
19721972-01-191972-12-21
19731973-01-161973-10-17
19741974-01-201974-12-05
19751975-01-201975-07-17
19761976-02-131976-11-30
19771977-01-211977-12-26
19781978-02-081978-12-06
19831983-01-211983-12-05

Every Fixed Threshold

Fixed thresholds at Ico
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3828197411
25 mm (0.98 in): Days with 25 mm or more rain37919716
50 mm (1.97 in): Days with 50 mm or more rain31419371
100 mm (3.94 in): Days with 100 mm or more rain5119421

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1937.

Download the Data

  • Data for Ico 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).