Napoleon Threshold Days by Year (USC00335664)

18 fixed thresholds counted per year at Napoleon (USC00335664): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Napoleon Thresholds

Napoleon: nights with a minimum temperature at or below 0 C (32 F) in 68 years, most in 1917 with 156.
Napoleon: nights with a minimum temperature at or below -10 C (14 F) in 68 years, most in 1895 with 55.
Napoleon: nights with a minimum temperature at or above 20 C (68 F) in 68 years, most in 1921 with 31.
Napoleon: days with a maximum temperature at or above 30 C (86 F) in 67 years, most in 1944 with 81.
18 fixed thresholds have at least one qualifying day at Napoleon.

Days at or above 30 C (86 F)

67 years with a qualifying day

Days per year at Napoleon with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 81 in 1944.

Days at or above 30 C (86 F) per year at Napoleon
Year	Days	Decade average
1894	69	59
1895	66	59
1896	49	59
1897	56	59
1899	55	59
1900	57	35.1
1901	51	35.1
1902	27	35.1
1903	31	35.1
1904	8	35.1
1905	27	35.1
1906	40	35.1
1907	27	35.1
1908	52	35.1
1909	31	35.1
1910	40	46.2
1911	55	46.2
1912	20	46.2
1913	71	46.2
1914	55	46.2
1915	18	46.2
1916	53	46.2
1917	28	46.2
1918	58	46.2
1919	64	46.2
1920	31	33.8
1921	61	33.8
1922	40	33.8
1923	33	33.8
1924	20	33.8
1925	46	33.8
1926	20	33.8
1927	20	33.8
1928	37	33.8
1929	30	33.8
1930	51	56.4
1931	61	56.4
1932	51	56.4
1933	67	56.4
1934	71	56.4
1935	48	56.4
1936	75	56.4
1937	44	56.4
1938	43	56.4
1939	53	56.4
1940	52	57.1
1941	70	57.1
1942	43	57.1
1943	61	57.1
1944	81	57.1
1945	47	57.1
1946	60	57.1
1947	60	57.1
1948	50	57.1
1949	47	57.1
1950	37	54.7
1951	44	54.7
1952	64	54.7
1953	74	54.7
1954	55	54.7
1955	73	54.7
1956	51	54.7
1957	43	54.7
1958	30	54.7
1959	76	54.7
1960	48	49.5
1961	51	49.5

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

First to last qualifying date each year at Napoleon
Year	First date	Last date
1894	1894-04-28	1894-09-15
1895	1895-05-03	1895-09-22
1896	1896-04-16	1896-09-11
1897	1897-06-13	1897-10-15
1899	1899-04-21	1899-10-14
1900	1900-05-13	1900-10-06
1901	1901-05-08	1901-09-26
1902	1902-05-04	1902-08-31
1903	1903-05-17	1903-09-15
1904	1904-06-24	1904-09-02
1905	1905-06-05	1905-09-29
1906	1906-05-16	1906-09-21
1907	1907-03-24	1907-09-20
1908	1908-05-12	1908-09-27
1909	1909-06-22	1909-09-20
1910	1910-06-15	1910-10-03
1911	1911-05-10	1911-09-24
1912	1912-06-25	1912-09-11
1913	1913-05-16	1913-10-10
1914	1914-05-25	1914-09-22
1915	1915-04-24	1915-09-16
1916	1916-05-26	1916-10-08
1917	1917-05-18	1917-08-27
1918	1918-05-05	1918-08-26
1919	1919-05-30	1919-09-21
1920	1920-06-10	1920-09-27
1921	1921-05-21	1921-09-18
1922	1922-06-06	1922-10-05
1923	1923-06-01	1923-08-11
1924	1924-06-20	1924-09-01
1925	1925-04-24	1925-09-21
1926	1926-05-08	1926-08-30
1927	1927-05-10	1927-09-18
1928	1928-05-05	1928-10-12
1929	1929-05-27	1929-09-05
1930	1930-04-11	1930-09-13
1931	1931-05-18	1931-09-23
1932	1932-05-15	1932-09-19
1933	1933-05-24	1933-09-10
1934	1934-05-05	1934-09-26
1935	1935-06-13	1935-09-25
1936	1936-05-07	1936-09-23
1937	1937-05-30	1937-09-23
1938	1938-05-03	1938-09-12
1939	1939-05-19	1939-10-08
1940	1940-05-13	1940-09-21
1941	1941-04-13	1941-09-24
1942	1942-04-30	1942-09-18
1943	1943-06-03	1943-09-05
1944	1944-05-15	1944-09-27
1945	1945-06-14	1945-09-23
1946	1946-04-22	1946-10-07
1947	1947-06-09	1947-10-16
1948	1948-04-26	1948-09-19
1949	1949-05-03	1949-10-09
1950	1950-05-24	1950-10-17
1951	1951-05-02	1951-10-05
1952	1952-05-04	1952-09-29
1953	1953-05-25	1953-10-21
1954	1954-05-24	1954-09-28
1955	1955-05-03	1955-09-20
1956	1956-05-12	1956-10-16
1957	1957-05-01	1957-09-19
1958	1958-06-04	1958-09-06
1959	1959-05-02	1959-10-03
1960	1960-04-23	1960-09-25
1961	1961-06-01	1961-09-24

Every Fixed Threshold

Fixed thresholds at Napoleon
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	67	81	1944	51
35 C (95 F): Days	57	24	1955	2
40 C (104 F): Days	11	4	1934	1
90 F (32.2 C): Days	67	52	1934	18
100 F (37.8 C): Days	25	9	1936	2
110 F (43.3 C): Days	2	1	1936	1
0 C (32 F): Ice days (max	67	61	1912	33
0 C (32 F): Frost days (min	68	156	1917	139
-10 C (14 F): Days with min	68	55	1895	26
-20 C (-4 F): Days with min	52	16	1936	3
-30 C (-22 F): Days with min	1	1	1899	1
20 C (68 F): Tropical nights (min	68	31	1921	14
25 C (77 F): Days with min	8	4	1943	1
10 mm (0.39 in): Days with 10 mm or more rain	63	44	1950	36
25 mm (0.98 in): Days with 25 mm or more rain	63	13	1950	6
50 mm (1.97 in): Days with 50 mm or more rain	39	4	1950	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1920	1
10 cm (3.9 in): Days with 10 cm or more snowfall	17	7	1951	3

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

Download the Data

Data for Napoleon 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Napoleon Threshold Days by Year (USC00335664)

Key Facts for Napoleon Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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