Helsinki Kaisaniemi AWS Weather Records (FI000000304)
Record envelope, standing records and threshold days for Helsinki Kaisaniemi AWS (FI000000304), Finland, with 76 years of record.
Key Facts for Helsinki Kaisaniemi AWS
- Helsinki Kaisaniemi AWS (FI000000304) is a weather station in Finland at 60.17 latitude and 24.95 longitude, 4 m (13 ft) above sea level.
- The station reports from 1951 to 2026, 76 years of record.
- 1,464 records set at Helsinki Kaisaniemi AWS still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Helsinki Kaisaniemi AWS set a daily record high maximum temperature of 16.5 C (61.7 F) on 17 April 2026.
About the Station
- Location: Finland, 60.17 latitude, 24.95 longitude.
- Elevation: 4 m (13 ft).
- Period of record: 1951 to 2026, 76 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 | 8.5 C (47.3 F) | -34.3 C (-29.7 F) | 0.4 C (32.7 F) | -18.7 C (-1.7 F) |
| Feb | 10.2 C (50.4 F) | -31.5 C (-24.7 F) | 3.6 C (38.5 F) | -20.2 C (-4.4 F) |
| Mar | 15.1 C (59.2 F) | -22.1 C (-7.8 F) | 10.3 C (50.5 F) | -2.1 C (28.2 F) |
| Apr | 21.9 C (71.4 F) | -13.5 C (7.7 F) | 16.5 C (61.7 F) | -1.9 C (28.6 F) |
| May | 27.6 C (81.7 F) | -3.1 C (26.4 F) | 23.3 C (73.9 F) | 2.8 C (37.0 F) |
| Jun | 30.5 C (86.9 F) | 1.0 C (33.8 F) | 27.5 C (81.5 F) | 8.1 C (46.6 F) |
| Jul | 33.2 C (91.8 F) | 7.0 C (44.6 F) | 28.7 C (83.7 F) | 9.5 C (49.1 F) |
| Aug | 31.2 C (88.2 F) | 2.8 C (37.0 F) | 23.1 C (73.6 F) | 9.3 C (48.7 F) |
| Sep | 26.2 C (79.2 F) | -4.5 C (23.9 F) | n/a | n/a |
| Oct | 17.5 C (63.5 F) | -11.6 C (11.1 F) | n/a | n/a |
| Nov | 14.3 C (57.7 F) | -18.6 C (-1.5 F) | n/a | n/a |
| Dec | 10.5 C (50.9 F) | -29.5 C (-21.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1951 | 14 |
| 1952 | 9 |
| 1953 | 16 |
| 1954 | 4 |
| 1955 | 30 |
| 1956 | 39 |
| 1957 | 11 |
| 1958 | 17 |
| 1959 | 15 |
| 1960 | 5 |
| 1961 | 17 |
| 1962 | 23 |
| 1963 | 24 |
| 1964 | 4 |
| 1965 | 34 |
| 1966 | 26 |
| 1967 | 12 |
| 1968 | 28 |
| 1969 | 17 |
| 1970 | 10 |
| 1971 | 18 |
| 1972 | 14 |
| 1973 | 34 |
| 1974 | 8 |
| 1975 | 24 |
| 1976 | 22 |
| 1977 | 25 |
| 1978 | 33 |
| 1979 | 13 |
| 1980 | 13 |
| 1981 | 20 |
| 1982 | 17 |
| 1983 | 15 |
| 1984 | 7 |
| 1985 | 15 |
| 1986 | 13 |
| 1987 | 34 |
| 1988 | 20 |
| 1989 | 18 |
| 1990 | 24 |
| 1991 | 9 |
| 1992 | 23 |
| 1993 | 17 |
| 1994 | 11 |
| 1995 | 10 |
| 1996 | 14 |
| 1997 | 10 |
| 1998 | 15 |
| 1999 | 19 |
| 2000 | 16 |
| 2001 | 11 |
| 2002 | 27 |
| 2003 | 21 |
| 2004 | 9 |
| 2005 | 10 |
| 2006 | 33 |
| 2007 | 24 |
| 2008 | 13 |
| 2009 | 9 |
| 2010 | 23 |
| 2011 | 25 |
| 2012 | 9 |
| 2013 | 11 |
| 2014 | 23 |
| 2015 | 33 |
| 2016 | 5 |
| 2017 | 9 |
| 2018 | 36 |
| 2019 | 26 |
| 2020 | 51 |
| 2021 | 29 |
| 2022 | 31 |
| 2023 | 18 |
| 2024 | 40 |
| 2025 | 44 |
| 2026 | 8 |
All-Time Record Progression
9 new records| Date | Kind | Detail |
|---|---|---|
| 1987-01-06 | Record low maximum temperature | Record low maximum temperature -24.7 C (-12.5 F) |
