Hanko Tvarminne Weather Records (FIE00142025)
Record envelope, standing records and threshold days for Hanko Tvarminne (FIE00142025), Finland, with 64 years of record.
Key Facts for Hanko Tvarminne
- Hanko Tvarminne (FIE00142025) is a weather station in Finland at 59.84 latitude and 23.25 longitude, 3 m (10 ft) above sea level.
- The station reports from 1963 to 2026, 64 years of record.
- 1,464 records set at Hanko Tvarminne still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Hanko Tvarminne set a daily record high maximum temperature of 26.7 C (80.1 F) on 30 June 2026.
About the Station
- Location: Finland, 59.84 latitude, 23.25 longitude.
- Elevation: 3 m (10 ft).
- Period of record: 1963 to 2026, 64 years.
- Eligible elements: tmax, tmin, prcp.
Daily Record Envelope and 2026
5 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 8.0 C (46.4 F) | -33.9 C (-29.0 F) | 1.2 C (34.2 F) | -16.5 C (2.3 F) |
| Feb | 9.1 C (48.4 F) | -35.2 C (-31.4 F) | 2.6 C (36.7 F) | -23.0 C (-9.4 F) |
| Mar | 14.4 C (57.9 F) | -22.8 C (-9.0 F) | 9.0 C (48.2 F) | -3.4 C (25.9 F) |
| Apr | 19.7 C (67.5 F) | -16.0 C (3.2 F) | 16.1 C (61.0 F) | -1.2 C (29.8 F) |
| May | 25.6 C (78.1 F) | -3.4 C (25.9 F) | 20.2 C (68.4 F) | 0.5 C (32.9 F) |
| Jun | 30.9 C (87.6 F) | 2.5 C (36.5 F) | 26.7 C (80.1 F) | 8.0 C (46.4 F) |
| Jul | 31.1 C (88.0 F) | 4.6 C (40.3 F) | 27.9 C (82.2 F) | 10.7 C (51.3 F) |
| Aug | 30.3 C (86.5 F) | 4.5 C (40.1 F) | 22.7 C (72.9 F) | 9.4 C (48.9 F) |
| Sep | 23.6 C (74.5 F) | -2.4 C (27.7 F) | n/a | n/a |
| Oct | 17.6 C (63.7 F) | -9.2 C (15.4 F) | n/a | n/a |
| Nov | 14.4 C (57.9 F) | -14.9 C (5.2 F) | n/a | n/a |
| Dec | 9.5 C (49.1 F) | -31.3 C (-24.3 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1963 | 31 |
| 1964 | 12 |
| 1965 | 50 |
| 1966 | 39 |
| 1967 | 21 |
| 1968 | 40 |
| 1969 | 28 |
| 1970 | 26 |
| 1971 | 18 |
| 1972 | 10 |
| 1973 | 38 |
| 1974 | 11 |
| 1975 | 19 |
| 1976 | 21 |
| 1977 | 31 |
| 1978 | 41 |
| 1979 | 18 |
| 1980 | 20 |
| 1981 | 22 |
| 1982 | 20 |
| 1983 | 22 |
| 1984 | 10 |
| 1985 | 32 |
| 1986 | 16 |
| 1987 | 36 |
| 1988 | 16 |
| 1989 | 18 |
| 1990 | 27 |
| 1991 | 9 |
| 1992 | 20 |
| 1993 | 22 |
| 1994 | 10 |
| 1995 | 15 |
| 1996 | 10 |
| 1997 | 21 |
| 1998 | 14 |
| 1999 | 14 |
| 2000 | 23 |
| 2001 | 11 |
| 2002 | 39 |
| 2003 | 30 |
| 2004 | 11 |
| 2005 | 12 |
| 2006 | 27 |
| 2007 | 23 |
| 2008 | 14 |
| 2009 | 7 |
| 2010 | 21 |
| 2011 | 28 |
| 2012 | 9 |
| 2013 | 16 |
| 2014 | 20 |
| 2015 | 28 |
| 2016 | 15 |
| 2017 | 8 |
| 2018 | 37 |
| 2019 | 20 |
| 2020 | 65 |
