Ostrov Aion Weather Records (RSM00025042)
Record envelope, standing records and threshold days for Ostrov Aion (RSM00025042), Russia, with 77 years of record.
Key Facts for Ostrov Aion
- Ostrov Aion (RSM00025042) is a weather station in Russia at 69.93 latitude and 167.98 longitude, 13 m (43 ft) above sea level.
- The station reports from 1943 to 2019, 77 years of record.
- 1,464 records set at Ostrov Aion still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Ostrov Aion set a daily record high minimum temperature of 1.2 C (34.2 F) on 7 October 2018.
About the Station
- Location: Russia, 69.93 latitude, 167.98 longitude.
- Elevation: 13 m (43 ft).
- Period of record: 1943 to 2019, 77 years.
- Eligible elements: tmax, tmin, prcp.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 0.9 C (33.6 F) | -48.5 C (-55.3 F) | n/a | n/a |
| Feb | -0.5 C (31.1 F) | -51.3 C (-60.3 F) | n/a | n/a |
| Mar | 1.1 C (34.0 F) | -44.4 C (-47.9 F) | n/a | n/a |
| Apr | 4.9 C (40.8 F) | -39.0 C (-38.2 F) | n/a | n/a |
| May | 16.4 C (61.5 F) | -31.7 C (-25.1 F) | n/a | n/a |
| Jun | 29.2 C (84.6 F) | -12.0 C (10.4 F) | n/a | n/a |
| Jul | 30.6 C (87.1 F) | -4.2 C (24.4 F) | n/a | n/a |
| Aug | 26.7 C (80.1 F) | -7.2 C (19.0 F) | n/a | n/a |
| Sep | 21.0 C (69.8 F) | -15.4 C (4.3 F) | n/a | n/a |
| Oct | 13.3 C (55.9 F) | -34.5 C (-30.1 F) | n/a | n/a |
| Nov | 2.6 C (36.7 F) | -43.1 C (-45.6 F) | n/a | n/a |
| Dec | 4.4 C (39.9 F) | -45.3 C (-49.5 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1943 | 16 |
| 1944 | 23 |
| 1945 | 20 |
| 1946 | 6 |
| 1947 | 7 |
| 1948 | 8 |
| 1949 | 31 |
| 1950 | 39 |
| 1951 | 29 |
| 1952 | 15 |
| 1953 | 14 |
| 1954 | 28 |
| 1955 | 23 |
| 1956 | 15 |
| 1957 | 11 |
| 1958 | 8 |
| 1959 | 17 |
| 1960 | 6 |
| 1961 | 15 |
| 1962 | 24 |
| 1963 | 23 |
| 1964 | 33 |
| 1965 | 51 |
| 1966 | 32 |
| 1967 | 30 |
| 1968 | 22 |
| 1969 | 31 |
| 1970 | 25 |
| 1971 | 25 |
| 1972 | 15 |
| 1973 | 14 |
| 1974 | 26 |
| 1975 | 11 |
| 1977 | 17 |
| 1978 | 16 |
| 1979 | 29 |
| 1980 | 10 |
| 1981 | 4 |
| 1982 | 22 |
| 1983 | 26 |
| 1984 | 16 |
| 1985 | 25 |
| 1986 | 33 |
| 1987 | 8 |
| 1988 | 13 |
| 1989 | 13 |
| 1990 | 13 |
| 1991 | 8 |
| 1992 | 14 |
| 1993 | 13 |
| 1994 | 27 |
| 1995 | 10 |
| 1996 | 29 |
| 1997 | 16 |
| 1998 | 15 |
| 1999 | 15 |
| 2000 | 6 |
| 2001 | 10 |
| 2002 | 18 |
| 2003 | 16 |
| 2004 | 13 |
| 2005 | 19 |
| 2006 | 23 |
| 2007 | 47 |
| 2008 | 10 |
| 2009 | 11 |
| 2010 | 23 |
| 2011 | 18 |
| 2012 | 11 |
| 2013 | 14 |
| 2014 | 18 |
| 2015 | 7 |
| 2016 | 49 |
| 2017 | 27 |
| 2018 | 39 |
All-Time Record Progression
7 new records| Date | Kind | Detail |
|---|---|---|
| 1974-08-10 | Record high minimum temperature | Record high minimum temperature 15.0 C (59.0 F) |
| 1975-07-06 | Record high maximum temperature | Record high maximum temperature 30.2 C (86.4 F) |
| 1978-02-10 | Record low maximum temperature | Record low maximum temperature -46.7 C (-52.1 F) |
