Shelton Threshold Days by Year (USC00457584)

16 fixed thresholds counted per year at Shelton (USC00457584): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Shelton Thresholds

Shelton: days with 10 mm (0.39 in) or more of precipitation in 63 years, most in 1968 with 73.
Shelton: days with 25 mm (0.98 in) or more of precipitation in 63 years, most in 1933 with 27.
Shelton: nights with a minimum temperature at or below 0 C (32 F) in 62 years, most in 1935 with 97.
Shelton: days with a maximum temperature at or above 30 C (86 F) in 60 years, most in 1958 with 33.
16 fixed thresholds have at least one qualifying day at Shelton.

Days at or above 30 C (86 F)

60 years with a qualifying day

Days per year at Shelton with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 33 in 1958.

Days at or above 30 C (86 F) per year at Shelton
Year	Days	Decade average
1932	13	16.3
1933	16	16.3
1934	17	16.3
1935	20	16.3
1936	9	16.3
1937	11	16.3
1938	22	16.3
1939	22	16.3
1940	15	14.4
1941	16	14.4
1942	13	14.4
1944	13	14.4
1945	20	14.4
1946	15	14.4
1947	7	14.4
1949	16	14.4
1950	19	15.6
1951	15	15.6
1952	18	15.6
1953	9	15.6
1955	9	15.6
1956	15	15.6
1957	7	15.6
1958	33	15.6
1959	15	15.6
1960	17	15.3
1961	21	15.3
1962	11	15.3
1965	12	15.3
1966	6	15.3
1967	28	15.3
1968	15	15.3
1969	12	15.3
1970	16	13.2
1971	17	13.2
1972	14	13.2
1973	13	13.2
1974	15	13.2
1975	5	13.2
1976	1	13.2
1977	18	13.2
1978	20	13.2
1979	13	13.2
1980	8	15.8
1981	18	15.8
1982	13	15.8
1983	6	15.8
1984	9	15.8
1985	26	15.8
1986	18	15.8
1987	26	15.8
1988	22	15.8
1989	12	15.8
1990	18	14.7
1991	16	14.7
1992	22	14.7
1993	10	14.7
1994	6	14.7
1997	11	14.7
1998	20	14.7

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

First to last qualifying date each year at Shelton
Year	First date	Last date
1932	1932-06-09	1932-08-07
1933	1933-06-12	1933-08-27
1934	1934-04-19	1934-09-03
1935	1935-06-06	1935-09-08
1936	1936-05-12	1936-08-28
1937	1937-06-01	1937-09-14
1938	1938-05-21	1938-09-17
1939	1939-05-13	1939-08-22
1940	1940-05-22	1940-09-23
1941	1941-05-22	1941-08-19
1942	1942-06-05	1942-08-22
1944	1944-05-27	1944-09-10
1945	1945-05-02	1945-09-12
1946	1946-05-02	1946-08-22
1947	1947-05-23	1947-09-01
1949	1949-05-11	1949-09-07
1950	1950-06-03	1950-09-21
1951	1951-06-27	1951-09-15
1952	1952-05-17	1952-09-22
1953	1953-05-05	1953-09-05
1955	1955-06-08	1955-09-05
1956	1956-05-17	1956-09-06
1957	1957-08-22	1957-09-23
1958	1958-05-17	1958-09-07
1959	1959-06-01	1959-08-07
1960	1960-07-05	1960-09-11
1961	1961-05-19	1961-08-22
1962	1962-07-21	1962-09-05
1965	1965-07-01	1965-08-19
1966	1966-06-16	1966-09-05
1967	1967-06-16	1967-09-28
1968	1968-06-26	1968-08-11
1969	1969-05-09	1969-07-31
1970	1970-06-02	1970-08-30
1971	1971-05-12	1971-08-29
1972	1972-05-28	1972-09-04
1973	1973-05-14	1973-08-13
1974	1974-06-14	1974-09-25
1975	1975-06-02	1975-09-13
1976	1976-07-16	1976-07-16
1977	1977-06-06	1977-08-18
1978	1978-06-02	1978-08-10
1979	1979-06-01	1979-09-14
1980	1980-07-21	1980-10-05
1981	1981-07-03	1981-09-15
1982	1982-06-10	1982-09-03
1983	1983-05-24	1983-08-13
1984	1984-06-23	1984-08-09
1985	1985-05-16	1985-08-25
1986	1986-05-30	1986-09-06
1987	1987-04-27	1987-09-22
1988	1988-05-21	1988-09-03
1989	1989-06-03	1989-09-22
1990	1990-06-21	1990-09-22
1991	1991-07-02	1991-09-18
1992	1992-05-04	1992-08-26
1993	1993-05-24	1993-09-10
1994	1994-07-19	1994-08-27
1997	1997-05-11	1997-09-24
1998	1998-04-30	1998-09-03

Every Fixed Threshold

Fixed thresholds at Shelton
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	60	33	1958	20
35 C (95 F): Days	42	6	1942	6
40 C (104 F): Days	3	1	1941	1
90 F (32.2 C): Days	59	17	1935	10
100 F (37.8 C): Days	12	3	1941	1
0 C (32 F): Ice days (max	33	13	1950	5
0 C (32 F): Frost days (min	62	97	1935	48
-10 C (14 F): Days with min	30	12	1950	3
20 C (68 F): Tropical nights (min	4	2	1937	1
10 mm (0.39 in): Days with 10 mm or more rain	63	73	1968	57
25 mm (0.98 in): Days with 25 mm or more rain	63	27	1933	23
50 mm (1.97 in): Days with 50 mm or more rain	57	10	1932	5
100 mm (3.94 in): Days with 100 mm or more rain	11	2	1933	1
10 cm (3.9 in): Days with 10 cm or more snowfall	23	3	1935	1
25 cm (9.8 in): Days with 25 cm or more snowfall	3	1	1972	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	0	n/a	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1932.

Download the Data

Data for Shelton 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).

Shelton Threshold Days by Year (USC00457584)

Key Facts for Shelton Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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