Guam December 21 Weather Records

Daily averages and all-time records for weather in Guam for the date of December 21.

December 21 All-Time Records
1945–2024

90 °F

71 °F

82 °F

Highest daily low

81 °F

11.24 inches

Most snow

none

December 21 Average Weather
1991–2020 ¹

Average high

86.6 °F

Average low

76.5 °F

Chance precipitation

70.0%

Chance snow

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2023	86	76	0.15	0.0
2022	84	76	0.20	0.0
2021	87	74	0.07	0.0
2020	87	78	0.00	0.0
2019	85	78	0.01	0.0
2018	88	80	0.20	0.0
2017	87	80	0.09	0.0
2016	87	79	0.11	0.0
2015	88	77	0.00	0.0
2014	89	81	0.01	0.0
2013	86	77	0.03	0.0
2012	88	76	0.03	0.0
2011	88	78	0.04	0.0
2010	87	76	1.70	0.0
2009	88	75	0.00	0.0
2008	88	77	0.16	0.0
2007	88	77	0.00	0.0
2006	87	77	0.36	0.0
2005	86	77	0.06	0.0
2004	84	72	0.00	0.0
2003	86	76	1.13	0.0
2002	82	77	0.46	0.0
2001	87	76	0.10	0.0
2000	86	77	0.09	0.0
1999	86	78	0.03	0.0
1998	87	78	0.01	0.0
1997	85	76	0.12	0.0
1996	83	75	0.06	0.0
1995	87	76	0.00	0.0
1994	84	75	0.11	0.0
1993	86	75	0.12	0.0
1992	83	76	0.13	0.0
1991	86	71	0.18	0.0
1990	83	75	11.24	0.0
1989	87	71	0.00	0.0
1988	89	76	0.27	0.0
1987	87	74	0.32	0.0
1986	86	75	0.00	0.0
1985	89	78	0.00	0.0
1984	87	75	0.10	0.0
1983	90	76	0.00	0.0
1982	86	74	0.05	0.0
1981	88	80	0.02	0.0
1980	86	77	0.68	0.0
1979	84	73	0.97	0.0
1978	85	76	0.00	0.0
1977	83	75	0.00	0.0
1976	86	77	0.51	0.0
1975	84	78	0.01	0.0
1974	84	79	0.00	0.0
1973	85	79	0.19	0.0
1972	87	74	0.00	0.0
1971	88	78	0.05	0.0
1970	85	78	0.11	0.0
1969	84	76	0.10	0.0
1968	84	75	0.03	0.0
1967	86	73	0.00	0.0
1966	84	77	0.11	0.0
1965	87	75	0.09	0.0
1964	87	74	0.00	0.0
1963	85	72	0.03	0.0
1962	88	79	0.04	0.0
1961	84	76	0.04	0.0
1960	86	77	0.04	0.0
1959	84	75	0.00	0.0
1958	86	76	0.00	0.0
1957	84	75	0.18	0.0
1956	82	76	0.06	n/a
1955	83	76	0.08	n/a
1954	85	75	0.03	n/a
1953	84	76	0.18	n/a
1952	86	73	0.14	n/a
1951	86	76	0.03	n/a
1950	85	75	0.02	n/a
1949	85	76	0.02	n/a
1948	83	75	0.10	n/a
1947	83	77	0.29	n/a
1946	n/a	n/a	n/a	n/a
1945	86	76	0.12	n/a

What's the all-time high for Guam on 12/21?

For the date of Dec 21, the highest temperature ever reached in Guam history is 90 °F which happened in 1983.

Highest Temperatures in Guam on December 21

What's the all-time low for Guam on 12/21?

For the date of Dec 21, the lowest temperature ever reached in Guam history is 71 °F which has happened 2 times, most recently in 1991.

Lowest Temperatures in Guam on December 21

Lowest High Temperatures in Guam on December 21

What's the most it has ever rained in Guam on 12/21?

For the date of Dec 21, the most precipitation ever recorded in Guam history is 11.24 inches which happened in 1990.

All-Time Most Precipitation in Guam on December 21

Weather Station Details

Years	Station	Coordinates
1945–2024	Guam International Airport	location