Leiter 9N Threshold Days by Year (USC00485506)
18 fixed thresholds counted per year at Leiter 9N (USC00485506): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Leiter 9N Thresholds
- Leiter 9N: nights with a minimum temperature at or below 0 C (32 F) in 61 years, most in 1970 with 202.
- Leiter 9N: nights with a minimum temperature at or below -10 C (14 F) in 61 years, most in 1978 with 74.
- Leiter 9N: nights with a minimum temperature at or below -20 C (-4 F) in 61 years, most in 1985 with 31.
- Leiter 9N: days with a maximum temperature at or above 30 C (86 F) in 60 years, most in 1988 with 87.
- 18 fixed thresholds have at least one qualifying day at Leiter 9N.
Days at or above 30 C (86 F)
60 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1965 | 24 | 48.6 |
| 1966 | 75 | 48.6 |
| 1967 | 54 | 48.6 |
| 1968 | 32 | 48.6 |
| 1969 | 58 | 48.6 |
| 1970 | 68 | 52.6 |
| 1971 | 66 | 52.6 |
| 1972 | 46 | 52.6 |
| 1973 | 47 | 52.6 |
| 1974 | 56 | 52.6 |
| 1975 | 39 | 52.6 |
| 1976 | 62 | 52.6 |
| 1977 | 38 | 52.6 |
| 1978 | 51 | 52.6 |
| 1981 | 52 | 59.6 |
| 1982 | 54 | 59.6 |
| 1983 | 61 | 59.6 |
| 1984 | 66 | 59.6 |
| 1985 | 51 | 59.6 |
| 1986 | 60 | 59.6 |
| 1987 | 42 | 59.6 |
| 1988 | 87 | 59.6 |
| 1989 | 63 | 59.6 |
| 1990 | 59 | 50.4 |
| 1991 | 58 | 50.4 |
| 1992 | 41 | 50.4 |
| 1993 | 16 | 50.4 |
| 1994 | 65 | 50.4 |
| 1995 | 47 | 50.4 |
| 1996 | 53 | 50.4 |
| 1997 | 46 | 50.4 |
| 1998 | 64 | 50.4 |
| 1999 | 55 | 50.4 |
| 2000 | 68 | 63.7 |
| 2001 | 77 | 63.7 |
| 2002 | 64 | 63.7 |
| 2003 | 76 | 63.7 |
| 2004 | 49 | 63.7 |
| 2005 | 66 | 63.7 |
| 2006 | 74 | 63.7 |
| 2007 | 64 | 63.7 |
| 2008 | 46 | 63.7 |
| 2009 | 53 | 63.7 |
| 2010 | 52 | 58.7 |
| 2011 | 69 | 58.7 |
| 2012 | 81 | 58.7 |
| 2013 | 65 | 58.7 |
| 2014 | 47 | 58.7 |
| 2015 | 63 | 58.7 |
| 2016 | 66 | 58.7 |
| 2017 | 60 | 58.7 |
| 2018 | 49 | 58.7 |
| 2019 | 35 | 58.7 |
| 2020 | 68 | 59 |
| 2021 | 72 | 59 |
| 2022 | 68 | 59 |
| 2023 | 40 | 59 |
| 2024 | 74 | 59 |
| 2025 | 65 | 59 |
| 2026 | 26 | 59 |
| Year | First date | Last date |
|---|---|---|
| 1965 | 1965-07-07 | 1965-08-28 |
| 1966 | 1966-05-06 | 1966-09-23 |
| 1967 | 1967-07-05 | 1967-09-29 |
| 1968 | 1968-07-04 | 1968-09-11 |
| 1969 | 1969-05-26 | 1969-09-20 |
| 1970 | 1970-06-22 | 1970-10-04 |
| 1971 | 1971-06-18 | 1971-09-13 |
| 1972 | 1972-05-17 | 1972-09-18 |
| 1973 | 1973-05-31 | 1973-08-30 |
| 1974 | 1974-06-17 | 1974-09-26 |
| 1975 | 1975-06-24 | 1975-10-03 |
| 1976 | 1976-06-02 | 1976-10-02 |
| 1977 | 1977-06-01 | 1977-09-14 |
| 1978 | 1978-05-15 | 1978-09-28 |
| 1981 | 1981-05-01 | 1981-09-19 |
| 1982 | 1982-06-22 | 1982-09-09 |
| 1983 | 1983-06-10 | 1983-09-26 |