| 1987-01-09 | Record low minimum temperature | Record low minimum temperature -34.0 C (-29.2 F) |
| 1987-01-10 | Record low minimum temperature | Record low minimum temperature -34.3 C (-29.7 F) |
| 1987-01-12 | Record low maximum temperature | Record low maximum temperature -28.1 C (-18.6 F) |
| 1988-07-03 | Record high minimum temperature | Record high minimum temperature 21.9 C (71.4 F) |
| 1993-07-24 | Record daily precipitation | Record daily precipitation 79.3 mm (3.1 in) |
| 2003-07-29 | Record high minimum temperature | Record high minimum temperature 22.2 C (72.0 F) |
| 2018-07-29 | Record high minimum temperature | Record high minimum temperature 22.8 C (73.0 F) |
| 2019-07-28 | Record high maximum temperature | Record high maximum temperature 33.2 C (91.8 F) |
Wettest Day of Each Month
Jul: 79.3 mm (3.1 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 19.8 mm (0.8 in) | 12 January 2021 |
| Feb | 33.9 mm (1.3 in) | 16 February 2020 |
| Mar | 20.9 mm (0.8 in) | 30 March 1961 |
| Apr | 36.3 mm (1.4 in) | 27 April 2001 |
| May | 39.7 mm (1.6 in) | 26 May 2021 |
| Jun | 41.8 mm (1.6 in) | 16 June 2016 |
| Jul | 79.3 mm (3.1 in) | 24 July 1993 |
| Aug | 53.3 mm (2.1 in) | 24 August 1967 |
| Sep | 40.7 mm (1.6 in) | 12 September 1962 |
| Oct | 45.6 mm (1.8 in) | 13 October 1963 |
| Nov | 28.0 mm (1.1 in) | 20 November 2024 |
| Dec | 29.7 mm (1.2 in) | 12 December 2017 |
Period of Record Coverage
1951 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1951 | 364 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 363 | 99% | Yes |
| 1958 | 365 | 100% | Yes |
| 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 | 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 | 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 | 365 | 100% | 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 | 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 | 365 | 100% | Yes |
| 2006 | 365 | 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 | 364 | 100% | 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 |
|---|---|---|---|---|---|---|
| 17 April 2026 | Helsinki Kaisaniemi AWS, FI | daily high max | 16.5 C (61.7 F) | 1.4 C (2.5 F) | 15 years | 14 of 100 (Routine) |
| 17 April 2026 | Helsinki Kaisaniemi AWS, FI | daily high min | 8.9 C (48.0 F) | 1.7 C (3.1 F) | 0 years | 12 of 100 (Routine) |
| 15 March 2026 | Helsinki Kaisaniemi AWS, FI | daily high max | 8.8 C (47.8 F) | 0.6 C (1.1 F) | 72 years | 29 of 100 (Routine) |
| 15 March 2026 | Helsinki Kaisaniemi AWS, FI | daily high min | 3.9 C (39.0 F) | 1.2 C (2.2 F) | 1 year | 9 of 100 (Routine) |
| 14 March 2026 | Helsinki Kaisaniemi AWS, FI | daily high min | 4.0 C (39.2 F) | 2.3 C (4.1 F) | 12 years | 14 of 100 (Routine) |
| 7 March 2026 | Helsinki Kaisaniemi AWS, FI | daily high max | 8.3 C (46.9 F) | 0.8 C (1.4 F) | 28 years | 17 of 100 (Routine) |
| 5 March 2026 | Helsinki Kaisaniemi AWS, FI | daily high max | 8.0 C (46.4 F) | 1.2 C (2.2 F) | 0 years | 10 of 100 (Routine) |
