Bologna Threshold Days by Year

8 fixed thresholds counted per year at Bologna (ITE00100550): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Bologna Thresholds

Bologna: days with 10 mm (0.39 in) or more of precipitation in 195 years, most in 1869 with 41.
Bologna: days with 25 mm (0.98 in) or more of precipitation in 191 years, most in 1876 with 15.
Bologna: nights with a minimum temperature at or below 0 C (32 F) in 190 years, most in 1858 with 99.
Bologna: nights with a minimum temperature at or above 20 C (68 F) in 190 years, most in 1822 with 90.
8 fixed thresholds have at least one qualifying day at Bologna.

Nights at or below 0 C (32 F)

190 years with a qualifying day

Days per year at Bologna with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 99 in 1858.

Nights at or below 0 C (32 F) per year at Bologna
Year	Days	Decade average
1814	46	38.2
1815	37	38.2
1816	66	38.2
1817	16	38.2
1818	31	38.2
1819	33	38.2
1820	41	38.6
1821	38	38.6
1822	23	38.6
1823	45	38.6
1824	29	38.6
1825	32	38.6
1826	25	38.6
1827	40	38.6
1828	38	38.6
1829	75	38.6
1830	58	46.5
1831	36	46.5
1832	50	46.5
1833	32	46.5
1834	34	46.5
1835	67	46.5
1836	50	46.5
1837	45	46.5
1838	56	46.5
1839	37	46.5
1840	57	42.1
1841	41	42.1
1842	51	42.1
1843	26	42.1
1844	55	42.1
1845	34	42.1
1846	42	42.1
1847	38	42.1
1848	41	42.1
1849	36	42.1
1850	41	62.7
1851	41	62.7
1852	41	62.7
1853	67	62.7
1854	61	62.7
1855	72	62.7
1856	51	62.7
1857	89	62.7
1858	99	62.7
1859	65	62.7
1860	89	54.2
1861	74	54.2
1862	63	54.2
1863	38	54.2
1864	71	54.2
1865	74	54.2
1866	25	54.2
1867	31	54.2
1868	46	54.2
1869	31	54.2
1870	61	54
1871	69	54
1872	21	54
1873	28	54
1874	59	54
1875	75	54
1876	50	54
1877	48	54
1878	72	54
1879	57	54
1880	38	40.9
1881	27	40.9
1882	25	40.9
1883	39	40.9
1884	31	40.9
1885	36	40.9
1886	47	40.9
1887	44	40.9
1888	64	40.9
1889	58	40.9
1890	59	52.6
1891	61	52.6
1892	65	52.6
1893	54	52.6
1894	44	52.6
1895	80	52.6
1896	57	52.6
1897	36	52.6
1898	31	52.6
1899	39	52.6
1900	28	30.8
1901	49	30.8
1902	28	30.8
1903	19	30.8
1904	11	30.8
1905	46	30.8
1906	27	30.8
1907	37	30.8
1908	28	30.8
1909	35	30.8
1910	18	26
1911	30	26
1912	13	26
1913	25	26
1914	33	26
1915	22	26
1916	12	26
1917	52	26
1918	39	26
1919	16	26
1920	4	25.4
1921	12	25.4
1922	34	25.4
1923	21	25.4
1924	29	25.4
1925	29	25.4
1926	30	25.4
1927	25	25.4
1928	16	25.4
1929	54	25.4
1930	17	26.1
1931	27	26.1
1932	33	26.1
1933	39	26.1
1934	21	26.1
1935	44	26.1
1936	12	26.1
1937	18	26.1
1938	33	26.1
1939	17	26.1
1940	62	51.7
1941	36	51.7
1942	63	51.7
1943	27	51.7
1944	43	51.7
1945	50	51.7
1946	51	51.7
1947	78	51.7
1948	54	51.7
1949	53	51.7
1950	34	38.9
1951	20	38.9
1952	48	38.9
1953	45	38.9
1954	62	38.9
1955	21	38.9
1956	58	38.9
1957	28	38.9
1958	45	38.9
1959	28	38.9
1960	39	42.8
1961	33	42.8
1962	43	42.8
1963	61	42.8
1964	43	42.8
1965	36	42.8
1966	40	42.8
1967	44	42.8
1968	35	42.8
1969	54	42.8
1970	43	27.6
1971	41	27.6
1972	13	27.6
1973	29	27.6
1974	11	27.6
1975	19	27.6
1976	37	27.6
1977	22	27.6
1978	32	27.6
1979	29	27.6
1980	25	30
1981	37	30
1982	27	30
1983	30	30
1984	24	30
1985	43	30
1986	32	30
1987	41	30
1988	10	30
1989	31	30
1990	27	26.5
1991	53	26.5
1992	40	26.5
1993	29	26.5
1994	8	26.5
1995	23	26.5
1996	33	26.5
1997	10	26.5
1998	16	26.5
1999	26	26.5
2000	14	18
2001	25	18
2002	15	18
2003	18	18

For each year, a bar from the first to the last day at Bologna meeting 0 C (32 F).

