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Built 2026-10-19 (19 October 2026)

Arno Threshold Days by Year (ASN00036100)

4 fixed thresholds counted per year at Arno (ASN00036100): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Arno Thresholds

  • Arno: days with 10 mm (0.39 in) or more of precipitation in 28 years, most in 1976 with 18.
  • Arno: days with 25 mm (0.98 in) or more of precipitation in 26 years, most in 1971 with 9.
  • Arno: days with 50 mm (1.97 in) or more of precipitation in 18 years, most in 1971 with 5.
  • Arno: days with 100 mm (3.94 in) or more of precipitation in 3 years, most in 1971 with 1.
  • 4 fixed thresholds have at least one qualifying day at Arno.
28 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Arno Days per year at Arno with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 18 in 1976. 051015201959: 131960: 151961: 91962: 141963: 161966: 101967: 51968: 71969: 51970: 41971: 171972: 101973: 131974: 151975: 121976: 181977: 181978: 181979: 81980: 81981: 171982: 41983: 121984: 111985: 101986: 81987: 141988: 101959196219671970197319761979198219851988
Days per year at Arno with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 18 in 1976.
Days with 10 mm (0.39 in) or more of precipitation per year at Arno
YearDaysDecade average
19591313
19601510.1
1961910.1
19621410.1
19631610.1
19661010.1
1967510.1
1968710.1
1969510.1
1970413.3
19711713.3
19721013.3
19731313.3
19741513.3
19751213.3
19761813.3
19771813.3
19781813.3
1979813.3
1980810.4
19811710.4
1982410.4
19831210.4
19841110.4
19851010.4
1986810.4
19871410.4
19881010.4
First to last qualifying date each year at Arno For each year, a bar from the first to the last day at Arno meeting 10 mm (0.39 in). 1959: 25 January 1959 to 17 December 19591960: 8 January 1960 to 28 December 19601961: 1 January 1961 to 17 December 19611962: 6 January 1962 to 27 December 19621963: 13 January 1963 to 30 November 19631966: 5 January 1966 to 8 August 19661967: 3 March 1967 to 29 December 19671968: 16 January 1968 to 23 December 19681969: 18 January 1969 to 23 December 19691970: 22 February 1970 to 26 December 19701971: 18 January 1971 to 27 December 19711972: 12 January 1972 to 8 December 19721973: 14 January 1973 to 30 December 19731974: 6 January 1974 to 17 November 19741975: 2 January 1975 to 27 December 19751976: 10 January 1976 to 22 December 19761977: 14 January 1977 to 18 December 19771978: 12 January 1978 to 31 October 19781979: 5 February 1979 to 23 October 19791980: 5 January 1980 to 27 May 19801981: 16 January 1981 to 24 December 19811982: 2 January 1982 to 2 March 19821983: 18 March 1983 to 2 December 19831984: 2 January 1984 to 19 December 19841985: 4 February 1985 to 7 December 19851986: 4 February 1986 to 4 December 19861987: 2 January 1987 to 28 December 19871988: 19 February 1988 to 26 December 19881959196319691973197719811985JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Arno meeting 10 mm (0.39 in).
First to last qualifying date each year at Arno
YearFirst dateLast date
19591959-01-251959-12-17
19601960-01-081960-12-28
19611961-01-011961-12-17
19621962-01-061962-12-27
19631963-01-131963-11-30
19661966-01-051966-08-08
19671967-03-031967-12-29
19681968-01-161968-12-23
19691969-01-181969-12-23
19701970-02-221970-12-26
19711971-01-181971-12-27
19721972-01-121972-12-08
19731973-01-141973-12-30
19741974-01-061974-11-17
19751975-01-021975-12-27
19761976-01-101976-12-22
19771977-01-141977-12-18
19781978-01-121978-10-31
19791979-02-051979-10-23
19801980-01-051980-05-27
19811981-01-161981-12-24
19821982-01-021982-03-02
19831983-03-181983-12-02
19841984-01-021984-12-19
19851985-02-041985-12-07
19861986-02-041986-12-04
19871987-01-021987-12-28
19881988-02-191988-12-26

Every Fixed Threshold

Fixed thresholds at Arno
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2818197610
25 mm (0.98 in): Days with 25 mm or more rain26919715
50 mm (1.97 in): Days with 50 mm or more rain18519711
100 mm (3.94 in): Days with 100 mm or more rain3119711

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 Arno 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).