Keo Threshold Days by Year (USC00033862)

18 fixed thresholds counted per year at Keo (USC00033862): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Keo Thresholds

Keo: days with a maximum temperature at or above 30 C (86 F) in 75 years, most in 1953 with 140.
Keo: days with a maximum temperature at or above 90 F (32.2 C) in 75 years, most in 1954 with 117.
Keo: nights with a minimum temperature at or below 0 C (32 F) in 75 years, most in 1968 with 88.
Keo: nights with a minimum temperature at or above 20 C (68 F) in 75 years, most in 1998 with 124.
18 fixed thresholds have at least one qualifying day at Keo.

Days at or above 30 C (86 F)

75 years with a qualifying day

Days per year at Keo with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 140 in 1953.

Days at or above 30 C (86 F) per year at Keo
Year	Days	Decade average
1948	118	120.5
1949	123	120.5
1950	88	116
1951	113	116
1952	124	116
1953	140	116
1954	135	116
1955	124	116
1956	120	116
1957	99	116
1958	104	116
1959	113	116
1960	99	92.8
1961	87	92.8
1962	107	92.8
1963	116	92.8
1964	101	92.8
1965	111	92.8
1966	86	92.8
1967	68	92.8
1968	76	92.8
1969	77	92.8
1970	112	98.1
1971	98	98.1
1972	115	98.1
1973	102	98.1
1974	83	98.1
1975	96	98.1
1976	75	98.1
1977	116	98.1
1978	104	98.1
1979	80	98.1
1980	121	101.2
1981	90	101.2
1982	85	101.2
1983	100	101.2
1984	95	101.2
1985	104	101.2
1986	110	101.2
1987	126	101.2
1988	107	101.2
1989	74	101.2
1990	95	89.6
1991	90	89.6
1992	62	89.6
1993	90	89.6
1994	72	89.6
1995	100	89.6
1996	79	89.6
1997	84	89.6
1998	127	89.6
1999	97	89.6
2000	105	92.4
2001	100	92.4
2002	106	92.4
2003	82	92.4
2004	71	92.4
2005	118	92.4
2006	107	92.4
2007	90	92.4
2008	81	92.4
2009	64	92.4
2010	121	101.4
2011	108	101.4
2012	100	101.4
2013	85	101.4
2014	71	101.4
2015	96	101.4
2016	108	101.4
2017	89	101.4
2018	119	101.4
2019	117	101.4
2020	76	79.3
2021	78	79.3
2022	84	79.3

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

First to last qualifying date each year at Keo
Year	First date	Last date
1948	1948-04-06	1948-09-22
1949	1949-04-23	1949-10-19
1950	1950-05-17	1950-10-31
1951	1951-05-03	1951-10-17
1952	1952-04-29	1952-10-27
1953	1953-04-08	1953-10-22
1954	1954-03-11	1954-10-11
1955	1955-03-11	1955-11-13
1956	1956-04-28	1956-10-18
1957	1957-04-30	1957-09-21
1958	1958-05-14	1958-09-26
1959	1959-04-30	1959-10-10
1960	1960-04-06	1960-09-23
1961	1961-04-22	1961-10-31
1962	1962-04-20	1962-10-13
1963	1963-03-31	1963-10-27
1964	1964-05-17	1964-09-23
1965	1965-04-08	1965-10-09
1966	1966-03-31	1966-10-09
1967	1967-03-11	1967-10-05
1968	1968-04-18	1968-09-09
1969	1969-05-14	1969-10-12
1970	1970-05-05	1970-10-05
1971	1971-05-23	1971-10-03
1972	1972-04-12	1972-10-16
1973	1973-05-10	1973-10-10
1974	1974-03-31	1974-09-20
1975	1975-04-18	1975-10-15
1976	1976-05-22	1976-10-04
1977	1977-05-07	1977-10-01
1978	1978-04-07	1978-10-21
1979	1979-05-08	1979-10-21
1980	1980-04-22	1980-10-10
1981	1981-03-31	1981-10-05
1982	1982-05-21	1982-10-05
1983	1983-05-28	1983-10-03
1984	1984-04-27	1984-09-25
1985	1985-05-12	1985-10-14
1986	1986-05-07	1986-10-04
1987	1987-04-19	1987-09-18
1988	1988-05-12	1988-09-29
1989	1989-04-22	1989-09-09
1990	1990-04-29	1990-10-03
1991	1991-05-13	1991-10-03
1992	1992-05-16	1992-10-26
1993	1993-05-07	1993-10-01
1994	1994-04-26	1994-09-30
1995	1995-04-09	1995-10-02
1996	1996-04-19	1996-09-12
1997	1997-05-18	1997-10-12
1998	1998-05-12	1998-10-05
1999	1999-05-09	1999-09-29
2000	2000-04-19	2000-10-05
2001	2001-04-08	2001-09-22
2002	2002-04-14	2002-10-06
2003	2003-04-13	2003-10-24
2004	2004-05-07	2004-10-19
2005	2005-05-11	2005-10-19
2006	2006-04-16	2006-10-18
2007	2007-05-06	2007-10-06
2008	2008-05-19	2008-09-12
2009	2009-04-23	2009-10-08
2010	2010-05-05	2010-10-18
2011	2011-04-09	2011-10-18
2012	2012-04-02	2012-09-28
2013	2013-04-17	2013-09-25
2014	2014-05-05	2014-10-26
2015	2015-05-30	2015-10-16
2016	2016-05-25	2016-10-22
2017	2017-05-16	2017-10-27
2018	2018-05-07	2018-10-10
2019	2019-05-16	2019-10-11
2020	2020-05-25	2020-09-13
2021	2021-05-28	2021-10-11
2022	2022-05-10	2022-10-16

Every Fixed Threshold

Fixed thresholds at Keo
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	75	140	1953	84
35 C (95 F): Days	70	84	1954	19
40 C (104 F): Days	9	13	1954	1
90 F (32.2 C): Days	75	117	1954	61
100 F (37.8 C): Days	27	46	1954	5
0 C (32 F): Ice days (max	68	20	1978	7
0 C (32 F): Frost days (min	75	88	1968	69
-10 C (14 F): Days with min	54	12	1963	3
-20 C (-4 F): Days with min	2	2	1962	1
20 C (68 F): Tropical nights (min	75	124	1998	86
25 C (77 F): Days with min	47	18	1998	7
10 mm (0.39 in): Days with 10 mm or more rain	75	57	1957	42
25 mm (0.98 in): Days with 25 mm or more rain	75	30	2009	22
50 mm (1.97 in): Days with 50 mm or more rain	75	10	2009	5
100 mm (3.94 in): Days with 100 mm or more rain	26	2	1950	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1955	1
10 cm (3.9 in): Days with 10 cm or more snowfall	15	2	1966	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	2021	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1948.

Download the Data

Data for Keo 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Keo Threshold Days by Year (USC00033862)

Key Facts for Keo Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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