Jomala Maarianhaminan Lentoase Weather Records (FIE00141805)
Record envelope, standing records and threshold days for Jomala Maarianhaminan Lentoase (FIE00141805), Finland, with 68 years of record.
Key Facts for Jomala Maarianhaminan Lentoase
- Jomala Maarianhaminan Lentoase (FIE00141805) is a weather station in Finland at 60.12 latitude and 19.91 longitude, 5 m (16 ft) above sea level.
- The station reports from 1959 to 2026, 68 years of record.
- 1,464 records set at Jomala Maarianhaminan Lentoase still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Jomala Maarianhaminan Lentoase set a daily record high maximum temperature of 23.6 C (74.5 F) on 26 August 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Finland, 60.12 latitude, 19.91 longitude.
- Elevation: 5 m (16 ft).
- Period of record: 1959 to 2026, 68 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 | 10.9 C (51.6 F) | -32.3 C (-26.1 F) | 4.1 C (39.4 F) | -21.4 C (-6.5 F) |
| Feb | 10.4 C (50.7 F) | -32.9 C (-27.2 F) | 6.0 C (42.8 F) | -21.8 C (-7.2 F) |
| Mar | 17.0 C (62.6 F) | -25.0 C (-13.0 F) | 9.4 C (48.9 F) | -4.6 C (23.7 F) |
| Apr | 21.1 C (70.0 F) | -18.9 C (-2.0 F) | 15.9 C (60.6 F) | -4.9 C (23.2 F) |
| May | 27.1 C (80.8 F) | -6.5 C (20.3 F) | 21.0 C (69.8 F) | -3.9 C (25.0 F) |
| Jun | 29.4 C (84.9 F) | -2.2 C (28.0 F) | 24.5 C (76.1 F) | 5.6 C (42.1 F) |
| Jul | 31.0 C (87.8 F) | 1.2 C (34.2 F) | 25.6 C (78.1 F) | 4.6 C (40.3 F) |
| Aug | 30.7 C (87.3 F) | 0.5 C (32.9 F) | 25.0 C (77.0 F) | 3.6 C (38.5 F) |
| Sep | 25.7 C (78.3 F) | -6.7 C (19.9 F) | n/a | n/a |
| Oct | 19.0 C (66.2 F) | -11.8 C (10.8 F) | n/a | n/a |
| Nov | 16.6 C (61.9 F) | -20.0 C (-4.0 F) | n/a | n/a |
| Dec | 11.1 C (52.0 F) | -28.9 C (-20.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1959 | 27 |
| 1960 | 12 |
| 1961 | 22 |
| 1962 | 13 |
| 1963 | 25 |
| 1964 | 16 |
| 1965 | 33 |
| 1966 | 51 |
| 1967 | 15 |
| 1968 | 29 |
| 1969 | 21 |
| 1970 | 19 |
| 1971 | 22 |
| 1972 | 10 |
| 1973 | 26 |
| 1974 | 9 |
| 1975 | 21 |
| 1976 | 18 |
| 1977 | 32 |
| 1978 | 40 |
| 1979 | 23 |
| 1980 | 18 |
| 1981 | 20 |
| 1982 | 15 |
| 1983 | 10 |
| 1984 | 13 |
| 1985 | 30 |
| 1986 | 17 |
| 1987 | 38 |
| 1988 | 18 |
| 1989 | 30 |
| 1990 | 24 |
| 1991 | 11 |
| 1992 | 20 |
| 1993 | 16 |
| 1994 | 11 |
| 1995 | 10 |
| 1999 | 7 |
| 2000 | 20 |
| 2001 | 11 |
| 2002 | 41 |
| 2003 | 32 |
| 2004 | 13 |
| 2005 | 8 |
| 2006 | 38 |
| 2007 | 16 |
| 2008 | 19 |
| 2009 | 10 |
| 2010 | 28 |
| 2011 | 21 |
| 2012 | 16 |
