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Built 2026-10-19 (19 October 2026)

Porvoo Norrveckoski Threshold Days by Year (FIE00142286)

3 fixed thresholds counted per year at Porvoo Norrveckoski (FIE00142286): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Porvoo Norrveckoski Thresholds

  • Porvoo Norrveckoski: days with 10 mm (0.39 in) or more of precipitation in 38 years, most in 1974 with 32.
  • Porvoo Norrveckoski: days with 25 mm (0.98 in) or more of precipitation in 28 years, most in 2005 with 8.
  • Porvoo Norrveckoski: days with 50 mm (1.97 in) or more of precipitation in 3 years, most in 1972 with 2.
  • 3 fixed thresholds have at least one qualifying day at Porvoo Norrveckoski.
38 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Porvoo Norrveckoski Days per year at Porvoo Norrveckoski with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 32 in 1974. 0102030401968: 131970: 181971: 91972: 151973: 101974: 321975: 71976: 81977: 201978: 121979: 171980: 191981: 211982: 201983: 171984: 281985: 191986: 231987: 171988: 221989: 231990: 251991: 201992: 241993: 181994: 261995: 151996: 251997: 161998: 251999: 212000: 262001: 202002: 162003: 192004: 322005: 242006: 81968197319771981198519891993199720012005
Days per year at Porvoo Norrveckoski with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 32 in 1974.
Days with 10 mm (0.39 in) or more of precipitation per year at Porvoo Norrveckoski
YearDaysDecade average
19681313
19701814.8
1971914.8
19721514.8
19731014.8
19743214.8
1975714.8
1976814.8
19772014.8
19781214.8
19791714.8
19801920.9
19812120.9
19822020.9
19831720.9
19842820.9
19851920.9
19862320.9
19871720.9
19882220.9
19892320.9
19902521.5
19912021.5
19922421.5
19931821.5
19942621.5
19951521.5
19962521.5
19971621.5
19982521.5
19992121.5
20002620.7
20012020.7
20021620.7
20031920.7
20043220.7
20052420.7
2006820.7
First to last qualifying date each year at Porvoo Norrveckoski For each year, a bar from the first to the last day at Porvoo Norrveckoski meeting 10 mm (0.39 in). 1968: 2 April 1968 to 31 October 19681970: 2 January 1970 to 20 December 19701971: 13 February 1971 to 21 December 19711972: 27 March 1972 to 6 December 19721973: 5 February 1973 to 15 October 19731974: 15 January 1974 to 20 December 19741975: 24 January 1975 to 7 December 19751976: 20 January 1976 to 12 September 19761977: 6 April 1977 to 24 November 19771978: 6 March 1978 to 14 November 19781979: 12 January 1979 to 17 December 19791980: 25 May 1980 to 31 December 19801981: 12 January 1981 to 20 November 19811982: 30 January 1982 to 20 December 19821983: 2 January 1983 to 30 December 19831984: 3 January 1984 to 22 December 19841985: 27 March 1985 to 21 December 19851986: 2 June 1986 to 5 December 19861987: 13 February 1987 to 22 November 19871988: 1 January 1988 to 30 December 19881989: 2 January 1989 to 21 December 19891990: 15 January 1990 to 17 November 19901991: 3 January 1991 to 23 December 19911992: 14 January 1992 to 4 December 19921993: 21 January 1993 to 19 December 19931994: 13 January 1994 to 31 December 19941995: 23 January 1995 to 17 November 19951996: 15 February 1996 to 28 November 19961997: 8 January 1997 to 2 December 19971998: 16 January 1998 to 24 December 19981999: 4 January 1999 to 12 December 19992000: 29 January 2000 to 13 December 20002001: 6 February 2001 to 22 November 20012002: 24 January 2002 to 20 November 20022003: 20 January 2003 to 27 December 20032004: 31 January 2004 to 23 December 20042005: 2 January 2005 to 28 November 20052006: 14 May 2006 to 26 October 200619681974197919841989199419992004JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Porvoo Norrveckoski meeting 10 mm (0.39 in).
First to last qualifying date each year at Porvoo Norrveckoski
YearFirst dateLast date
19681968-04-021968-10-31
19701970-01-021970-12-20
19711971-02-131971-12-21
19721972-03-271972-12-06
19731973-02-051973-10-15
19741974-01-151974-12-20
19751975-01-241975-12-07
19761976-01-201976-09-12
19771977-04-061977-11-24
19781978-03-061978-11-14
19791979-01-121979-12-17
19801980-05-251980-12-31
19811981-01-121981-11-20
19821982-01-301982-12-20
19831983-01-021983-12-30
19841984-01-031984-12-22
19851985-03-271985-12-21
19861986-06-021986-12-05
19871987-02-131987-11-22
19881988-01-011988-12-30
19891989-01-021989-12-21
19901990-01-151990-11-17
19911991-01-031991-12-23
19921992-01-141992-12-04
19931993-01-211993-12-19
19941994-01-131994-12-31
19951995-01-231995-11-17
19961996-02-151996-11-28
19971997-01-081997-12-02
19981998-01-161998-12-24
19991999-01-041999-12-12
20002000-01-292000-12-13
20012001-02-062001-11-22
20022002-01-242002-11-20
20032003-01-202003-12-27
20042004-01-312004-12-23
20052005-01-022005-11-28
20062006-05-142006-10-26

Every Fixed Threshold

Fixed thresholds at Porvoo Norrveckoski
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain383219748
25 mm (0.98 in): Days with 25 mm or more rain28820051
50 mm (1.97 in): Days with 50 mm or more rain3219721

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1968.

Download the Data

  • Data for Porvoo Norrveckoski 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).