| 4 March 2026 | Helsinki Kaisaniemi AWS, FI | daily high max | 6.0 C (42.8 F) | 0.2 C (0.4 F) | 0 years | 7 of 100 (Routine) |
| 20 December 2025 | Helsinki Kaisaniemi AWS, FI | daily high min | 6.2 C (43.2 F) | 2.1 C (3.8 F) | 4 years | 11 of 100 (Routine) |
| 19 December 2025 | Helsinki Kaisaniemi AWS, FI | daily high min | 5.4 C (41.7 F) | 1.9 C (3.4 F) | 10 years | 13 of 100 (Routine) |
| 17 December 2025 | Helsinki Kaisaniemi AWS, FI | daily high min | 5.8 C (42.4 F) | 2.2 C (4.0 F) | 68 years | 30 of 100 (Routine) |
| 16 December 2025 | Helsinki Kaisaniemi AWS, FI | daily high min | 5.9 C (42.6 F) | 1.3 C (2.3 F) | 32 years | 18 of 100 (Routine) |
| 16 December 2025 | Helsinki Kaisaniemi AWS, FI | daily high max | 7.3 C (45.1 F) | 0.8 C (1.4 F) | 32 years | 17 of 100 (Routine) |
| 11 December 2025 | Helsinki Kaisaniemi AWS, FI | daily high max | 8.5 C (47.3 F) | 0.4 C (0.7 F) | 10 years | 10 of 100 (Routine) |
| 13 November 2025 | Helsinki Kaisaniemi AWS, FI | daily high max | 11.0 C (51.8 F) | 0.3 C (0.5 F) | 3 years | 7 of 100 (Routine) |
| 8 November 2025 | Helsinki Kaisaniemi AWS, FI | daily high min | 8.3 C (46.9 F) | 0.1 C (0.2 F) | 20 years | 13 of 100 (Routine) |
| 8 November 2025 | Helsinki Kaisaniemi AWS, FI | daily high max (Tie) | 10.6 C (51.1 F) | tie | 20 years | 3 of 100 (Routine) |
| 7 November 2025 | Helsinki Kaisaniemi AWS, FI | daily high min | 10.0 C (50.0 F) | 1.4 C (2.5 F) | 58 years | 26 of 100 (Routine) |
| 6 November 2025 | Helsinki Kaisaniemi AWS, FI | daily high min | 10.3 C (50.5 F) | 1.3 C (2.3 F) | 68 years | 29 of 100 (Routine) |
| 5 November 2025 | Helsinki Kaisaniemi AWS, FI | daily high max | 11.5 C (52.7 F) | 1.2 C (2.2 F) | 68 years | 30 of 100 (Routine) |
Climate Trend
74 complete years, 1951 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1951 | 5.2 C | -0.68 C |
| 1953 | 6.2 C | +0.32 C |
| 1954 | 5.6 C | -0.36 C |
| 1955 | 4.5 C | -1.46 C |
| 1956 | 3.8 C | -2.12 C |
| 1957 | 5.9 C | -0.01 C |
| 1958 | 4.1 C | -1.81 C |
| 1959 | 6.5 C | +0.54 C |
| 1960 | 5.2 C | -0.72 C |
| 1961 | 6.9 C | +0.98 C |
| 1962 | 4.6 C | -1.31 C |
| 1963 | 4.8 C | -1.16 C |
| 1964 | 5.5 C | -0.45 C |
| 1965 | 4.9 C | -1.06 C |
| 1966 | 4.1 C | -1.81 C |
| 1967 | 5.5 C | -0.39 C |
| 1968 | 4.8 C | -1.13 C |
| 1969 | 4.3 C | -1.65 C |
| 1970 | 4.4 C | -1.48 C |
| 1971 | 5.2 C | -0.70 C |
| 1972 | 6.1 C | +0.16 C |
| 1973 | 5.4 C | -0.47 C |
| 1974 | 6.7 C | +0.74 C |
| 1975 | 6.9 C | +0.98 C |
| 1976 | 4.2 C | -1.71 C |
| 1977 | 4.6 C | -1.27 C |
| 1978 | 3.9 C | -1.97 C |
| 1979 | 4.9 C | -1.04 C |
| 1980 | 4.9 C | -1.00 C |
| 1981 | 5.1 C | -0.77 C |
| 1982 | 5.8 C | -0.14 C |
| 1983 | 6.2 C | +0.28 C |
| 1984 | 6.1 C | +0.21 C |
| 1985 | 3.5 C | -2.41 C |
| 1986 | 5.0 C | -0.92 C |
| 1987 | 3.5 C | -2.39 C |
| 1988 | 6.0 C | +0.06 C |
| 1989 | 7.2 C | +1.26 C |
| 1990 | 6.8 C | +0.85 C |
| 1991 | 6.2 C | +0.31 C |
| 1992 | 6.5 C | +0.58 C |