| 2013 | 16 |
| 2014 | 32 |
| 2015 | 37 |
| 2016 | 17 |
| 2017 | 14 |
| 2018 | 33 |
| 2019 | 34 |
| 2020 | 60 |
| 2021 | 30 |
| 2022 | 27 |
| 2023 | 20 |
| 2024 | 28 |
| 2025 | 46 |
| 2026 | 5 |
All-Time Record Progression
7 new records| Date | Kind | Detail |
|---|---|---|
| 2001-07-10 | Record high minimum temperature | Record high minimum temperature 19.9 C (67.8 F) |
| 2003-07-28 | Record high minimum temperature | Record high minimum temperature 20.0 C (68.0 F) |
| 2011-07-23 | Record high minimum temperature | Record high minimum temperature 20.6 C (69.1 F) |
| 2014-08-04 | Record high minimum temperature | Record high minimum temperature 22.0 C (71.6 F) |
| 2018-07-17 | Record high maximum temperature | Record high maximum temperature 30.8 C (87.4 F) |
| 2018-07-29 | Record high minimum temperature | Record high minimum temperature 22.6 C (72.7 F) |
| 2019-07-28 | Record high maximum temperature | Record high maximum temperature 31.0 C (87.8 F) |
Wettest Day of Each Month
Jul: 63.7 mm (2.5 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 25.6 mm (1.0 in) | 18 January 1983 |
| Feb | 30.4 mm (1.2 in) | 16 February 1962 |
| Mar | 24.9 mm (1.0 in) | 21 March 1974 |
| Apr | 33.1 mm (1.3 in) | 23 April 1968 |
| May | 31.2 mm (1.2 in) | 28 May 1960 |
| Jun | 29.8 mm (1.2 in) | 3 June 1994 |
| Jul | 63.7 mm (2.5 in) | 21 July 1961 |
| Aug | 51.2 mm (2.0 in) | 2 August 1988 |
| Sep | 54.1 mm (2.1 in) | 6 September 1963 |
| Oct | 30.2 mm (1.2 in) | 20 October 1974 |
| Nov | 28.4 mm (1.1 in) | 7 November 1984 |
| Dec | 19.4 mm (0.8 in) | 13 December 1964 |
Period of Record Coverage
1959 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 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 | 364 | 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 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 353 | 97% | Yes |
| 1987 | 362 | 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 | 273 | 75% | No |
| 1999 | 115 | 32% | No |
| 2000 | 359 | 98% | Yes |
| 2001 | 346 | 95% | Yes |
| 2002 | 345 | 95% | Yes |
| 2003 | 345 | 95% | Yes |
| 2004 | 347 | 95% | Yes |
| 2005 | 238 | 65% | No |
| 2006 | 355 | 97% | Yes |
| 2007 | 352 | 96% | Yes |
| 2008 | 354 | 97% | Yes |
| 2009 | 339 | 93% | Yes |
| 2010 | 363 | 99% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 364 | 99% | Yes |
| 2017 | 358 | 98% | Yes |
| 2018 | 336 | 92% | 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 |
|---|---|---|---|---|---|---|
