Ahtari Myllymaki Weather Records (FIE00144482)
Record envelope, standing records and threshold days for Ahtari Myllymaki (FIE00144482), Finland, with 68 years of record.
Key Facts for Ahtari Myllymaki
- Ahtari Myllymaki (FIE00144482) is a weather station in Finland at 62.53 latitude and 24.22 longitude, 157 m (515 ft) above sea level.
- The station reports from 1959 to 2026, 68 years of record.
- 1,464 records set at Ahtari Myllymaki still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Ahtari Myllymaki set a daily record high minimum temperature of 14.3 C (57.7 F) on 31 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, 62.53 latitude, 24.22 longitude.
- Elevation: 157 m (515 ft).
- Period of record: 1959 to 2026, 68 years.
- Eligible elements: tmax, tmin, prcp.
Daily Record Envelope and 2026
4 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 8.4 C (47.1 F) | -39.8 C (-39.6 F) | 1.4 C (34.5 F) | -26.9 C (-16.4 F) |
| Feb | 9.7 C (49.5 F) | -42.1 C (-43.8 F) | 3.1 C (37.6 F) | -28.8 C (-19.8 F) |
| Mar | 15.5 C (59.9 F) | -32.2 C (-26.0 F) | 9.9 C (49.8 F) | -10.5 C (13.1 F) |
| Apr | 22.5 C (72.5 F) | -20.9 C (-5.6 F) | 16.1 C (61.0 F) | -6.4 C (20.5 F) |
| May | 28.8 C (83.8 F) | -9.9 C (14.2 F) | 22.9 C (73.2 F) | -3.3 C (26.1 F) |
| Jun | 31.6 C (88.9 F) | -4.3 C (24.3 F) | 26.1 C (79.0 F) | 6.3 C (43.3 F) |
| Jul | 33.5 C (92.3 F) | -1.2 C (29.8 F) | 27.5 C (81.5 F) | 6.2 C (43.2 F) |
| Aug | 30.4 C (86.7 F) | -4.5 C (23.9 F) | 24.0 C (75.2 F) | 4.4 C (39.9 F) |
| Sep | 26.2 C (79.2 F) | -9.2 C (15.4 F) | n/a | n/a |
| Oct | 18.8 C (65.8 F) | -23.6 C (-10.5 F) | n/a | n/a |
| Nov | 12.1 C (53.8 F) | -32.0 C (-25.6 F) | n/a | n/a |
| Dec | 8.5 C (47.3 F) | -37.0 C (-34.6 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1959 | 18 |
| 1960 | 13 |
| 1961 | 15 |
| 1962 | 20 |
| 1963 | 19 |
| 1964 | 5 |
| 1965 | 30 |
| 1966 | 42 |
| 1967 | 17 |
| 1968 | 32 |
| 1969 | 21 |
| 1970 | 9 |
| 1971 | 33 |
| 1972 | 23 |
| 1973 | 28 |
| 1974 | 9 |
| 1975 | 28 |
| 1976 | 20 |
| 1977 | 33 |
| 1978 | 29 |
| 1979 | 18 |
| 1980 | 11 |
| 1981 | 21 |
| 1982 | 16 |
| 1983 | 24 |
| 1984 | 20 |
| 1985 | 23 |
| 1986 | 18 |
| 1987 | 37 |
| 1988 | 18 |
| 1989 | 26 |
| 1990 | 24 |
| 1991 | 10 |
| 1992 | 34 |
| 1993 | 16 |
| 1994 | 15 |
| 1995 | 25 |
| 1996 | 11 |
| 1997 | 17 |
| 1998 | 20 |
| 1999 | 23 |
| 2000 | 19 |
| 2001 | 18 |
| 2002 | 21 |
| 2003 | 15 |
| 2004 | 9 |
| 2005 | 16 |
| 2006 | 40 |
| 2007 | 28 |
| 2008 | 11 |
| 2009 | 14 |
| 2010 | 27 |
| 2011 | 22 |
| 2012 | 13 |
| 2013 | 17 |
| 2014 | 20 |
| 2015 | 29 |
| 2016 | 10 |
| 2017 | 12 |
| 2018 | 26 |
| 2019 | 30 |
| 2020 | 35 |
| 2021 | 24 |
| 2022 | 27 |
| 2023 | 18 |
| 2024 | 35 |
| 2025 | 45 |
| 2026 | 12 |
