Circleville Threshold Days by Year (USC00421432)

16 fixed thresholds counted per year at Circleville (USC00421432): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Circleville Thresholds

Circleville: days with 10 mm (0.39 in) or more of precipitation in 55 years, most in 1980 with 11.
Circleville: days with a maximum temperature at or above 30 C (86 F) in 43 years, most in 2002 with 78.
Circleville: days with a maximum temperature at or above 90 F (32.2 C) in 43 years, most in 2002 with 60.
Circleville: nights with a minimum temperature at or below 0 C (32 F) in 43 years, most in 1968 with 207.
16 fixed thresholds have at least one qualifying day at Circleville.

Days at or above 30 C (86 F)

43 years with a qualifying day

Days per year at Circleville with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 78 in 2002.

Days at or above 30 C (86 F) per year at Circleville
Year	Days	Decade average
1960	77	55.6
1963	64	55.6
1964	55	55.6
1965	33	55.6
1966	62	55.6
1967	54	55.6
1968	41	55.6
1969	59	55.6
1970	54	61.4
1971	63	61.4
1972	50	61.4
1973	56	61.4
1974	77	61.4
1975	51	61.4
1976	57	61.4
1977	72	61.4
1978	66	61.4
1979	68	61.4
1980	60	50.5
1981	67	50.5
1982	37	50.5
1983	39	50.5
1984	41	50.5
1985	59	50.5
1986	54	50.5
1987	45	50.5
1988	57	50.5
1989	46	50.5
1990	60	51.4
1991	41	51.4
1992	42	51.4
1993	29	51.4
1994	71	51.4
1995	47	51.4
1996	77	51.4
1997	44	51.4
1998	62	51.4
1999	41	51.4
2000	70	66.8
2001	75	66.8
2002	78	66.8
2004	59	66.8
2005	52	66.8

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

First to last qualifying date each year at Circleville
Year	First date	Last date
1960	1960-05-10	1960-09-27
1963	1963-05-17	1963-10-02
1964	1964-06-16	1964-09-13
1965	1965-06-22	1965-08-29
1966	1966-06-14	1966-09-23
1967	1967-05-23	1967-09-05
1968	1968-05-30	1968-09-10
1969	1969-05-30	1969-09-07
1970	1970-06-19	1970-09-12
1971	1971-06-14	1971-09-15
1972	1972-06-01	1972-08-23
1973	1973-06-08	1973-09-14
1974	1974-05-27	1974-09-20
1975	1975-05-14	1975-09-27
1976	1976-05-14	1976-09-05
1977	1977-06-01	1977-09-09
1978	1978-05-30	1978-09-05
1979	1979-06-06	1979-09-18
1980	1980-06-09	1980-09-30
1981	1981-05-01	1981-09-04
1982	1982-06-24	1982-09-03
1983	1983-05-28	1983-09-15
1984	1984-05-23	1984-09-18
1985	1985-06-06	1985-08-31
1986	1986-06-12	1986-09-06
1987	1987-06-04	1987-09-02
1988	1988-05-15	1988-09-08
1989	1989-06-14	1989-09-28
1990	1990-06-03	1990-09-15
1991	1991-07-02	1991-09-04
1992	1992-06-20	1992-09-22
1993	1993-05-11	1993-09-11
1994	1994-05-30	1994-09-27
1995	1995-06-12	1995-09-16
1996	1996-05-12	1996-09-03
1997	1997-05-30	1997-08-30
1998	1998-06-21	1998-09-18
1999	1999-06-15	1999-08-29
2000	2000-05-22	2000-09-17
2001	2001-05-23	2001-09-24
2002	2002-05-28	2002-09-24
2004	2004-06-02	2004-09-27
2005	2005-05-20	2005-09-20

Every Fixed Threshold

Fixed thresholds at Circleville
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	43	78	2002	52
35 C (95 F): Days	37	24	1960	11
40 C (104 F): Days	1	2	2002	2
90 F (32.2 C): Days	43	60	2002	28
100 F (37.8 C): Days	9	8	1960	2
0 C (32 F): Ice days (max	42	25	1971	4
0 C (32 F): Frost days (min	43	207	1968	181
-10 C (14 F): Days with min	43	84	1964	56
-20 C (-4 F): Days with min	36	18	1989	5
-30 C (-22 F): Days with min	4	4	1990	4
20 C (68 F): Tropical nights (min	3	1	1978	1
10 mm (0.39 in): Days with 10 mm or more rain	55	11	1980	2
25 mm (0.98 in): Days with 25 mm or more rain	19	2	1963	1
50 mm (1.97 in): Days with 50 mm or more rain	3	1	1967	1
10 cm (3.9 in): Days with 10 cm or more snowfall	32	6	1944	2
25 cm (9.8 in): Days with 25 cm or more snowfall	3	2	1984	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1960.

Download the Data

Data for Circleville 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).

Circleville Threshold Days by Year (USC00421432)

Key Facts for Circleville Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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