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Guam Weather Records

Guam weather averages and records from 1957–2022 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in Guam was 95 °F which occurred on September 19, 1957.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in Guam was 54 °F which occurred on March 14, 1965.
Lowest Temperatures: All-Time By Year
Guam Weather by Month
Averages based on the years 1991–2020
Month Average (°F) Record (°F) Average (inches)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧 Snow ❄️
January 85.7 75.0 90 56 5.3 0.0
February 85.7 74.6 90 59 4.1 0.0
March 86.7 75.4 92 54 2.8 0.0
April 87.9 76.7 93 59 3.3 0.0
May 88.5 77.5 93 62 4.5 0.0
June 88.5 77.7 94 63 6.6 0.0
July 87.7 76.8 94 64 12.3 0.0
August 87.0 76.1 92 63 17.7 0.0
September 87.0 76.0 95 61 15.2 0.0
October 87.2 76.3 93 64 12.7 0.0
November 87.4 77.0 92 62 8.3 0.0
December 86.6 76.5 91 61 6.0 0.0
Entire year 87.2 76.3 95 54 98.7 0.0
More Guam Weather Records
1957–2022
Highest daily low 84 °F July 28, 2013
Lowest daily high 75 °F January 25, 1976
Greatest daily range
(Difference of high and low)
31 °F March 14, 1965
Difference in high temperature
over two conscutive days
14 °F Sep 17–18, 2014
Most daily precipitation 19.7 inches December 8, 2002
Most monthly precipitation 38.5 inches August 1997
Most yearly precipitation 139.1 inches 2002
Most daily snow none -
Most days in a year ≥ 80 °F 366 2020
Most days in a year ≥ 90 °F 136 2016
Guam Weather Streaks
Most consecutive days...
With precipitation 53 days Aug 7 – Sep 28, 1990
Without precipitation 22 days Mar 9–30, 1965
High temperature ≥ 80 °F 1953 days Sep 22, 2008 – Jan 26, 2014
High temperature ≥ 90 °F 35 days May 23 – Jun 26, 2016
Guam Weather by Year
More
Weather Station Details
Years Station Coordinates
1957–2022 Guam International Airport location