| 26 August 2026 | Jomala Maarianhaminan Lentoase, FI | daily high max (Provisional) | 23.6 C (74.5 F) | 0.3 C (0.5 F) | 20 years | 13 of 100 (Routine) |
| 8 May 2026 | Jomala Maarianhaminan Lentoase, FI | daily low min | -3.9 C (25.0 F) | 0.2 C (0.4 F) | 4 years | 7 of 100 (Routine) |
| 7 May 2026 | Jomala Maarianhaminan Lentoase, FI | daily low min (Tie) | -3.9 C (25.0 F) | tie | 60 years | 6 of 100 (Routine) |
| 29 April 2026 | Jomala Maarianhaminan Lentoase, FI | daily low min (Tie) | -4.6 C (23.7 F) | tie | 64 years | 6 of 100 (Routine) |
| 17 April 2026 | Jomala Maarianhaminan Lentoase, FI | daily high min | 5.5 C (41.9 F) | 1.0 C (1.8 F) | 59 years | 26 of 100 (Routine) |
| 17 April 2026 | Jomala Maarianhaminan Lentoase, FI | daily high max | 15.9 C (60.6 F) | 0.8 C (1.4 F) | 4 years | 9 of 100 (Routine) |
| 2 April 2026 | Jomala Maarianhaminan Lentoase, FI | daily high min | 3.6 C (38.5 F) | 0.8 C (1.4 F) | 19 years | 13 of 100 (Routine) |
| 13 March 2026 | Jomala Maarianhaminan Lentoase, FI | daily high min | 2.7 C (36.9 F) | 0.2 C (0.4 F) | 19 years | 11 of 100 (Routine) |
| 20 December 2025 | Jomala Maarianhaminan Lentoase, FI | daily high min | 5.9 C (42.6 F) | 0.7 C (1.3 F) | 4 years | 8 of 100 (Routine) |
| 19 December 2025 | Jomala Maarianhaminan Lentoase, FI | daily high min | 5.1 C (41.2 F) | 1.2 C (2.2 F) | 16 years | 13 of 100 (Routine) |
| 17 December 2025 | Jomala Maarianhaminan Lentoase, FI | daily high min | 4.2 C (39.6 F) | 0.7 C (1.3 F) | 20 years | 13 of 100 (Routine) |
| 17 December 2025 | Jomala Maarianhaminan Lentoase, FI | daily high max | 7.4 C (45.3 F) | 0.1 C (0.2 F) | 12 years | 9 of 100 (Routine) |
| 16 December 2025 | Jomala Maarianhaminan Lentoase, FI | daily high max | 8.3 C (46.9 F) | 1.6 C (2.9 F) | 4 years | 11 of 100 (Routine) |
| 16 December 2025 | Jomala Maarianhaminan Lentoase, FI | daily high min | 5.3 C (41.5 F) | 1.0 C (1.8 F) | 4 years | 8 of 100 (Routine) |
| 10 December 2025 | Jomala Maarianhaminan Lentoase, FI | daily high max | 8.9 C (48.0 F) | 0.4 C (0.7 F) | 60 years | 25 of 100 (Routine) |
| 8 December 2025 | Jomala Maarianhaminan Lentoase, FI | daily high min | 5.9 C (42.6 F) | 0.4 C (0.7 F) | 19 years | 11 of 100 (Routine) |
| 8 December 2025 | Jomala Maarianhaminan Lentoase, FI | daily high max (Tie) | 7.5 C (45.5 F) | tie | 40 years | 4 of 100 (Routine) |
| 3 December 2025 | Jomala Maarianhaminan Lentoase, FI | daily high min | 5.3 C (41.5 F) | 0.2 C (0.4 F) | 19 years | 11 of 100 (Routine) |