All-Time Record Progression
10 new records| Date | Kind | Detail |
|---|---|---|
| 1991-09-27 | Record daily precipitation | Record daily precipitation 40.6 mm (1.6 in) |
| 1996-08-03 | Record daily precipitation | Record daily precipitation 47.3 mm (1.9 in) |
| 1999-07-15 | Record high minimum temperature | Record high minimum temperature 19.5 C (67.1 F) |
| 2003-07-16 | Record high maximum temperature | Record high maximum temperature 30.8 C (87.4 F) |
| 2010-07-13 | Record high maximum temperature | Record high maximum temperature 31.6 C (88.9 F) |
| 2010-07-27 | Record high minimum temperature | Record high minimum temperature 20.7 C (69.3 F) |
| 2010-07-29 | Record high maximum temperature | Record high maximum temperature 33.5 C (92.3 F) |
| 2012-07-08 | Record daily precipitation | Record daily precipitation 47.7 mm (1.9 in) |
| 2023-07-28 | Record daily precipitation | Record daily precipitation 57.5 mm (2.3 in) |
| 2026-07-18 | Record daily precipitation | Record daily precipitation 69.6 mm (2.7 in) |
Wettest Day of Each Month
Jul: 69.6 mm (2.7 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 20.1 mm (0.8 in) | 25 January 2002 |
| Feb | 26.4 mm (1.0 in) | 16 February 2024 |
| Mar | 20.1 mm (0.8 in) | 12 March 2013 |
| Apr | 21.1 mm (0.8 in) | 26 April 2016 |
| May | 44.4 mm (1.7 in) | 25 May 2014 |
| Jun | 37.8 mm (1.5 in) | 14 June 1961 |
| Jul | 69.6 mm (2.7 in) | 18 July 2026 |
| Aug | 57.2 mm (2.3 in) | 28 August 2023 |
| Sep | 40.6 mm (1.6 in) | 27 September 1991 |
| Oct | 33.0 mm (1.3 in) | 31 October 2001 |
| Nov | 26.1 mm (1.0 in) | 5 November 2000 |
| Dec | 19.0 mm (0.7 in) | 29 December 2003 |
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 | 363 | 99% | 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 | 365 | 100% | 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 | 351 | 96% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 364 | 100% | Yes |
| 2018 | 363 | 99% | 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 |
|---|---|---|---|---|---|---|
| 31 August 2026 | Ahtari Myllymaki, FI | daily high min (Provisional) | 14.3 C (57.7 F) | 0.6 C (1.1 F) | 3 years | 7 of 100 (Routine) |
| 16 August 2026 | Ahtari Myllymaki, FI | daily rain (Provisional) | 32.6 mm (1.3 in) | 14.5 mm (0.6 in) | 17 years | 33 of 100 (Routine) |
| 10 August 2026 | Ahtari Myllymaki, FI | daily rain | 16.2 mm (0.6 in) | 1.8 mm (0.07 in) | 40 years | 20 of 100 (Routine) |
| 27 July 2026 | Ahtari Myllymaki, FI | daily rain | 26.4 mm (1.0 in) | 3.5 mm (0.14 in) | 37 years | 22 of 100 (Routine) |
| 18 July 2026 | Ahtari Myllymaki, FI | all-time rain | 69.6 mm (2.7 in) | 12.1 mm (0.5 in) | 2 years | 45 of 100 (Notable) |