| 2021 | 30 |
| 2022 | 27 |
| 2023 | 27 |
| 2024 | 41 |
| 2025 | 41 |
| 2026 | 6 |
All-Time Record Progression
5 new records| Date | Kind | Detail |
|---|---|---|
| 1997-08-10 | Record high minimum temperature | Record high minimum temperature 21.0 C (69.8 F) |
| 2003-08-01 | Record high minimum temperature | Record high minimum temperature 21.3 C (70.3 F) |
| 2003-08-02 | Record high minimum temperature | Record high minimum temperature 21.5 C (70.7 F) |
| 2018-07-18 | Record high minimum temperature | Record high minimum temperature 22.2 C (72.0 F) |
| 2018-07-28 | Record high minimum temperature | Record high minimum temperature 22.9 C (73.2 F) |
Wettest Day of Each Month
Aug: 70.8 mm (2.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 28.2 mm (1.1 in) | 31 January 2004 |
| Feb | 31.9 mm (1.3 in) | 16 February 2024 |
| Mar | 20.3 mm (0.8 in) | 6 March 2002 |
| Apr | 35.7 mm (1.4 in) | 2 April 2024 |
| May | 24.6 mm (1.0 in) | 4 May 1988 |
| Jun | 35.0 mm (1.4 in) | 24 June 1980 |
| Jul | 62.7 mm (2.5 in) | 12 July 1996 |
| Aug | 70.8 mm (2.8 in) | 14 August 1992 |
| Sep | 37.9 mm (1.5 in) | 17 September 1968 |
| Oct | 37.8 mm (1.5 in) | 31 October 2006 |
| Nov | 33.7 mm (1.3 in) | 20 November 2024 |
| Dec | 24.0 mm (0.9 in) | 21 December 2003 |
Period of Record Coverage
1963 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 364 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 365 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 361 | 99% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 364 | 100% | Yes |
| 2006 | 364 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 364 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 359 | 98% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 243 | 67% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 30 June 2026 | Hanko Tvarminne, FI | daily high max | 26.7 C (80.1 F) | 0.1 C (0.2 F) | 3 years | 6 of 100 (Routine) |
| 15 June 2026 | Hanko Tvarminne, FI | daily rain | 19.0 mm (0.7 in) | 5.7 mm (0.22 in) | 44 years | 20 of 100 (Routine) |
| 13 June 2026 | Hanko Tvarminne, FI | daily rain | 12.0 mm (0.5 in) | 0.8 mm (0.03 in) | 35 years | 17 of 100 (Routine) |
| 17 April 2026 | Hanko Tvarminne, FI | daily high max | 16.1 C (61.0 F) | 2.0 C (3.6 F) | 19 years | 16 of 100 (Routine) |
| 17 April 2026 | Hanko Tvarminne, FI | daily high min | 7.4 C (45.3 F) | 1.8 C (3.2 F) | 0 years | 12 of 100 (Routine) |
| 15 April 2026 | Hanko Tvarminne, FI | daily high max | 12.7 C (54.9 F) | 0.2 C (0.4 F) | 20 years | 12 of 100 (Routine) |
