Guayama 1SW Threshold Days by Year (RQC00664193)

10 fixed thresholds counted per year at Guayama 1SW (RQC00664193): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Guayama 1SW Thresholds

Guayama 1SW: days with 10 mm (0.39 in) or more of precipitation in 90 years, most in 1931 with 64.
Guayama 1SW: days with 25 mm (0.98 in) or more of precipitation in 90 years, most in 2010 with 28.
Guayama 1SW: days with 50 mm (1.97 in) or more of precipitation in 87 years, most in 2011 with 12.
Guayama 1SW: days with a maximum temperature at or above 30 C (86 F) in 84 years, most in 1963 with 359.
10 fixed thresholds have at least one qualifying day at Guayama 1SW.

Days at or above 30 C (86 F)

84 years with a qualifying day

Days per year at Guayama 1SW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 359 in 1963.

Days at or above 30 C (86 F) per year at Guayama 1SW
Year	Days	Decade average
1914	262	223.2
1915	285	223.2
1916	250	223.2
1917	196	223.2
1918	123	223.2
1920	198	210.9
1921	203	210.9
1922	54	210.9
1923	195	210.9
1924	244	210.9
1925	225	210.9
1926	298	210.9
1927	273	210.9
1928	243	210.9
1929	176	210.9
1930	272	271.1
1931	306	271.1
1932	294	271.1
1933	299	271.1
1934	300	271.1
1935	138	271.1
1936	322	271.1
1937	299	271.1
1938	266	271.1
1939	215	271.1
1940	242	309.5
1941	294	309.5
1943	333	309.5
1944	339	309.5
1945	325	309.5
1949	324	309.5
1950	303	342.5
1953	358	342.5
1954	343	342.5
1955	356	342.5
1956	343	342.5
1957	347	342.5
1958	346	342.5
1959	344	342.5
1960	353	333.3
1961	351	333.3
1962	327	333.3
1963	359	333.3
1964	358	333.3
1965	348	333.3
1966	344	333.3
1967	323	333.3
1968	260	333.3
1969	310	333.3
1970	289	268.8
1971	263	268.8
1972	261	268.8
1973	273	268.8
1974	258	268.8
1980	325	313
1981	324	313
1983	290	313
1994	233	240.7
1995	261	240.7
1996	231	240.7
1997	265	240.7
1998	231	240.7
1999	223	240.7
2000	258	280.9
2001	273	280.9
2002	306	280.9
2003	303	280.9
2004	276	280.9
2005	271	280.9
2006	281	280.9
2007	322	280.9
2008	244	280.9
2009	275	280.9
2010	331	323.9
2011	327	323.9
2012	331	323.9
2013	306	323.9
2014	318	323.9
2015	353	323.9
2019	301	323.9
2023	292	289.5
2024	329	289.5
2025	310	289.5
2026	227	289.5

For each year, a bar from the first to the last day at Guayama 1SW meeting 30 C (86 F).

First to last qualifying date each year at Guayama 1SW
Year	First date	Last date
1914	1914-01-01	1914-12-23
1915	1915-01-23	1915-12-26
1916	1916-01-04	1916-12-31
1917	1917-01-01	1917-12-24
1918	1918-01-02	1918-10-10
1920	1920-01-03	1920-12-21
1921	1921-01-07	1921-12-30
1922	1922-01-02	1922-11-26
1923	1923-02-07	1923-12-31
1924	1924-01-01	1924-12-23
1925	1925-02-07	1925-12-31
1926	1926-01-01	1926-12-31
1927	1927-01-01	1927-12-30
1928	1928-01-06	1928-12-29
1929	1929-02-25	1929-11-30
1930	1930-01-05	1930-12-31
1931	1931-01-01	1931-12-31
1932	1932-01-01	1932-12-31
1933	1933-01-01	1933-12-25
1934	1934-01-01	1934-12-31
1935	1935-01-01	1935-12-31
1936	1936-01-02	1936-12-27
1937	1937-02-03	1937-12-31
1938	1938-01-10	1938-12-17
1939	1939-01-16	1939-12-31
1940	1940-01-01	1940-11-28
1941	1941-01-26	1941-12-31
1943	1943-01-01	1943-12-31
1944	1944-01-01	1944-12-31
1945	1945-01-03	1945-12-30
1949	1949-01-01	1949-12-31
1950	1950-01-01	1950-12-31
1953	1953-01-01	1953-12-31
1954	1954-01-01	1954-12-31
1955	1955-01-01	1955-12-31
1956	1956-01-01	1956-12-28
1957	1957-01-01	1957-12-31
1958	1958-01-01	1958-12-31
1959	1959-01-01	1959-12-31
1960	1960-01-01	1960-12-31
1961	1961-01-01	1961-12-29
1962	1962-01-02	1962-12-31
1963	1963-01-01	1963-12-31
1964	1964-01-01	1964-12-31
1965	1965-01-02	1965-12-31
1966	1966-01-01	1966-12-31
1967	1967-01-01	1967-12-19
1968	1968-01-11	1968-12-31
1969	1969-01-01	1969-12-31
1970	1970-01-01	1970-11-30
1971	1971-01-01	1971-12-29
1972	1972-01-01	1972-12-31
1973	1973-01-01	1973-12-31
1974	1974-01-01	1974-12-17
1980	1980-01-02	1980-12-30
1981	1981-01-03	1981-12-30
1983	1983-01-04	1983-12-30
1994	1994-01-06	1994-12-13
1995	1995-01-01	1995-12-31
1996	1996-01-01	1996-12-31
1997	1997-01-01	1997-12-31
1998	1998-01-02	1998-12-28
1999	1999-02-25	1999-12-31
2000	2000-02-14	2000-12-31
2001	2001-01-03	2001-12-30
2002	2002-01-01	2002-12-31
2003	2003-01-01	2003-12-27
2004	2004-01-15	2004-12-31
2005	2005-01-01	2005-12-31
2006	2006-01-01	2006-12-29
2007	2007-01-01	2007-12-30
2008	2008-01-04	2008-12-27
2009	2009-01-05	2009-12-30
2010	2010-01-01	2010-12-29
2011	2011-01-01	2011-12-31
2012	2012-01-01	2012-12-31
2013	2013-01-01	2013-12-31
2014	2014-01-01	2014-12-31
2015	2015-01-01	2015-12-31
2019	2019-01-02	2019-12-31
2023	2023-02-01	2023-12-31
2024	2024-01-02	2024-12-28
2025	2025-01-03	2025-12-27
2026	2026-01-01	2026-10-15

Every Fixed Threshold

Fixed thresholds at Guayama 1SW
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	84	359	1963	227
35 C (95 F): Days	40	19	1944	4
90 F (32.2 C): Days	83	266	1960	122
20 C (68 F): Tropical nights (min	84	365	2003	273
25 C (77 F): Days with min	84	194	2015	87
10 mm (0.39 in): Days with 10 mm or more rain	90	64	1931	18
25 mm (0.98 in): Days with 25 mm or more rain	90	28	2010	5
50 mm (1.97 in): Days with 50 mm or more rain	87	12	2011	2
100 mm (3.94 in): Days with 100 mm or more rain	40	4	1944	2
200 mm (7.87 in): Days with 200 mm or more rain	8	1	1928	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1914.

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Data for Guayama 1SW 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).

Guayama 1SW Threshold Days by Year (RQC00664193)

Key Facts for Guayama 1SW Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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