| 1978-02-10 | Record low minimum temperature | Record low minimum temperature -51.3 C (-60.3 F) |
| 1979-07-30 | Record daily precipitation | Record daily precipitation 30.3 mm (1.2 in) |
| 2010-07-08 | Record high maximum temperature | Record high maximum temperature 30.5 C (86.9 F) |
| 2015-07-04 | Record high maximum temperature | Record high maximum temperature 30.6 C (87.1 F) |
Wettest Day of Each Month
Jul: 30.3 mm (1.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 8.9 mm (0.35 in) | 11 January 1957 |
| Feb | 12.4 mm (0.5 in) | 20 February 1957 |
| Mar | 9.7 mm (0.38 in) | 2 March 1971 |
| Apr | 12.8 mm (0.5 in) | 9 April 1966 |
| May | 11.1 mm (0.4 in) | 25 May 1984 |
| Jun | 19.6 mm (0.8 in) | 28 June 1955 |
| Jul | 30.3 mm (1.2 in) | 30 July 1979 |
| Aug | 17.5 mm (0.7 in) | 23 August 1964 |
| Sep | 10.5 mm (0.4 in) | 1 September 1964 |
| Oct | 9.5 mm (0.37 in) | 17 October 1973 |
| Nov | 10.4 mm (0.4 in) | 10 November 1965 |
| Dec | 13.0 mm (0.5 in) | 21 December 1954 |
Period of Record Coverage
1943 to 2019| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1943 | 364 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 363 | 99% | Yes |
| 1946 | 363 | 99% | Yes |
| 1947 | 300 | 82% | No |
| 1948 | 365 | 100% | Yes |
| 1949 | 364 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 365 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 363 | 99% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 347 | 95% | Yes |
| 1958 | 332 | 91% | Yes |
| 1959 | 355 | 97% | Yes |
| 1960 | 360 | 98% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 349 | 96% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 352 | 96% | Yes |
| 1966 | 364 | 100% | Yes |
| 1967 | 364 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 357 | 98% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 363 | 99% | Yes |
| 1975 | 365 | 100% | Yes |
| 1977 | 364 | 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 | 363 | 99% | 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 | 365 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 59 | 16% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 7 October 2018 | Ostrov Aion, RU | daily high min | 1.2 C (34.2 F) | 0.1 C (0.2 F) | 1 year | 7 of 100 (Routine) |
| 5 October 2018 | Ostrov Aion, RU | daily high min | 1.3 C (34.3 F) | 0.6 C (1.1 F) | 3 years | 7 of 100 (Routine) |
| 4 October 2018 | Ostrov Aion, RU | daily high min | 2.5 C (36.5 F) | 2.0 C (3.6 F) | 1 year | 9 of 100 (Routine) |
| 2 October 2018 | Ostrov Aion, RU | daily high max | 8.9 C (48.0 F) | 1.8 C (3.2 F) | 73 years | 32 of 100 (Routine) |
| 2 October 2018 | Ostrov Aion, RU | daily high min | 4.1 C (39.4 F) | 1.1 C (2.0 F) | 73 years | 30 of 100 (Routine) |
| 1 October 2018 | Ostrov Aion, RU | monthly high max | 13.3 C (55.9 F) | 0.8 C (1.4 F) | 73 years | 40 of 100 (Notable) |