| 14 March 2026 | Hanko Tvarminne, FI | daily high min | 1.8 C (35.2 F) | 0.2 C (0.4 F) | 12 years | 9 of 100 (Routine) |
| 5 March 2026 | Hanko Tvarminne, FI | daily high max | 7.9 C (46.2 F) | 1.9 C (3.4 F) | 0 years | 11 of 100 (Routine) |
| 4 March 2026 | Hanko Tvarminne, FI | daily high max (Tie) | 5.6 C (42.1 F) | tie | 0 years | 1 of 100 (Routine) |
| 26 February 2026 | Hanko Tvarminne, FI | daily rain | 12.7 mm (0.5 in) | 2.0 mm (0.08 in) | 22 years | 18 of 100 (Routine) |
| 25 December 2025 | Hanko Tvarminne, FI | daily high max | 7.4 C (45.3 F) | 0.1 C (0.2 F) | 10 years | 9 of 100 (Routine) |
| 20 December 2025 | Hanko Tvarminne, FI | daily high min | 6.6 C (43.9 F) | 1.8 C (3.2 F) | 4 years | 10 of 100 (Routine) |
| 19 December 2025 | Hanko Tvarminne, FI | daily high min | 5.7 C (42.3 F) | 1.4 C (2.5 F) | 11 years | 11 of 100 (Routine) |
| 17 December 2025 | Hanko Tvarminne, FI | daily high min | 6.3 C (43.3 F) | 2.4 C (4.3 F) | 32 years | 19 of 100 (Routine) |
| 17 December 2025 | Hanko Tvarminne, FI | daily high max | 7.5 C (45.5 F) | 0.8 C (1.4 F) | 12 years | 10 of 100 (Routine) |
| 16 December 2025 | Hanko Tvarminne, FI | daily high min | 6.3 C (43.3 F) | 1.9 C (3.4 F) | 19 years | 14 of 100 (Routine) |
| 16 December 2025 | Hanko Tvarminne, FI | daily high max | 7.5 C (45.5 F) | 1.0 C (1.8 F) | 19 years | 13 of 100 (Routine) |
| 11 December 2025 | Hanko Tvarminne, FI | daily high max | 8.7 C (47.7 F) | 0.8 C (1.4 F) | 10 years | 10 of 100 (Routine) |
| 10 December 2025 | Hanko Tvarminne, FI | daily high max | 8.7 C (47.7 F) | 0.7 C (1.3 F) | 24 years | 14 of 100 (Routine) |
| 9 December 2025 | Hanko Tvarminne, FI | daily high max (Tie) | 7.8 C (46.0 F) | tie | 24 years | 3 of 100 (Routine) |
Climate Trend
63 complete years, 1963 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1963 | 4.4 C | -1.61 C |
| 1964 | 5.0 C | -0.97 C |
| 1965 | 4.6 C | -1.34 C |
| 1966 | 3.8 C | -2.17 C |
| 1967 | 5.3 C | -0.73 C |
| 1968 | 4.6 C | -1.38 C |
| 1969 | 4.0 C | -1.98 C |
| 1970 | 4.2 C | -1.82 C |
| 1971 | 5.2 C | -0.74 C |
| 1972 | 5.9 C | -0.05 C |
| 1973 | 5.6 C | -0.35 C |
| 1974 | 6.7 C | +0.70 C |
| 1975 | 7.1 C | +1.15 C |
| 1976 | 4.3 C | -1.69 C |
| 1977 | 4.6 C | -1.38 C |
| 1978 | 4.0 C | -2.00 C |
| 1979 | 4.5 C | -1.52 C |
| 1980 | 4.9 C | -1.08 C |
| 1981 | 5.0 C | -1.00 C |
| 1982 | 5.7 C | -0.25 C |
| 1983 | 6.0 C | 0.00 C |
| 1984 | 6.0 C | +0.02 C |
| 1985 | 3.5 C | -2.52 C |
| 1986 | 4.8 C | -1.23 C |
| 1987 | 3.4 C | -2.55 C |
| 1988 | 6.0 C | +0.01 C |
