Grover 10 W Threshold Days by Year

16 fixed thresholds counted per year at Grover 10 W (USC00053643): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Grover 10 W Thresholds

Grover 10 W: days with a maximum temperature at or above 30 C (86 F) in 49 years, most in 1939 with 81.
Grover 10 W: days with a maximum temperature at or above 90 F (32.2 C) in 49 years, most in 1959 with 57.
Grover 10 W: days with a maximum temperature at or below 0 C (32 F) in 49 years, most in 1913 with 53.
Grover 10 W: nights with a minimum temperature at or below 0 C (32 F) in 48 years, most in 1951 with 208.
16 fixed thresholds have at least one qualifying day at Grover 10 W.

Days at or above 30 C (86 F)

49 years with a qualifying day

Days per year at Grover 10 W with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 81 in 1939.

Days at or above 30 C (86 F) per year at Grover 10 W
Year	Days	Decade average
1912	33	37.6
1913	45	37.6
1914	42	37.6
1915	16	37.6
1916	45	37.6
1917	39	37.6
1918	43	37.6
1920	35	35
1923	28	35
1924	48	35
1927	34	35
1928	36	35
1929	29	35
1930	49	67
1931	77	67
1932	62	67
1933	73	67
1934	77	67
1935	66	67
1938	51	67
1939	81	67
1940	69	55.4
1941	52	55.4
1942	47	55.4
1943	61	55.4
1944	50	55.4
1945	41	55.4
1946	61	55.4
1947	56	55.4
1948	68	55.4
1949	49	55.4
1950	42	56.8
1951	38	56.8
1952	66	56.8
1953	50	56.8
1954	71	56.8
1955	54	56.8
1956	67	56.8
1958	52	56.8
1959	71	56.8
1961	50	54.4
1962	50	54.4
1963	66	54.4
1964	67	54.4
1965	33	54.4
1966	64	54.4
1967	37	54.4
1968	55	54.4
1969	68	54.4

For each year, a bar from the first to the last day at Grover 10 W meeting 30 C (86 F).

First to last qualifying date each year at Grover 10 W
Year	First date	Last date
1912	1912-05-25	1912-09-08
1913	1913-06-14	1913-09-06
1914	1914-06-10	1914-09-27
1915	1915-07-09	1915-10-22
1916	1916-05-09	1916-09-08
1917	1917-06-09	1917-09-29
1918	1918-06-05	1918-09-14
1920	1920-06-06	1920-09-25
1923	1923-06-13	1923-09-09
1924	1924-06-11	1924-09-04
1927	1927-05-16	1927-09-12
1928	1928-05-01	1928-09-08
1929	1929-06-09	1929-09-02
1930	1930-06-11	1930-09-22
1931	1931-05-14	1931-09-29
1932	1932-05-22	1932-09-14
1933	1933-05-31	1933-09-20
1934	1934-05-06	1934-10-07
1935	1935-06-08	1935-09-23
1938	1938-05-28	1938-10-01
1939	1939-05-19	1939-09-22
1940	1940-05-03	1940-09-08
1941	1941-05-12	1941-09-20
1942	1942-05-26	1942-09-30
1943	1943-05-28	1943-09-17
1944	1944-06-20	1944-09-17
1945	1945-06-22	1945-09-08
1946	1946-06-04	1946-09-26
1947	1947-06-08	1947-10-05
1948	1948-05-17	1948-10-03
1949	1949-06-10	1949-09-25
1950	1950-06-06	1950-10-12
1951	1951-05-28	1951-09-11
1952	1952-06-06	1952-09-27
1953	1953-06-10	1953-10-10
1954	1954-05-20	1954-09-22
1955	1955-06-23	1955-09-16
1956	1956-06-01	1956-10-07
1958	1958-05-28	1958-10-15
1959	1959-05-01	1959-09-14
1961	1961-06-10	1961-09-18
1962	1962-05-09	1962-09-15
1963	1963-05-11	1963-10-05
1964	1964-05-16	1964-09-09
1965	1965-07-01	1965-10-09
1966	1966-05-05	1966-09-24
1967	1967-05-23	1967-10-03
1968	1968-06-03	1968-09-29
1969	1969-05-25	1969-09-28

Every Fixed Threshold

Fixed thresholds at Grover 10 W
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	49	81	1939	68
35 C (95 F): Days	45	27	1940	21
40 C (104 F): Days	4	2	1954	2
90 F (32.2 C): Days	49	57	1959	49
100 F (37.8 C): Days	15	8	1934	3
0 C (32 F): Ice days (max	49	53	1913	25
0 C (32 F): Frost days (min	48	208	1951	175
-10 C (14 F): Days with min	48	92	1913	53
-20 C (-4 F): Days with min	47	23	1916	2
-30 C (-22 F): Days with min	10	3	1924	1
20 C (68 F): Tropical nights (min	10	2	1930	2
10 mm (0.39 in): Days with 10 mm or more rain	45	21	1942	13
25 mm (0.98 in): Days with 25 mm or more rain	40	7	1915	4
50 mm (1.97 in): Days with 50 mm or more rain	7	1	1916	1
10 cm (3.9 in): Days with 10 cm or more snowfall	37	7	1945	3
25 cm (9.8 in): Days with 25 cm or more snowfall	4	1	1931	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1912.

Download the Data

Data for Grover 10 W 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).

Grover 10 W Threshold Days by Year

Key Facts for Grover 10 W Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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