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Built 2026-10-19 (19 October 2026)

Federal Post Office Threshold Days by Year (ASN00058072)

5 fixed thresholds counted per year at Federal Post Office (ASN00058072): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Federal Post Office Thresholds

  • Federal Post Office: days with 10 mm (0.39 in) or more of precipitation in 40 years, most in 1972 with 71.
  • Federal Post Office: days with 25 mm (0.98 in) or more of precipitation in 40 years, most in 1967 with 34.
  • Federal Post Office: days with 50 mm (1.97 in) or more of precipitation in 40 years, most in 1988 with 20.
  • Federal Post Office: days with 100 mm (3.94 in) or more of precipitation in 30 years, most in 1988 with 9.
  • 5 fixed thresholds have at least one qualifying day at Federal Post Office.
40 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Federal Post Office Days per year at Federal Post Office with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 71 in 1972. 0204060801905: 401906: 501907: 501908: 451909: 371910: 521911: 411912: 361913: 371914: 491916: 521962: 611963: 661964: 481965: 471966: 321967: 621968: 301969: 471970: 501971: 461972: 711973: 551974: 481975: 581976: 521977: 371978: 541979: 371980: 411981: 481982: 501983: 641984: 431986: 351987: 451988: 661989: 631990: 501991: 371905190919131963196719711975197919831988
Days per year at Federal Post Office with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 71 in 1972.
Days with 10 mm (0.39 in) or more of precipitation per year at Federal Post Office
YearDaysDecade average
19054044.4
19065044.4
19075044.4
19084544.4
19093744.4
19105244.5
19114144.5
19123644.5
19133744.5
19144944.5
19165244.5
19626149.1
19636649.1
19644849.1
19654749.1
19663249.1
19676249.1
19683049.1
19694749.1
19705050.8
19714650.8
19727150.8
19735550.8
19744850.8
19755850.8
19765250.8
19773750.8
19785450.8
19793750.8
19804150.6
19814850.6
19825050.6
19836450.6
19844350.6
19863550.6
19874550.6
19886650.6
19896350.6
19905043.5
19913743.5
First to last qualifying date each year at Federal Post Office For each year, a bar from the first to the last day at Federal Post Office meeting 10 mm (0.39 in). 1905: 16 January 1905 to 29 December 19051906: 2 January 1906 to 30 December 19061907: 3 January 1907 to 20 December 19071908: 5 January 1908 to 28 December 19081909: 11 January 1909 to 27 December 19091910: 7 January 1910 to 19 December 19101911: 10 January 1911 to 17 December 19111912: 2 January 1912 to 23 December 19121913: 2 January 1913 to 20 December 19131914: 14 January 1914 to 30 December 19141916: 16 January 1916 to 28 December 19161962: 2 January 1962 to 31 December 19621963: 1 January 1963 to 31 December 19631964: 31 January 1964 to 30 December 19641965: 11 January 1965 to 22 December 19651966: 19 January 1966 to 30 December 19661967: 1 January 1967 to 30 December 19671968: 6 January 1968 to 5 December 19681969: 1 January 1969 to 24 December 19691970: 2 January 1970 to 30 December 19701971: 14 January 1971 to 28 December 19711972: 5 January 1972 to 20 December 19721973: 8 January 1973 to 26 December 19731974: 4 January 1974 to 27 November 19741975: 9 January 1975 to 27 December 19751976: 14 January 1976 to 25 December 19761977: 4 January 1977 to 23 December 19771978: 20 January 1978 to 31 December 19781979: 19 January 1979 to 16 December 19791980: 6 January 1980 to 31 December 19801981: 1 January 1981 to 30 December 19811982: 16 January 1982 to 27 December 19821983: 2 January 1983 to 31 December 19831984: 5 January 1984 to 30 December 19841986: 7 January 1986 to 23 December 19861987: 20 January 1987 to 23 December 19871988: 1 January 1988 to 28 December 19881989: 14 January 1989 to 26 December 19891990: 12 January 1990 to 31 December 19901991: 19 January 1991 to 31 December 199119051910191619661971197619811987JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Federal Post Office meeting 10 mm (0.39 in).
First to last qualifying date each year at Federal Post Office
YearFirst dateLast date
19051905-01-161905-12-29
19061906-01-021906-12-30
19071907-01-031907-12-20
19081908-01-051908-12-28
19091909-01-111909-12-27
19101910-01-071910-12-19
19111911-01-101911-12-17
19121912-01-021912-12-23
19131913-01-021913-12-20
19141914-01-141914-12-30
19161916-01-161916-12-28
19621962-01-021962-12-31
19631963-01-011963-12-31
19641964-01-311964-12-30
19651965-01-111965-12-22
19661966-01-191966-12-30
19671967-01-011967-12-30
19681968-01-061968-12-05
19691969-01-011969-12-24
19701970-01-021970-12-30
19711971-01-141971-12-28
19721972-01-051972-12-20
19731973-01-081973-12-26
19741974-01-041974-11-27
19751975-01-091975-12-27
19761976-01-141976-12-25
19771977-01-041977-12-23
19781978-01-201978-12-31
19791979-01-191979-12-16
19801980-01-061980-12-31
19811981-01-011981-12-30
19821982-01-161982-12-27
19831983-01-021983-12-31
19841984-01-051984-12-30
19861986-01-071986-12-23
19871987-01-201987-12-23
19881988-01-011988-12-28
19891989-01-141989-12-26
19901990-01-121990-12-31
19911991-01-191991-12-31

Every Fixed Threshold

Fixed thresholds at Federal Post Office
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4071197237
25 mm (0.98 in): Days with 25 mm or more rain4034196717
50 mm (1.97 in): Days with 50 mm or more rain402019887
100 mm (3.94 in): Days with 100 mm or more rain30919882
200 mm (7.87 in): Days with 200 mm or more rain7219872

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1905.

Download the Data

  • Data for Federal Post Office 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).