| 2 December 2025 | Jomala Maarianhaminan Lentoase, FI | daily high min (Tie) | 5.1 C (41.2 F) | tie | 64 years | 6 of 100 (Routine) |
| 1 December 2025 | Jomala Maarianhaminan Lentoase, FI | daily high min (Tie) | 5.4 C (41.7 F) | tie | 19 years | 2 of 100 (Routine) |
Climate Trend
58 complete years, 1959 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1959 | 5.6 C | -0.01 C |
| 1960 | 5.1 C | -0.57 C |
| 1961 | 6.4 C | +0.77 C |
| 1962 | 4.2 C | -1.40 C |
| 1963 | 4.0 C | -1.65 C |
| 1964 | 4.8 C | -0.82 C |
| 1965 | 4.3 C | -1.31 C |
| 1966 | 3.5 C | -2.14 C |
| 1967 | 5.4 C | -0.22 C |
| 1968 | 4.6 C | -1.01 C |
| 1969 | 4.1 C | -1.50 C |
| 1970 | 3.7 C | -1.91 C |
| 1971 | 4.9 C | -0.78 C |
| 1972 | 6.0 C | +0.31 C |
| 1973 | 5.6 C | -0.09 C |
| 1974 | 6.3 C | +0.70 C |
| 1975 | 6.7 C | +1.01 C |
| 1976 | 4.3 C | -1.36 C |
| 1977 | 4.9 C | -0.78 C |
| 1978 | 4.0 C | -1.64 C |
| 1979 | 4.2 C | -1.45 C |
| 1980 | 4.6 C | -1.09 C |
| 1981 | 4.8 C | -0.83 C |
| 1982 | 5.2 C | -0.43 C |
| 1983 | 5.7 C | +0.04 C |
| 1984 | 5.9 C | +0.23 C |
| 1985 | 3.0 C | -2.68 C |
| 1986 | 4.3 C | -1.31 C |
| 1987 | 3.3 C | -2.31 C |
| 1988 | 5.7 C | +0.09 C |
| 1989 | 6.7 C | +1.03 C |
| 1990 | 6.8 C | +1.14 C |
| 1991 | 6.0 C | +0.39 C |
| 1992 | 6.3 C | +0.62 C |
| 1993 | 5.7 C | +0.01 C |
| 1994 | 5.5 C | -0.10 C |
| 2000 | 6.7 C | +1.02 C |
| 2001 | 5.9 C | +0.22 C |
| 2002 | 6.1 C | +0.43 C |
| 2004 | 6.0 C | +0.36 C |
| 2006 | 6.4 C | +0.76 C |
| 2007 | 6.5 C | +0.81 C |
| 2008 | 6.9 C | +1.21 C |
| 2010 | 4.2 C | -1.40 C |
| 2011 | 6.6 C | +0.91 C |
| 2012 | 5.6 C | -0.08 C |
| 2013 | 6.2 C | +0.60 C |
| 2014 | 7.3 C | +1.63 C |
| 2015 | 7.5 C | +1.89 C |
| 2016 | 6.6 C | +0.95 C |
| 2017 | 6.4 C | +0.71 C |
| 2019 | 7.2 C | +1.55 C |
| 2020 | 8.3 C | +2.67 C |
| 2021 | 6.6 C | +0.98 C |
| 2022 | 7.1 C | +1.46 C |
| 2023 | 6.4 C | +0.76 C |
| 2024 | 7.2 C | +1.57 C |
| 2025 | 7.6 C | +1.99 C |
The annual mean temperature here has risen by 0.4 C (0.3 to 0.5) per decade over 1959 to 2025. In Fahrenheit: 0.7 F (0.5 to 0.9) per decade. The slope is a straight line fitted to 58 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.4 C (0.3 to 0.5) per decade | 0.7 F (0.5 to 0.9) per decade | 1959 to 2025 | 58 | Rise |
| Mean daily maximum | 0.4 C (0.2 to 0.5) per decade | 0.6 F (0.4 to 0.8) per decade | 1959 to 2025 | 58 | Rise |
| Mean daily minimum | 0.4 C (0.3 to 0.6) per decade | 0.8 F (0.5 to 1.0) per decade | 1959 to 2025 | 58 | 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
