Guam Weather Records

Guam weather averages and records from 1945–2023 based on data made available by the NOAA.

All-Time Recorded High

The highest temperature ever recorded in Guam was 96 °F which occurred on April 1, 1990.

Highest Temperatures: All-Time By Year

All-Time Recorded Low

The lowest temperature ever recorded in Guam was 65 °F which occurred on February 8, 1973.

Lowest Temperatures: All-Time By Year

Guam Weather by Month

Averages based on the years 1991–2020

Month	Average (°F)		Record (°F)		Average (inches)
Month	High ☀️	Low 🌙	High ☀️	Low 🌙	Precipitation 💧	Snow ❄️
January	85.9	75.4	94	66	5.0	0.0
February	86.0	75.0	93	65	3.9	0.0
March	86.9	75.6	93	66	2.7	0.0
April	88.1	76.9	96	68	3.4	0.0
May	88.6	77.8	94	70	4.3	0.0
June	88.7	78.1	95	70	7.1	0.0
July	87.9	77.1	95	70	12.2	0.0
August	87.2	76.5	94	70	17.6	0.0
September	87.2	76.3	94	70	15.1	0.0
October	87.4	76.8	93	67	12.7	0.0
November	87.6	77.3	92	68	8.1	0.0
December	86.8	76.8	91	68	6.3	0.0
Entire year	87.4	76.6	96	65	98.4	0.0

More Guam Weather Records 1945–2023
Highest daily low	84 °F	July 28, 2013
Lowest daily high	76 °F	February 3, 1978
Greatest daily range (Difference of high and low)	22 °F	March 4, 1973
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	139.3 inches	2004
Most daily snow	none	-
Most days in a year ≥ 80 °F	366	2020
Most days in a year ≥ 90 °F	187	1984

Guam Weather Streaks Most consecutive days...
With precipitation	55 days	Sep 29 – Nov 22, 1988
Without precipitation	18 days	Dec 6–23, 1977
High temperature ≥ 80 °F	1953 days	Sep 22, 2008 – Jan 26, 2014
High temperature ≥ 90 °F	61 days	Apr 23 – Jun 22, 1987

Guam Weather by Year

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Weather Station Details

Years	Station	Coordinates
1945–2023	Guam International Airport	location