| 30 September 2018 | Ostrov Aion, RU | daily high max | 7.1 C (44.8 F) | 0.7 C (1.3 F) | 73 years | 30 of 100 (Routine) |
| 30 September 2018 | Ostrov Aion, RU | daily high min | 2.2 C (36.0 F) | 1.6 C (2.9 F) | 15 years | 16 of 100 (Routine) |
| 29 September 2018 | Ostrov Aion, RU | daily high max | 7.9 C (46.2 F) | 2.6 C (4.7 F) | 36 years | 23 of 100 (Routine) |
| 29 September 2018 | Ostrov Aion, RU | daily high min | 2.5 C (36.5 F) | 2.1 C (3.8 F) | 23 years | 19 of 100 (Routine) |
| 28 September 2018 | Ostrov Aion, RU | daily high min | 3.0 C (37.4 F) | 1.4 C (2.5 F) | 1 year | 11 of 100 (Routine) |
| 28 September 2018 | Ostrov Aion, RU | daily high max | 9.0 C (48.2 F) | 1.6 C (2.9 F) | 1 year | 10 of 100 (Routine) |
| 24 September 2018 | Ostrov Aion, RU | daily high min | 3.6 C (38.5 F) | 1.9 C (3.4 F) | 16 years | 16 of 100 (Routine) |
| 23 September 2018 | Ostrov Aion, RU | daily high min | 3.9 C (39.0 F) | 0.4 C (0.7 F) | 11 years | 11 of 100 (Routine) |
| 22 September 2018 | Ostrov Aion, RU | daily high min | 4.4 C (39.9 F) | 1.9 C (3.4 F) | 12 years | 15 of 100 (Routine) |
| 20 September 2018 | Ostrov Aion, RU | daily high min | 3.9 C (39.0 F) | 1.0 C (1.8 F) | 73 years | 32 of 100 (Routine) |
| 16 September 2018 | Ostrov Aion, RU | daily high max | 15.4 C (59.7 F) | 2.6 C (4.7 F) | 23 years | 19 of 100 (Routine) |
| 12 September 2018 | Ostrov Aion, RU | daily high max | 14.2 C (57.6 F) | 0.6 C (1.1 F) | 64 years | 27 of 100 (Routine) |
| 12 September 2018 | Ostrov Aion, RU | daily high min | 6.7 C (44.1 F) | 1.2 C (2.2 F) | 48 years | 24 of 100 (Routine) |
| 11 September 2018 | Ostrov Aion, RU | daily high min | 9.0 C (48.2 F) | 2.3 C (4.1 F) | 48 years | 28 of 100 (Routine) |
Climate Trend
73 complete years, 1943 to 2018| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1943 | -11.3 C | +0.88 C |
| 1944 | -11.8 C | +0.35 C |
| 1945 | -12.3 C | -0.18 C |
| 1946 | -13.5 C | -1.37 C |
| 1948 | -12.9 C | -0.71 C |
| 1949 | -14.5 C | -2.37 C |
| 1950 | -14.0 C | -1.80 C |
| 1951 | -12.6 C | -0.48 C |
| 1952 | -12.9 C | -0.71 C |
| 1953 | -12.5 C | -0.37 C |
| 1954 | -12.0 C | +0.19 C |
| 1955 | -12.9 C | -0.72 C |
| 1956 | -12.7 C | -0.59 C |
| 1957 | -12.7 C | -0.53 C |
| 1958 | -13.1 C | -0.96 C |
| 1959 | -11.3 C | +0.82 C |
| 1960 | -11.6 C | +0.60 C |
| 1961 | -12.9 C | -0.77 C |
| 1963 | -13.0 C | -0.87 C |
| 1964 | -13.6 C | -1.47 C |
| 1965 | -15.6 C | -3.49 C |
| 1966 | -13.5 C | -1.32 C |
| 1967 | -12.8 C | -0.63 C |
| 1968 | -11.9 C | +0.26 C |
| 1969 | -12.8 C | -0.67 C |
| 1970 | -12.3 C | -0.19 C |
| 1971 | -12.9 C | -0.77 C |
| 1972 | -12.8 C | -0.64 C |
| 1973 | -13.5 C | -1.31 C |
| 1974 | -12.2 C | -0.09 C |
| 1975 | -13.6 C | -1.40 C |
| 1977 | -12.3 C | -0.15 C |
| 1978 | -12.8 C | -0.67 C |
| 1979 | -13.9 C | -1.71 C |
| 1980 | -13.4 C | -1.22 C |
| 1981 | -12.3 C | -0.10 C |
| 1982 | -13.0 C | -0.83 C |
