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Built 2026-10-19 (19 October 2026)

Petropolis Threshold Days by Year (BR002243009)

4 fixed thresholds counted per year at Petropolis (BR002243009): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Petropolis Thresholds

  • Petropolis: days with 10 mm (0.39 in) or more of precipitation in 43 years, most in 1991 with 98.
  • Petropolis: days with 25 mm (0.98 in) or more of precipitation in 43 years, most in 1947 with 41.
  • Petropolis: days with 50 mm (1.97 in) or more of precipitation in 43 years, most in 1942 with 15.
  • Petropolis: days with 100 mm (3.94 in) or more of precipitation in 18 years, most in 1964 with 4.
  • 4 fixed thresholds have at least one qualifying day at Petropolis.
43 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Petropolis Days per year at Petropolis with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 98 in 1991. 02550751001939: 561940: 611941: 771942: 671943: 701944: 551945: 751946: 561947: 771948: 651949: 651950: 601954: 261956: 681957: 621958: 631959: 551960: 801961: 551962: 641964: 701965: 631971: 541972: 501973: 631974: 621975: 611976: 691977: 491982: 711983: 811984: 361985: 651986: 531987: 791988: 811989: 681990: 551991: 981992: 701993: 741994: 771995: 65193919441949195819641974198319881993
Days per year at Petropolis with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 98 in 1991.
Days with 10 mm (0.39 in) or more of precipitation per year at Petropolis
YearDaysDecade average
19395656
19406166.8
19417766.8
19426766.8
19437066.8
19445566.8
19457566.8
19465666.8
19477766.8
19486566.8
19496566.8
19506055.7
19542655.7
19566855.7
19576255.7
19586355.7
19595555.7
19608066.4
19615566.4
19626466.4
19647066.4
19656366.4
19715458.3
19725058.3
19736358.3
19746258.3
19756158.3
19766958.3
19774958.3
19827166.8
19838166.8
19843666.8
19856566.8
19865366.8
19877966.8
19888166.8
19896866.8
19905573.2
19919873.2
19927073.2
19937473.2
19947773.2
19956573.2
First to last qualifying date each year at Petropolis For each year, a bar from the first to the last day at Petropolis meeting 10 mm (0.39 in). 1939: 11 January 1939 to 29 December 19391940: 8 January 1940 to 24 December 19401941: 1 January 1941 to 31 December 19411942: 1 January 1942 to 29 December 19421943: 4 January 1943 to 28 December 19431944: 1 January 1944 to 25 December 19441945: 2 January 1945 to 30 December 19451946: 1 January 1946 to 27 December 19461947: 2 January 1947 to 30 December 19471948: 12 January 1948 to 26 December 19481949: 8 January 1949 to 30 December 19491950: 7 January 1950 to 17 December 19501954: 19 February 1954 to 30 December 19541956: 1 January 1956 to 27 December 19561957: 10 January 1957 to 18 December 19571958: 19 January 1958 to 27 December 19581959: 3 January 1959 to 29 December 19591960: 1 January 1960 to 31 December 19601961: 4 January 1961 to 31 December 19611962: 4 January 1962 to 28 December 19621964: 3 January 1964 to 30 December 19641965: 4 January 1965 to 31 December 19651971: 1 January 1971 to 26 December 19711972: 7 January 1972 to 31 December 19721973: 1 February 1973 to 26 December 19731974: 1 January 1974 to 28 December 19741975: 1 January 1975 to 25 December 19751976: 1 January 1976 to 29 December 19761977: 11 January 1977 to 23 December 19771982: 2 January 1982 to 31 December 19821983: 2 January 1983 to 26 December 19831984: 6 January 1984 to 27 November 19841985: 3 January 1985 to 14 December 19851986: 3 January 1986 to 30 December 19861987: 1 January 1987 to 31 December 19871988: 1 January 1988 to 31 December 19881989: 1 January 1989 to 27 December 19891990: 1 January 1990 to 29 December 19901991: 5 January 1991 to 31 December 19911992: 1 January 1992 to 20 December 19921993: 2 January 1993 to 31 December 19931994: 4 January 1994 to 25 December 19941995: 1 January 1995 to 29 December 199519391945195419611973198319891995JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Petropolis meeting 10 mm (0.39 in).
First to last qualifying date each year at Petropolis
YearFirst dateLast date
19391939-01-111939-12-29
19401940-01-081940-12-24
19411941-01-011941-12-31
19421942-01-011942-12-29
19431943-01-041943-12-28
19441944-01-011944-12-25
19451945-01-021945-12-30
19461946-01-011946-12-27
19471947-01-021947-12-30
19481948-01-121948-12-26
19491949-01-081949-12-30
19501950-01-071950-12-17
19541954-02-191954-12-30
19561956-01-011956-12-27
19571957-01-101957-12-18
19581958-01-191958-12-27
19591959-01-031959-12-29
19601960-01-011960-12-31
19611961-01-041961-12-31
19621962-01-041962-12-28
19641964-01-031964-12-30
19651965-01-041965-12-31
19711971-01-011971-12-26
19721972-01-071972-12-31
19731973-02-011973-12-26
19741974-01-011974-12-28
19751975-01-011975-12-25
19761976-01-011976-12-29
19771977-01-111977-12-23
19821982-01-021982-12-31
19831983-01-021983-12-26
19841984-01-061984-11-27
19851985-01-031985-12-14
19861986-01-031986-12-30
19871987-01-011987-12-31
19881988-01-011988-12-31
19891989-01-011989-12-27
19901990-01-011990-12-29
19911991-01-051991-12-31
19921992-01-011992-12-20
19931993-01-021993-12-31
19941994-01-041994-12-25
19951995-01-011995-12-29

Every Fixed Threshold

Fixed thresholds at Petropolis
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4398199165
25 mm (0.98 in): Days with 25 mm or more rain4341194724
50 mm (1.97 in): Days with 50 mm or more rain431519424
100 mm (3.94 in): Days with 100 mm or more rain18419641

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1939.

Download the Data

  • Data for Petropolis 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).