| 12 July 2026 | Ahtari Myllymaki, FI | daily high min | 17.4 C (63.3 F) | 0.9 C (1.6 F) | 28 years | 16 of 100 (Routine) |
| 11 July 2026 | Ahtari Myllymaki, FI | daily high max | 27.5 C (81.5 F) | 0.2 C (0.4 F) | 4 years | 7 of 100 (Routine) |
| 21 June 2026 | Ahtari Myllymaki, FI | daily high min | 17.4 C (63.3 F) | 0.3 C (0.5 F) | 7 years | 8 of 100 (Routine) |
| 6 June 2026 | Ahtari Myllymaki, FI | daily high min | 14.6 C (58.3 F) | 0.4 C (0.7 F) | 7 years | 8 of 100 (Routine) |
| 13 May 2026 | Ahtari Myllymaki, FI | daily high min (Tie) | 8.4 C (47.1 F) | tie | 43 years | 4 of 100 (Routine) |
| 5 April 2026 | Ahtari Myllymaki, FI | daily high min (Tie) | 1.8 C (35.2 F) | tie | 60 years | 6 of 100 (Routine) |
| 26 March 2026 | Ahtari Myllymaki, FI | monthly high min (Tie) | 3.4 C (38.1 F) | tie | 44 years | 7 of 100 (Routine) |
| 23 March 2026 | Ahtari Myllymaki, FI | daily high min | 1.2 C (34.2 F) | 0.7 C (1.3 F) | 40 years | 18 of 100 (Routine) |
| 22 March 2026 | Ahtari Myllymaki, FI | daily high max | 9.9 C (49.8 F) | 1.7 C (3.1 F) | 4 years | 10 of 100 (Routine) |
| 19 March 2026 | Ahtari Myllymaki, FI | daily high min | 2.4 C (36.3 F) | 0.4 C (0.7 F) | 33 years | 16 of 100 (Routine) |
| 15 March 2026 | Ahtari Myllymaki, FI | daily high min | 1.6 C (34.9 F) | 0.2 C (0.4 F) | 1 year | 6 of 100 (Routine) |
| 14 March 2026 | Ahtari Myllymaki, FI | daily high min | 3.1 C (37.6 F) | 1.3 C (2.3 F) | 32 years | 16 of 100 (Routine) |
| 12 March 2026 | Ahtari Myllymaki, FI | daily high min | 2.4 C (36.3 F) | 1.9 C (3.4 F) | 32 years | 17 of 100 (Routine) |
| 6 March 2026 | Ahtari Myllymaki, FI | daily high max | 8.6 C (47.5 F) | 0.4 C (0.7 F) | 0 years | 6 of 100 (Routine) |
| 5 March 2026 | Ahtari Myllymaki, FI | daily high max | 4.8 C (40.6 F) | 0.1 C (0.2 F) | 0 years | 6 of 100 (Routine) |
Climate Trend
66 complete years, 1959 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1959 | 3.4 C | +0.35 C |
| 1960 | 2.8 C | -0.20 C |
| 1961 | 4.2 C | +1.17 C |
| 1962 | 1.8 C | -1.21 C |
| 1963 | 2.1 C | -0.91 C |
| 1964 | 2.7 C | -0.38 C |
| 1965 | 2.0 C | -1.00 C |
| 1966 | 1.1 C | -1.94 C |
| 1967 | 2.9 C | -0.13 C |
| 1968 | 1.4 C | -1.59 C |
| 1969 | 0.8 C | -2.19 C |
| 1970 | 1.6 C | -1.40 C |
| 1971 | 1.8 C | -1.24 C |
| 1972 | 3.6 C | +0.54 C |
| 1973 | 2.3 C | -0.71 C |
| 1974 | 4.0 C | +0.97 C |
| 1975 | 3.6 C | +0.61 C |
| 1976 | 0.8 C | -2.25 C |
| 1977 | 2.1 C | -0.94 C |
| 1978 | 0.7 C | -2.33 C |
| 1979 | 2.2 C | -0.81 C |
| 1980 | 1.6 C | -1.46 C |
| 1981 | 1.8 C | -1.25 C |
| 1982 | 2.3 C | -0.70 C |
| 1983 | 2.7 C | -0.35 C |
| 1984 | 3.2 C | +0.21 C |
| 1985 | 0.3 C | -2.78 C |
| 1986 | 1.8 C | -1.26 C |
| 1987 | 0.3 C | -2.77 C |
| 1988 | 2.8 C | -0.23 C |
| 1989 | 4.4 C | +1.37 C |
| 1990 | 3.7 C | +0.62 C |