First to last qualifying date each year at Bologna
Year	First date	Last date
1814	1814-01-02	1814-12-09
1815	1815-01-05	1815-12-31
1816	1816-01-01	1816-12-31
1817	1817-01-09	1817-12-31
1818	1818-01-01	1818-12-31
1819	1819-01-01	1819-12-31
1820	1820-01-01	1820-12-31
1821	1821-01-01	1821-12-24
1822	1822-01-01	1822-12-31
1823	1823-01-01	1823-12-30
1824	1824-01-01	1824-12-27
1825	1825-01-01	1825-03-21
1826	1826-01-10	1826-12-30
1827	1827-01-16	1827-12-31
1828	1828-01-01	1828-12-23
1829	1829-01-01	1829-12-31
1830	1830-01-01	1830-12-30
1831	1831-01-08	1831-12-31
1832	1832-01-01	1832-12-31
1833	1833-01-01	1833-12-27
1834	1834-01-06	1834-12-30
1835	1835-01-03	1835-12-31
1836	1836-01-01	1836-12-31
1837	1837-01-01	1837-12-31
1838	1838-01-01	1838-12-28
1839	1839-01-02	1839-03-17
1840	1840-01-08	1840-12-31
1841	1841-01-01	1841-03-03
1842	1842-01-02	1842-12-24
1843	1843-01-04	1843-12-26
1844	1844-01-04	1844-12-28
1845	1845-01-07	1845-12-17
1846	1846-01-03	1846-12-31
1847	1847-01-01	1847-12-25
1848	1848-01-05	1848-12-31
1849	1849-01-01	1849-12-31
1850	1850-01-01	1850-12-29
1851	1851-01-04	1851-12-31
1852	1852-01-01	1852-12-31
1853	1853-01-01	1853-12-31
1854	1854-01-01	1854-12-31
1855	1855-01-01	1855-12-31
1856	1856-01-01	1856-12-31
1857	1857-01-01	1857-12-31
1858	1858-01-01	1858-12-31
1859	1859-01-01	1859-12-31
1860	1860-01-01	1860-12-31
1861	1861-01-01	1861-12-31
1862	1862-01-01	1862-12-31
1863	1863-01-13	1863-12-31
1864	1864-01-01	1864-12-31
1865	1865-01-01	1865-12-30
1866	1866-01-01	1866-12-31
1867	1867-01-01	1867-12-31
1868	1868-01-01	1868-12-29
1869	1869-01-11	1869-12-31
1870	1870-01-01	1870-12-31
1871	1871-01-01	1871-12-31
1872	1872-01-01	1872-12-25
1873	1873-01-12	1873-12-31
1874	1874-01-01	1874-12-31
1875	1875-01-01	1875-12-31
1876	1876-01-01	1876-12-31
1877	1877-01-24	1877-12-31
1878	1878-01-01	1878-12-30
1879	1879-01-03	1879-12-31
1880	1880-01-01	1880-12-15
1881	1881-01-07	1881-02-15
1882	1882-01-03	1882-12-07
1883	1883-01-05	1883-12-27
1884	1884-01-01	1884-12-21
1885	1885-01-09	1885-12-30
1886	1886-01-01	1886-12-30
1887	1887-01-02	1887-12-31
1888	1888-01-01	1888-12-20
1889	1889-01-03	1889-12-30
1890	1890-01-12	1890-12-31
1891	1891-01-01	1891-12-31
1892	1892-01-01	1892-12-31
1893	1893-01-01	1893-12-31
1894	1894-01-01	1894-12-31
1895	1895-01-01	1895-12-31
1896	1896-01-02	1896-12-31
1897	1897-01-01	1897-12-31
1898	1898-01-05	1898-12-30
1899	1899-01-06	1899-12-31
1900	1900-01-01	1900-12-31
1901	1901-01-03	1901-12-17
1902	1902-01-11	1902-12-28
1903	1903-01-16	1903-12-30
1904	1904-02-27	1904-12-31
1905	1905-01-01	1905-12-31
1906	1906-01-01	1906-12-31
1907	1907-01-01	1907-03-05
1908	1908-01-03	1908-12-31
1909	1909-01-01	1909-12-03
1910	1910-01-08	1910-12-27
1911	1911-01-02	1911-12-26
1912	1912-01-02	1912-02-05
1913	1913-01-08	1913-12-28
1914	1914-01-01	1914-12-19
1915	1915-01-11	1915-12-28
1916	1916-01-17	1916-02-22
1917	1917-01-01	1917-12-31
1918	1918-01-01	1918-12-04
1919	1919-01-23	1919-12-22
1920	1920-02-07	1920-12-17
1921	1921-01-05	1921-12-29
1922	1922-01-07	1922-12-13
1923	1923-01-15	1923-12-31
1924	1924-01-01	1924-12-28
1925	1925-01-11	1925-12-31
