Afton Threshold Days by Year (USC00130064)

20 fixed thresholds counted per year at Afton (USC00130064): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Afton Thresholds

Afton: days with a maximum temperature at or above 30 C (86 F) in 52 years, most in 1934 with 95.
Afton: days with a maximum temperature at or above 90 F (32.2 C) in 52 years, most in 1934 with 72.
Afton: days with a maximum temperature at or below 0 C (32 F) in 52 years, most in 1937 with 68.
Afton: days with a maximum temperature at or above 35 C (95 F) in 51 years, most in 1934 with 48.
20 fixed thresholds have at least one qualifying day at Afton.

Days at or above 30 C (86 F)

52 years with a qualifying day

Days per year at Afton with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 95 in 1934.

Days at or above 30 C (86 F) per year at Afton
Year	Days	Decade average
1895	74	70.6
1896	57	70.6
1897	81	70.6
1898	75	70.6
1899	66	70.6
1900	76	57.7
1901	80	57.7
1902	42	57.7
1903	33	57.7
1905	46	57.7
1906	62	57.7
1907	54	57.7
1908	61	57.7
1909	65	57.7
1910	41	55.4
1911	71	55.4
1912	39	55.4
1913	62	55.4
1914	77	55.4
1915	21	55.4
1916	68	55.4
1917	48	55.4
1918	69	55.4
1919	58	55.4
1920	49	59.2
1921	81	59.2
1922	64	59.2
1923	56	59.2
1924	44	59.2
1925	79	59.2
1926	56	59.2
1927	58	59.2
1928	46	59.2
1931	78	73
1932	55	73
1933	72	73
1934	95	73
1935	53	73
1936	88	73
1937	71	73
1938	66	73
1939	79	73
1940	64	52.5
1941	68	52.5
1942	56	52.5
1943	61	52.5
1944	50	52.5
1945	36	52.5
1946	37	52.5
1947	59	52.5
1948	52	52.5
1949	42	52.5

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

First to last qualifying date each year at Afton
Year	First date	Last date
1895	1895-03-29	1895-09-21
1896	1896-04-27	1896-09-08
1897	1897-05-16	1897-10-15
1898	1898-04-16	1898-10-02
1899	1899-05-27	1899-10-22
1900	1900-05-11	1900-09-10
1901	1901-05-02	1901-09-27
1902	1902-04-21	1902-08-19
1903	1903-05-10	1903-08-26
1905	1905-05-29	1905-10-05
1906	1906-04-24	1906-09-16
1907	1907-03-21	1907-09-23
1908	1908-05-16	1908-09-24
1909	1909-05-05	1909-10-03
1910	1910-04-28	1910-08-24
1911	1911-05-10	1911-09-17
1912	1912-06-26	1912-09-09
1913	1913-05-29	1913-09-10
1914	1914-05-10	1914-09-19
1915	1915-04-28	1915-08-16
1916	1916-04-12	1916-10-07
1917	1917-05-18	1917-09-16
1918	1918-05-03	1918-10-15
1919	1919-06-16	1919-09-20
1920	1920-05-22	1920-09-25
1921	1921-05-20	1921-10-16
1922	1922-06-06	1922-10-05
1923	1923-06-01	1923-09-06
1924	1924-05-05	1924-09-07
1925	1925-04-12	1925-09-28
1926	1926-04-29	1926-09-21
1927	1927-05-23	1927-10-26
1928	1928-03-22	1928-10-10
1931	1931-04-08	1931-10-04
1932	1932-05-13	1932-09-19
1933	1933-05-18	1933-09-18
1934	1934-05-06	1934-10-08
1935	1935-07-02	1935-09-24
1936	1936-04-20	1936-09-22
1937	1937-05-20	1937-10-29
1938	1938-05-18	1938-10-16
1939	1939-03-23	1939-10-07
1940	1940-05-05	1940-10-25
1941	1941-05-14	1941-09-20
1942	1942-05-26	1942-10-02
1943	1943-05-28	1943-09-05
1944	1944-05-14	1944-09-17
1945	1945-06-27	1945-09-23
1946	1946-06-06	1946-09-26
1947	1947-06-09	1947-10-21
1948	1948-06-03	1948-09-20
1949	1949-04-25	1949-10-07

Every Fixed Threshold

Fixed thresholds at Afton
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	52	95	1934	42
35 C (95 F): Days	51	48	1934	1
40 C (104 F): Days	12	17	1936	2
90 F (32.2 C): Days	52	72	1934	17
100 F (37.8 C): Days	27	34	1936	5
110 F (43.3 C): Days	3	3	1934	1
0 C (32 F): Ice days (max	52	68	1937	45
0 C (32 F): Frost days (min	51	156	1898	146
-10 C (14 F): Days with min	51	66	1895	58
-20 C (-4 F): Days with min	49	29	1936	9
-30 C (-22 F): Days with min	6	2	1905	1
20 C (68 F): Tropical nights (min	51	51	1934	9
25 C (77 F): Days with min	14	10	1934	1
10 mm (0.39 in): Days with 10 mm or more rain	48	42	1896	23
25 mm (0.98 in): Days with 25 mm or more rain	48	18	1909	7
50 mm (1.97 in): Days with 50 mm or more rain	39	5	1922	2
100 mm (3.94 in): Days with 100 mm or more rain	7	1	1895	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1903	1
10 cm (3.9 in): Days with 10 cm or more snowfall	16	6	1932	1
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1939	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1895.

Download the Data

Data for Afton 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).

Afton Threshold Days by Year (USC00130064)

Key Facts for Afton Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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