Guam September 20 Weather Records

Daily averages and all-time records for weather in Guam for the date of September 20.

September 20 All-Time Records
1945–2024

91 °F

73 °F

79 °F

Highest daily low

80 °F

8.21 inches

Most snow

none

September 20 Average Weather
1991–2020 ¹

Average high

87.1 °F

Average low

76.4 °F

Chance precipitation

84.0%

Chance snow

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2023	87	77	0.45	0.0
2022	88	74	0.23	0.0
2021	90	78	0.00	0.0
2020	86	77	0.19	0.0
2019	86	77	0.07	0.0
2018	90	80	0.31	0.0
2017	86	77	0.27	0.0
2016	89	80	0.24	0.0
2015	83	76	2.65	0.0
2014	90	79	0.00	0.0
2013	82	76	8.21	0.0
2012	88	78	0.01	0.0
2011	85	79	0.02	0.0
2010	88	77	0.09	0.0
2009	85	77	0.15	0.0
2008	86	76	0.60	0.0
2007	87	75	0.22	0.0
2006	90	76	0.00	0.0
2005	83	76	0.86	0.0
2004	82	76	2.90	0.0
2003	87	76	0.13	0.0
2002	80	74	4.72	0.0
2001	81	75	0.70	0.0
2000	88	76	0.12	0.0
1999	87	77	0.03	0.0
1998	89	77	0.25	0.0
1997	86	77	0.08	0.0
1996	88	76	2.84	0.0
1995	91	76	1.32	0.0
1994	85	74	2.84	0.0
1993	89	80	0.06	0.0
1992	88	75	0.14	0.0
1991	87	74	0.39	0.0
1990	87	74	0.16	0.0
1989	91	74	0.00	0.0
1988	91	74	0.49	0.0
1987	91	78	0.07	0.0
1986	91	75	0.25	0.0
1985	90	76	0.05	0.0
1984	89	75	0.48	0.0
1983	89	78	0.21	0.0
1982	89	76	0.00	0.0
1981	86	77	0.37	0.0
1980	85	77	0.05	0.0
1979	89	75	1.46	0.0
1978	89	75	0.00	0.0
1977	87	76	0.25	0.0
1976	89	78	0.03	0.0
1975	84	78	0.21	0.0
1974	85	78	4.92	0.0
1973	88	77	0.32	0.0
1972	84	75	1.22	0.0
1971	88	77	0.81	0.0
1970	88	74	0.55	0.0
1969	91	77	0.00	0.0
1968	89	77	0.00	0.0
1967	88	75	0.96	0.0
1966	89	79	0.07	0.0
1965	88	76	0.19	0.0
1964	87	73	0.63	0.0
1963	88	76	0.38	0.0
1962	87	79	0.19	0.0
1961	86	75	0.00	0.0
1960	86	76	0.56	0.0
1959	85	76	0.05	0.0
1958	82	74	1.81	0.0
1957	89	78	0.00	0.0
1956	83	74	0.82	n/a
1955	88	74	0.02	n/a
1954	79	75	2.49	n/a
1953	84	76	0.50	n/a
1952	86	77	0.00	n/a
1951	87	77	0.24	n/a
1950	83	74	0.33	n/a
1949	89	74	0.02	n/a
1948	87	76	0.00	n/a
1947	87	79	0.35	n/a
1946	n/a	n/a	n/a	n/a
1945	87	78	0.00	n/a

What's the all-time high for Guam on 9/20?

For the date of Sep 20, the highest temperature ever reached in Guam history is 91 °F which has happened 6 times, most recently in 1995.

Highest Temperatures in Guam on September 20

What's the all-time low for Guam on 9/20?

For the date of Sep 20, the lowest temperature ever reached in Guam history is 73 °F which happened in 1964.

Lowest Temperatures in Guam on September 20

Lowest High Temperatures in Guam on September 20

What's the most it has ever rained in Guam on 9/20?

For the date of Sep 20, the most precipitation ever recorded in Guam history is 8.21 inches which happened in 2013.

All-Time Most Precipitation in Guam on September 20

Weather Station Details

Years	Station	Coordinates
1945–2024	Guam International Airport	location