| 1991 | 3.3 C | +0.28 C |
| 1992 | 3.3 C | +0.25 C |
| 1993 | 2.7 C | -0.38 C |
| 1994 | 2.4 C | -0.65 C |
| 1995 | 3.1 C | +0.11 C |
| 1996 | 2.3 C | -0.76 C |
| 1997 | 2.9 C | -0.13 C |
| 1998 | 2.4 C | -0.65 C |
| 1999 | 3.3 C | +0.29 C |
| 2000 | 4.5 C | +1.45 C |
| 2001 | 2.8 C | -0.21 C |
| 2002 | 3.0 C | -0.03 C |
| 2003 | 3.1 C | +0.03 C |
| 2004 | 3.2 C | +0.13 C |
| 2005 | 3.8 C | +0.78 C |
| 2006 | 3.8 C | +0.77 C |
| 2007 | 3.9 C | +0.86 C |
| 2008 | 4.3 C | +1.25 C |
| 2009 | 3.1 C | +0.02 C |
| 2011 | 4.2 C | +1.20 C |
| 2012 | 2.7 C | -0.37 C |
| 2013 | 4.2 C | +1.17 C |
| 2014 | 4.6 C | +1.57 C |
| 2015 | 4.9 C | +1.89 C |
| 2016 | 3.7 C | +0.65 C |
| 2017 | 3.7 C | +0.70 C |
| 2018 | 3.9 C | +0.89 C |
| 2019 | 4.4 C | +1.36 C |
| 2020 | 6.1 C | +3.05 C |
| 2021 | 4.0 C | +0.94 C |
| 2022 | 4.6 C | +1.60 C |
| 2023 | 4.2 C | +1.12 C |
| 2024 | 4.9 C | +1.91 C |
| 2025 | 5.8 C | +2.79 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 1.0) per decade. The slope is a straight line fitted to 66 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 1.0) per decade | 1959 to 2025 | 66 | Rise |
| Mean daily maximum | 0.4 C (0.3 to 0.5) per decade | 0.7 F (0.5 to 0.9) per decade | 1959 to 2025 | 66 | Rise |
| Mean daily minimum | 0.4 C (0.3 to 0.6) per decade | 0.8 F (0.5 to 1.1) per decade | 1959 to 2025 | 66 | 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) | 33.5 C (92.3 F) | 2010 | 28.2 C (82.7 F) | 68 |
| Coldest night (TNn) | -42.1 C (-43.8 F) | 1966 | -32.1 C (-25.8 F) | 68 |
| Wettest day (Rx1day) | 69.6 mm (2.7 in) | 2026 | 26.2 mm (1.0 in) | 68 |
| Wettest five days (Rx5day) | 102.6 mm (4.0 in) | 2012 | 47.9 mm (1.9 in) | 68 |
| Longest dry spell (CDD) | 45 days | 1974 | 21 days | 68 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1959 | 28.9 C (84.0 F) |
| 1960 | 29.6 C (85.3 F) |
| 1961 | 27.6 C (81.7 F) |
| 1962 | 23.9 C (75.0 F) |
| 1963 | 30.0 C (86.0 F) |
| 1964 | 28.5 C (83.3 F) |
| 1965 | 26.7 C (80.1 F) |
| 1966 | 29.1 C (84.4 F) |
| 1967 | 28.1 C (82.6 F) |
| 1968 | 29.0 C (84.2 F) |
| 1969 | 28.1 C (82.6 F) |
| 1970 | 27.4 C (81.3 F) |
| 1971 | 27.0 C (80.6 F) |
| 1972 | 30.5 C (86.9 F) |
| 1973 | 29.7 C (85.5 F) |
| 1974 | 27.6 C (81.7 F) |
| 1975 | 26.9 C (80.4 F) |
| 1976 | 25.5 C (77.9 F) |
| 1977 | 30.2 C (86.4 F) |
| 1978 | 27.8 C (82.0 F) |
| 1979 | 26.8 C (80.2 F) |
| 1980 | 29.3 C (84.7 F) |
| 1981 | 27.5 C (81.5 F) |
| 1982 | 27.8 C (82.0 F) |
| 1983 | 28.0 C (82.4 F) |
| 1984 | 26.4 C (79.5 F) |
| 1985 | 27.1 C (80.8 F) |
| 1986 | 29.6 C (85.3 F) |
| 1987 | 27.0 C (80.6 F) |
| 1988 | 30.7 C (87.3 F) |
| 1989 | 27.3 C (81.1 F) |
| 1990 | 25.6 C (78.1 F) |
| 1991 | 27.0 C (80.6 F) |
| 1992 | 29.1 C (84.4 F) |