| 1993 | 5.6 C | -0.29 C |
| 1994 | 5.3 C | -0.57 C |
| 1995 | 6.2 C | +0.24 C |
| 1996 | 4.9 C | -0.99 C |
| 1997 | 6.1 C | +0.21 C |
| 1998 | 5.4 C | -0.50 C |
| 1999 | 6.3 C | +0.35 C |
| 2000 | 7.2 C | +1.33 C |
| 2001 | 6.0 C | +0.08 C |
| 2002 | 6.2 C | +0.25 C |
| 2003 | 5.7 C | -0.17 C |
| 2004 | 6.2 C | +0.24 C |
| 2005 | 6.6 C | +0.70 C |
| 2006 | 6.7 C | +0.79 C |
| 2007 | 7.1 C | +1.20 C |
| 2008 | 7.7 C | +1.79 C |
| 2009 | 6.3 C | +0.34 C |
| 2010 | 5.1 C | -0.85 C |
| 2011 | 7.2 C | +1.30 C |
| 2012 | 6.0 C | +0.10 C |
| 2013 | 7.0 C | +1.07 C |
| 2014 | 7.4 C | +1.45 C |
| 2015 | 7.8 C | +1.91 C |
| 2016 | 6.7 C | +0.80 C |
| 2017 | 6.7 C | +0.82 C |
| 2018 | 7.3 C | +1.36 C |
| 2019 | 7.5 C | +1.56 C |
| 2020 | 8.7 C | +2.76 C |
| 2021 | 6.6 C | +0.69 C |
| 2022 | 7.3 C | +1.41 C |
| 2023 | 7.0 C | +1.11 C |
| 2024 | 7.8 C | +1.93 C |
| 2025 | 8.3 C | +2.38 C |
The annual mean temperature here has risen by 0.4 C (0.3 to 0.5) per decade over 1951 to 2025. In Fahrenheit: 0.6 F (0.5 to 0.8) per decade. The slope is a straight line fitted to 74 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 | 0.6 F (0.5 to 0.8) per decade | 1951 to 2025 | 74 | Rise |
| Mean daily maximum | 0.4 C (0.3 to 0.4) per decade | 0.6 F (0.5 to 0.8) per decade | 1951 to 2025 | 74 | Rise |
| Mean daily minimum | 0.4 C (0.3 to 0.5) per decade | 0.7 F (0.5 to 0.8) per decade | 1951 to 2025 | 74 | 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
1951 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 33.2 C (91.8 F) | 2019 | 27.5 C (81.5 F) | 75 |
| Coldest night (TNn) | -34.3 C (-29.7 F) | 1987 | -21.9 C (-7.4 F) | 76 |
| Wettest day (Rx1day) | 79.3 mm (3.1 in) | 1993 | 31.2 mm (1.2 in) | 76 |
| Wettest five days (Rx5day) | 126.5 mm (5.0 in) | 1993 | 56.0 mm (2.2 in) | 76 |
| Longest dry spell (CDD) | 51 days | 1996 | 24 days | 76 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1951 | 25.3 C (77.5 F) |
| 1952 | n/a |
| 1953 | 27.7 C (81.9 F) |
| 1954 | 28.0 C (82.4 F) |
| 1955 | 27.3 C (81.1 F) |
| 1956 | 27.0 C (80.6 F) |
| 1957 | 25.7 C (78.3 F) |
| 1958 | 26.6 C (79.9 F) |
| 1959 | 27.8 C (82.0 F) |
| 1960 | 26.6 C (79.9 F) |
| 1961 | 26.6 C (79.9 F) |
| 1962 | 22.8 C (73.0 F) |
| 1963 | 27.6 C (81.7 F) |
| 1964 | 27.4 C (81.3 F) |
| 1965 | 26.2 C (79.2 F) |
| 1966 | 27.7 C (81.9 F) |
| 1967 | 27.0 C (80.6 F) |
| 1968 | 27.5 C (81.5 F) |
| 1969 | 27.4 C (81.3 F) |
| 1970 | 26.4 C (79.5 F) |
| 1971 | 26.5 C (79.7 F) |
| 1972 | 30.5 C (86.9 F) |
| 1973 | 29.4 C (84.9 F) |
| 1974 | 23.6 C (74.5 F) |
| 1975 | 31.2 C (88.2 F) |
| 1976 | 25.0 C (77.0 F) |
| 1977 | 27.8 C (82.0 F) |
| 1978 | 25.5 C (77.9 F) |
| 1979 | 24.5 C (76.1 F) |
| 1980 | 28.0 C (82.4 F) |
| 1981 | 25.2 C (77.4 F) |
| 1982 | 27.0 C (80.6 F) |
| 1983 | 30.8 C (87.4 F) |
| 1984 | 26.1 C (79.0 F) |
| 1985 | 26.1 C (79.0 F) |
| 1986 | 28.5 C (83.3 F) |
| 1987 | 25.2 C (77.4 F) |
| 1988 | 28.7 C (83.7 F) |
| 1989 | 28.3 C (82.9 F) |
