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Guam August Weather

Averages and records for weather in Guam in the month of August.

Typical Guam August Weather 1991–2020
Average daily high	87.2 °F
Average daily low	76.5 °F
Average monthly precipitation	17.6 inches
Average monthly snow	none
Daily chance of precipitation	83.2%
Daily chance of snow	0%

Guam August Weather Records 1945–2024
Highest temperature	94 °F	August 30, 1994
Lowest temperature	70 °F	August 15, 1989
Highest daily low	83 °F	August 2, 2013
Lowest daily high	78 °F	August 7, 1985
Hottest average high temperature	89.9 °F	1994
Coldest average high temperature	82.7 °F	1975
Most daily precipitation	13.4 inches	August 28, 1992
Most monthly precipitation	38.5 inches	1997
Most daily snow	none	-
Most monthly snow	none	-

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
August 1	87.4	76.7	92	71
August 2	87.4	76.7	93	73
August 3	87.3	76.7	91	71
August 4	87.3	76.7	92	72
August 5	87.3	76.7	92	71
August 6	87.3	76.7	94	71
August 7	87.2	76.6	92	73
August 8	87.2	76.6	93	71
August 9	87.2	76.6	91	73
August 10	87.2	76.5	93	73
August 11	87.2	76.5	92	72
August 12	87.2	76.5	91	71
August 13	87.2	76.5	92	70
August 14	87.1	76.5	91	72
August 15	87.1	76.5	91	70
August 16	87.1	76.5	91	70
August 17	87.2	76.5	91	73
August 18	87.2	76.5	92	71
August 19	87.2	76.5	91	71
August 20	87.2	76.4	92	71
August 21	87.3	76.5	91	71
August 22	87.3	76.5	92	70
August 23	87.3	76.5	92	73
August 24	87.3	76.4	92	72
August 25	87.3	76.4	92	72
August 26	87.2	76.4	92	71
August 27	87.2	76.4	92	72
August 28	87.2	76.4	91	73
August 29	87.2	76.4	92	72
August 30	87.3	76.4	94	71
August 31	87.3	76.4	92	70

Weather Station Details

Years	Station	Coordinates
1945–2024	Guam International Airport	location