| 1989 | 7.2 C | +1.22 C |
| 1990 | 7.1 C | +1.10 C |
| 1991 | 6.4 C | +0.40 C |
| 1992 | 6.8 C | +0.80 C |
| 1993 | 5.8 C | -0.18 C |
| 1994 | 5.6 C | -0.39 C |
| 1995 | 6.5 C | +0.53 C |
| 1996 | 4.9 C | -1.11 C |
| 1997 | 6.5 C | +0.49 C |
| 1998 | 5.7 C | -0.25 C |
| 1999 | 6.5 C | +0.48 C |
| 2000 | 7.5 C | +1.48 C |
| 2001 | 6.3 C | +0.31 C |
| 2002 | 6.4 C | +0.39 C |
| 2003 | 5.8 C | -0.21 C |
| 2004 | 6.3 C | +0.29 C |
| 2005 | 6.6 C | +0.60 C |
| 2006 | 6.8 C | +0.77 C |
| 2007 | 7.1 C | +1.10 C |
| 2008 | 7.7 C | +1.69 C |
| 2009 | 6.3 C | +0.32 C |
| 2010 | 4.9 C | -1.10 C |
| 2011 | 7.0 C | +1.02 C |
| 2012 | 6.0 C | +0.04 C |
| 2013 | 6.6 C | +0.57 C |
| 2014 | 7.3 C | +1.34 C |
| 2015 | 7.7 C | +1.73 C |
| 2016 | 6.7 C | +0.67 C |
| 2017 | 6.8 C | +0.80 C |
| 2018 | 7.1 C | +1.08 C |
| 2019 | 7.4 C | +1.40 C |
| 2020 | 8.6 C | +2.62 C |
| 2021 | 6.6 C | +0.57 C |
| 2022 | 7.3 C | +1.29 C |
| 2023 | 7.0 C | +1.05 C |
| 2024 | 7.7 C | +1.68 C |
| 2025 | 8.1 C | +2.15 C |
The annual mean temperature here has risen by 0.5 C (0.4 to 0.6) per decade over 1963 to 2025. In Fahrenheit: 0.9 F (0.7 to 1.1) per decade. The slope is a straight line fitted to 63 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.5 C (0.4 to 0.6) per decade | 0.9 F (0.7 to 1.1) per decade | 1963 to 2025 | 63 | Rise |
| Mean daily maximum | 0.4 C (0.3 to 0.5) per decade | 0.8 F (0.6 to 1.0) per decade | 1963 to 2025 | 63 | Rise |
| Mean daily minimum | 0.5 C (0.4 to 0.7) per decade | 0.9 F (0.7 to 1.2) per decade | 1963 to 2025 | 63 | Rise |
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1963 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 31.1 C (88.0 F) | 1983 | 26.8 C (80.2 F) | 64 |
| Coldest night (TNn) | -35.2 C (-31.4 F) | 1966 | -20.9 C (-5.7 F) | 64 |
| Wettest day (Rx1day) | 70.8 mm (2.8 in) | 1992 | 28.5 mm (1.1 in) | 64 |
| Wettest five days (Rx5day) | 143.2 mm (5.6 in) | 2023 | 51.0 mm (2.0 in) | 64 |
| Longest dry spell (CDD) | 55 days | 1996 | 24 days | 64 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1963 | 25.6 C (78.1 F) |
| 1964 | 26.2 C (79.2 F) |
| 1965 | 24.8 C (76.6 F) |
| 1966 | 27.3 C (81.1 F) |
| 1967 | 25.0 C (77.0 F) |
| 1968 | 24.2 C (75.6 F) |
| 1969 | 28.0 C (82.4 F) |
| 1970 | 25.8 C (78.4 F) |
| 1971 | 26.8 C (80.2 F) |
| 1972 | 27.4 C (81.3 F) |
| 1973 | 29.8 C (85.6 F) |
| 1974 | 23.8 C (74.8 F) |
| 1975 | 30.3 C (86.5 F) |
| 1976 | 24.0 C (75.2 F) |
| 1977 | 25.1 C (77.2 F) |
| 1978 | 25.3 C (77.5 F) |
| 1979 | 22.1 C (71.8 F) |
| 1980 | 26.9 C (80.4 F) |
