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Guam December Weather

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

Typical Guam December Weather 1991–2020
Average daily high	86.8 °F
Average daily low	76.8 °F
Average monthly precipitation	6.3 inches
Average monthly snow	none
Daily chance of precipitation	72.2%
Daily chance of snow	0%

Guam December Weather Records 1945–2024
Highest temperature	91 °F	December 11, 2018
Lowest temperature	68 °F	December 31, 1962
Highest daily low	82 °F	December 18, 2018
Lowest daily high	77 °F	December 4, 1963
Hottest average high temperature	89.3 °F	1988
Coldest average high temperature	83.5 °F	1961
Most daily precipitation	19.7 inches	December 8, 2002
Most monthly precipitation	25.7 inches	2002
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
December 1	87.3	77.2	90	71
December 2	87.2	77.1	91	70
December 3	87.2	77.1	91	71
December 4	87.2	77.1	90	69
December 5	87.1	77.1	90	70
December 6	87.1	77.1	90	72
December 7	87.1	77.1	90	73
December 8	87.1	77.0	90	70
December 9	87.0	77.0	90	71
December 10	87.0	77.0	90	73
December 11	86.9	77.0	91	71
December 12	86.9	76.9	91	70
December 13	86.9	76.9	90	71
December 14	86.8	76.9	90	71
December 15	86.8	76.8	91	72
December 16	86.8	76.8	90	70
December 17	86.8	76.8	90	70
December 18	86.7	76.7	90	71
December 19	86.7	76.7	90	71
December 20	86.6	76.6	90	71
December 21	86.6	76.5	90	71
December 22	86.6	76.5	89	71
December 23	86.5	76.4	90	71
December 24	86.5	76.4	90	71
December 25	86.5	76.3	91	71
December 26	86.4	76.3	91	70
December 27	86.4	76.3	90	70
December 28	86.4	76.2	89	71
December 29	86.3	76.2	90	70
December 30	86.3	76.1	90	71
December 31	86.2	76.1	90	68

Weather Station Details

Years	Station	Coordinates
1945–2024	Guam International Airport	location