| 1983 | -14.2 C | -2.03 C |
| 1984 | -13.2 C | -1.00 C |
| 1985 | -12.9 C | -0.74 C |
| 1986 | -13.1 C | -0.93 C |
| 1987 | -13.8 C | -1.68 C |
| 1988 | -12.7 C | -0.57 C |
| 1989 | -11.3 C | +0.82 C |
| 1990 | -11.9 C | +0.26 C |
| 1991 | -10.8 C | +1.36 C |
| 1992 | -12.7 C | -0.52 C |
| 1993 | -12.9 C | -0.78 C |
| 1994 | -13.2 C | -1.03 C |
| 1995 | -10.6 C | +1.53 C |
| 1996 | -11.3 C | +0.83 C |
| 1997 | -12.0 C | +0.19 C |
| 1998 | -13.6 C | -1.45 C |
| 1999 | -14.2 C | -2.01 C |
| 2000 | -12.3 C | -0.18 C |
| 2001 | -11.9 C | +0.29 C |
| 2002 | -10.6 C | +1.56 C |
| 2003 | -10.2 C | +1.98 C |
| 2004 | -10.7 C | +1.48 C |
| 2005 | -10.8 C | +1.38 C |
| 2006 | -10.9 C | +1.24 C |
| 2007 | -7.7 C | +4.43 C |
| 2008 | -11.1 C | +1.05 C |
| 2009 | -10.6 C | +1.51 C |
| 2010 | -10.2 C | +2.00 C |
| 2011 | -10.8 C | +1.36 C |
| 2012 | -11.1 C | +1.08 C |
| 2013 | -11.4 C | +0.72 C |
| 2014 | -9.5 C | +2.62 C |
| 2015 | -11.0 C | +1.18 C |
| 2016 | -8.6 C | +3.51 C |
| 2017 | -7.9 C | +4.30 C |
| 2018 | -9.7 C | +2.47 C |
The annual mean temperature here has risen by 0.4 C (0.3 to 0.5) per decade over 1943 to 2018. In Fahrenheit: 0.7 F (0.5 to 0.9) per decade. The slope is a straight line fitted to 73 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 | 1943 to 2018 | 73 | Rise |
| Mean daily maximum | 0.3 C (0.2 to 0.5) per decade | 0.6 F (0.4 to 0.9) per decade | 1943 to 2018 | 73 | Rise |
| Mean daily minimum | 0.4 C (0.3 to 0.6) per decade | 0.8 F (0.6 to 1.0) per decade | 1943 to 2018 | 73 | 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
1943 to 2019| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 30.6 C (87.1 F) | 2015 | 24.6 C (76.3 F) | 76 |
| Coldest night (TNn) | -51.3 C (-60.3 F) | 1978 | -42.7 C (-44.9 F) | 76 |
| Wettest day (Rx1day) | 30.3 mm (1.2 in) | 1979 | 9.2 mm (0.36 in) | 76 |
| Wettest five days (Rx5day) | 47.3 mm (1.9 in) | 1954 | 15.8 mm (0.6 in) | 76 |
| Longest dry spell (CDD) | 147 days | 1999 | 51 days | 76 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1943 | 29.3 C (84.7 F) |
| 1944 | 24.9 C (76.8 F) |
| 1945 | 22.9 C (73.2 F) |
| 1946 | 21.9 C (71.4 F) |
| 1947 | 20.5 C (68.9 F) |
| 1948 | 20.9 C (69.6 F) |
| 1949 | 23.8 C (74.8 F) |
| 1950 | 20.3 C (68.5 F) |
| 1951 | 24.6 C (76.3 F) |
| 1952 | 29.0 C (84.2 F) |
| 1953 | 26.4 C (79.5 F) |
| 1954 | 24.1 C (75.4 F) |
| 1955 | 24.8 C (76.6 F) |
| 1956 | 25.5 C (77.9 F) |
| 1957 | 26.4 C (79.5 F) |
| 1958 | 22.6 C (72.7 F) |
| 1959 | 24.3 C (75.7 F) |
| 1960 | 28.2 C (82.8 F) |
| 1961 | 24.2 C (75.6 F) |
| 1962 | 24.7 C (76.5 F) |
| 1963 | 21.7 C (71.1 F) |
| 1964 | 22.9 C (73.2 F) |
| 1965 | 17.9 C (64.2 F) |
| 1966 | 25.1 C (77.2 F) |
| 1967 | 20.5 C (68.9 F) |
| 1968 | 22.5 C (72.5 F) |
| 1969 | 26.7 C (80.1 F) |
| 1970 | 24.6 C (76.3 F) |
| 1971 | 26.3 C (79.3 F) |
| 1972 | 24.6 C (76.3 F) |
| 1973 | 28.9 C (84.0 F) |