| 1981 | 24.1 C (75.4 F) |
| 1982 | 28.3 C (82.9 F) |
| 1983 | 31.1 C (88.0 F) |
| 1984 | 25.5 C (77.9 F) |
| 1985 | 26.8 C (80.2 F) |
| 1986 | 30.9 C (87.6 F) |
| 1987 | 25.9 C (78.6 F) |
| 1988 | 28.4 C (83.1 F) |
| 1989 | 27.1 C (80.8 F) |
| 1990 | 24.6 C (76.3 F) |
| 1991 | 27.2 C (81.0 F) |
| 1992 | 26.0 C (78.8 F) |
| 1993 | 24.7 C (76.5 F) |
| 1994 | 29.0 C (84.2 F) |
| 1995 | 27.2 C (81.0 F) |
| 1996 | 23.8 C (74.8 F) |
| 1997 | 28.3 C (82.9 F) |
| 1998 | 22.8 C (73.0 F) |
| 1999 | 27.2 C (81.0 F) |
| 2000 | 26.0 C (78.8 F) |
| 2001 | 26.8 C (80.2 F) |
| 2002 | 27.9 C (82.2 F) |
| 2003 | 29.3 C (84.7 F) |
| 2004 | 26.7 C (80.1 F) |
| 2005 | 28.7 C (83.7 F) |
| 2006 | 27.9 C (82.2 F) |
| 2007 | 26.6 C (79.9 F) |
| 2008 | 28.2 C (82.8 F) |
| 2009 | 29.3 C (84.7 F) |
| 2010 | 27.8 C (82.0 F) |
| 2011 | 27.2 C (81.0 F) |
| 2012 | 24.9 C (76.8 F) |
| 2013 | 27.4 C (81.3 F) |
| 2014 | 28.8 C (83.8 F) |
| 2015 | 25.6 C (78.1 F) |
| 2016 | 25.3 C (77.5 F) |
| 2017 | 23.0 C (73.4 F) |
| 2018 | 28.9 C (84.0 F) |
| 2019 | 30.9 C (87.6 F) |
| 2020 | 28.2 C (82.8 F) |
| 2021 | 29.1 C (84.4 F) |
| 2022 | 26.1 C (79.0 F) |
| 2023 | 26.6 C (79.9 F) |
| 2024 | 25.3 C (77.5 F) |
| 2025 | 26.8 C (80.2 F) |
| 2026 | 27.9 C (82.2 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1963 | -27.1 C (-16.8 F) |
| 1964 | -22.7 C (-8.9 F) |
| 1965 | -23.3 C (-9.9 F) |
| 1966 | -35.2 C (-31.4 F) |
| 1967 | -26.3 C (-15.3 F) |
| 1968 | -30.9 C (-23.6 F) |
| 1969 | -25.6 C (-14.1 F) |
| 1970 | -30.7 C (-23.3 F) |
| 1971 | -18.8 C (-1.8 F) |
| 1972 | -19.8 C (-3.6 F) |
| 1973 | -23.2 C (-9.8 F) |
| 1974 | -9.7 C (14.5 F) |
| 1975 | -17.5 C (0.5 F) |
| 1976 | -22.4 C (-8.3 F) |
| 1977 | -25.7 C (-14.3 F) |
| 1978 | -31.3 C (-24.3 F) |
| 1979 | -30.0 C (-22.0 F) |
| 1980 | -25.3 C (-13.5 F) |
| 1981 | -22.4 C (-8.3 F) |
| 1982 | -27.6 C (-17.7 F) |
| 1983 | -16.7 C (1.9 F) |
| 1984 | -18.0 C (-0.4 F) |
| 1985 | -30.0 C (-22.0 F) |
| 1986 | -23.1 C (-9.6 F) |
| 1987 | -33.9 C (-29.0 F) |
| 1988 | -15.8 C (3.6 F) |
| 1989 | -20.2 C (-4.4 F) |
| 1990 | -12.6 C (9.3 F) |
| 1991 | -14.8 C (5.4 F) |
| 1992 | -13.9 C (7.0 F) |
| 1993 | -15.6 C (3.9 F) |
| 1994 | -21.7 C (-7.1 F) |
| 1995 | -19.8 C (-3.6 F) |
| 1996 | -22.2 C (-8.0 F) |
| 1997 | -17.4 C (0.7 F) |
| 1998 | -17.2 C (1.0 F) |
| 1999 | -25.6 C (-14.1 F) |
| 2000 | -14.1 C (6.6 F) |
| 2001 | -24.5 C (-12.1 F) |
| 2002 | -22.4 C (-8.3 F) |
| 2003 | -26.3 C (-15.3 F) |
| 2004 | -16.5 C (2.3 F) |
| 2005 | -18.3 C (-0.9 F) |
| 2006 | -22.2 C (-8.0 F) |
| 2007 | -20.1 C (-4.2 F) |
