Aldan Threshold Days by Year (RSM00031004)
13 fixed thresholds counted per year at Aldan (RSM00031004): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Aldan Thresholds
- Aldan: days with a maximum temperature at or below 0 C (32 F) in 82 years, most in 1987 with 209.
- Aldan: nights with a minimum temperature at or below 0 C (32 F) in 82 years, most in 1980 with 257.
- Aldan: nights with a minimum temperature at or below -10 C (14 F) in 82 years, most in 1987 with 195.
- Aldan: nights with a minimum temperature at or below -20 C (-4 F) in 82 years, most in 1952 with 145.
- 13 fixed thresholds have at least one qualifying day at Aldan.
Days at or above 30 C (86 F)
66 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1937 | 2 | 2.5 |
| 1939 | 3 | 2.5 |
| 1940 | 1 | 3.5 |
| 1941 | 8 | 3.5 |
| 1942 | 7 | 3.5 |
| 1943 | 2 | 3.5 |
| 1944 | 1 | 3.5 |
| 1945 | 1 | 3.5 |
| 1946 | 2 | 3.5 |
| 1947 | 3 | 3.5 |
| 1948 | 4 | 3.5 |
| 1949 | 6 | 3.5 |
| 1951 | 2 | 3.8 |
| 1952 | 6 | 3.8 |
| 1953 | 2 | 3.8 |
| 1954 | 16 | 3.8 |
| 1955 | 2 | 3.8 |
| 1956 | 2 | 3.8 |
| 1957 | 1 | 3.8 |
| 1958 | 1 | 3.8 |
| 1959 | 2 | 3.8 |
| 1960 | 3 | 3.1 |
| 1961 | 4 | 3.1 |
| 1962 | 2 | 3.1 |
| 1963 | 2 | 3.1 |
| 1966 | 2 | 3.1 |
| 1967 | 1 | 3.1 |
| 1968 | 6 | 3.1 |
| 1969 | 5 | 3.1 |
| 1970 | 18 | 5 |
| 1974 | 3 | 5 |
| 1975 | 1 | 5 |
| 1976 | 2 | 5 |
| 1977 | 1 | 5 |
| 1980 | 7 | 4 |
| 1982 | 1 | 4 |
| 1983 | 1 | 4 |
| 1985 | 2 | 4 |
| 1986 | 11 | 4 |
| 1987 | 1 | 4 |
| 1988 | 5 | 4 |
| 1990 | 1 | 3.9 |
| 1991 | 3 | 3.9 |
| 1992 | 1 | 3.9 |
| 1993 | 3 | 3.9 |
| 1995 | 8 | 3.9 |
| 1996 | 7 | 3.9 |
| 1997 | 2 | 3.9 |
| 1998 | 7 | 3.9 |
| 1999 | 3 | 3.9 |
| 2001 | 2 | 3.7 |
| 2002 | 6 | 3.7 |
| 2004 | 1 | 3.7 |
| 2006 | 1 | 3.7 |
| 2007 | 1 | 3.7 |
| 2008 | 14 | 3.7 |
| 2009 | 1 | 3.7 |
| 2010 | 1 | 5.4 |
| 2011 | 14 | 5.4 |
| 2012 | 4 | 5.4 |
| 2013 | 2 | 5.4 |
| 2014 | 2 | 5.4 |
| 2015 | 11 | 5.4 |
| 2017 | 7 | 5.4 |
| 2018 | 2 | 5.4 |
| 2025 | 1 | 1 |
| Year | First date | Last date |
|---|---|---|
| 1937 | 1937-08-07 | 1937-08-08 |
| 1939 | 1939-07-08 | 1939-08-16 |
| 1940 | 1940-07-11 | 1940-07-11 |
| 1941 | 1941-07-03 | 1941-08-08 |
| 1942 | 1942-07-09 | 1942-07-15 |
| 1943 | 1943-07-15 | 1943-07-16 |
| 1944 | 1944-07-04 | 1944-07-04 |
| 1945 | 1945-07-19 | 1945-07-19 |
| 1946 | 1946-06-25 | 1946-07-29 |
| 1947 | 1947-07-06 | 1947-07-10 |
| 1948 | 1948-07-02 | 1948-07-14 |
| 1949 | 1949-06-25 | 1949-08-02 |
| 1951 | 1951-07-21 | 1951-07-22 |
| 1952 | 1952-07-12 | 1952-08-05 |
| 1953 | 1953-06-27 | 1953-06-28 |
| 1954 | 1954-06-26 | 1954-08-07 |
| 1955 | 1955-07-13 | 1955-07-14 |
| 1956 | 1956-07-28 | 1956-08-01 |