| 1974 | 27.4 C (81.3 F) |
| 1975 | 30.2 C (86.4 F) |
| 1977 | 28.4 C (83.1 F) |
| 1978 | 20.9 C (69.6 F) |
| 1979 | 23.8 C (74.8 F) |
| 1980 | 20.7 C (69.3 F) |
| 1981 | 26.3 C (79.3 F) |
| 1982 | 26.0 C (78.8 F) |
| 1983 | 23.5 C (74.3 F) |
| 1984 | 24.5 C (76.1 F) |
| 1985 | 23.1 C (73.6 F) |
| 1986 | 24.0 C (75.2 F) |
| 1987 | 24.8 C (76.6 F) |
| 1988 | 22.6 C (72.7 F) |
| 1989 | 29.2 C (84.6 F) |
| 1990 | 24.2 C (75.6 F) |
| 1991 | 27.4 C (81.3 F) |
| 1992 | 25.8 C (78.4 F) |
| 1993 | 28.9 C (84.0 F) |
| 1994 | 25.0 C (77.0 F) |
| 1995 | 23.3 C (73.9 F) |
| 1996 | 24.0 C (75.2 F) |
| 1997 | 24.1 C (75.4 F) |
| 1998 | 23.6 C (74.5 F) |
| 1999 | 26.6 C (79.9 F) |
| 2000 | 25.2 C (77.4 F) |
| 2001 | 22.8 C (73.0 F) |
| 2002 | 23.6 C (74.5 F) |
| 2003 | 26.1 C (79.0 F) |
| 2004 | 23.7 C (74.7 F) |
| 2005 | 26.6 C (79.9 F) |
| 2006 | 22.0 C (71.6 F) |
| 2007 | 26.7 C (80.1 F) |
| 2008 | 22.4 C (72.3 F) |
| 2009 | 24.7 C (76.5 F) |
| 2010 | 30.5 C (86.9 F) |
| 2011 | 23.3 C (73.9 F) |
| 2012 | 25.2 C (77.4 F) |
| 2013 | 23.2 C (73.8 F) |
| 2014 | 26.7 C (80.1 F) |
| 2015 | 30.6 C (87.1 F) |
| 2016 | 25.2 C (77.4 F) |
| 2017 | 22.9 C (73.2 F) |
| 2018 | 25.3 C (77.5 F) |
| 2019 | -11.5 C (11.3 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1943 | -41.7 C (-43.1 F) |
| 1944 | -43.5 C (-46.3 F) |
| 1945 | -42.6 C (-44.7 F) |
| 1946 | -42.3 C (-44.1 F) |
| 1947 | -37.4 C (-35.3 F) |
| 1948 | -42.4 C (-44.3 F) |
| 1949 | -43.8 C (-46.8 F) |
| 1950 | -43.6 C (-46.5 F) |
| 1951 | -45.9 C (-50.6 F) |
| 1952 | -47.4 C (-53.3 F) |
| 1953 | -46.3 C (-51.3 F) |
| 1954 | -43.5 C (-46.3 F) |
| 1955 | -41.1 C (-42.0 F) |
| 1956 | -40.9 C (-41.6 F) |
| 1957 | -47.0 C (-52.6 F) |
| 1958 | -41.9 C (-43.4 F) |
| 1959 | -42.5 C (-44.5 F) |
| 1960 | -43.1 C (-45.6 F) |
| 1961 | -42.2 C (-44.0 F) |
| 1962 | -41.6 C (-42.9 F) |
| 1963 | -44.0 C (-47.2 F) |
| 1964 | -48.5 C (-55.3 F) |
| 1965 | -43.0 C (-45.4 F) |
| 1966 | -49.7 C (-57.5 F) |
| 1967 | -43.1 C (-45.6 F) |
| 1968 | -48.0 C (-54.4 F) |
| 1969 | -45.0 C (-49.0 F) |
| 1970 | -44.1 C (-47.4 F) |
| 1971 | -44.8 C (-48.6 F) |
| 1972 | -44.5 C (-48.1 F) |
| 1973 | -43.5 C (-46.3 F) |
| 1974 | -45.1 C (-49.2 F) |
| 1975 | -41.5 C (-42.7 F) |
| 1977 | -44.2 C (-47.6 F) |
| 1978 | -51.3 C (-60.3 F) |
| 1979 | -44.5 C (-48.1 F) |
| 1980 | -42.1 C (-43.8 F) |
| 1981 | -41.4 C (-42.5 F) |
| 1982 | -42.3 C (-44.1 F) |
| 1983 | -40.4 C (-40.7 F) |
| 1984 | -42.9 C (-45.2 F) |
| 1985 | -41.9 C (-43.4 F) |
| 1986 | -43.1 C (-45.6 F) |
| 1987 | -45.2 C (-49.4 F) |
| 1988 | -43.3 C (-45.9 F) |
| 1989 | -41.8 C (-43.2 F) |
| 1990 | -43.9 C (-47.0 F) |
| 1991 | -42.8 C (-45.0 F) |
| 1992 | -39.4 C (-38.9 F) |
| 1993 | -42.7 C (-44.9 F) |
| 1994 | -42.7 C (-44.9 F) |
| 1995 | -41.7 C (-43.1 F) |
| 1996 | -40.9 C (-41.6 F) |
| 1997 | -41.9 C (-43.4 F) |
| 1998 | -43.0 C (-45.4 F) |
| 1999 | -45.0 C (-49.0 F) |