| 1990 | 25.0 C (77.0 F) |
| 1991 | 28.5 C (83.3 F) |
| 1992 | 27.8 C (82.0 F) |
| 1993 | 24.7 C (76.5 F) |
| 1994 | 28.7 C (83.7 F) |
| 1995 | 27.7 C (81.9 F) |
| 1996 | 25.5 C (77.9 F) |
| 1997 | 28.4 C (83.1 F) |
| 1998 | 25.4 C (77.7 F) |
| 1999 | 27.9 C (82.2 F) |
| 2000 | 26.3 C (79.3 F) |
| 2001 | 27.3 C (81.1 F) |
| 2002 | 27.8 C (82.0 F) |
| 2003 | 29.6 C (85.3 F) |
| 2004 | 27.0 C (80.6 F) |
| 2005 | 29.6 C (85.3 F) |
| 2006 | 29.2 C (84.6 F) |
| 2007 | 27.5 C (81.5 F) |
| 2008 | 26.9 C (80.4 F) |
| 2009 | 28.5 C (83.3 F) |
| 2010 | 30.1 C (86.2 F) |
| 2011 | 29.3 C (84.7 F) |
| 2012 | 26.6 C (79.9 F) |
| 2013 | 28.6 C (83.5 F) |
| 2014 | 29.6 C (85.3 F) |
| 2015 | 26.9 C (80.4 F) |
| 2016 | 25.4 C (77.7 F) |
| 2017 | 24.2 C (75.6 F) |
| 2018 | 30.4 C (86.7 F) |
| 2019 | 33.2 C (91.8 F) |
| 2020 | 28.0 C (82.4 F) |
| 2021 | 30.2 C (86.4 F) |
| 2022 | 29.5 C (85.1 F) |
| 2023 | 28.5 C (83.3 F) |
| 2024 | 26.6 C (79.9 F) |
| 2025 | 28.4 C (83.1 F) |
| 2026 | 28.7 C (83.7 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1951 | -24.1 C (-11.4 F) |
| 1952 | -19.2 C (-2.6 F) |
| 1953 | -21.5 C (-6.7 F) |
| 1954 | -22.1 C (-7.8 F) |
| 1955 | -24.8 C (-12.6 F) |
| 1956 | -28.2 C (-18.8 F) |
| 1957 | -19.5 C (-3.1 F) |
| 1958 | -27.0 C (-16.6 F) |
| 1959 | -19.4 C (-2.9 F) |
| 1960 | -23.3 C (-9.9 F) |
| 1961 | -20.8 C (-5.4 F) |
| 1962 | -20.3 C (-4.5 F) |
| 1963 | -24.9 C (-12.8 F) |
| 1964 | -22.9 C (-9.2 F) |
| 1965 | -22.5 C (-8.5 F) |
| 1966 | -31.5 C (-24.7 F) |
| 1967 | -27.7 C (-17.9 F) |
| 1968 | -29.9 C (-21.8 F) |
| 1969 | -24.9 C (-12.8 F) |
| 1970 | -24.1 C (-11.4 F) |
| 1971 | -19.6 C (-3.3 F) |
| 1972 | -22.1 C (-7.8 F) |
| 1973 | -24.9 C (-12.8 F) |
| 1974 | -11.1 C (12.0 F) |
| 1975 | -19.4 C (-2.9 F) |
| 1976 | -23.5 C (-10.3 F) |
| 1977 | -25.8 C (-14.4 F) |
| 1978 | -29.5 C (-21.1 F) |
| 1979 | -26.0 C (-14.8 F) |
| 1980 | -24.1 C (-11.4 F) |
| 1981 | -20.5 C (-4.9 F) |
| 1982 | -27.5 C (-17.5 F) |
| 1983 | -18.6 C (-1.5 F) |
| 1984 | -17.3 C (0.9 F) |
| 1985 | -26.5 C (-15.7 F) |
| 1986 | -23.2 C (-9.8 F) |
| 1987 | -34.3 C (-29.7 F) |
| 1988 | -17.5 C (0.5 F) |
| 1989 | -21.1 C (-6.0 F) |
| 1990 | -17.2 C (1.0 F) |
| 1991 | -20.6 C (-5.1 F) |
| 1992 | -19.0 C (-2.2 F) |
| 1993 | -17.7 C (0.1 F) |
| 1994 | -23.6 C (-10.5 F) |
| 1995 | -24.6 C (-12.3 F) |
| 1996 | -24.4 C (-11.9 F) |
| 1997 | -18.9 C (-2.0 F) |
| 1998 | -20.1 C (-4.2 F) |
| 1999 | -26.5 C (-15.7 F) |
| 2000 | -18.0 C (-0.4 F) |
| 2001 | -22.8 C (-9.0 F) |
| 2002 | -23.5 C (-10.3 F) |
| 2003 | -27.0 C (-16.6 F) |
| 2004 | -19.4 C (-2.9 F) |
| 2005 | -18.3 C (-0.9 F) |
| 2006 | -22.8 C (-9.0 F) |
| 2007 | -21.7 C (-7.1 F) |
| 2008 | -10.8 C (12.6 F) |
| 2009 | -18.3 C (-0.9 F) |
| 2010 | -22.6 C (-8.7 F) |
| 2011 | -23.9 C (-11.0 F) |
| 2012 | -26.2 C (-15.2 F) |
| 2013 | -22.6 C (-8.7 F) |
| 2014 | -18.2 C (-0.8 F) |
| 2015 | -14.0 C (6.8 F) |
| 2016 | -23.9 C (-11.0 F) |
| 2017 | -21.0 C (-5.8 F) |
| 2018 | -19.7 C (-3.5 F) |