1959 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 31.0 C (87.8 F) | 2019 | 26.7 C (80.1 F) | 65 |
| Coldest night (TNn) | -32.9 C (-27.2 F) | 1979 | -21.5 C (-6.7 F) | 65 |
| Wettest day (Rx1day) | 63.7 mm (2.5 in) | 1961 | 28.2 mm (1.1 in) | 42 |
| Wettest five days (Rx5day) | 89.1 mm (3.5 in) | 1992 | 50.1 mm (2.0 in) | 37 |
| Longest dry spell (CDD) | 41 days | 1964 | 24 days | 41 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1959 | 27.4 C (81.3 F) |
| 1960 | 26.1 C (79.0 F) |
| 1961 | 26.7 C (80.1 F) |
| 1962 | 21.6 C (70.9 F) |
| 1963 | 25.0 C (77.0 F) |
| 1964 | 25.8 C (78.4 F) |
| 1965 | 23.5 C (74.3 F) |
| 1966 | 27.4 C (81.3 F) |
| 1967 | 25.7 C (78.3 F) |
| 1968 | 26.3 C (79.3 F) |
| 1969 | 28.9 C (84.0 F) |
| 1970 | 26.6 C (79.9 F) |
| 1971 | 24.9 C (76.8 F) |
| 1972 | 29.4 C (84.9 F) |
| 1973 | 29.2 C (84.6 F) |
| 1974 | 24.4 C (75.9 F) |
| 1975 | 30.7 C (87.3 F) |
| 1976 | 25.6 C (78.1 F) |
| 1977 | 28.8 C (83.8 F) |
| 1978 | 24.6 C (76.3 F) |
| 1979 | 24.6 C (76.3 F) |
| 1980 | 27.2 C (81.0 F) |
| 1981 | 22.9 C (73.2 F) |
| 1982 | 28.4 C (83.1 F) |
| 1983 | 29.9 C (85.8 F) |
| 1984 | 25.9 C (78.6 F) |
| 1985 | 25.8 C (78.4 F) |
| 1986 | 26.2 C (79.2 F) |
| 1987 | 24.8 C (76.6 F) |
| 1988 | 29.3 C (84.7 F) |
| 1989 | 28.3 C (82.9 F) |
| 1990 | 25.3 C (77.5 F) |
| 1991 | 26.7 C (80.1 F) |
| 1992 | 25.5 C (77.9 F) |
| 1993 | 25.3 C (77.5 F) |
| 1994 | 28.0 C (82.4 F) |
| 1995 | 27.6 C (81.7 F) |
| 1997 | n/a |
| 1998 | n/a |
| 1999 | 22.3 C (72.1 F) |
| 2000 | 23.3 C (73.9 F) |
| 2001 | 27.1 C (80.8 F) |
| 2002 | 27.9 C (82.2 F) |
| 2003 | 29.3 C (84.7 F) |
| 2004 | 28.1 C (82.6 F) |
| 2005 | 25.0 C (77.0 F) |
| 2006 | 27.8 C (82.0 F) |
| 2007 | 26.8 C (80.2 F) |
| 2008 | 26.5 C (79.7 F) |
| 2009 | 27.0 C (80.6 F) |
| 2010 | 28.7 C (83.7 F) |
| 2011 | 27.4 C (81.3 F) |
| 2012 | 24.3 C (75.7 F) |
| 2013 | 26.9 C (80.4 F) |
| 2014 | 29.5 C (85.1 F) |
| 2015 | 25.6 C (78.1 F) |
| 2016 | 24.9 C (76.8 F) |
| 2017 | 23.0 C (73.4 F) |
| 2018 | 30.8 C (87.4 F) |
| 2019 | 31.0 C (87.8 F) |
| 2020 | 28.3 C (82.9 F) |
| 2021 | 29.2 C (84.6 F) |
| 2022 | 27.7 C (81.9 F) |
| 2023 | 26.5 C (79.7 F) |
| 2024 | 27.2 C (81.0 F) |
| 2025 | 28.7 C (83.7 F) |
| 2026 | 25.6 C (78.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1959 | -18.7 C (-1.7 F) |
| 1960 | -22.6 C (-8.7 F) |
| 1961 | -18.1 C (-0.6 F) |
| 1962 | -21.9 C (-7.4 F) |
| 1963 | -26.6 C (-15.9 F) |
| 1964 | -24.6 C (-12.3 F) |
| 1965 | -22.3 C (-8.1 F) |
| 1966 | -32.6 C (-26.7 F) |