| 2000 | -43.2 C (-45.8 F) |
| 2001 | -40.1 C (-40.2 F) |
| 2002 | -42.6 C (-44.7 F) |
| 2003 | -40.7 C (-41.3 F) |
| 2004 | -40.8 C (-41.4 F) |
| 2005 | -43.5 C (-46.3 F) |
| 2006 | -41.2 C (-42.2 F) |
| 2007 | -40.1 C (-40.2 F) |
| 2008 | -41.2 C (-42.2 F) |
| 2009 | -42.0 C (-43.6 F) |
| 2010 | -43.5 C (-46.3 F) |
| 2011 | -39.7 C (-39.5 F) |
| 2012 | -42.7 C (-44.9 F) |
| 2013 | -43.1 C (-45.6 F) |
| 2014 | -40.8 C (-41.4 F) |
| 2015 | -41.7 C (-43.1 F) |
| 2016 | -38.7 C (-37.7 F) |
| 2017 | -38.6 C (-37.5 F) |
| 2018 | -39.5 C (-39.1 F) |
| 2019 | -40.8 C (-41.4 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1943 | 9.1 mm (0.36 in) |
| 1944 | 9.2 mm (0.36 in) |
| 1945 | 10.0 mm (0.4 in) |
| 1946 | 10.7 mm (0.4 in) |
| 1947 | 5.5 mm (0.22 in) |
| 1948 | 6.0 mm (0.24 in) |
| 1949 | 12.8 mm (0.5 in) |
| 1950 | 9.9 mm (0.39 in) |
| 1951 | 10.3 mm (0.4 in) |
| 1952 | 6.1 mm (0.24 in) |
| 1953 | 10.2 mm (0.4 in) |
| 1954 | 30.0 mm (1.2 in) |
| 1955 | 20.7 mm (0.8 in) |
| 1956 | 9.3 mm (0.37 in) |
| 1957 | 12.4 mm (0.5 in) |
| 1958 | 11.8 mm (0.5 in) |
| 1959 | 10.2 mm (0.4 in) |
| 1960 | 11.4 mm (0.4 in) |
| 1961 | 8.7 mm (0.34 in) |
| 1962 | 15.3 mm (0.6 in) |
| 1963 | 9.0 mm (0.35 in) |
| 1964 | 17.5 mm (0.7 in) |
| 1965 | 10.4 mm (0.4 in) |
| 1966 | 12.8 mm (0.5 in) |
| 1967 | 7.8 mm (0.31 in) |
| 1968 | 9.2 mm (0.36 in) |
| 1969 | 9.5 mm (0.37 in) |
| 1970 | 8.8 mm (0.35 in) |
| 1971 | 10.0 mm (0.4 in) |
| 1972 | 11.4 mm (0.4 in) |
| 1973 | 14.9 mm (0.6 in) |
| 1974 | 5.9 mm (0.23 in) |
| 1975 | 11.7 mm (0.5 in) |
| 1977 | 13.4 mm (0.5 in) |
| 1978 | 7.6 mm (0.30 in) |
| 1979 | 30.3 mm (1.2 in) |
| 1980 | 17.8 mm (0.7 in) |
| 1981 | 11.7 mm (0.5 in) |
| 1982 | 9.2 mm (0.36 in) |
| 1983 | 14.9 mm (0.6 in) |
| 1984 | 12.5 mm (0.5 in) |
| 1985 | 11.1 mm (0.4 in) |
| 1986 | 13.4 mm (0.5 in) |
| 1987 | 9.7 mm (0.38 in) |
| 1988 | 9.9 mm (0.39 in) |
| 1989 | 10.0 mm (0.4 in) |
| 1990 | 8.6 mm (0.34 in) |
| 1991 | 8.8 mm (0.35 in) |
| 1992 | 3.0 mm (0.12 in) |
| 1993 | 5.2 mm (0.20 in) |
| 1994 | 5.2 mm (0.20 in) |
| 1995 | 14.3 mm (0.6 in) |
| 1996 | 10.3 mm (0.4 in) |
| 1997 | 5.9 mm (0.23 in) |
| 1998 | 11.4 mm (0.4 in) |
| 1999 | 4.0 mm (0.16 in) |
| 2000 | 9.6 mm (0.38 in) |
| 2001 | 7.8 mm (0.31 in) |
| 2002 | 5.5 mm (0.22 in) |
| 2003 | 4.4 mm (0.17 in) |
| 2004 | 5.6 mm (0.22 in) |
| 2005 | 4.5 mm (0.18 in) |
| 2006 | 4.5 mm (0.18 in) |
| 2007 | 3.0 mm (0.12 in) |
| 2008 | 3.3 mm (0.13 in) |
| 2009 | 6.2 mm (0.24 in) |
| 2010 | 3.0 mm (0.12 in) |
| 2011 | 5.0 mm (0.20 in) |
| 2012 | 4.7 mm (0.19 in) |
| 2013 | 6.2 mm (0.24 in) |
| 2014 | 3.6 mm (0.14 in) |
| 2015 | 2.7 mm (0.11 in) |
| 2016 | 3.1 mm (0.12 in) |
| 2017 | 4.3 mm (0.17 in) |
| 2018 | 2.8 mm (0.11 in) |
| 2019 | 2.7 mm (0.11 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1943 | 10.3 mm (0.4 in) |
| 1944 | 11.2 mm (0.4 in) |
| 1945 | 14.6 mm (0.6 in) |