| 2019 | -20.3 C (-4.5 F) |
| 2020 | -8.2 C (17.2 F) |
| 2021 | -21.2 C (-6.2 F) |
| 2022 | -17.6 C (0.3 F) |
| 2023 | -14.2 C (6.4 F) |
| 2024 | -21.2 C (-6.2 F) |
| 2025 | -14.2 C (6.4 F) |
| 2026 | -20.2 C (-4.4 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1951 | 21.8 mm (0.9 in) |
| 1952 | 36.4 mm (1.4 in) |
| 1953 | 40.8 mm (1.6 in) |
| 1954 | 25.4 mm (1.0 in) |
| 1955 | 25.8 mm (1.0 in) |
| 1956 | 29.0 mm (1.1 in) |
| 1957 | 25.4 mm (1.0 in) |
| 1958 | 22.1 mm (0.9 in) |
| 1959 | 26.5 mm (1.0 in) |
| 1960 | 52.9 mm (2.1 in) |
| 1961 | 20.9 mm (0.8 in) |
| 1962 | 40.7 mm (1.6 in) |
| 1963 | 45.6 mm (1.8 in) |
| 1964 | 18.0 mm (0.7 in) |
| 1965 | 31.1 mm (1.2 in) |
| 1966 | 24.2 mm (1.0 in) |
| 1967 | 53.3 mm (2.1 in) |
| 1968 | 21.9 mm (0.9 in) |
| 1969 | 21.3 mm (0.8 in) |
| 1970 | 41.9 mm (1.6 in) |
| 1971 | 18.0 mm (0.7 in) |
| 1972 | 45.5 mm (1.8 in) |
| 1973 | 28.1 mm (1.1 in) |
| 1974 | 34.2 mm (1.3 in) |
| 1975 | 15.3 mm (0.6 in) |
| 1976 | 42.3 mm (1.7 in) |
| 1977 | 24.9 mm (1.0 in) |
| 1978 | 34.5 mm (1.4 in) |
| 1979 | 18.9 mm (0.7 in) |
| 1980 | 21.1 mm (0.8 in) |
| 1981 | 32.8 mm (1.3 in) |
| 1982 | 33.5 mm (1.3 in) |
| 1983 | 27.8 mm (1.1 in) |
| 1984 | 30.7 mm (1.2 in) |
| 1985 | 23.5 mm (0.9 in) |
| 1986 | 25.9 mm (1.0 in) |
| 1987 | 36.6 mm (1.4 in) |
| 1988 | 38.4 mm (1.5 in) |
| 1989 | 36.8 mm (1.4 in) |
| 1990 | 25.4 mm (1.0 in) |
| 1991 | 23.0 mm (0.9 in) |
| 1992 | 43.5 mm (1.7 in) |
| 1993 | 79.3 mm (3.1 in) |
| 1994 | 32.1 mm (1.3 in) |
| 1995 | 32.0 mm (1.3 in) |
| 1996 | 50.0 mm (2.0 in) |
| 1997 | 22.8 mm (0.9 in) |
| 1998 | 25.7 mm (1.0 in) |
| 1999 | 34.3 mm (1.4 in) |
| 2000 | 25.9 mm (1.0 in) |
| 2001 | 36.3 mm (1.4 in) |
| 2002 | 21.4 mm (0.8 in) |
| 2003 | 31.5 mm (1.2 in) |
| 2004 | 38.2 mm (1.5 in) |
| 2005 | 31.2 mm (1.2 in) |
| 2006 | 37.6 mm (1.5 in) |
| 2007 | 34.3 mm (1.4 in) |
| 2008 | 23.1 mm (0.9 in) |
| 2009 | 29.6 mm (1.2 in) |
| 2010 | 27.5 mm (1.1 in) |
| 2011 | 52.0 mm (2.0 in) |
| 2012 | 25.1 mm (1.0 in) |
| 2013 | 43.3 mm (1.7 in) |
| 2014 | 26.6 mm (1.0 in) |
| 2015 | 28.2 mm (1.1 in) |
| 2016 | 41.8 mm (1.6 in) |
| 2017 | 29.7 mm (1.2 in) |
| 2018 | 23.6 mm (0.9 in) |
| 2019 | 50.2 mm (2.0 in) |
| 2020 | 33.9 mm (1.3 in) |
| 2021 | 39.7 mm (1.6 in) |
| 2022 | 32.3 mm (1.3 in) |
| 2023 | 37.8 mm (1.5 in) |
| 2024 | 43.1 mm (1.7 in) |
| 2025 | 41.4 mm (1.6 in) |
| 2026 | 21.8 mm (0.9 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1951 | 38.8 mm (1.5 in) |
| 1952 | 75.1 mm (3.0 in) |
| 1953 | 72.3 mm (2.8 in) |
| 1954 | 46.1 mm (1.8 in) |
| 1955 | 49.4 mm (1.9 in) |
| 1956 | 61.4 mm (2.4 in) |
| 1957 | 55.7 mm (2.2 in) |
| 1958 | 39.8 mm (1.6 in) |
| 1959 | 40.8 mm (1.6 in) |
| 1960 | 69.5 mm (2.7 in) |
| 1961 | 40.6 mm (1.6 in) |
| 1962 | 55.0 mm (2.2 in) |
| 1963 | 77.4 mm (3.0 in) |
| 1964 | 37.3 mm (1.5 in) |
| 1965 | 56.2 mm (2.2 in) |
| 1966 | 32.8 mm (1.3 in) |
| 1967 | 91.5 mm (3.6 in) |
| 1968 | 46.0 mm (1.8 in) |