| 1967 | -25.8 C (-14.4 F) |
| 1968 | -25.1 C (-13.2 F) |
| 1969 | -22.3 C (-8.1 F) |
| 1970 | -32.5 C (-26.5 F) |
| 1971 | -21.4 C (-6.5 F) |
| 1972 | -17.7 C (0.1 F) |
| 1973 | -23.6 C (-10.5 F) |
| 1974 | -13.2 C (8.2 F) |
| 1975 | -15.5 C (4.1 F) |
| 1976 | -19.6 C (-3.3 F) |
| 1977 | -24.4 C (-11.9 F) |
| 1978 | -28.9 C (-20.0 F) |
| 1979 | -32.9 C (-27.2 F) |
| 1980 | -26.3 C (-15.3 F) |
| 1981 | -22.6 C (-8.7 F) |
| 1982 | -23.9 C (-11.0 F) |
| 1983 | -17.2 C (1.0 F) |
| 1984 | -17.8 C (0.0 F) |
| 1985 | -29.7 C (-21.5 F) |
| 1986 | -25.0 C (-13.0 F) |
| 1987 | -32.3 C (-26.1 F) |
| 1988 | -19.4 C (-2.9 F) |
| 1989 | -24.4 C (-11.9 F) |
| 1990 | -13.9 C (7.0 F) |
| 1991 | -15.6 C (3.9 F) |
| 1992 | -12.9 C (8.8 F) |
| 1993 | -16.5 C (2.3 F) |
| 1994 | -23.0 C (-9.4 F) |
| 1995 | -13.0 C (8.6 F) |
| 1997 | n/a |
| 1998 | n/a |
| 1999 | -11.1 C (12.0 F) |
| 2000 | -19.6 C (-3.3 F) |
| 2001 | -21.1 C (-6.0 F) |
| 2002 | -24.3 C (-11.7 F) |
| 2003 | -28.5 C (-19.3 F) |
| 2004 | -18.0 C (-0.4 F) |
| 2005 | -21.4 C (-6.5 F) |
| 2006 | -21.4 C (-6.5 F) |
| 2007 | -25.2 C (-13.4 F) |
| 2008 | -16.5 C (2.3 F) |
| 2009 | -15.0 C (5.0 F) |
| 2010 | -23.8 C (-10.8 F) |
| 2011 | -28.1 C (-18.6 F) |
| 2012 | -22.0 C (-7.6 F) |
| 2013 | -25.1 C (-13.2 F) |
| 2014 | -16.6 C (2.1 F) |
| 2015 | -8.9 C (16.0 F) |
| 2016 | -22.6 C (-8.7 F) |
| 2017 | -17.5 C (0.5 F) |
| 2018 | -18.6 C (-1.5 F) |
| 2019 | -17.1 C (1.2 F) |
| 2020 | -11.7 C (10.9 F) |
| 2021 | -22.1 C (-7.8 F) |
| 2022 | -18.1 C (-0.6 F) |
| 2023 | -19.4 C (-2.9 F) |
| 2024 | -21.5 C (-6.7 F) |
| 2025 | -15.3 C (4.5 F) |
| 2026 | -21.8 C (-7.2 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1959 | 21.8 mm (0.9 in) |
| 1960 | 37.6 mm (1.5 in) |
| 1961 | 63.7 mm (2.5 in) |
| 1962 | 30.4 mm (1.2 in) |
| 1963 | 54.1 mm (2.1 in) |
| 1964 | 19.4 mm (0.8 in) |
| 1965 | 31.9 mm (1.3 in) |
| 1966 | 20.5 mm (0.8 in) |
| 1967 | 28.0 mm (1.1 in) |
| 1968 | 33.1 mm (1.3 in) |
| 1969 | 26.3 mm (1.0 in) |
| 1970 | 16.1 mm (0.6 in) |
| 1971 | 17.6 mm (0.7 in) |
| 1972 | 23.7 mm (0.9 in) |
| 1973 | 31.7 mm (1.2 in) |
| 1974 | 36.2 mm (1.4 in) |
| 1975 | 28.4 mm (1.1 in) |
| 1976 | 16.0 mm (0.6 in) |
| 1977 | 37.6 mm (1.5 in) |
| 1978 | 23.0 mm (0.9 in) |
| 1979 | 26.0 mm (1.0 in) |
| 1980 | 32.6 mm (1.3 in) |
| 1981 | 26.9 mm (1.1 in) |
| 1982 | 24.5 mm (1.0 in) |
| 1983 | 27.1 mm (1.1 in) |
| 1984 | 38.9 mm (1.5 in) |
| 1985 | 17.5 mm (0.7 in) |
| 1986 | 23.8 mm (0.9 in) |
| 1987 | 43.6 mm (1.7 in) |