| 1946 | 25.5 mm (1.0 in) |
| 1947 | 8.8 mm (0.35 in) |
| 1948 | 9.6 mm (0.38 in) |
| 1949 | 19.0 mm (0.7 in) |
| 1950 | 17.6 mm (0.7 in) |
| 1951 | 20.3 mm (0.8 in) |
| 1952 | 12.5 mm (0.5 in) |
| 1953 | 16.1 mm (0.6 in) |
| 1954 | 47.3 mm (1.9 in) |
| 1955 | 33.1 mm (1.3 in) |
| 1956 | 18.7 mm (0.7 in) |
| 1957 | 21.6 mm (0.9 in) |
| 1958 | 24.9 mm (1.0 in) |
| 1959 | 14.0 mm (0.6 in) |
| 1960 | 15.5 mm (0.6 in) |
| 1961 | 20.7 mm (0.8 in) |
| 1962 | 19.3 mm (0.8 in) |
| 1963 | 17.1 mm (0.7 in) |
| 1964 | 31.5 mm (1.2 in) |
| 1965 | 18.8 mm (0.7 in) |
| 1966 | 20.0 mm (0.8 in) |
| 1967 | 18.9 mm (0.7 in) |
| 1968 | 16.4 mm (0.6 in) |
| 1969 | 13.0 mm (0.5 in) |
| 1970 | 16.1 mm (0.6 in) |
| 1971 | 21.4 mm (0.8 in) |
| 1972 | 28.2 mm (1.1 in) |
| 1973 | 33.8 mm (1.3 in) |
| 1974 | 11.4 mm (0.4 in) |
| 1975 | 22.6 mm (0.9 in) |
| 1977 | 24.2 mm (1.0 in) |
| 1978 | 20.3 mm (0.8 in) |
| 1979 | 34.8 mm (1.4 in) |
| 1980 | 21.4 mm (0.8 in) |
| 1981 | 33.6 mm (1.3 in) |
| 1982 | 12.3 mm (0.5 in) |
| 1983 | 20.1 mm (0.8 in) |
| 1984 | 20.2 mm (0.8 in) |
| 1985 | 14.3 mm (0.6 in) |
| 1986 | 27.7 mm (1.1 in) |
| 1987 | 15.3 mm (0.6 in) |
| 1988 | 14.7 mm (0.6 in) |
| 1989 | 14.5 mm (0.6 in) |
| 1990 | 15.3 mm (0.6 in) |
| 1991 | 13.7 mm (0.5 in) |
| 1992 | 4.3 mm (0.17 in) |
| 1993 | 8.7 mm (0.34 in) |
| 1994 | 16.6 mm (0.7 in) |
| 1995 | 19.9 mm (0.8 in) |
| 1996 | 15.2 mm (0.6 in) |
| 1997 | 10.5 mm (0.4 in) |
| 1998 | 20.9 mm (0.8 in) |
| 1999 | 8.0 mm (0.31 in) |
| 2000 | 18.8 mm (0.7 in) |
| 2001 | 17.1 mm (0.7 in) |
| 2002 | 16.1 mm (0.6 in) |
| 2003 | 11.8 mm (0.5 in) |
| 2004 | 17.2 mm (0.7 in) |
| 2005 | 10.5 mm (0.4 in) |
| 2006 | 11.0 mm (0.4 in) |
| 2007 | 7.9 mm (0.31 in) |
| 2008 | 10.2 mm (0.4 in) |
| 2009 | 9.3 mm (0.37 in) |
| 2010 | 6.9 mm (0.27 in) |
| 2011 | 9.5 mm (0.37 in) |
| 2012 | 12.4 mm (0.5 in) |
| 2013 | 13.4 mm (0.5 in) |
| 2014 | 6.2 mm (0.24 in) |
| 2015 | 7.2 mm (0.28 in) |
| 2016 | 7.7 mm (0.30 in) |
| 2017 | 12.5 mm (0.5 in) |
| 2018 | 8.1 mm (0.32 in) |
| 2019 | 5.7 mm (0.22 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1943 | 71 days |
| 1944 | 130 days |
| 1945 | 34 days |
| 1946 | 118 days |
| 1947 | 32 days |
| 1948 | 64 days |
| 1949 | 51 days |
| 1950 | 96 days |
| 1951 | 73 days |
| 1952 | 71 days |
| 1953 | 51 days |
| 1954 | 67 days |
| 1955 | 63 days |
| 1956 | 39 days |
| 1957 | 35 days |
| 1958 | 35 days |
| 1959 | 67 days |
| 1960 | 45 days |
| 1961 | 62 days |
| 1962 | 49 days |
| 1963 | 37 days |
| 1964 | 46 days |
| 1965 | 41 days |
| 1966 | 25 days |
| 1967 | 26 days |
| 1968 | 31 days |
| 1969 | 70 days |
| 1970 | 55 days |
| 1971 | 44 days |
| 1972 | 30 days |
| 1973 | 49 days |
| 1974 | 52 days |
| 1975 | 27 days |
| 1977 | 42 days |
| 1978 | 42 days |
| 1979 | 28 days |
| 1980 | 60 days |
| 1981 | 33 days |
| 1982 | 42 days |
| 1983 | 61 days |
| 1984 | 91 days |