| 1957 | 1957-08-04 | 1957-08-04 |
| 1958 | 1958-08-05 | 1958-08-05 |
| 1959 | 1959-07-08 | 1959-07-09 |
| 1960 | 1960-07-11 | 1960-07-13 |
| 1961 | 1961-07-28 | 1961-07-31 |
| 1962 | 1962-06-21 | 1962-07-25 |
| 1963 | 1963-07-22 | 1963-07-23 |
| 1966 | 1966-06-27 | 1966-06-28 |
| 1967 | 1967-07-27 | 1967-07-27 |
| 1968 | 1968-06-19 | 1968-07-13 |
| 1969 | 1969-08-01 | 1969-08-06 |
| 1970 | 1970-06-25 | 1970-07-23 |
| 1974 | 1974-07-15 | 1974-07-17 |
| 1975 | 1975-08-07 | 1975-08-07 |
| 1976 | 1976-07-17 | 1976-07-18 |
| 1977 | 1977-07-13 | 1977-07-13 |
| 1980 | 1980-07-12 | 1980-07-31 |
| 1982 | 1982-07-28 | 1982-07-28 |
| 1983 | 1983-07-07 | 1983-07-07 |
| 1985 | 1985-06-25 | 1985-07-02 |
| 1986 | 1986-07-05 | 1986-08-09 |
| 1987 | 1987-08-15 | 1987-08-15 |
| 1988 | 1988-07-21 | 1988-07-26 |
| 1990 | 1990-07-03 | 1990-07-03 |
| 1991 | 1991-07-05 | 1991-07-16 |
| 1992 | 1992-06-17 | 1992-06-17 |
| 1993 | 1993-06-19 | 1993-08-05 |
| 1995 | 1995-06-19 | 1995-08-06 |
| 1996 | 1996-06-18 | 1996-08-13 |
| 1997 | 1997-07-16 | 1997-07-21 |
| 1998 | 1998-06-19 | 1998-08-05 |
| 1999 | 1999-07-03 | 1999-07-18 |
| 2001 | 2001-07-23 | 2001-07-26 |
| 2002 | 2002-07-01 | 2002-07-06 |
| 2004 | 2004-07-10 | 2004-07-10 |
| 2006 | 2006-08-02 | 2006-08-02 |
| 2007 | 2007-07-01 | 2007-07-01 |
| 2008 | 2008-06-12 | 2008-07-27 |
| 2009 | 2009-07-27 | 2009-07-27 |
| 2010 | 2010-07-22 | 2010-07-22 |
| 2011 | 2011-06-13 | 2011-07-28 |
| 2012 | 2012-06-18 | 2012-07-14 |
| 2013 | 2013-06-23 | 2013-07-02 |
| 2014 | 2014-06-21 | 2014-06-22 |
| 2015 | 2015-06-22 | 2015-08-26 |
| 2017 | 2017-06-22 | 2017-08-15 |
| 2018 | 2018-07-09 | 2018-07-27 |
| 2025 | 2025-06-26 | 2025-06-26 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 66 | 18 | 1970 | 1 |
| 35 C (95 F): Days | 1 | 1 | 1969 | 1 |
| 90 F (32.2 C): Days | 24 | 5 | 1970 | 1 |
| 0 C (32 F): Ice days (max | 82 | 209 | 1987 | 81 |
| 0 C (32 F): Frost days (min | 82 | 257 | 1980 | 83 |
| -10 C (14 F): Days with min | 82 | 195 | 1987 | 60 |
| -20 C (-4 F): Days with min | 82 | 145 | 1952 | 48 |
| -30 C (-22 F): Days with min | 82 | 90 | 1947 | 22 |
| -40 C (-40 F): Days with min | 75 | 32 | 1952 | 1 |
| 20 C (68 F): Tropical nights (min | 9 | 3 | 1954 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 82 | 28 | 2013 | 10 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 75 | 7 | 2005 | 1 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 11 | 4 | 1943 | 2 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1937.
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). Threshold counts are computed by this site.
Data as of . Last revised (2025-12-31).