| 1988 | 51.2 mm (2.0 in) |
| 1989 | 43.8 mm (1.7 in) |
| 1990 | 31.3 mm (1.2 in) |
| 1991 | 45.0 mm (1.8 in) |
| 1992 | 62.1 mm (2.4 in) |
| 1993 | 30.7 mm (1.2 in) |
| 1994 | 29.8 mm (1.2 in) |
| 1995 | 18.5 mm (0.7 in) |
| 1997 | 0.1 mm (0.00 in) |
| 1998 | 8.0 mm (0.31 in) |
| 1999 | 5.2 mm (0.20 in) |
| 2000 | 50.0 mm (2.0 in) |
| 2001 | n/a |
| 2002 | n/a |
| 2003 | n/a |
| 2004 | 0.6 mm (0.02 in) |
| 2005 | n/a |
| 2006 | n/a |
| 2007 | n/a |
| 2008 | n/a |
| 2009 | n/a |
| 2010 | n/a |
| 2011 | n/a |
| 2012 | n/a |
| 2013 | n/a |
| 2014 | n/a |
| 2015 | n/a |
| 2016 | n/a |
| 2017 | n/a |
| 2018 | n/a |
| 2019 | n/a |
| 2020 | n/a |
| 2021 | n/a |
| 2022 | n/a |
| 2023 | n/a |
| 2024 | n/a |
| 2025 | n/a |
| 2026 | n/a |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1959 | 38.0 mm (1.5 in) |
| 1960 | 85.4 mm (3.4 in) |
| 1961 | 70.0 mm (2.8 in) |
| 1962 | 69.4 mm (2.7 in) |
| 1963 | 68.3 mm (2.7 in) |
| 1964 | 38.1 mm (1.5 in) |
| 1965 | 53.8 mm (2.1 in) |
| 1966 | 47.5 mm (1.9 in) |
| 1967 | 52.4 mm (2.1 in) |
| 1968 | 50.1 mm (2.0 in) |
| 1969 | 74.0 mm (2.9 in) |
| 1970 | 28.3 mm (1.1 in) |
| 1971 | 43.4 mm (1.7 in) |
| 1972 | 58.5 mm (2.3 in) |
| 1973 | 43.4 mm (1.7 in) |
| 1974 | 50.5 mm (2.0 in) |
| 1975 | 45.2 mm (1.8 in) |
| 1976 | 36.3 mm (1.4 in) |
| 1977 | 66.8 mm (2.6 in) |
| 1978 | 36.1 mm (1.4 in) |
| 1979 | 54.1 mm (2.1 in) |
| 1980 | 55.8 mm (2.2 in) |
| 1981 | 39.7 mm (1.6 in) |
| 1982 | 48.9 mm (1.9 in) |
| 1983 | 37.5 mm (1.5 in) |
| 1984 | 58.7 mm (2.3 in) |
| 1985 | 35.5 mm (1.4 in) |
| 1986 | 44.5 mm (1.8 in) |
| 1987 | 64.1 mm (2.5 in) |
| 1988 | 73.4 mm (2.9 in) |
| 1989 | 66.8 mm (2.6 in) |
| 1990 | 49.5 mm (1.9 in) |
| 1991 | 58.1 mm (2.3 in) |
| 1992 | 89.1 mm (3.5 in) |
| 1993 | 46.9 mm (1.8 in) |
| 1994 | 43.8 mm (1.7 in) |
| 1995 | 29.8 mm (1.2 in) |
| 1997 | n/a |
| 1998 | n/a |
| 1999 | n/a |
| 2000 | n/a |
| 2001 | n/a |
| 2002 | n/a |
| 2003 | n/a |
| 2004 | n/a |
| 2005 | n/a |
| 2006 | n/a |
| 2007 | n/a |
| 2008 | n/a |
| 2009 | n/a |
| 2010 | n/a |
| 2011 | n/a |
| 2012 | n/a |
| 2013 | n/a |
| 2014 | n/a |
| 2015 | n/a |
| 2016 | n/a |
| 2017 | n/a |
| 2018 | n/a |
| 2019 | n/a |
| 2020 | n/a |
| 2021 | n/a |
| 2022 | n/a |
| 2023 | n/a |
| 2024 | n/a |
| 2025 | n/a |
| 2026 | n/a |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1959 | 24 days |
| 1960 | 38 days |
| 1961 | 23 days |
| 1962 | 20 days |
| 1963 | 23 days |
| 1964 | 41 days |
| 1965 | 20 days |
| 1966 | 19 days |
| 1967 | 20 days |
