Clarion Threshold Days by Year (USC00131541)

17 fixed thresholds counted per year at Clarion (USC00131541): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Clarion Thresholds

Clarion: days with 10 mm (0.39 in) or more of precipitation in 58 years, most in 1983 with 39.
Clarion: days with 25 mm (0.98 in) or more of precipitation in 58 years, most in 1993 with 15.
Clarion: days with a maximum temperature at or above 30 C (86 F) in 54 years, most in 1988 with 64.
Clarion: days with a maximum temperature at or above 90 F (32.2 C) in 54 years, most in 1988 with 43.
17 fixed thresholds have at least one qualifying day at Clarion.

Days at or above 30 C (86 F)

54 years with a qualifying day

Days per year at Clarion with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 64 in 1988.

Days at or above 30 C (86 F) per year at Clarion
Year	Days	Decade average
1945	30	40.6
1946	28	40.6
1947	57	40.6
1948	44	40.6
1949	44	40.6
1950	17	36.1
1951	13	36.1
1952	49	36.1
1953	38	36.1
1954	33	36.1
1955	53	36.1
1956	46	36.1
1957	31	36.1
1959	45	36.1
1960	34	33.1
1961	30	33.1
1962	32	33.1
1963	37	33.1
1964	46	33.1
1965	26	33.1
1966	40	33.1
1967	25	33.1
1968	36	33.1
1969	25	33.1
1970	51	39.1
1971	40	39.1
1972	36	39.1
1974	33	39.1
1975	49	39.1
1976	43	39.1
1977	40	39.1
1978	34	39.1
1979	26	39.1
1980	50	39.7
1981	21	39.7
1982	18	39.7
1983	58	39.7
1984	41	39.7
1985	36	39.7
1986	30	39.7
1987	55	39.7
1988	64	39.7
1989	24	39.7
1990	31	28.3
1991	42	28.3
1992	16	28.3
1993	12	28.3
1994	22	28.3
1995	35	28.3
1996	17	28.3
1997	32	28.3
1998	37	28.3
1999	39	28.3
2004	16	16

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

First to last qualifying date each year at Clarion
Year	First date	Last date
1945	1945-06-13	1945-09-23
1946	1946-04-17	1946-09-05
1947	1947-06-09	1947-10-21
1948	1948-04-18	1948-09-19
1949	1949-04-25	1949-08-26
1950	1950-05-23	1950-09-18
1951	1951-07-07	1951-10-01
1952	1952-04-29	1952-09-30
1953	1953-05-25	1953-10-02
1954	1954-06-11	1954-09-18
1955	1955-05-02	1955-09-18
1956	1956-05-13	1956-10-12
1957	1957-06-06	1957-08-31
1959	1959-05-01	1959-09-08
1960	1960-04-22	1960-09-07
1961	1961-05-12	1961-09-10
1962	1962-05-04	1962-09-12
1963	1963-05-08	1963-10-06
1964	1964-04-16	1964-09-09
1965	1965-05-01	1965-08-25
1966	1966-05-05	1966-09-01
1967	1967-04-16	1967-08-17
1968	1968-04-30	1968-08-23
1969	1969-05-27	1969-10-04
1970	1970-04-27	1970-09-20
1971	1971-05-13	1971-09-30
1972	1972-05-17	1972-09-17
1974	1974-06-04	1974-09-27
1975	1975-05-19	1975-10-14
1976	1976-06-07	1976-10-02
1977	1977-04-10	1977-09-07
1978	1978-05-26	1978-09-12
1979	1979-05-18	1979-09-11
1980	1980-04-21	1980-09-20
1981	1981-04-28	1981-09-14
1982	1982-05-05	1982-09-12
1983	1983-06-09	1983-10-03
1984	1984-06-02	1984-09-20
1985	1985-04-18	1985-09-20
1986	1986-03-30	1986-09-28
1987	1987-04-20	1987-09-06
1988	1988-05-07	1988-09-19
1989	1989-05-17	1989-09-01
1990	1990-05-08	1990-10-06
1991	1991-04-07	1991-09-10
1992	1992-05-01	1992-10-03
1993	1993-06-12	1993-10-08
1994	1994-04-19	1994-09-15
1995	1995-06-16	1995-08-31
1996	1996-05-18	1996-08-07
1997	1997-06-14	1997-10-08
1998	1998-05-15	1998-09-27
1999	1999-05-28	1999-09-08
2004	2004-04-17	2004-09-20

Every Fixed Threshold

Fixed thresholds at Clarion
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	54	64	1988	16
35 C (95 F): Days	37	20	1947	2
90 F (32.2 C): Days	54	43	1988	3
100 F (37.8 C): Days	11	6	1988	1
0 C (32 F): Ice days (max	54	96	1975	48
0 C (32 F): Frost days (min	53	183	1989	152
-10 C (14 F): Days with min	53	92	1978	37
-20 C (-4 F): Days with min	53	41	1978	11
-30 C (-22 F): Days with min	28	6	1994	4
20 C (68 F): Tropical nights (min	53	30	1983	17
25 C (77 F): Days with min	2	1	1963	1
10 mm (0.39 in): Days with 10 mm or more rain	58	39	1983	31
25 mm (0.98 in): Days with 25 mm or more rain	58	15	1993	13
50 mm (1.97 in): Days with 50 mm or more rain	44	5	1991	1
100 mm (3.94 in): Days with 100 mm or more rain	7	1	1951	1
10 cm (3.9 in): Days with 10 cm or more snowfall	54	6	1965	5
25 cm (9.8 in): Days with 25 cm or more snowfall	4	2	1971	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1945.

Download the Data

Data for Clarion 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).

Clarion Threshold Days by Year (USC00131541)

Key Facts for Clarion Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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