| 2008 | -10.4 C (13.3 F) |
| 2009 | -12.6 C (9.3 F) |
| 2010 | -21.8 C (-7.2 F) |
| 2011 | -22.4 C (-8.3 F) |
| 2012 | -22.5 C (-8.5 F) |
| 2013 | -22.0 C (-7.6 F) |
| 2014 | -14.9 C (5.2 F) |
| 2015 | -11.6 C (11.1 F) |
| 2016 | -24.2 C (-11.6 F) |
| 2017 | -17.5 C (0.5 F) |
| 2018 | -18.1 C (-0.6 F) |
| 2019 | -16.0 C (3.2 F) |
| 2020 | -7.9 C (17.8 F) |
| 2021 | -19.2 C (-2.6 F) |
| 2022 | -11.4 C (11.5 F) |
| 2023 | -14.2 C (6.4 F) |
| 2024 | -19.5 C (-3.1 F) |
| 2025 | -12.5 C (9.5 F) |
| 2026 | -23.0 C (-9.4 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1963 | 21.0 mm (0.8 in) |
| 1964 | 16.8 mm (0.7 in) |
| 1965 | 19.1 mm (0.8 in) |
| 1966 | 45.0 mm (1.8 in) |
| 1967 | 33.8 mm (1.3 in) |
| 1968 | 37.9 mm (1.5 in) |
| 1969 | 22.7 mm (0.9 in) |
| 1970 | 35.5 mm (1.4 in) |
| 1971 | 21.5 mm (0.8 in) |
| 1972 | 33.0 mm (1.3 in) |
| 1973 | 27.8 mm (1.1 in) |
| 1974 | 25.0 mm (1.0 in) |
| 1975 | 16.0 mm (0.6 in) |
| 1976 | 17.2 mm (0.7 in) |
| 1977 | 27.0 mm (1.1 in) |
| 1978 | 29.4 mm (1.2 in) |
| 1979 | 21.5 mm (0.8 in) |
| 1980 | 35.0 mm (1.4 in) |
| 1981 | 29.7 mm (1.2 in) |
| 1982 | 27.1 mm (1.1 in) |
| 1983 | 20.9 mm (0.8 in) |
| 1984 | 23.0 mm (0.9 in) |
| 1985 | 28.8 mm (1.1 in) |
| 1986 | 33.0 mm (1.3 in) |
| 1987 | 49.6 mm (2.0 in) |
| 1988 | 30.2 mm (1.2 in) |
| 1989 | 21.0 mm (0.8 in) |
| 1990 | 23.3 mm (0.9 in) |
| 1991 | 31.1 mm (1.2 in) |
| 1992 | 70.8 mm (2.8 in) |
| 1993 | 34.8 mm (1.4 in) |
| 1994 | 24.4 mm (1.0 in) |
| 1995 | 28.0 mm (1.1 in) |
| 1996 | 62.7 mm (2.5 in) |
| 1997 | 22.2 mm (0.9 in) |
| 1998 | 18.1 mm (0.7 in) |
| 1999 | 26.8 mm (1.1 in) |
| 2000 | 30.5 mm (1.2 in) |
| 2001 | 37.6 mm (1.5 in) |
| 2002 | 20.3 mm (0.8 in) |
| 2003 | 24.0 mm (0.9 in) |
| 2004 | 28.2 mm (1.1 in) |
| 2005 | 39.2 mm (1.5 in) |
| 2006 | 37.8 mm (1.5 in) |
| 2007 | 31.4 mm (1.2 in) |
| 2008 | 25.7 mm (1.0 in) |
| 2009 | 30.4 mm (1.2 in) |
| 2010 | 35.4 mm (1.4 in) |
| 2011 | 37.2 mm (1.5 in) |
| 2012 | 62.0 mm (2.4 in) |
| 2013 | 38.7 mm (1.5 in) |
| 2014 | 45.8 mm (1.8 in) |
| 2015 | 19.7 mm (0.8 in) |
| 2016 | 37.7 mm (1.5 in) |
| 2017 | 17.8 mm (0.7 in) |
| 2018 | 22.2 mm (0.9 in) |
| 2019 | 37.2 mm (1.5 in) |
| 2020 | 35.9 mm (1.4 in) |
| 2021 | 22.7 mm (0.9 in) |
| 2022 | 28.1 mm (1.1 in) |
| 2023 | 65.9 mm (2.6 in) |
| 2024 | 35.7 mm (1.4 in) |
| 2025 | 23.9 mm (0.9 in) |
| 2026 | 19.0 mm (0.7 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1963 | 46.1 mm (1.8 in) |
| 1964 | 36.3 mm (1.4 in) |
| 1965 | 40.4 mm (1.6 in) |
| 1966 | 63.3 mm (2.5 in) |
| 1967 | 64.9 mm (2.6 in) |