| 1984 | 1984-05-15 | 1984-09-20 |
| 1985 | 1985-05-02 | 1985-09-14 |
| 1986 | 1986-05-03 | 1986-08-30 |
| 1987 | 1987-05-08 | 1987-09-02 |
| 1988 | 1988-05-13 | 1988-09-16 |
| 1989 | 1989-04-22 | 1989-09-30 |
| 1990 | 1990-06-10 | 1990-09-25 |
| 1991 | 1991-06-11 | 1991-10-16 |
| 1992 | 1992-05-06 | 1992-10-03 |
| 1993 | 1993-05-26 | 1993-10-05 |
| 1994 | 1994-05-27 | 1994-09-28 |
| 1995 | 1995-06-14 | 1995-09-05 |
| 1996 | 1996-06-08 | 1996-09-04 |
| 1997 | 1997-07-06 | 1997-10-02 |
| 1998 | 1998-05-26 | 1998-09-18 |
| 1999 | 1999-06-19 | 1999-09-23 |
| 2000 | 2000-06-05 | 2000-09-17 |
| 2001 | 2001-05-12 | 2001-10-01 |
| 2002 | 2002-05-30 | 2002-09-16 |
| 2003 | 2003-05-25 | 2003-10-17 |
| 2004 | 2004-05-08 | 2004-09-18 |
| 2005 | 2005-06-15 | 2005-10-01 |
| 2006 | 2006-05-18 | 2006-09-14 |
| 2007 | 2007-05-12 | 2007-09-22 |
| 2008 | 2008-06-25 | 2008-09-25 |
| 2009 | 2009-05-18 | 2009-09-29 |
| 2010 | 2010-06-24 | 2010-10-04 |
| 2011 | 2011-06-05 | 2011-10-03 |
| 2012 | 2012-04-23 | 2012-09-16 |
| 2013 | 2013-05-13 | 2013-09-21 |
| 2014 | 2014-07-03 | 2014-09-26 |
| 2015 | 2015-06-07 | 2015-10-10 |
| 2016 | 2016-06-07 | 2016-09-11 |
| 2017 | 2017-06-01 | 2017-09-13 |
| 2018 | 2018-05-26 | 2018-09-15 |
| 2019 | 2019-06-27 | 2019-09-17 |
| 2020 | 2020-05-31 | 2020-09-24 |
| 2021 | 2021-06-03 | 2021-10-05 |
| 2022 | 2022-06-17 | 2022-09-28 |
| 2023 | 2023-07-01 | 2023-09-03 |
| 2024 | 2024-06-11 | 2024-09-30 |
| 2025 | 2025-05-11 | 2025-10-03 |
| 2026 | 2026-05-11 | 2026-08-18 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 60 | 87 | 1988 | 26 |
| 35 C (95 F): Days | 60 | 41 | 1988 | 15 |
| 40 C (104 F): Days | 20 | 10 | 2006 | 4 |
| 90 F (32.2 C): Days | 60 | 62 | 1988 | 21 |
| 100 F (37.8 C): Days | 52 | 23 | 2006 | 7 |
| 110 F (43.3 C): Days | 1 | 3 | 2006 | 3 |
| 0 C (32 F): Ice days (max | 60 | 69 | 1978 | 12 |
| 0 C (32 F): Frost days (min | 61 | 202 | 1970 | 92 |
| -10 C (14 F): Days with min | 61 | 74 | 1978 | 15 |
| -20 C (-4 F): Days with min | 61 | 31 | 1985 | 2 |
| -30 C (-22 F): Days with min | 25 | 7 | 1972 | 1 |
| 20 C (68 F): Tropical nights (min | 42 | 8 | 2003 | 4 |
| 25 C (77 F): Days with min | 1 | 1 | 2020 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 59 | 18 | 2013 | 6 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 47 | 7 | 2007 | 7 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 4 | 2 | 1978 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 52 | 7 | 1977 | 2 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 11 | 2 | 2005 | 2 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1965.
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 (2026-10-12).