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Built 2026-10-19 (19 October 2026)

Vihti Siippoo Threshold Days by Year (FIE00142141)

2 fixed thresholds counted per year at Vihti Siippoo (FIE00142141): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Vihti Siippoo Thresholds

  • Vihti Siippoo: days with 10 mm (0.39 in) or more of precipitation in 38 years, most in 1981 with 28.
  • Vihti Siippoo: days with 25 mm (0.98 in) or more of precipitation in 31 years, most in 2004 with 6.
  • 2 fixed thresholds have at least one qualifying day at Vihti Siippoo.
38 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Vihti Siippoo Days per year at Vihti Siippoo with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 28 in 1981. 01020301968: 141970: 201971: 91972: 191973: 141974: 201975: 121976: 111977: 191978: 121979: 151980: 181981: 281982: 141983: 131984: 231985: 211986: 221987: 151988: 181989: 161990: 181991: 251992: 181993: 111994: 221995: 191996: 191997: 171998: 211999: 172000: 202001: 242002: 152003: 112004: 192005: 222006: 121968197319771981198519891993199720012005
Days per year at Vihti Siippoo with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 28 in 1981.
Days with 10 mm (0.39 in) or more of precipitation per year at Vihti Siippoo
YearDaysDecade average
19681414
19702015.1
1971915.1
19721915.1
19731415.1
19742015.1
19751215.1
19761115.1
19771915.1
19781215.1
19791515.1
19801818.8
19812818.8
19821418.8
19831318.8
19842318.8
19852118.8
19862218.8
19871518.8
19881818.8
19891618.8
19901818.7
19912518.7
19921818.7
19931118.7
19942218.7
19951918.7
19961918.7
19971718.7
19982118.7
19991718.7
20002017.6
20012417.6
20021517.6
20031117.6
20041917.6
20052217.6
20061217.6
First to last qualifying date each year at Vihti Siippoo For each year, a bar from the first to the last day at Vihti Siippoo meeting 10 mm (0.39 in). 1968: 7 April 1968 to 31 October 19681970: 2 January 1970 to 20 December 19701971: 7 January 1971 to 21 December 19711972: 27 March 1972 to 6 December 19721973: 5 February 1973 to 12 November 19731974: 15 January 1974 to 18 December 19741975: 5 January 1975 to 29 November 19751976: 20 January 1976 to 1 December 19761977: 27 January 1977 to 24 November 19771978: 23 April 1978 to 14 November 19781979: 26 January 1979 to 17 December 19791980: 24 June 1980 to 15 December 19801981: 13 March 1981 to 15 December 19811982: 30 January 1982 to 20 December 19821983: 13 January 1983 to 30 December 19831984: 3 January 1984 to 21 December 19841985: 22 January 1985 to 26 December 19851986: 19 April 1986 to 5 December 19861987: 28 March 1987 to 17 October 19871988: 11 March 1988 to 30 December 19881989: 15 January 1989 to 6 December 19891990: 26 January 1990 to 17 November 19901991: 9 January 1991 to 23 December 19911992: 15 January 1992 to 6 November 19921993: 15 January 1993 to 19 December 19931994: 13 January 1994 to 31 December 19941995: 23 January 1995 to 18 December 19951996: 15 February 1996 to 28 November 19961997: 9 February 1997 to 10 November 19971998: 2 February 1998 to 24 December 19981999: 4 February 1999 to 18 December 19992000: 29 January 2000 to 13 December 20002001: 6 February 2001 to 15 November 20012002: 24 January 2002 to 26 November 20022003: 16 May 2003 to 27 December 20032004: 31 January 2004 to 30 December 20042005: 8 January 2005 to 30 November 20052006: 20 April 2006 to 5 December 200619681974197919841989199419992004JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Vihti Siippoo meeting 10 mm (0.39 in).
First to last qualifying date each year at Vihti Siippoo
YearFirst dateLast date
19681968-04-071968-10-31
19701970-01-021970-12-20
19711971-01-071971-12-21
19721972-03-271972-12-06
19731973-02-051973-11-12
19741974-01-151974-12-18
19751975-01-051975-11-29
19761976-01-201976-12-01
19771977-01-271977-11-24
19781978-04-231978-11-14
19791979-01-261979-12-17
19801980-06-241980-12-15
19811981-03-131981-12-15
19821982-01-301982-12-20
19831983-01-131983-12-30
19841984-01-031984-12-21
19851985-01-221985-12-26
19861986-04-191986-12-05
19871987-03-281987-10-17
19881988-03-111988-12-30
19891989-01-151989-12-06
19901990-01-261990-11-17
19911991-01-091991-12-23
19921992-01-151992-11-06
19931993-01-151993-12-19
19941994-01-131994-12-31
19951995-01-231995-12-18
19961996-02-151996-11-28
19971997-02-091997-11-10
19981998-02-021998-12-24
19991999-02-041999-12-18
20002000-01-292000-12-13
20012001-02-062001-11-15
20022002-01-242002-11-26
20032003-05-162003-12-27
20042004-01-312004-12-30
20052005-01-082005-11-30
20062006-04-202006-12-05

Every Fixed Threshold

Fixed thresholds at Vihti Siippoo
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3828198112
25 mm (0.98 in): Days with 25 mm or more rain31620042

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 Vihti Siippoo 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).