| 1993 | 26.5 C (79.7 F) |
| 1994 | 30.6 C (87.1 F) |
| 1995 | 29.0 C (84.2 F) |
| 1996 | 26.2 C (79.2 F) |
| 1997 | 29.7 C (85.5 F) |
| 1998 | 28.5 C (83.3 F) |
| 1999 | 30.1 C (86.2 F) |
| 2000 | 29.0 C (84.2 F) |
| 2001 | 28.0 C (82.4 F) |
| 2002 | 27.9 C (82.2 F) |
| 2003 | 30.8 C (87.4 F) |
| 2004 | 26.8 C (80.2 F) |
| 2005 | 28.2 C (82.8 F) |
| 2006 | 29.3 C (84.7 F) |
| 2007 | 27.8 C (82.0 F) |
| 2008 | 26.4 C (79.5 F) |
| 2009 | 28.1 C (82.6 F) |
| 2010 | 33.5 C (92.3 F) |
| 2011 | 29.3 C (84.7 F) |
| 2012 | 27.5 C (81.5 F) |
| 2013 | 28.8 C (83.8 F) |
| 2014 | 30.2 C (86.4 F) |
| 2015 | 27.4 C (81.3 F) |
| 2016 | 27.6 C (81.7 F) |
| 2017 | 23.8 C (74.8 F) |
| 2018 | 31.7 C (89.1 F) |
| 2019 | 31.3 C (88.3 F) |
| 2020 | 31.6 C (88.9 F) |
| 2021 | 31.5 C (88.7 F) |
| 2022 | 30.7 C (87.3 F) |
| 2023 | 30.1 C (86.2 F) |
| 2024 | 29.4 C (84.9 F) |
| 2025 | 31.7 C (89.1 F) |
| 2026 | 27.5 C (81.5 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1959 | -31.8 C (-25.2 F) |
| 1960 | -31.5 C (-24.7 F) |
| 1961 | -28.4 C (-19.1 F) |
| 1962 | -33.0 C (-27.4 F) |
| 1963 | -32.8 C (-27.0 F) |
| 1964 | -30.1 C (-22.2 F) |
| 1965 | -30.8 C (-23.4 F) |
| 1966 | -42.1 C (-43.8 F) |
| 1967 | -37.1 C (-34.8 F) |
| 1968 | -37.6 C (-35.7 F) |
| 1969 | -33.6 C (-28.5 F) |
| 1970 | -33.1 C (-27.6 F) |
| 1971 | -32.6 C (-26.7 F) |
| 1972 | -30.0 C (-22.0 F) |
| 1973 | -34.2 C (-29.6 F) |
| 1974 | -21.0 C (-5.8 F) |
| 1975 | -32.3 C (-26.1 F) |
| 1976 | -33.1 C (-27.6 F) |
| 1977 | -32.1 C (-25.8 F) |
| 1978 | -37.0 C (-34.6 F) |
| 1979 | -38.0 C (-36.4 F) |
| 1980 | -34.2 C (-29.6 F) |
| 1981 | -32.2 C (-26.0 F) |
| 1982 | -33.7 C (-28.7 F) |
| 1983 | -32.0 C (-25.6 F) |
| 1984 | -32.6 C (-26.7 F) |
| 1985 | -37.5 C (-35.5 F) |
| 1986 | -35.1 C (-31.2 F) |
| 1987 | -39.8 C (-39.6 F) |
| 1988 | -32.5 C (-26.5 F) |
| 1989 | -29.5 C (-21.1 F) |
| 1990 | -29.6 C (-21.3 F) |
| 1991 | -26.6 C (-15.9 F) |
| 1992 | -27.1 C (-16.8 F) |
| 1993 | -29.8 C (-21.6 F) |
| 1994 | -34.0 C (-29.2 F) |
| 1995 | -33.5 C (-28.3 F) |
| 1996 | -32.5 C (-26.5 F) |
| 1997 | -28.8 C (-19.8 F) |
| 1998 | -33.7 C (-28.7 F) |
| 1999 | -35.5 C (-31.9 F) |
| 2000 | -26.7 C (-16.1 F) |
| 2001 | -33.4 C (-28.1 F) |
| 2002 | -35.8 C (-32.4 F) |
| 2003 | -37.5 C (-35.5 F) |
| 2004 | -29.9 C (-21.8 F) |
| 2005 | -32.1 C (-25.8 F) |
| 2006 | -32.7 C (-26.9 F) |
| 2007 | -36.3 C (-33.3 F) |
| 2008 | -21.0 C (-5.8 F) |
| 2009 | -26.2 C (-15.2 F) |
| 2010 | -32.0 C (-25.6 F) |
| 2011 | -35.0 C (-31.0 F) |
| 2012 | -32.3 C (-26.1 F) |
| 2013 | -29.8 C (-21.6 F) |
| 2014 | -24.2 C (-11.6 F) |
| 2015 | -26.9 C (-16.4 F) |
| 2016 | -32.0 C (-25.6 F) |
| 2017 | -27.8 C (-18.0 F) |
| 2018 | -30.1 C (-22.2 F) |
| 2019 | -29.1 C (-20.4 F) |