| 1969 | 31.9 mm (1.3 in) |
| 1970 | 74.6 mm (2.9 in) |
| 1971 | 42.6 mm (1.7 in) |
| 1972 | 76.5 mm (3.0 in) |
| 1973 | 40.4 mm (1.6 in) |
| 1974 | 60.8 mm (2.4 in) |
| 1975 | 34.2 mm (1.3 in) |
| 1976 | 60.4 mm (2.4 in) |
| 1977 | 49.6 mm (2.0 in) |
| 1978 | 58.8 mm (2.3 in) |
| 1979 | 36.9 mm (1.5 in) |
| 1980 | 45.8 mm (1.8 in) |
| 1981 | 83.0 mm (3.3 in) |
| 1982 | 56.3 mm (2.2 in) |
| 1983 | 69.8 mm (2.7 in) |
| 1984 | 58.5 mm (2.3 in) |
| 1985 | 47.0 mm (1.9 in) |
| 1986 | 65.6 mm (2.6 in) |
| 1987 | 52.3 mm (2.1 in) |
| 1988 | 68.6 mm (2.7 in) |
| 1989 | 52.9 mm (2.1 in) |
| 1990 | 56.7 mm (2.2 in) |
| 1991 | 43.9 mm (1.7 in) |
| 1992 | 79.2 mm (3.1 in) |
| 1993 | 126.5 mm (5.0 in) |
| 1994 | 41.0 mm (1.6 in) |
| 1995 | 43.5 mm (1.7 in) |
| 1996 | 77.5 mm (3.1 in) |
| 1997 | 34.6 mm (1.4 in) |
| 1998 | 58.9 mm (2.3 in) |
| 1999 | 53.1 mm (2.1 in) |
| 2000 | 42.7 mm (1.7 in) |
| 2001 | 46.1 mm (1.8 in) |
| 2002 | 40.8 mm (1.6 in) |
| 2003 | 62.5 mm (2.5 in) |
| 2004 | 115.5 mm (4.5 in) |
| 2005 | 84.7 mm (3.3 in) |
| 2006 | 77.5 mm (3.1 in) |
| 2007 | 56.3 mm (2.2 in) |
| 2008 | 61.6 mm (2.4 in) |
| 2009 | 61.6 mm (2.4 in) |
| 2010 | 55.6 mm (2.2 in) |
| 2011 | 60.2 mm (2.4 in) |
| 2012 | 45.4 mm (1.8 in) |
| 2013 | 85.8 mm (3.4 in) |
| 2014 | 55.1 mm (2.2 in) |
| 2015 | 44.2 mm (1.7 in) |
| 2016 | 99.1 mm (3.9 in) |
| 2017 | 76.8 mm (3.0 in) |
| 2018 | 38.3 mm (1.5 in) |
| 2019 | 64.5 mm (2.5 in) |
| 2020 | 40.4 mm (1.6 in) |
| 2021 | 60.8 mm (2.4 in) |
| 2022 | 49.4 mm (1.9 in) |
| 2023 | 108.3 mm (4.3 in) |
| 2024 | 48.0 mm (1.9 in) |
| 2025 | 62.0 mm (2.4 in) |
| 2026 | 41.2 mm (1.6 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1951 | 32 days |
| 1952 | 11 days |
| 1953 | 21 days |
| 1954 | 27 days |
| 1955 | 20 days |
| 1956 | 29 days |
| 1957 | 18 days |
| 1958 | 22 days |
| 1959 | 29 days |
| 1960 | 32 days |
| 1961 | 28 days |
| 1962 | 15 days |
| 1963 | 19 days |
| 1964 | 28 days |
| 1965 | 24 days |
| 1966 | 24 days |
| 1967 | 16 days |
| 1968 | 20 days |
| 1969 | 31 days |
| 1970 | 29 days |
| 1971 | 18 days |
| 1972 | 38 days |
| 1973 | 23 days |
| 1974 | 25 days |
| 1975 | 16 days |
| 1976 | 24 days |
| 1977 | 14 days |
| 1978 | 23 days |
| 1979 | 20 days |
| 1980 | 23 days |
| 1981 | 19 days |
| 1982 | 20 days |
| 1983 | 18 days |
| 1984 | 16 days |
| 1985 | 14 days |
| 1986 | 25 days |
| 1987 | 32 days |
| 1988 | 27 days |
| 1989 | 13 days |
| 1990 | 25 days |
| 1991 | 21 days |
| 1992 | 32 days |
| 1993 | 24 days |
| 1994 | 34 days |
| 1995 | 22 days |
| 1996 | 51 days |
| 1997 | 34 days |
| 1998 | 15 days |
| 1999 | 25 days |
| 2000 | 33 days |
| 2001 | 19 days |
| 2002 | 26 days |
| 2003 | 30 days |
| 2004 | 13 days |
| 2005 | 25 days |
| 2006 | 25 days |
| 2007 | 26 days |
| 2008 | 23 days |
| 2009 | 29 days |
| 2010 | 20 days |
| 2011 | 29 days |
| 2012 | 13 days |
| 2013 | 29 days |
| 2014 | 21 days |
| 2015 | 20 days |
| 2016 | 24 days |
| 2017 | 16 days |
| 2018 | 38 days |
