Graysville Threshold Days by Year (CA005021160)

17 fixed thresholds counted per year at Graysville (CA005021160): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Graysville Thresholds

Graysville: nights with a minimum temperature at or below 0 C (32 F) in 46 years, most in 1979 with 220.
Graysville: nights with a minimum temperature at or below -10 C (14 F) in 46 years, most in 1979 with 128.
Graysville: nights with a minimum temperature at or below -20 C (-4 F) in 46 years, most in 1950 with 84.
Graysville: days with a maximum temperature at or above 30 C (86 F) in 45 years, most in 1961 with 51.
17 fixed thresholds have at least one qualifying day at Graysville.

Days at or above 30 C (86 F)

45 years with a qualifying day

Days per year at Graysville with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 51 in 1961.

Days at or above 30 C (86 F) per year at Graysville
Year	Days	Decade average
1926	10	8
1927	3	8
1928	5	8
1929	14	8
1930	6	20.1
1931	21	20.1
1932	20	20.1
1933	35	20.1
1935	10	20.1
1936	33	20.1
1937	16	20.1
1940	25	25.1
1941	28	25.1
1942	5	25.1
1945	15	25.1
1946	33	25.1
1947	37	25.1
1948	19	25.1
1949	39	25.1
1950	15	11
1951	11	11
1954	6	11
1956	12	11
1958	11	11
1961	51	20.4
1964	14	20.4
1965	7	20.4
1966	26	20.4
1967	21	20.4
1968	6	20.4
1969	18	20.4
1970	33	22
1971	10	22
1972	21	22
1973	17	22
1974	23	22
1975	17	22
1976	32	22
1977	19	22
1978	30	22
1979	18	22
1980	33	26.3
1981	20	26.3
1982	10	26.3
1983	42	26.3

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

First to last qualifying date each year at Graysville
Year	First date	Last date
1926	1926-05-05	1926-08-27
1927	1927-08-05	1927-09-13
1928	1928-05-22	1928-08-12
1929	1929-06-15	1929-09-01
1930	1930-05-21	1930-07-31
1931	1931-05-14	1931-09-12
1932	1932-05-13	1932-09-07
1933	1933-05-31	1933-08-31
1935	1935-07-16	1935-08-14
1936	1936-05-27	1936-09-04
1937	1937-05-28	1937-09-02
1940	1940-05-11	1940-09-05
1941	1941-05-17	1941-09-19
1942	1942-06-10	1942-09-08
1945	1945-06-21	1945-09-05
1946	1946-05-01	1946-09-14
1947	1947-04-28	1947-09-11
1948	1948-05-19	1948-09-07
1949	1949-04-28	1949-08-25
1950	1950-06-04	1950-09-06
1951	1951-05-23	1951-08-01
1954	1954-06-23	1954-08-31
1956	1956-05-21	1956-08-07
1958	1958-05-12	1958-08-11
1961	1961-05-20	1961-10-16
1964	1964-05-17	1964-08-05
1965	1965-05-13	1965-08-23
1966	1966-05-21	1966-09-12
1967	1967-06-03	1967-09-06
1968	1968-05-01	1968-09-14
1969	1969-05-26	1969-09-14
1970	1970-05-17	1970-09-19
1971	1971-06-03	1971-09-02
1972	1972-05-16	1972-08-30
1973	1973-05-17	1973-08-31
1974	1974-06-19	1974-08-07
1975	1975-06-20	1975-08-23
1976	1976-05-30	1976-09-30
1977	1977-04-30	1977-08-09
1978	1978-05-22	1978-09-10
1979	1979-06-12	1979-09-16
1980	1980-04-18	1980-09-07
1981	1981-05-20	1981-09-10
1982	1982-07-03	1982-09-10
1983	1983-06-09	1983-09-02

Every Fixed Threshold

Fixed thresholds at Graysville
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	45	51	1961	42
35 C (95 F): Days	35	13	1936	10
40 C (104 F): Days	4	2	1936	1
90 F (32.2 C): Days	44	32	1961	22
100 F (37.8 C): Days	15	6	1961	4
0 C (32 F): Ice days (max	45	141	1950	101
0 C (32 F): Frost days (min	46	220	1979	205
-10 C (14 F): Days with min	46	128	1979	103
-20 C (-4 F): Days with min	46	84	1950	44
-30 C (-22 F): Days with min	45	32	1936	12
-40 C (-40 F): Days with min	8	7	1966	1
20 C (68 F): Tropical nights (min	22	6	1931	2
10 mm (0.39 in): Days with 10 mm or more rain	42	23	1940	13
25 mm (0.98 in): Days with 25 mm or more rain	37	9	1971	1
50 mm (1.97 in): Days with 50 mm or more rain	7	2	1968	1
10 cm (3.9 in): Days with 10 cm or more snowfall	40	9	1950	1
25 cm (9.8 in): Days with 25 cm or more snowfall	10	1	1941	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1926.

Download the Data

Data for Graysville 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Graysville Threshold Days by Year (CA005021160)

Key Facts for Graysville Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related