| 2020 | -16.8 C (1.8 F) |
| 2021 | -28.9 C (-20.0 F) |
| 2022 | -27.2 C (-17.0 F) |
| 2023 | -24.6 C (-12.3 F) |
| 2024 | -31.5 C (-24.7 F) |
| 2025 | -22.8 C (-9.0 F) |
| 2026 | -28.8 C (-19.8 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1959 | 27.0 mm (1.1 in) |
| 1960 | 22.2 mm (0.9 in) |
| 1961 | 37.8 mm (1.5 in) |
| 1962 | 20.2 mm (0.8 in) |
| 1963 | 26.2 mm (1.0 in) |
| 1964 | 31.7 mm (1.2 in) |
| 1965 | 21.1 mm (0.8 in) |
| 1966 | 23.1 mm (0.9 in) |
| 1967 | 20.8 mm (0.8 in) |
| 1968 | 20.6 mm (0.8 in) |
| 1969 | 27.3 mm (1.1 in) |
| 1970 | 20.2 mm (0.8 in) |
| 1971 | 31.0 mm (1.2 in) |
| 1972 | 25.0 mm (1.0 in) |
| 1973 | 32.9 mm (1.3 in) |
| 1974 | 19.8 mm (0.8 in) |
| 1975 | 23.8 mm (0.9 in) |
| 1976 | 26.9 mm (1.1 in) |
| 1977 | 19.4 mm (0.8 in) |
| 1978 | 20.8 mm (0.8 in) |
| 1979 | 26.1 mm (1.0 in) |
| 1980 | 34.9 mm (1.4 in) |
| 1981 | 38.4 mm (1.5 in) |
| 1982 | 20.8 mm (0.8 in) |
| 1983 | 19.1 mm (0.8 in) |
| 1984 | 25.7 mm (1.0 in) |
| 1985 | 21.3 mm (0.8 in) |
| 1986 | 37.0 mm (1.5 in) |
| 1987 | 27.9 mm (1.1 in) |
| 1988 | 36.2 mm (1.4 in) |
| 1989 | 31.6 mm (1.2 in) |
| 1990 | 16.8 mm (0.7 in) |
| 1991 | 40.6 mm (1.6 in) |
| 1992 | 20.7 mm (0.8 in) |
| 1993 | 21.5 mm (0.8 in) |
| 1994 | 25.2 mm (1.0 in) |
| 1995 | 19.4 mm (0.8 in) |
| 1996 | 47.3 mm (1.9 in) |
| 1997 | 27.8 mm (1.1 in) |
| 1998 | 26.9 mm (1.1 in) |
| 1999 | 28.3 mm (1.1 in) |
| 2000 | 26.1 mm (1.0 in) |
| 2001 | 33.0 mm (1.3 in) |
| 2002 | 30.9 mm (1.2 in) |
| 2003 | 33.7 mm (1.3 in) |
| 2004 | 24.8 mm (1.0 in) |
| 2005 | 33.0 mm (1.3 in) |
| 2006 | 18.0 mm (0.7 in) |
| 2007 | 18.1 mm (0.7 in) |
| 2008 | 34.2 mm (1.3 in) |
| 2009 | 15.6 mm (0.6 in) |
| 2010 | 27.1 mm (1.1 in) |
| 2011 | 25.0 mm (1.0 in) |
| 2012 | 47.7 mm (1.9 in) |
| 2013 | 23.2 mm (0.9 in) |
| 2014 | 44.4 mm (1.7 in) |
| 2015 | 24.8 mm (1.0 in) |
| 2016 | 27.5 mm (1.1 in) |
| 2017 | 38.9 mm (1.5 in) |
| 2018 | 20.7 mm (0.8 in) |
| 2019 | 27.7 mm (1.1 in) |
| 2020 | 19.5 mm (0.8 in) |
| 2021 | 20.3 mm (0.8 in) |
| 2022 | 31.5 mm (1.2 in) |
| 2023 | 57.5 mm (2.3 in) |
| 2024 | 26.4 mm (1.0 in) |
| 2025 | 25.0 mm (1.0 in) |
| 2026 | 69.6 mm (2.7 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1959 | 54.1 mm (2.1 in) |
| 1960 | 39.2 mm (1.5 in) |
| 1961 | 81.4 mm (3.2 in) |
| 1962 | 45.0 mm (1.8 in) |
| 1963 | 39.5 mm (1.6 in) |
| 1964 | 43.2 mm (1.7 in) |
| 1965 | 50.8 mm (2.0 in) |
| 1966 | 50.2 mm (2.0 in) |
| 1967 | 37.6 mm (1.5 in) |
| 1968 | 48.8 mm (1.9 in) |
| 1969 | 37.4 mm (1.5 in) |
| 1970 | 42.2 mm (1.7 in) |
| 1971 | 50.7 mm (2.0 in) |
| 1972 | 43.2 mm (1.7 in) |
| 1973 | 46.2 mm (1.8 in) |
| 1974 | 45.2 mm (1.8 in) |
| 1975 | 37.4 mm (1.5 in) |
| 1976 | 56.5 mm (2.2 in) |
| 1977 | 36.6 mm (1.4 in) |