1926	1926-01-10	1926-12-26
1927	1927-01-13	1927-12-31
1928	1928-01-01	1928-12-26
1929	1929-01-06	1929-03-06
1930	1930-01-03	1930-12-28
1931	1931-01-08	1931-12-27
1932	1932-01-01	1932-12-28
1933	1933-01-09	1933-12-29
1934	1934-01-07	1934-12-03
1935	1935-01-06	1935-12-24
1936	1936-02-07	1936-12-28
1937	1937-01-04	1937-12-31
1938	1938-01-01	1938-12-31
1939	1939-01-01	1939-12-31
1940	1940-01-01	1940-12-31
1941	1941-01-01	1941-12-31
1942	1942-01-01	1942-12-31
1943	1943-01-01	1943-12-31
1944	1944-01-01	1944-12-31
1945	1945-01-01	1945-12-18
1946	1946-01-01	1946-12-31
1947	1947-01-01	1947-12-29
1948	1948-01-02	1948-12-31
1949	1949-01-01	1949-12-29
1950	1950-01-01	1950-12-24
1951	1951-01-02	1951-12-31
1952	1952-01-01	1952-12-24
1953	1953-01-07	1953-12-31
1954	1954-01-01	1954-12-31
1955	1955-01-01	1955-12-31
1956	1956-01-02	1956-12-31
1957	1957-01-02	1957-12-31
1958	1958-01-01	1958-12-29
1959	1959-01-04	1959-12-23
1960	1960-01-01	1960-12-31
1961	1961-01-01	1961-12-27
1962	1962-01-08	1962-12-30
1963	1963-01-04	1963-12-31
1964	1964-01-01	1964-12-31
1965	1965-01-01	1965-12-31
1966	1966-01-01	1966-12-26
1967	1967-01-04	1967-12-31
1968	1968-01-01	1968-12-31
1969	1969-01-01	1969-12-28
1970	1970-01-02	1970-12-31
1971	1971-01-01	1971-12-28
1972	1972-01-17	1972-12-31
1973	1973-01-08	1973-12-31
1974	1974-01-13	1974-12-29
1975	1975-01-07	1975-12-30
1976	1976-01-01	1976-12-31
1977	1977-01-01	1977-12-31
1978	1978-01-01	1978-12-21
1979	1979-01-01	1979-12-31
1980	1980-01-04	1980-12-28
1981	1981-01-07	1981-12-29
1982	1982-01-08	1982-12-31
1983	1983-01-06	1983-12-17
1984	1984-01-07	1984-12-31
1985	1985-01-01	1985-12-24
1986	1986-01-03	1986-12-27
1987	1987-01-01	1987-12-11
1988	1988-01-11	1988-12-31
1989	1989-01-02	1989-12-31
1990	1990-01-01	1990-12-29
1991	1991-01-02	1991-12-29
1992	1992-01-01	1992-12-31
1993	1993-01-01	1993-12-31
1994	1994-02-14	1994-12-19
1995	1995-01-05	1995-12-31
1996	1996-01-01	1996-12-31
1997	1997-01-01	1997-12-30
1998	1998-01-27	1998-12-28
1999	1999-01-06	1999-12-28
2000	2000-01-10	2000-12-25
2001	2001-01-14	2001-12-30
2002	2002-01-02	2002-12-12
2003	2003-01-10	2003-12-25

Every Fixed Threshold

Fixed thresholds at Bologna
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
0 C (32 F): Frost days (min	190	99	1858	18
-10 C (14 F): Days with min	27	6	1830	2
20 C (68 F): Tropical nights (min	190	90	1822	86
25 C (77 F): Days with min	118	26	1820	21
10 mm (0.39 in): Days with 10 mm or more rain	195	41	1869	20
25 mm (0.98 in): Days with 25 mm or more rain	191	15	1876	4
50 mm (1.97 in): Days with 50 mm or more rain	100	5	1892	2
100 mm (3.94 in): Days with 100 mm or more rain	9	1	1830	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1814.

Download the Data

Data for Bologna threshold days by year: CSV or JSON. Field meanings are on the data page.

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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Bologna Threshold Days by Year

Key Facts for Bologna Thresholds

Nights at or below 0 C (32 F)

Every Fixed Threshold

Download the Data

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