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

Arusha Threshold Days by Year (TZ000063789)

4 fixed thresholds counted per year at Arusha (TZ000063789): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Arusha Thresholds

  • Arusha: days with 10 mm (0.39 in) or more of precipitation in 31 years, most in 1978 with 50.
  • Arusha: days with 25 mm (0.98 in) or more of precipitation in 31 years, most in 1978 with 22.
  • Arusha: days with 50 mm (1.97 in) or more of precipitation in 21 years, most in 1963 with 5.
  • Arusha: days with 100 mm (3.94 in) or more of precipitation in 6 years, most in 1960 with 1.
  • 4 fixed thresholds have at least one qualifying day at Arusha.
31 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Arusha Days per year at Arusha with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 50 in 1978. 02040601959: 241960: 251961: 311962: 241963: 451964: 221965: 181966: 231967: 261968: 411969: 201970: 251971: 261972: 321973: 191974: 131975: 121976: 201977: 311978: 501979: 411980: 211981: 151982: 301983: 211984: 201985: 271986: 331987: 231988: 191989: 3019591963196719711975197919831987
Days per year at Arusha with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 50 in 1978.
Days with 10 mm (0.39 in) or more of precipitation per year at Arusha
YearDaysDecade average
19592424
19602527.5
19613127.5
19622427.5
19634527.5
19642227.5
19651827.5
19662327.5
19672627.5
19684127.5
19692027.5
19702526.9
19712626.9
19723226.9
19731926.9
19741326.9
19751226.9
19762026.9
19773126.9
19785026.9
19794126.9
19802123.9
19811523.9
19823023.9
19832123.9
19842023.9
19852723.9
19863323.9
19872323.9
19881923.9
19893023.9
First to last qualifying date each year at Arusha For each year, a bar from the first to the last day at Arusha meeting 10 mm (0.39 in). 1959: 14 February 1959 to 26 December 19591960: 12 January 1960 to 31 May 19601961: 12 January 1961 to 28 December 19611962: 11 January 1962 to 31 December 19621963: 21 January 1963 to 30 December 19631964: 22 February 1964 to 30 December 19641965: 1 January 1965 to 18 December 19651966: 21 January 1966 to 5 December 19661967: 7 February 1967 to 22 December 19671968: 9 February 1968 to 5 December 19681969: 23 January 1969 to 18 December 19691970: 2 January 1970 to 28 December 19701971: 16 January 1971 to 27 December 19711972: 4 January 1972 to 8 December 19721973: 3 January 1973 to 22 December 19731974: 5 February 1974 to 6 December 19741975: 9 January 1975 to 5 December 19751976: 1 January 1976 to 31 December 19761977: 2 January 1977 to 24 December 19771978: 15 January 1978 to 28 December 19781979: 9 January 1979 to 30 December 19791980: 25 January 1980 to 24 December 19801981: 18 February 1981 to 15 December 19811982: 15 February 1982 to 14 December 19821983: 12 February 1983 to 28 December 19831984: 24 January 1984 to 13 December 19841985: 7 January 1985 to 27 December 19851986: 9 January 1986 to 30 December 19861987: 14 January 1987 to 17 December 19871988: 9 January 1988 to 26 December 19881989: 5 January 1989 to 31 December 198919591963196719711975197919831987JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Arusha meeting 10 mm (0.39 in).
First to last qualifying date each year at Arusha
YearFirst dateLast date
19591959-02-141959-12-26
19601960-01-121960-05-31
19611961-01-121961-12-28
19621962-01-111962-12-31
19631963-01-211963-12-30
19641964-02-221964-12-30
19651965-01-011965-12-18
19661966-01-211966-12-05
19671967-02-071967-12-22
19681968-02-091968-12-05
19691969-01-231969-12-18
19701970-01-021970-12-28
19711971-01-161971-12-27
19721972-01-041972-12-08
19731973-01-031973-12-22
19741974-02-051974-12-06
19751975-01-091975-12-05
19761976-01-011976-12-31
19771977-01-021977-12-24
19781978-01-151978-12-28
19791979-01-091979-12-30
19801980-01-251980-12-24
19811981-02-181981-12-15
19821982-02-151982-12-14
19831983-02-121983-12-28
19841984-01-241984-12-13
19851985-01-071985-12-27
19861986-01-091986-12-30
19871987-01-141987-12-17
19881988-01-091988-12-26
19891989-01-051989-12-31

Every Fixed Threshold

Fixed thresholds at Arusha
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3150197830
25 mm (0.98 in): Days with 25 mm or more rain3122197811
50 mm (1.97 in): Days with 50 mm or more rain21519631
100 mm (3.94 in): Days with 100 mm or more rain6119601

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 Arusha 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).