Lammi Kostila Threshold Days by Year (FIE00142966)

3 fixed thresholds counted per year at Lammi Kostila (FIE00142966): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Lammi Kostila Thresholds

Lammi Kostila: days with 10 mm (0.39 in) or more of precipitation in 35 years, most in 1974 with 23.
Lammi Kostila: days with 25 mm (0.98 in) or more of precipitation in 26 years, most in 1972 with 4.
Lammi Kostila: days with 50 mm (1.97 in) or more of precipitation in 5 years, most in 1988 with 2.
3 fixed thresholds have at least one qualifying day at Lammi Kostila.

Days with 10 mm (0.39 in) or more of precipitation

35 years with a qualifying day

Days per year at Lammi Kostila with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 23 in 1974.

Days with 10 mm (0.39 in) or more of precipitation per year at Lammi Kostila
Year	Days	Decade average
1969	10	10
1970	13	13.9
1971	10	13.9
1972	14	13.9
1973	15	13.9
1974	23	13.9
1975	13	13.9
1976	8	13.9
1977	14	13.9
1978	12	13.9
1979	17	13.9
1980	17	15.6
1981	17	15.6
1982	14	15.6
1983	10	15.6
1984	16	15.6
1985	13	15.6
1986	18	15.6
1987	15	15.6
1988	21	15.6
1989	15	15.6
1990	13	13.9
1991	12	13.9
1992	16	13.9
1993	21	13.9
1994	14	13.9
1995	12	13.9
1996	8	13.9
1997	13	13.9
1998	17	13.9
1999	13	13.9
2000	21	16.3
2001	13	16.3
2003	14	16.3
2005	17	16.3

For each year, a bar from the first to the last day at Lammi Kostila meeting 10 mm (0.39 in).

First to last qualifying date each year at Lammi Kostila
Year	First date	Last date
1969	1969-01-29	1969-11-23
1970	1970-01-01	1970-12-31
1971	1971-03-07	1971-12-21
1972	1972-02-08	1972-10-24
1973	1973-04-30	1973-11-14
1974	1974-01-29	1974-12-17
1975	1975-03-15	1975-12-07
1976	1976-01-20	1976-11-01
1977	1977-04-18	1977-11-04
1978	1978-03-06	1978-09-01
1979	1979-01-07	1979-11-29
1980	1980-06-24	1980-12-15
1981	1981-06-12	1981-11-19
1982	1982-05-28	1982-12-21
1983	1983-01-17	1983-12-30
1984	1984-01-03	1984-09-24
1985	1985-04-07	1985-12-26
1986	1986-04-19	1986-12-05
1987	1987-01-25	1987-12-16
1988	1988-03-28	1988-12-21
1989	1989-01-08	1989-12-06
1990	1990-02-25	1990-12-30
1991	1991-01-09	1991-12-23
1992	1992-03-15	1992-11-24
1993	1993-01-22	1993-12-04
1994	1994-01-16	1994-10-03
1995	1995-01-08	1995-11-17
1996	1996-06-18	1996-11-28
1997	1997-01-08	1997-12-26
1998	1998-01-29	1998-10-30
1999	1999-02-15	1999-12-12
2000	2000-01-20	2000-11-30
2001	2001-02-06	2001-12-18
2003	2003-01-21	2003-12-28
2005	2005-01-30	2005-12-25

Every Fixed Threshold

Fixed thresholds at Lammi Kostila
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
10 mm (0.39 in): Days with 10 mm or more rain	35	23	1974	17
25 mm (0.98 in): Days with 25 mm or more rain	26	4	1972	1
50 mm (1.97 in): Days with 50 mm or more rain	5	2	1988	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1969.

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Data for Lammi Kostila 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Lammi Kostila Threshold Days by Year (FIE00142966)

Key Facts for Lammi Kostila Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

Download the Data

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