Nelson Threshold Days by Year

14 fixed thresholds counted per year at Nelson (CA001145430): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Nelson Thresholds

Nelson: days with a maximum temperature at or above 30 C (86 F) in 50 years, most in 1922 with 60.
Nelson: days with a maximum temperature at or below 0 C (32 F) in 50 years, most in 1916 with 75.
Nelson: nights with a minimum temperature at or below 0 C (32 F) in 50 years, most in 1922 with 192.
Nelson: days with 10 mm (0.39 in) or more of precipitation in 50 years, most in 1937 with 30.
14 fixed thresholds have at least one qualifying day at Nelson.

Days at or above 30 C (86 F)

50 years with a qualifying day

Days per year at Nelson with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 60 in 1922.

Days at or above 30 C (86 F) per year at Nelson
Year	Days	Decade average
1904	21	16.8
1905	23	16.8
1906	28	16.8
1907	3	16.8
1908	20	16.8
1909	6	16.8
1910	10	19.7
1911	13	19.7
1912	13	19.7
1913	18	19.7
1914	33	19.7
1915	35	19.7
1916	15	19.7
1917	28	19.7
1918	11	19.7
1919	21	19.7
1920	29	30
1921	32	30
1922	60	30
1923	26	30
1924	27	30
1925	29	30
1926	29	30
1927	17	30
1928	26	30
1929	25	30
1930	29	26.6
1931	38	26.6
1932	27	26.6
1933	30	26.6
1934	25	26.6
1935	18	26.6
1937	16	26.6
1938	30	26.6
1939	26	26.6
1940	35	30.7
1941	22	30.7
1942	29	30.7
1943	32	30.7
1944	33	30.7
1945	53	30.7
1946	29	30.7
1947	24	30.7
1948	14	30.7
1949	36	30.7
1950	22	26.4
1951	36	26.4
1952	29	26.4
1953	32	26.4
1954	13	26.4

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

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

Every Fixed Threshold

Fixed thresholds at Nelson
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	50	60	1922	13
35 C (95 F): Days	33	14	1922	1
90 F (32.2 C): Days	49	36	1922	3
100 F (37.8 C): Days	13	3	1944	1
0 C (32 F): Ice days (max	50	75	1916	22
0 C (32 F): Frost days (min	50	192	1922	122
-10 C (14 F): Days with min	49	60	1922	15
-20 C (-4 F): Days with min	23	17	1950	1
20 C (68 F): Tropical nights (min	3	1	1914	1
10 mm (0.39 in): Days with 10 mm or more rain	50	30	1937	27
25 mm (0.98 in): Days with 25 mm or more rain	35	4	1907	3
50 mm (1.97 in): Days with 50 mm or more rain	1	1	1940	1
10 cm (3.9 in): Days with 10 cm or more snowfall	50	18	1904	8
25 cm (9.8 in): Days with 25 cm or more snowfall	16	3	1933	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1904.

Download the Data

Data for Nelson 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-14. Last revised 14 October 2026 (2026-10-14).

Nelson Threshold Days by Year

Key Facts for Nelson Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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