| 1968 | 51.0 mm (2.0 in) |
| 1969 | 39.5 mm (1.6 in) |
| 1970 | 67.1 mm (2.6 in) |
| 1971 | 31.5 mm (1.2 in) |
| 1972 | 71.2 mm (2.8 in) |
| 1973 | 48.5 mm (1.9 in) |
| 1974 | 50.5 mm (2.0 in) |
| 1975 | 26.2 mm (1.0 in) |
| 1976 | 25.4 mm (1.0 in) |
| 1977 | 43.3 mm (1.7 in) |
| 1978 | 63.7 mm (2.5 in) |
| 1979 | 57.6 mm (2.3 in) |
| 1980 | 48.8 mm (1.9 in) |
| 1981 | 39.9 mm (1.6 in) |
| 1982 | 56.6 mm (2.2 in) |
| 1983 | 31.6 mm (1.2 in) |
| 1984 | 42.1 mm (1.7 in) |
| 1985 | 49.8 mm (2.0 in) |
| 1986 | 53.4 mm (2.1 in) |
| 1987 | 59.3 mm (2.3 in) |
| 1988 | 51.0 mm (2.0 in) |
| 1989 | 35.7 mm (1.4 in) |
| 1990 | 43.1 mm (1.7 in) |
| 1991 | 57.6 mm (2.3 in) |
| 1992 | 110.8 mm (4.4 in) |
| 1993 | 68.4 mm (2.7 in) |
| 1994 | 44.3 mm (1.7 in) |
| 1995 | 37.6 mm (1.5 in) |
| 1996 | 103.0 mm (4.1 in) |
| 1997 | 39.3 mm (1.5 in) |
| 1998 | 39.4 mm (1.6 in) |
| 1999 | 77.7 mm (3.1 in) |
| 2000 | 48.4 mm (1.9 in) |
| 2001 | 55.2 mm (2.2 in) |
| 2002 | 36.5 mm (1.4 in) |
| 2003 | 52.8 mm (2.1 in) |
| 2004 | 45.2 mm (1.8 in) |
| 2005 | 104.5 mm (4.1 in) |
| 2006 | 75.9 mm (3.0 in) |
| 2007 | 56.2 mm (2.2 in) |
| 2008 | 53.4 mm (2.1 in) |
| 2009 | 71.1 mm (2.8 in) |
| 2010 | 38.2 mm (1.5 in) |
| 2011 | 78.9 mm (3.1 in) |
| 2012 | 80.0 mm (3.1 in) |
| 2013 | 74.8 mm (2.9 in) |
| 2014 | 61.6 mm (2.4 in) |
| 2015 | 43.7 mm (1.7 in) |
| 2016 | 76.1 mm (3.0 in) |
| 2017 | 42.5 mm (1.7 in) |
| 2018 | 26.5 mm (1.0 in) |
| 2019 | 73.0 mm (2.9 in) |
| 2020 | 66.3 mm (2.6 in) |
| 2021 | 53.3 mm (2.1 in) |
| 2022 | 43.8 mm (1.7 in) |
| 2023 | 143.2 mm (5.6 in) |
| 2024 | 54.0 mm (2.1 in) |
| 2025 | 38.1 mm (1.5 in) |
| 2026 | 41.1 mm (1.6 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1963 | 29 days |
| 1964 | 27 days |
| 1965 | 20 days |
| 1966 | 20 days |
| 1967 | 18 days |
| 1968 | 21 days |
| 1969 | 21 days |
| 1970 | 21 days |
| 1971 | 24 days |
| 1972 | 37 days |
| 1973 | 35 days |
| 1974 | 26 days |
| 1975 | 20 days |
| 1976 | 24 days |
| 1977 | 14 days |
| 1978 | 27 days |
| 1979 | 17 days |
| 1980 | 20 days |
| 1981 | 19 days |
| 1982 | 24 days |
| 1983 | 32 days |
| 1984 | 17 days |
| 1985 | 17 days |
| 1986 | 23 days |
| 1987 | 28 days |
| 1988 | 16 days |
| 1989 | 26 days |
| 1990 | 26 days |
| 1991 | 17 days |
| 1992 | 20 days |
| 1993 | 28 days |
| 1994 | 25 days |
| 1995 | 15 days |
| 1996 | 55 days |
| 1997 | 25 days |
| 1998 | 21 days |
| 1999 | 21 days |
| 2000 | 24 days |
| 2001 | 17 days |
| 2002 | 26 days |
| 2003 | 32 days |
| 2004 | 25 days |
| 2005 | 30 days |
| 2006 | 48 days |
