Guam January Weather

Averages and records for weather in Guam in the month of January.
Typical Guam January Weather
1991–2020
Average daily high 85.9 °F
Average daily low 75.4 °F
Average monthly precipitation 5.0 inches
Average monthly snow none
Daily chance of precipitation 63.1%
Daily chance of snow 0%
Guam January Weather Records
1945–2024
Highest temperature 94 °F January 9, 1989
Lowest temperature 66 °F January 18, 2000
Highest daily low 81 °F January 11, 1985
Lowest daily high 77 °F January 19, 1970
Hottest average high temperature 89.2 °F 1989
Coldest average high temperature 82.5 °F 1959
Most daily precipitation 7.4 inches January 14, 1990
Most monthly precipitation 18.1 inches 1976
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)
High Low High Low
January 1 86.2 76.0 90 70
January 2 86.2 76.0 90 72
January 3 86.2 75.9 90 70
January 4 86.1 75.9 91 70
January 5 86.1 75.8 91 70
January 6 86.1 75.8 90 70
January 7 86.0 75.7 90 69
January 8 86.0 75.7 91 70
January 9 86.0 75.7 94 70
January 10 86.0 75.6 91 70
January 11 86.0 75.6 90 70
January 12 86.0 75.5 90 71
January 13 86.0 75.5 89 68
January 14 85.9 75.5 89 71
January 15 85.9 75.4 89 70
January 16 85.9 75.4 89 70
January 17 85.9 75.4 90 68
January 18 85.9 75.4 89 66
January 19 85.9 75.4 90 69
January 20 85.9 75.4 91 71
January 21 85.9 75.3 89 68
January 22 85.8 75.3 89 71
January 23 85.8 75.3 89 68
January 24 85.8 75.3 89 68
January 25 85.8 75.3 89 70
January 26 85.8 75.3 89 72
January 27 85.8 75.2 89 70
January 28 85.8 75.2 89 68
January 29 85.8 75.2 89 67
January 30 85.8 75.2 90 69
January 31 85.8 75.2 89 70
Weather Station Details
Years Station Coordinates
1945–2024 Guam International Airport location