Westerville Threshold Days by Year (USC00338951)

16 fixed thresholds counted per year at Westerville (USC00338951): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Westerville Thresholds

Westerville: days with 10 mm (0.39 in) or more of precipitation in 72 years, most in 2011 with 51.
Westerville: days with 25 mm (0.98 in) or more of precipitation in 72 years, most in 1990 with 18.
Westerville: days with a maximum temperature at or above 30 C (86 F) in 71 years, most in 1959 with 89.
Westerville: days with a maximum temperature at or above 90 F (32.2 C) in 71 years, most in 1988 with 51.
16 fixed thresholds have at least one qualifying day at Westerville.

Days at or above 30 C (86 F)

71 years with a qualifying day

Days per year at Westerville with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 89 in 1959.

Days at or above 30 C (86 F) per year at Westerville
Year	Days	Decade average
1953	77	60.8
1954	56	60.8
1957	51	60.8
1958	31	60.8
1959	89	60.8
1960	55	48.9
1961	48	48.9
1962	53	48.9
1963	44	48.9
1964	65	48.9
1965	43	48.9
1966	52	48.9
1967	42	48.9
1968	50	48.9
1969	37	48.9
1970	60	39.2
1971	39	39.2
1972	17	39.2
1973	26	39.2
1974	25	39.2
1975	43	39.2
1976	34	39.2
1977	59	39.2
1978	54	39.2
1979	35	39.2
1980	60	50.5
1981	30	50.5
1982	48	50.5
1983	75	50.5
1984	46	50.5
1985	39	50.5
1986	54	50.5
1987	61	50.5
1988	65	50.5
1989	27	50.5
1990	38	45.2
1991	87	45.2
1992	21	45.2
1993	56	45.2
1994	36	45.2
1995	50	45.2
1996	36	45.2
1997	24	45.2
1998	59	45.2
2000	25	44.6
2001	48	44.6
2002	74	44.6
2003	29	44.6
2004	35	44.6
2005	58	44.6
2006	43	44.6
2007	74	44.6
2008	44	44.6
2009	16	44.6
2010	66	54.8
2011	59	54.8
2012	71	54.8
2013	36	54.8
2014	31	54.8
2015	42	54.8
2016	77	54.8
2017	45	54.8
2018	58	54.8
2019	63	54.8
2020	60	50.6
2021	51	50.6
2022	40	50.6
2023	34	50.6
2024	64	50.6
2025	57	50.6
2026	48	50.6

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

First to last qualifying date each year at Westerville
Year	First date	Last date
1953	1953-05-25	1953-10-21
1954	1954-05-31	1954-10-02
1957	1957-05-13	1957-09-02
1958	1958-06-04	1958-09-15
1959	1959-05-02	1959-10-05
1960	1960-04-23	1960-09-09
1961	1961-06-01	1961-09-25
1962	1962-04-30	1962-09-14
1963	1963-05-09	1963-10-07
1964	1964-05-19	1964-09-22
1965	1965-05-06	1965-09-21
1966	1966-06-04	1966-09-04
1967	1967-05-27	1967-09-16
1968	1968-06-07	1968-09-23
1969	1969-05-06	1969-09-04
1970	1970-05-20	1970-09-25
1971	1971-06-04	1971-10-01
1972	1972-06-19	1972-08-18
1973	1973-06-03	1973-09-05
1974	1974-06-20	1974-08-26
1975	1975-05-20	1975-08-28
1976	1976-06-07	1976-09-08
1977	1977-05-16	1977-09-05
1978	1978-05-26	1978-09-21
1979	1979-05-08	1979-09-12
1980	1980-05-29	1980-09-23
1981	1981-06-14	1981-09-13
1982	1982-05-06	1982-09-14
1983	1983-06-10	1983-09-20
1984	1984-06-05	1984-09-23
1985	1985-04-21	1985-09-23
1986	1986-04-27	1986-09-30
1987	1987-05-14	1987-08-22
1988	1988-05-15	1988-08-19
1989	1989-05-30	1989-09-10
1990	1990-04-27	1990-09-07
1991	1991-05-12	1991-09-17
1992	1992-05-22	1992-08-27
1993	1993-05-09	1993-09-15
1994	1994-06-06	1994-09-16
1995	1995-06-17	1995-09-05
1996	1996-05-18	1996-09-05
1997	1997-06-20	1997-10-05
1998	1998-05-14	1998-09-28
2000	2000-05-07	2000-09-02
2001	2001-05-03	2001-09-09
2002	2002-05-31	2002-10-03
2003	2003-06-23	2003-08-29
2004	2004-05-06	2004-09-07
2005	2005-05-12	2005-09-23
2006	2006-05-28	2006-08-27
2007	2007-05-01	2007-10-09
2008	2008-06-05	2008-09-15
2009	2009-04-25	2009-08-18
2010	2010-05-26	2010-09-24
2011	2011-05-12	2011-09-04
2012	2012-05-03	2012-09-08
2013	2013-05-15	2013-09-20
2014	2014-05-13	2014-09-06
2015	2015-05-07	2015-09-09
2016	2016-05-27	2016-09-24
2017	2017-04-27	2017-09-28
2018	2018-05-25	2018-10-09
2019	2019-05-18	2019-10-04
2020	2020-05-24	2020-09-12
2021	2021-05-20	2021-09-19
2022	2022-05-21	2022-09-22
2023	2023-06-01	2023-10-03
2024	2024-05-20	2024-09-22
2025	2025-06-04	2025-09-29
2026	2026-05-18	2026-10-14

Every Fixed Threshold

Fixed thresholds at Westerville
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	71	89	1959	48
35 C (95 F): Days	32	18	1988	7
90 F (32.2 C): Days	71	51	1988	16
100 F (37.8 C): Days	4	4	1988	4
0 C (32 F): Ice days (max	71	53	1978	25
0 C (32 F): Frost days (min	71	154	1969	69
-10 C (14 F): Days with min	71	53	1978	21
-20 C (-4 F): Days with min	43	17	1963	6
-30 C (-22 F): Days with min	5	2	1963	2
20 C (68 F): Tropical nights (min	70	53	2016	40
25 C (77 F): Days with min	14	2	1996	1
10 mm (0.39 in): Days with 10 mm or more rain	72	51	2011	38
25 mm (0.98 in): Days with 25 mm or more rain	72	18	1990	10
50 mm (1.97 in): Days with 50 mm or more rain	49	4	2014	3
100 mm (3.94 in): Days with 100 mm or more rain	6	1	1959	1
10 cm (3.9 in): Days with 10 cm or more snowfall	38	4	1979	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1953.

Download the Data

Data for Westerville 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).

Westerville Threshold Days by Year (USC00338951)

Key Facts for Westerville Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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