| 2007 | 29 days |
| 2008 | 31 days |
| 2009 | 25 days |
| 2010 | 22 days |
| 2011 | 29 days |
| 2012 | 10 days |
| 2013 | 25 days |
| 2014 | 17 days |
| 2015 | 29 days |
| 2016 | 24 days |
| 2017 | 15 days |
| 2018 | 32 days |
| 2019 | 21 days |
| 2020 | 21 days |
| 2021 | 19 days |
| 2022 | 27 days |
| 2023 | 35 days |
| 2024 | 22 days |
| 2025 | 15 days |
| 2026 | 27 days |
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
63 years with a frostAcross 63 years with a frost, the median last spring frost at Hanko Tvarminne falls on 3 May and the median first autumn frost on 19 October, which leaves a median of 173 days between them.
In 1996 to 2025 the median growing season was 176 days. That is 10 days more than in 1963 to 1992.
Fitted over all years, the growing season changes by +3.4 days per decade at this station.
| Measure | Median, all years | Earliest period (1963 to 1992) | Recent period (1996 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 3 May | 4 May | 2 May | 2 days earlier | -1.4 days per decade |
| First autumn frost | 19 October | 17 October | 23 October | 6 days later | +2.0 days per decade |
| Growing days | 173 days | 166 days | 176 days | 10 days more | +3.4 days per decade |
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
63 years, 1963 to 2025A day with at least 28.5 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 74.0 mm (2.9 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 28.5 mm (1.1 in) | |
| 5 years | 38.4 mm (1.5 in) | |
| 10 years | 45.7 mm (1.8 in) | |
| 25 years | 56.1 mm (2.2 in) | |
| 50 years | 64.7 mm (2.5 in) | |
| 100 years | 74.0 mm (2.9 in) | Longer than the 63 years of record |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 63 years of values from 1963 to 2025.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 70.8 mm (2.8 in) in 1992; 65.9 mm (2.6 in) in 2023; 62.7 mm (2.5 in) in 1996.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Hanko Tvarminne had a mean temperature of 7.2 C (44.9 F) and 642.2 mm (25.3 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Liepaja (Latvia, 396 km away), Nordkoster A (Sweden, 701 km away) and Torslanda (Sweden, 701 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Liepaja | Latvia | 396 km (246 mi) | 6.8 C (44.3 F) | 678.5 mm (26.7 in) | 0.80 |
| Nordkoster A | Sweden | 701 km (436 mi) | 7.5 C (45.6 F) | 736.9 mm (29.0 in) | 0.82 |
| Torslanda | Sweden | 701 km (436 mi) | 7.3 C (45.2 F) | 689.8 mm (27.2 in) | 0.83 |
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-12).