Rome 2 NW Threshold Days by Year (USC00357310)
17 fixed thresholds counted per year at Rome 2 NW (USC00357310): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Rome 2 NW Thresholds
- Rome 2 NW: days with 10 mm (0.39 in) or more of precipitation in 59 years, most in 1963 with 8.
- Rome 2 NW: nights with a minimum temperature at or below 0 C (32 F) in 55 years, most in 2019 with 209.
- Rome 2 NW: nights with a minimum temperature at or below -10 C (14 F) in 55 years, most in 1959 with 69.
- Rome 2 NW: days with a maximum temperature at or above 30 C (86 F) in 51 years, most in 1988 with 103.
- 17 fixed thresholds have at least one qualifying day at Rome 2 NW.
Days at or above 30 C (86 F)
51 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1951 | 85 | 75.5 |
| 1959 | 66 | 75.5 |
| 1961 | 80 | 72.8 |
| 1963 | 75 | 72.8 |
| 1965 | 56 | 72.8 |
| 1969 | 80 | 72.8 |
| 1970 | 91 | 77.3 |
| 1971 | 64 | 77.3 |
| 1972 | 78 | 77.3 |
| 1974 | 97 | 77.3 |
| 1975 | 70 | 77.3 |
| 1976 | 55 | 77.3 |
| 1977 | 80 | 77.3 |
| 1979 | 83 | 77.3 |
| 1980 | 73 | 79.3 |
| 1981 | 83 | 79.3 |
| 1982 | 67 | 79.3 |
| 1983 | 61 | 79.3 |
| 1984 | 73 | 79.3 |
| 1986 | 82 | 79.3 |
| 1987 | 92 | 79.3 |
| 1988 | 103 | 79.3 |
| 1991 | 66 | 70.3 |
| 1992 | 82 | 70.3 |
| 1993 | 38 | 70.3 |
| 1994 | 92 | 70.3 |
| 1995 | 64 | 70.3 |
| 1997 | 69 | 70.3 |
| 1998 | 72 | 70.3 |
| 1999 | 79 | 70.3 |
| 2000 | 79 | 84 |
| 2001 | 90 | 84 |
| 2002 | 80 | 84 |
| 2003 | 102 | 84 |
| 2004 | 70 | 84 |
| 2005 | 76 | 84 |
| 2006 | 89 | 84 |
| 2007 | 94 | 84 |
| 2008 | 93 | 84 |
| 2009 | 67 | 84 |
| 2010 | 68 | 85.6 |
| 2011 | 75 | 85.6 |
| 2012 | 97 | 85.6 |
| 2013 | 93 | 85.6 |
| 2016 | 85 | 85.6 |
| 2017 | 98 | 85.6 |
| 2018 | 91 | 85.6 |
| 2019 | 78 | 85.6 |
| 2020 | 100 | 99 |
| 2025 | 102 | 99 |
| 2026 | 95 | 99 |
| Year | First date | Last date |
|---|---|---|
| 1951 | 1951-05-21 | 1951-09-27 |
| 1959 | 1959-06-02 | 1959-09-14 |
| 1961 | 1961-05-22 | 1961-10-05 |
| 1963 | 1963-05-18 | 1963-10-16 |
| 1965 | 1965-05-28 | 1965-10-09 |
| 1969 | 1969-05-09 | 1969-09-26 |
| 1970 | 1970-05-16 | 1970-10-04 |
| 1971 | 1971-06-07 | 1971-09-14 |
| 1972 | 1972-05-25 | 1972-09-18 |
| 1974 | 1974-05-25 | 1974-10-02 |
| 1975 | 1975-05-14 | 1975-10-05 |
| 1976 | 1976-05-12 | 1976-09-30 |
| 1977 | 1977-04-24 | 1977-09-13 |
| 1979 | 1979-05-20 | 1979-10-07 |
| 1980 | 1980-05-20 | 1980-10-07 |
| 1981 | 1981-04-30 | 1981-09-18 |
| 1982 | 1982-05-25 | 1982-09-23 |
| 1983 | 1983-05-24 | 1983-09-25 |
| 1984 | 1984-05-28 | 1984-10-07 |
| 1986 | 1986-05-25 | 1986-09-07 |
| 1987 | 1987-04-22 | 1987-10-03 |
| 1988 | 1988-04-12 | 1988-10-08 |
| 1991 | 1991-06-10 | 1991-10-15 |
| 1992 | 1992-04-29 | 1992-10-01 |
| 1993 | 1993-05-18 | 1993-10-03 |
| 1994 | 1994-04-20 | 1994-09-27 |
| 1995 | 1995-05-30 | 1995-09-16 |
| 1997 | 1997-05-10 | 1997-10-01 |
| 1998 | 1998-06-18 | 1998-09-29 |
| 1999 | 1999-05-23 | 1999-09-23 |
| 2000 | 2000-05-19 | 2000-09-16 |
| 2001 | 2001-05-11 | 2001-10-02 |
| 2002 | 2002-05-30 | 2002-09-24 |
| 2003 | 2003-05-22 | 2003-10-27 |
| 2004 | 2004-05-02 | 2004-09-28 |
| 2005 | 2005-05-27 | 2005-09-30 |
| 2006 | 2006-05-11 | 2006-09-30 |
| 2007 | 2007-04-28 | 2007-09-14 |
| 2008 | 2008-05-16 | 2008-10-01 |
| 2009 | 2009-04-21 | 2009-09-28 |
| 2010 | 2010-06-14 | 2010-10-02 |
| 2011 | 2011-06-23 | 2011-10-01 |
| 2012 | 2012-04-21 | 2012-09-29 |
| 2013 | 2013-05-10 | 2013-09-20 |
| 2016 | 2016-05-12 | 2016-09-29 |
| 2017 | 2017-05-04 | 2017-09-13 |
| 2018 | 2018-04-27 | 2018-09-28 |
| 2019 | 2019-05-12 | 2019-09-15 |
| 2020 | 2020-05-10 | 2020-10-07 |
| 2025 | 2025-05-09 | 2025-09-28 |
| 2026 | 2026-03-18 | 2026-09-25 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 51 | 103 | 1988 | 95 |
| 35 C (95 F): Days | 51 | 59 | 1970 | 50 |
| 40 C (104 F): Days | 31 | 8 | 2003 | 1 |
| 90 F (32.2 C): Days | 51 | 87 | 1988 | 71 |
| 100 F (37.8 C): Days | 48 | 27 | 2017 | 19 |
| 110 F (43.3 C): Days | 1 | 1 | 2002 | 1 |
| 0 C (32 F): Ice days (max | 50 | 33 | 1993 | 3 |
| 0 C (32 F): Frost days (min | 55 | 209 | 2019 | 102 |
| -10 C (14 F): Days with min | 55 | 69 | 1959 | 20 |
| -20 C (-4 F): Days with min | 35 | 21 | 2013 | 1 |
| -30 C (-22 F): Days with min | 4 | 2 | 1972 | 2 |
| 20 C (68 F): Tropical nights (min | 19 | 5 | 2010 | 6 |
| 25 C (77 F): Days with min | 1 | 0 | n/a | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 59 | 8 | 1963 | 1 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 19 | 1 | 1971 | 1 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 1 | 1 | 2007 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 12 | 4 | 1951 | 2 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1951.
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 (2026-10-17).