| 1978 | 48.0 mm (1.9 in) |
| 1979 | 64.3 mm (2.5 in) |
| 1980 | 62.7 mm (2.5 in) |
| 1981 | 57.2 mm (2.3 in) |
| 1982 | 47.7 mm (1.9 in) |
| 1983 | 34.9 mm (1.4 in) |
| 1984 | 57.2 mm (2.3 in) |
| 1985 | 34.1 mm (1.3 in) |
| 1986 | 47.4 mm (1.9 in) |
| 1987 | 63.6 mm (2.5 in) |
| 1988 | 73.3 mm (2.9 in) |
| 1989 | 61.7 mm (2.4 in) |
| 1990 | 47.1 mm (1.9 in) |
| 1991 | 65.7 mm (2.6 in) |
| 1992 | 39.0 mm (1.5 in) |
| 1993 | 37.4 mm (1.5 in) |
| 1994 | 41.9 mm (1.6 in) |
| 1995 | 34.4 mm (1.4 in) |
| 1996 | 65.2 mm (2.6 in) |
| 1997 | 55.1 mm (2.2 in) |
| 1998 | 63.6 mm (2.5 in) |
| 1999 | 55.2 mm (2.2 in) |
| 2000 | 45.7 mm (1.8 in) |
| 2001 | 69.3 mm (2.7 in) |
| 2002 | 66.9 mm (2.6 in) |
| 2003 | 52.2 mm (2.1 in) |
| 2004 | 45.6 mm (1.8 in) |
| 2005 | 79.0 mm (3.1 in) |
| 2006 | 52.0 mm (2.0 in) |
| 2007 | 41.9 mm (1.6 in) |
| 2008 | 59.4 mm (2.3 in) |
| 2009 | 37.4 mm (1.5 in) |
| 2010 | 72.4 mm (2.9 in) |
| 2011 | 58.9 mm (2.3 in) |
| 2012 | 102.6 mm (4.0 in) |
| 2013 | 40.8 mm (1.6 in) |
| 2014 | 55.3 mm (2.2 in) |
| 2015 | 45.8 mm (1.8 in) |
| 2016 | 41.2 mm (1.6 in) |
| 2017 | 46.1 mm (1.8 in) |
| 2018 | 40.4 mm (1.6 in) |
| 2019 | 38.8 mm (1.5 in) |
| 2020 | 42.3 mm (1.7 in) |
| 2021 | 50.4 mm (2.0 in) |
| 2022 | 50.7 mm (2.0 in) |
| 2023 | 95.4 mm (3.8 in) |
| 2024 | 38.6 mm (1.5 in) |
| 2025 | 37.0 mm (1.5 in) |
| 2026 | 72.7 mm (2.9 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1959 | 18 days |
| 1960 | 35 days |
| 1961 | 28 days |
| 1962 | 13 days |
| 1963 | 15 days |
| 1964 | 29 days |
| 1965 | 24 days |
| 1966 | 18 days |
| 1967 | 14 days |
| 1968 | 17 days |
| 1969 | 29 days |
| 1970 | 27 days |
| 1971 | 13 days |
| 1972 | 37 days |
| 1973 | 11 days |
| 1974 | 45 days |
| 1975 | 18 days |
| 1976 | 20 days |
| 1977 | 25 days |
| 1978 | 30 days |
| 1979 | 15 days |
| 1980 | 26 days |
| 1981 | 29 days |
| 1982 | 20 days |
| 1983 | 21 days |
| 1984 | 19 days |
| 1985 | 18 days |
| 1986 | 21 days |
| 1987 | 21 days |
| 1988 | 16 days |
| 1989 | 23 days |
| 1990 | 27 days |
| 1991 | 14 days |
| 1992 | 18 days |
| 1993 | 23 days |
| 1994 | 37 days |
| 1995 | 15 days |
| 1996 | 19 days |
| 1997 | 21 days |
| 1998 | 14 days |
| 1999 | 18 days |
| 2000 | 20 days |
| 2001 | 14 days |
| 2002 | 26 days |
| 2003 | 23 days |
| 2004 | 16 days |
| 2005 | 26 days |
| 2006 | 22 days |
| 2007 | 20 days |
| 2008 | 22 days |
| 2009 | 17 days |
| 2010 | 22 days |
| 2011 | 25 days |
| 2012 | 12 days |
| 2013 | 23 days |
| 2014 | 22 days |
| 2015 | 25 days |
| 2016 | 27 days |
| 2017 | 14 days |
| 2018 | 33 days |
| 2019 | 22 days |
| 2020 | 22 days |
| 2021 | 16 days |
| 2022 | 22 days |
| 2023 | 25 days |
| 2024 | 18 days |
| 2025 | 20 days |
| 2026 | 25 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
