Merimasku Sannainen Threshold Days by Year (FIE00141850)
3 fixed thresholds counted per year at Merimasku Sannainen (FIE00141850): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Merimasku Sannainen Thresholds
- Merimasku Sannainen: days with 10 mm (0.39 in) or more of precipitation in 42 years, most in 1977 with 26.
- Merimasku Sannainen: days with 25 mm (0.98 in) or more of precipitation in 32 years, most in 1980 with 6.
- Merimasku Sannainen: days with 50 mm (1.97 in) or more of precipitation in 3 years, most in 1993 with 2.
- 3 fixed thresholds have at least one qualifying day at Merimasku Sannainen.
Days with 10 mm (0.39 in) or more of precipitation
42 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1965 | 10 | 15.5 |
| 1966 | 12 | 15.5 |
| 1968 | 18 | 15.5 |
| 1969 | 22 | 15.5 |
| 1970 | 12 | 13.1 |
| 1971 | 9 | 13.1 |
| 1972 | 10 | 13.1 |
| 1973 | 8 | 13.1 |
| 1974 | 23 | 13.1 |
| 1975 | 6 | 13.1 |
| 1976 | 6 | 13.1 |
| 1977 | 26 | 13.1 |
| 1978 | 17 | 13.1 |
| 1979 | 14 | 13.1 |
| 1980 | 20 | 21.3 |
| 1981 | 25 | 21.3 |
| 1982 | 17 | 21.3 |
| 1983 | 19 | 21.3 |
| 1984 | 25 | 21.3 |
| 1985 | 19 | 21.3 |
| 1986 | 25 | 21.3 |
| 1987 | 21 | 21.3 |
| 1988 | 19 | 21.3 |
| 1989 | 23 | 21.3 |
| 1990 | 23 | 19.5 |
| 1991 | 25 | 19.5 |
| 1992 | 20 | 19.5 |
| 1993 | 14 | 19.5 |
| 1994 | 19 | 19.5 |
| 1995 | 19 | 19.5 |
| 1996 | 19 | 19.5 |
| 1997 | 24 | 19.5 |
| 1998 | 15 | 19.5 |
| 1999 | 17 | 19.5 |
| 2000 | 20 | 18.4 |
| 2001 | 23 | 18.4 |
| 2002 | 12 | 18.4 |
| 2003 | 15 | 18.4 |
| 2004 | 19 | 18.4 |
| 2005 | 18 | 18.4 |
| 2006 | 23 | 18.4 |
| 2007 | 17 | 18.4 |
| Year | First date | Last date |
|---|---|---|
| 1965 | 1965-01-17 | 1965-12-10 |
| 1966 | 1966-04-20 | 1966-12-18 |
| 1968 | 1968-04-03 | 1968-11-28 |
| 1969 | 1969-01-28 | 1969-12-31 |
| 1970 | 1970-02-03 | 1970-12-20 |
| 1971 | 1971-01-31 | 1971-12-24 |
| 1972 | 1972-02-08 | 1972-11-01 |
| 1973 | 1973-01-27 | 1973-11-19 |
| 1974 | 1974-01-15 | 1974-12-22 |
| 1975 | 1975-03-15 | 1975-11-29 |
| 1976 | 1976-03-29 | 1976-09-10 |
| 1977 | 1977-04-05 | 1977-12-30 |
| 1978 | 1978-01-01 | 1978-09-24 |
| 1979 | 1979-04-30 | 1979-12-16 |
| 1980 | 1980-06-24 | 1980-11-20 |
| 1981 | 1981-01-14 | 1981-12-26 |
| 1982 | 1982-04-10 | 1982-12-20 |
| 1983 | 1983-01-13 | 1983-12-30 |
| 1984 | 1984-01-11 | 1984-12-21 |
| 1985 | 1985-03-10 | 1985-12-13 |
| 1986 | 1986-01-05 | 1986-12-05 |
| 1987 | 1987-03-28 | 1987-11-19 |
| 1988 | 1988-03-28 | 1988-12-30 |
| 1989 | 1989-01-01 | 1989-12-10 |
| 1990 | 1990-01-23 | 1990-11-16 |
| 1991 | 1991-01-02 | 1991-12-20 |
| 1992 | 1992-02-03 | 1992-12-11 |
| 1993 | 1993-02-19 | 1993-12-19 |
| 1994 | 1994-01-13 | 1994-12-10 |
| 1995 | 1995-01-08 | 1995-12-10 |
| 1996 | 1996-03-28 | 1996-12-13 |
| 1997 | 1997-02-11 | 1997-12-30 |
| 1998 | 1998-01-04 | 1998-12-28 |
| 1999 | 1999-01-24 | 1999-12-17 |
| 2000 | 2000-03-01 | 2000-12-15 |
| 2001 | 2001-02-06 | 2001-11-21 |
| 2002 | 2002-01-24 | 2002-11-20 |
| 2003 | 2003-01-14 | 2003-12-28 |
| 2004 | 2004-01-31 | 2004-12-30 |
| 2005 | 2005-01-08 | 2005-12-31 |
| 2006 | 2006-03-31 | 2006-12-11 |
| 2007 | 2007-01-07 | 2007-12-08 |
Every Fixed Threshold
| 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 | 42 | 26 | 1977 | 17 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 32 | 6 | 1980 | 5 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 3 | 2 | 1993 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1965.
Download the Data
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).