Dubuque River Threshold Days by Year (USW00014934)

19 fixed thresholds counted per year at Dubuque River (USW00014934): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Dubuque River Thresholds

Dubuque River: days with 10 mm (0.39 in) or more of precipitation in 78 years, most in 1951 with 43.
Dubuque River: days with 25 mm (0.98 in) or more of precipitation in 78 years, most in 1892 with 15.
Dubuque River: days with a maximum temperature at or above 30 C (86 F) in 77 years, most in 1895 with 71.
Dubuque River: days with a maximum temperature at or below 0 C (32 F) in 77 years, most in 1875 with 74.
19 fixed thresholds have at least one qualifying day at Dubuque River.

Days at or above 30 C (86 F)

77 years with a qualifying day

Days per year at Dubuque River with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 71 in 1895.

Days at or above 30 C (86 F) per year at Dubuque River
Year	Days	Decade average
1875	19	33.2
1876	35	33.2
1877	41	33.2
1878	37	33.2
1879	34	33.2
1880	52	35
1881	50	35
1882	16	35
1883	18	35
1884	29	35
1885	23	35
1886	54	35
1887	43	35
1888	32	35
1889	33	35
1890	34	45.6
1891	34	45.6
1892	26	45.6
1893	39	45.6
1894	70	45.6
1895	71	45.6
1896	54	45.6
1897	49	45.6
1898	35	45.6
1899	44	45.6
1900	45	29.8
1901	64	29.8
1902	19	29.8
1903	14	29.8
1904	20	29.8
1905	25	29.8
1906	34	29.8
1907	14	29.8
1908	34	29.8
1909	29	29.8
1910	47	36
1911	46	36
1912	28	36
1913	51	36
1914	43	36
1915	11	36
1916	47	36
1917	20	36
1918	26	36
1919	41	36
1920	33	31
1921	60	31
1922	31	31
1923	38	31
1924	15	31
1925	32	31
1926	21	31
1927	29	31
1928	24	31
1929	27	31
1930	43	50.2
1931	62	50.2
1932	33	50.2
1933	57	50.2
1934	59	50.2
1935	45	50.2
1936	59	50.2
1937	55	50.2
1938	35	50.2
1939	54	50.2
1940	40	41.7
1941	51	41.7
1942	36	41.7
1943	44	41.7
1944	39	41.7
1945	28	41.7
1946	32	41.7
1947	54	41.7
1948	46	41.7
1949	47	41.7
1950	20	17
1951	14	17

For each year, a bar from the first to the last day at Dubuque River meeting 30 C (86 F).

First to last qualifying date each year at Dubuque River
Year	First date	Last date
1875	1875-05-24	1875-09-08
1876	1876-05-28	1876-08-29
1877	1877-05-29	1877-09-14
1878	1878-06-24	1878-09-08
1879	1879-05-11	1879-10-05
1880	1880-05-02	1880-09-05
1881	1881-05-24	1881-09-21
1882	1882-06-08	1882-09-18
1883	1883-06-28	1883-08-21
1884	1884-06-07	1884-09-15
1885	1885-05-24	1885-09-25
1886	1886-05-21	1886-09-23
1887	1887-05-01	1887-09-06
1888	1888-06-08	1888-08-30
1889	1889-06-18	1889-09-14
1890	1890-05-29	1890-09-06
1891	1891-06-03	1891-10-02
1892	1892-06-11	1892-08-18
1893	1893-06-12	1893-09-21
1894	1894-05-14	1894-09-05
1895	1895-03-29	1895-09-22
1896	1896-04-15	1896-09-09
1897	1897-06-12	1897-10-15
1898	1898-06-03	1898-09-04
1899	1899-06-03	1899-09-16
1900	1900-05-13	1900-10-03
1901	1901-04-29	1901-09-06
1902	1902-05-18	1902-08-02
1903	1903-06-30	1903-08-24
1904	1904-05-22	1904-09-28
1905	1905-06-04	1905-09-27
1906	1906-05-17	1906-09-19
1907	1907-06-16	1907-09-01
1908	1908-06-20	1908-09-25
1909	1909-05-05	1909-09-13
1910	1910-04-29	1910-08-24
1911	1911-05-09	1911-09-14
1912	1912-06-25	1912-09-09
1913	1913-05-28	1913-09-07
1914	1914-05-25	1914-08-30
1915	1915-04-28	1915-09-13
1916	1916-06-29	1916-09-06
1917	1917-05-18	1917-09-05
1918	1918-05-03	1918-08-25
1919	1919-05-30	1919-09-20
1920	1920-06-08	1920-09-25
1921	1921-05-20	1921-09-04
1922	1922-05-10	1922-10-05
1923	1923-06-01	1923-09-05
1924	1924-05-05	1924-08-30
1925	1925-04-22	1925-09-19
1926	1926-04-30	1926-09-18
1927	1927-05-21	1927-09-17
1928	1928-05-03	1928-08-27
1929	1929-05-28	1929-09-03
1930	1930-04-10	1930-10-10
1931	1931-05-27	1931-09-20
1932	1932-05-14	1932-09-19
1933	1933-06-03	1933-09-23
1934	1934-05-05	1934-09-25
1935	1935-06-13	1935-09-24
1936	1936-05-06	1936-09-22
1937	1937-05-29	1937-09-23
1938	1938-06-21	1938-09-23
1939	1939-05-05	1939-10-07
1940	1940-05-13	1940-09-20
1941	1941-05-15	1941-09-22
1942	1942-04-29	1942-09-11
1943	1943-05-29	1943-09-03
1944	1944-05-14	1944-09-03
1945	1945-06-23	1945-09-07
1946	1946-06-10	1946-09-06
1947	1947-06-09	1947-10-21
1948	1948-05-20	1948-09-19
1949	1949-05-03	1949-10-08
1950	1950-05-24	1950-10-18
1951	1951-05-19	1951-08-31

Every Fixed Threshold

Fixed thresholds at Dubuque River
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	77	71	1895	14
35 C (95 F): Days	59	26	1936	3
40 C (104 F): Days	4	6	1936	6
90 F (32.2 C): Days	76	42	1934	3
100 F (37.8 C): Days	14	15	1936	2
110 F (43.3 C): Days	1	1	1936	1
0 C (32 F): Ice days (max	77	74	1875	67
0 C (32 F): Frost days (min	77	155	1887	149
-10 C (14 F): Days with min	77	81	1875	68
-20 C (-4 F): Days with min	76	36	1875	23
-30 C (-22 F): Days with min	26	4	1888	2
20 C (68 F): Tropical nights (min	77	50	1921	7
25 C (77 F): Days with min	30	9	1931	1
10 mm (0.39 in): Days with 10 mm or more rain	78	43	1951	43
25 mm (0.98 in): Days with 25 mm or more rain	78	15	1892	10
50 mm (1.97 in): Days with 50 mm or more rain	60	7	1876	1
100 mm (3.94 in): Days with 100 mm or more rain	4	1	1875	1
10 cm (3.9 in): Days with 10 cm or more snowfall	59	7	1887	4
25 cm (9.8 in): Days with 25 cm or more snowfall	7	3	1887	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1875.

Download the Data

Data for Dubuque River 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Dubuque River Threshold Days by Year (USW00014934)

Key Facts for Dubuque River Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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