Naples Threshold Days by Year (USC00086078)

11 fixed thresholds counted per year at Naples (USC00086078): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Naples Thresholds

Naples: days with 10 mm (0.39 in) or more of precipitation in 73 years, most in 2017 with 60.
Naples: days with 25 mm (0.98 in) or more of precipitation in 73 years, most in 2017 with 29.
Naples: days with 50 mm (1.97 in) or more of precipitation in 72 years, most in 2017 with 14.
Naples: days with a maximum temperature at or above 30 C (86 F) in 70 years, most in 1975 with 249.
11 fixed thresholds have at least one qualifying day at Naples.

Days at or above 30 C (86 F)

70 years with a qualifying day

Days per year at Naples with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 249 in 1975.

Days at or above 30 C (86 F) per year at Naples
Year	Days	Decade average
1943	178	192.8
1944	186	192.8
1945	191	192.8
1946	209	192.8
1947	214	192.8
1949	179	192.8
1952	149	164.3
1953	163	164.3
1954	151	164.3
1955	158	164.3
1956	156	164.3
1957	181	164.3
1958	170	164.3
1959	186	164.3
1962	166	173.1
1963	177	173.1
1964	173	173.1
1965	192	173.1
1966	170	173.1
1967	168	173.1
1968	155	173.1
1969	184	173.1
1970	194	215
1971	198	215
1972	218	215
1973	213	215
1974	234	215
1975	249	215
1976	205	215
1977	210	215
1978	211	215
1979	218	215
1980	204	190.7
1981	205	190.7
1982	212	190.7
1983	189	190.7
1984	184	190.7
1985	199	190.7
1986	189	190.7
1987	159	190.7
1988	169	190.7
1989	197	190.7
1990	210	189.6
1991	201	189.6
1993	174	189.6
1994	211	189.6
1996	181	189.6
1997	188	189.6
1998	181	189.6
1999	171	189.6
2002	235	208.1
2003	242	208.1
2004	202	208.1
2005	182	208.1
2006	201	208.1
2007	195	208.1
2008	186	208.1
2009	222	208.1
2010	188	190.3
2011	210	190.3
2012	197	190.3
2013	205	190.3
2014	168	190.3
2015	210	190.3
2016	180	190.3
2017	165	190.3
2018	184	190.3
2019	196	190.3
2021	190	112
2026	34	112

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

First to last qualifying date each year at Naples
Year	First date	Last date
1943	1943-03-19	1943-11-07
1944	1944-03-05	1944-11-09
1945	1945-02-15	1945-11-12
1946	1946-04-01	1946-11-28
1947	1947-01-02	1947-12-09
1949	1949-03-24	1949-11-12
1952	1952-03-10	1952-10-19
1953	1953-03-07	1953-12-05
1954	1954-01-20	1954-10-27
1955	1955-03-10	1955-11-12
1956	1956-04-01	1956-10-25
1957	1957-01-24	1957-11-28
1958	1958-04-05	1958-12-08
1959	1959-02-08	1959-12-17
1962	1962-01-21	1962-10-22
1963	1963-03-03	1963-10-27
1964	1964-03-03	1964-12-17
1965	1965-02-13	1965-11-13
1966	1966-04-09	1966-11-12
1967	1967-04-04	1967-12-19
1968	1968-04-03	1968-11-29
1969	1969-03-17	1969-10-29
1970	1970-03-19	1970-11-02
1971	1971-01-04	1971-12-21
1972	1972-01-25	1972-12-16
1973	1973-01-01	1973-11-28
1974	1974-01-03	1974-11-19
1975	1975-01-23	1975-12-16
1976	1976-02-16	1976-12-13
1977	1977-03-05	1977-11-23
1978	1978-04-03	1978-12-10
1979	1979-02-21	1979-11-28
1980	1980-03-07	1980-11-26
1981	1981-02-17	1981-11-09
1982	1982-02-02	1982-12-07
1983	1983-01-01	1983-12-06
1984	1984-02-19	1984-12-26
1985	1985-03-06	1985-11-30
1986	1986-03-12	1986-12-10
1987	1987-04-14	1987-12-25
1988	1988-03-28	1988-12-31
1989	1989-01-14	1989-11-15
1990	1990-01-19	1990-12-30
1991	1991-01-05	1991-12-14
1993	1993-04-04	1993-11-22
1994	1994-03-22	1994-12-12
1996	1996-03-27	1996-11-08
1997	1997-02-19	1997-10-31
1998	1998-02-19	1998-12-07
1999	1999-03-28	1999-11-04
2002	2002-01-21	2002-12-08
2003	2003-02-17	2003-12-05
2004	2004-01-05	2004-12-11
2005	2005-01-08	2005-12-19
2006	2006-02-21	2006-12-25
2007	2007-01-07	2007-12-12
2008	2008-03-04	2008-12-26
2009	2009-03-11	2009-12-16
2010	2010-04-04	2010-12-01
2011	2011-02-04	2011-12-24
2012	2012-02-25	2012-12-11
2013	2013-01-09	2013-12-23
2014	2014-02-21	2014-12-31
2015	2015-03-11	2015-12-31
2016	2016-01-02	2016-12-21
2017	2017-03-01	2017-11-11
2018	2018-02-09	2018-12-30
2019	2019-01-03	2019-11-09
2021	2021-02-28	2021-12-18
2026	2026-01-24	2026-09-22

Every Fixed Threshold

Fixed thresholds at Naples
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	70	249	1975	34
35 C (95 F): Days	61	40	2002	1
90 F (32.2 C): Days	70	173	2002	12
0 C (32 F): Frost days (min	22	6	1981	2
20 C (68 F): Tropical nights (min	70	243	1947	22
25 C (77 F): Days with min	62	70	1949	4
10 mm (0.39 in): Days with 10 mm or more rain	73	60	2017	7
25 mm (0.98 in): Days with 25 mm or more rain	73	29	2017	2
50 mm (1.97 in): Days with 50 mm or more rain	72	14	2017	1
100 mm (3.94 in): Days with 100 mm or more rain	29	3	1962	1
200 mm (7.87 in): Days with 200 mm or more rain	4	1	1946	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1943.

Download the Data

Data for Naples 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).

Naples Threshold Days by Year (USC00086078)

Key Facts for Naples Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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