| 2019 | 21 days |
| 2020 | 21 days |
| 2021 | 17 days |
| 2022 | 20 days |
| 2023 | 27 days |
| 2024 | 33 days |
| 2025 | 25 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
74 years with a frostAcross 74 years with a frost, the median last spring frost at Helsinki Kaisaniemi AWS falls on 30 April and the median first autumn frost on 13 October, which leaves a median of 165 days between them.
In 1996 to 2025 the median growing season was 170 days. That is 10 days more than in 1951 to 1981.
Fitted over all years, the growing season changes by +1.3 days per decade at this station.
| Measure | Median, all years | Earliest period (1951 to 1981) | Recent period (1996 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 30 April | 2 May | 29 April | 3 days earlier | -1.0 days per decade |
| First autumn frost | 13 October | 11 October | 17 October | 6 days later | +0.3 days per decade |
| Growing days | 165 days | 160 days | 170 days | 10 days more | +1.3 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
75 years, 1951 to 2025A day with at least 30.8 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 66.5 mm (2.6 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 30.8 mm (1.2 in) | |
| 5 years | 40.2 mm (1.6 in) | |
| 10 years | 46.4 mm (1.8 in) | |
| 25 years | 54.4 mm (2.1 in) | |
| 50 years | 60.4 mm (2.4 in) | |
| 100 years | 66.5 mm (2.6 in) | Longer than the 75 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, 75 years of values from 1951 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: 79.3 mm (3.1 in) in 1993; 53.3 mm (2.1 in) in 1967; 52.9 mm (2.1 in) in 1960.
Station Changes
3 suspected3 changes were suspected in the annual mean temperature of Helsinki Kaisaniemi AWS, at 1970, 1989 and 2007. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1970 ran 0.1 C (0.2 F) lower than in the years before (possible change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1989 ran 0.2 C (0.4 F) lower than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2007 ran 0.2 C (0.3 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1970 | -0.1 | -0.2 | possible | 5 |
| 1989 | -0.2 | -0.4 | likely | 5 |
| 2007 | +0.2 | +0.3 | likely | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Climate Twins
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Helsinki Kaisaniemi AWS had a mean temperature of 7.3 C (45.1 F) and 685.3 mm (27.0 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Klaipeda (Lithuania, 543 km away), Liepaja (Latvia, 469 km away) and Stockholm (Sweden, 397 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Klaipeda | Lithuania | 543 km (337 mi) | 7.1 C (44.8 F) | 744.7 mm (29.3 in) | 0.89 |
| Liepaja | Latvia | 469 km (291 mi) | 6.8 C (44.3 F) | 678.5 mm (26.7 in) | 0.92 |
| Stockholm | Sweden | 397 km (247 mi) | 6.8 C (44.2 F) | 538.9 mm (21.2 in) | 0.92 |
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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-12).