66 years with a frostAcross 66 years with a frost, the median last spring frost at Ahtari Myllymaki falls on 4 June and the median first autumn frost on 6 September, which leaves a median of 92 days between them.
In 1995 to 2025 the median growing season was 104 days. That is 14 days more than in 1959 to 1988.
Fitted over all years, the growing season changes by +2.6 days per decade at this station.
| Measure | Median, all years | Earliest period (1959 to 1988) | Recent period (1995 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 4 June | 4 June | 4 June | no change | -0.4 days per decade |
| First autumn frost | 6 September | 2 September | 13 September | 11 days later | +2.2 days per decade |
| Growing days | 92 days | 90 days | 104 days | 14 days more | +2.6 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
67 years, 1959 to 2025A day with at least 25.8 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 57.1 mm (2.2 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 25.8 mm (1.0 in) | |
| 5 years | 32.9 mm (1.3 in) | |
| 10 years | 38.1 mm (1.5 in) | |
| 25 years | 45.2 mm (1.8 in) | |
| 50 years | 51.0 mm (2.0 in) | |
| 100 years | 57.1 mm (2.2 in) | Longer than the 67 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, 67 years of values from 1959 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: 57.5 mm (2.3 in) in 2023; 47.7 mm (1.9 in) in 2012; 47.3 mm (1.9 in) in 1996.
Station Changes
3 suspected3 changes were suspected in the annual mean temperature of Ahtari Myllymaki, at 1968, 1995 and 2019. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1968 ran 0.3 C (0.5 F) lower than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1995 ran 0.1 C (0.2 F) lower than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2019 ran 0.4 C (0.8 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1968 | -0.3 | -0.5 | likely | 5 |
| 1995 | -0.1 | -0.2 | likely | 5 |
| 2019 | +0.4 | +0.8 | 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, Ahtari Myllymaki had a mean temperature of 4.4 C (39.9 F) and 649.4 mm (25.6 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Vantaa Helsinki-Vantaan Lentoa (Finland, 249 km away), Ruotsinpyhtaa Keitala (Finland, 261 km away) and Helsinki-Malmin Lentoasema (Finland, 257 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Vantaa Helsinki-Vantaan Lentoa | Finland | 249 km (155 mi) | 4.4 C (39.9 F) | 642.5 mm (25.3 in) | 0.52 |
| Ruotsinpyhtaa Keitala | Finland | 261 km (162 mi) | 4.2 C (39.5 F) | 709.9 mm (27.9 in) | 0.56 |
| Helsinki-Malmin Lentoasema | Finland | 257 km (160 mi) | 4.4 C (40.0 F) | 680.2 mm (26.8 in) | 0.57 |
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-14).