Tripoli Threshold Days by Year (USC00138339)

18 fixed thresholds counted per year at Tripoli (USC00138339): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Tripoli Thresholds

Tripoli: days with a maximum temperature at or above 30 C (86 F) in 68 years, most in 1988 with 63.
Tripoli: days with a maximum temperature at or above 90 F (32.2 C) in 68 years, most in 1988 with 43.
Tripoli: days with a maximum temperature at or below 0 C (32 F) in 68 years, most in 1978 with 94.
Tripoli: nights with a minimum temperature at or below 0 C (32 F) in 68 years, most in 1988 with 178.
18 fixed thresholds have at least one qualifying day at Tripoli.

Days at or above 30 C (86 F)

68 years with a qualifying day

Days per year at Tripoli with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 63 in 1988.

Days at or above 30 C (86 F) per year at Tripoli
Year	Days	Decade average
1947	55	54.5
1949	54	54.5
1950	18	33.5
1951	14	33.5
1952	51	33.5
1953	43	33.5
1954	43	33.5
1955	59	33.5
1956	30	33.5
1957	27	33.5
1958	18	33.5
1959	32	33.5
1960	32	28.4
1961	33	28.4
1962	26	28.4
1963	33	28.4
1964	48	28.4
1965	20	28.4
1966	34	28.4
1967	11	28.4
1968	27	28.4
1969	20	28.4
1970	33	34.2
1971	39	34.2
1972	33	34.2
1973	28	34.2
1974	24	34.2
1975	45	34.2
1976	45	34.2
1977	33	34.2
1978	35	34.2
1979	27	34.2
1980	51	37.3
1981	22	37.3
1985	29	37.3
1986	20	37.3
1987	42	37.3
1988	63	37.3
1989	34	37.3
1990	18	24
1991	37	24
1992	10	24
1993	7	24
1994	21	24
1995	40	24
1996	17	24
1997	25	24
1998	32	24
1999	33	24
2000	25	27.1
2001	38	27.1
2004	13	27.1
2005	45	27.1
2006	31	27.1
2007	37	27.1
2008	17	27.1
2009	11	27.1
2010	29	32.1
2011	36	32.1
2012	52	32.1
2013	31	32.1
2014	14	32.1
2015	22	32.1
2016	32	32.1
2017	36	32.1
2018	40	32.1
2019	29	32.1
2020	47	47

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

First to last qualifying date each year at Tripoli
Year	First date	Last date
1947	1947-06-09	1947-10-21
1949	1949-04-25	1949-08-26
1950	1950-06-21	1950-10-18
1951	1951-07-07	1951-08-31
1952	1952-04-28	1952-09-30
1953	1953-05-25	1953-10-15
1954	1954-06-11	1954-09-27
1955	1955-05-19	1955-09-18
1956	1956-05-22	1956-08-27
1957	1957-06-21	1957-08-31
1958	1958-06-04	1958-08-28
1959	1959-05-02	1959-09-08
1960	1960-06-18	1960-09-08
1961	1961-05-12	1961-09-10
1962	1962-05-16	1962-09-12
1963	1963-05-08	1963-10-06
1964	1964-05-18	1964-09-09
1965	1965-05-01	1965-08-17
1966	1966-05-26	1966-09-01
1967	1967-05-18	1967-08-15
1968	1968-06-04	1968-08-23
1969	1969-05-27	1969-08-30
1970	1970-04-28	1970-09-20
1971	1971-06-04	1971-10-01
1972	1972-05-19	1972-09-16
1973	1973-06-07	1973-09-01
1974	1974-06-03	1974-08-27
1975	1975-05-18	1975-10-13
1976	1976-06-06	1976-10-01
1977	1977-05-13	1977-08-27
1978	1978-05-25	1978-09-11
1979	1979-06-03	1979-09-11
1980	1980-04-21	1980-09-09
1981	1981-04-27	1981-09-11
1985	1985-04-19	1985-09-20
1986	1986-06-01	1986-09-27
1987	1987-04-21	1987-08-22
1988	1988-05-22	1988-09-19
1989	1989-05-30	1989-08-23
1990	1990-06-13	1990-10-06
1991	1991-04-07	1991-09-08
1992	1992-05-02	1992-08-25
1993	1993-06-23	1993-08-27
1994	1994-04-19	1994-09-16
1995	1995-06-16	1995-09-14
1996	1996-05-17	1996-08-21
1997	1997-06-13	1997-10-07
1998	1998-05-15	1998-09-27
1999	1999-05-29	1999-09-05
2000	2000-06-02	2000-09-19
2001	2001-05-15	2001-08-10
2004	2004-04-17	2004-09-05
2005	2005-06-07	2005-10-05
2006	2006-06-03	2006-10-04
2007	2007-04-30	2007-10-07
2008	2008-06-08	2008-09-03
2009	2009-04-25	2009-08-15
2010	2010-05-24	2010-09-21
2011	2011-04-11	2011-09-13
2012	2012-05-16	2012-09-12
2013	2013-05-15	2013-09-11
2014	2014-05-31	2014-09-05
2015	2015-06-10	2015-09-17
2016	2016-05-07	2016-09-21
2017	2017-05-16	2017-10-03
2018	2018-05-25	2018-10-04
2019	2019-05-17	2019-10-01
2020	2020-06-02	2020-09-07

Every Fixed Threshold

Fixed thresholds at Tripoli
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	68	63	1988	47
35 C (95 F): Days	40	17	1947	1
40 C (104 F): Days	1	1	1988	1
90 F (32.2 C): Days	68	43	1988	16
100 F (37.8 C): Days	8	4	1955	2
0 C (32 F): Ice days (max	68	94	1978	59
0 C (32 F): Frost days (min	68	178	1988	172
-10 C (14 F): Days with min	68	95	2014	49
-20 C (-4 F): Days with min	68	43	2014	8
-30 C (-22 F): Days with min	30	9	1994	3
20 C (68 F): Tropical nights (min	68	26	1949	16
25 C (77 F): Days with min	7	1	1952	1
10 mm (0.39 in): Days with 10 mm or more rain	68	49	2018	27
25 mm (0.98 in): Days with 25 mm or more rain	68	23	2018	16
50 mm (1.97 in): Days with 50 mm or more rain	58	7	2008	1
100 mm (3.94 in): Days with 100 mm or more rain	12	2	1951	1
10 cm (3.9 in): Days with 10 cm or more snowfall	60	6	1994	1
25 cm (9.8 in): Days with 25 cm or more snowfall	7	1	1959	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1947.

Download the Data

Data for Tripoli 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).

Tripoli Threshold Days by Year (USC00138339)

Key Facts for Tripoli Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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