| 1985 | 53 days |
| 1986 | 54 days |
| 1987 | 49 days |
| 1988 | 51 days |
| 1989 | 41 days |
| 1990 | 47 days |
| 1991 | 62 days |
| 1992 | 55 days |
| 1993 | 61 days |
| 1994 | 66 days |
| 1995 | 65 days |
| 1996 | 41 days |
| 1997 | 68 days |
| 1998 | 52 days |
| 1999 | 147 days |
| 2000 | 53 days |
| 2001 | 46 days |
| 2002 | 67 days |
| 2003 | 34 days |
| 2004 | 47 days |
| 2005 | 97 days |
| 2006 | 27 days |
| 2007 | 37 days |
| 2008 | 77 days |
| 2009 | 41 days |
| 2010 | 54 days |
| 2011 | 64 days |
| 2012 | 58 days |
| 2013 | 115 days |
| 2014 | 41 days |
| 2015 | 49 days |
| 2016 | 32 days |
| 2017 | 88 days |
| 2018 | 81 days |
| 2019 | 17 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
73 years with a frostAcross 73 years with a frost, the median last spring frost at Ostrov Aion falls on 29 June and the median first autumn frost on 2 July, which leaves a median of 3 days between them.
In 1989 to 2018 the median growing season was 11 days. That is 8 days more than in 1943 to 1974.
Fitted over all years, the growing season changes by +2.1 days per decade at this station.
| Measure | Median, all years | Earliest period (1943 to 1974) | Recent period (1989 to 2018) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 29 June | 30 June | 29 June | 1 day earlier | -0.2 days per decade |
| First autumn frost | 2 July | 2 July | 4 July | 2 days later | +1.9 days per decade |
| Growing days | 3 days | 3 days | 11 days | 8 days more | +2.1 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
74 years, 1943 to 2018A day with at least 8.6 mm (0.34 in) of rain is expected about once in 2 years. A day with at least 25.5 mm (1.0 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 8.6 mm (0.34 in) | |
| 5 years | 13.0 mm (0.5 in) | |
| 10 years | 15.9 mm (0.6 in) | |
| 25 years | 19.7 mm (0.8 in) | |
| 50 years | 22.6 mm (0.9 in) | |
| 100 years | 25.5 mm (1.0 in) | Longer than the 74 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, 74 years of values from 1943 to 2018.
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: 30.3 mm (1.2 in) in 1979; 30.0 mm (1.2 in) in 1954; 20.7 mm (0.8 in) in 1955.
Climate Twins
2004 to 2018 against 1961 to 1990Over 2004 to 2018, Ostrov Aion had a mean temperature of -10.1 C (13.7 F) and 109.8 mm (4.3 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Clinton Point (Canada, 2,585 km away), Mys Vankarem (Russia, 688 km away) and Iqaluit A (Canada, 4,520 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Clinton Point | Canada | 2,585 km (1,606 mi) | -11.0 C (12.1 F) | 173.8 mm (6.8 in) | 1.26 |
| Mys Vankarem | Russia | 688 km (428 mi) | -10.4 C (13.3 F) | 256.0 mm (10.1 in) | 1.66 |
| Iqaluit A | Canada | 4,520 km (2,809 mi) | -9.5 C (15.0 F) | 425.5 mm (16.8 in) | 1.72 |
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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2025-12-31).