| 1968 | 33 days |
| 1969 | 26 days |
| 1970 | 23 days |
| 1971 | 18 days |
| 1972 | 30 days |
| 1973 | 18 days |
| 1974 | 22 days |
| 1975 | 24 days |
| 1976 | 24 days |
| 1977 | 17 days |
| 1978 | 21 days |
| 1979 | 26 days |
| 1980 | 31 days |
| 1981 | 36 days |
| 1982 | 30 days |
| 1983 | 32 days |
| 1984 | 21 days |
| 1985 | 28 days |
| 1986 | 28 days |
| 1987 | 35 days |
| 1988 | 24 days |
| 1989 | 22 days |
| 1990 | 29 days |
| 1991 | 22 days |
| 1992 | 30 days |
| 1993 | 25 days |
| 1994 | 25 days |
| 1995 | 20 days |
| 1997 | 1 day |
| 1998 | n/a |
| 1999 | 2 days |
| 2000 | 2 days |
| 2001 | n/a |
| 2002 | n/a |
| 2003 | n/a |
| 2004 | 1 day |
| 2005 | n/a |
| 2006 | n/a |
| 2007 | n/a |
| 2008 | n/a |
| 2009 | n/a |
| 2010 | n/a |
| 2011 | n/a |
| 2012 | n/a |
| 2013 | n/a |
| 2014 | n/a |
| 2015 | n/a |
| 2016 | n/a |
| 2017 | n/a |
| 2018 | n/a |
| 2019 | n/a |
| 2020 | n/a |
| 2021 | n/a |
| 2022 | n/a |
| 2023 | n/a |
| 2024 | n/a |
| 2025 | n/a |
| 2026 | n/a |
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
58 years with a frostAcross 58 years with a frost, the median last spring frost at Jomala Maarianhaminan Lentoase falls on 22 May and the median first autumn frost on 30 September, which leaves a median of 132 days between them.
Fitted over all years, the growing season changes by +2.4 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1987 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 22 May | n/a | 20 May | n/a | -1.2 days per decade |
| First autumn frost | 30 September | n/a | 3 October | n/a | +1.2 days per decade |
| Growing days | 132 days | n/a | 134 days | n/a | +2.4 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
36 years, 1959 to 1994A day with at least 29.5 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 75.0 mm (3.0 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 29.5 mm (1.2 in) | |
| 5 years | 40.2 mm (1.6 in) | |
| 10 years | 47.9 mm (1.9 in) | |
| 25 years | 58.3 mm (2.3 in) | |
| 50 years | 66.4 mm (2.6 in) | Longer than the 36 years of record |
| 100 years | 75.0 mm (3.0 in) | Longer than the 36 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, 36 years of values from 1959 to 1994.
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: 63.7 mm (2.5 in) in 1961; 62.1 mm (2.4 in) in 1992; 54.1 mm (2.1 in) in 1963.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
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). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-17).