Guam September 21 Weather Records

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

September 21 All-Time Records
1945–2024

92 °F

72 °F

79 °F

Highest daily low

79 °F

3.16 inches

Most snow

none

September 21 Average Weather
1991–2020 ¹

Average high

87.1 °F

Average low

76.4 °F

Chance precipitation

84.3%

Chance snow

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2023	87	75	2.74	0.0
2022	89	77	0.03	0.0
2021	90	78	0.00	0.0
2020	81	75	1.64	0.0
2019	87	76	0.00	0.0
2018	88	77	1.72	0.0
2017	89	78	0.28	0.0
2016	91	79	0.20	0.0
2015	87	77	0.06	0.0
2014	90	78	0.16	0.0
2013	81	75	1.74	0.0
2012	86	75	1.69	0.0
2011	87	74	1.39	0.0
2010	88	75	0.12	0.0
2009	84	73	1.10	0.0
2008	79	74	0.90	0.0
2007	89	76	0.01	0.0
2006	88	76	0.14	0.0
2005	85	76	0.85	0.0
2004	85	77	1.37	0.0
2003	86	76	0.06	0.0
2002	86	77	0.00	0.0
2001	87	74	0.27	0.0
2000	87	76	0.33	0.0
1999	86	74	0.00	0.0
1998	89	77	0.27	0.0
1997	88	75	0.00	0.0
1996	89	79	0.00	0.0
1995	88	74	3.16	0.0
1994	88	75	1.04	0.0
1993	89	79	0.00	0.0
1992	88	75	0.09	0.0
1991	89	79	0.03	0.0
1990	89	75	0.01	0.0
1989	90	76	0.77	0.0
1988	91	75	0.30	0.0
1987	89	75	1.24	0.0
1986	89	74	1.02	0.0
1985	92	78	0.56	0.0
1984	91	72	2.59	0.0
1983	83	74	2.62	0.0
1982	89	76	0.17	0.0
1981	88	79	0.39	0.0
1980	91	75	0.00	0.0
1979	88	77	0.15	0.0
1978	89	78	0.05	0.0
1977	88	78	0.00	0.0
1976	88	76	0.22	0.0
1975	84	78	0.03	0.0
1974	84	77	0.45	0.0
1973	87	79	0.07	0.0
1972	85	78	0.00	0.0
1971	88	78	0.74	0.0
1970	85	76	0.13	0.0
1969	91	78	0.00	0.0
1968	90	76	0.12	0.0
1967	88	73	0.48	0.0
1966	82	72	1.10	0.0
1965	88	74	0.00	0.0
1964	88	73	0.05	0.0
1963	88	76	0.03	0.0
1962	89	76	0.23	0.0
1961	86	77	0.11	0.0
1960	86	77	0.88	0.0
1959	88	76	0.05	0.0
1958	83	77	1.47	0.0
1957	88	77	0.16	0.0
1956	84	74	0.16	n/a
1955	85	75	0.56	n/a
1954	81	75	0.25	n/a
1953	84	74	1.32	n/a
1952	88	78	0.00	n/a
1951	88	78	0.00	n/a
1950	86	75	0.00	n/a
1949	87	75	0.62	n/a
1948	79	74	1.58	n/a
1947	88	77	0.00	n/a
1946	n/a	n/a	n/a	n/a
1945	88	76	0.00	n/a

What's the all-time high for Guam on 9/21?

For the date of Sep 21, the highest temperature ever reached in Guam history is 92 °F which happened in 1985.

Highest Temperatures in Guam on September 21

What's the all-time low for Guam on 9/21?

For the date of Sep 21, the lowest temperature ever reached in Guam history is 72 °F which has happened 2 times, most recently in 1984.

Lowest Temperatures in Guam on September 21

Lowest High Temperatures in Guam on September 21

What's the most it has ever rained in Guam on 9/21?

For the date of Sep 21, the most precipitation ever recorded in Guam history is 3.16 inches which happened in 1995.

All-Time Most Precipitation in Guam on September 21

Weather Station Details

Years	Station	Coordinates
1945–2024	Guam International Airport	location