Guam Weather Records

Guam weather averages and records from 1957–2023 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)
Month	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 1957–2023
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

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Weather Station Details

Years	Station	Coordinates
1957–2023	Guam International Airport	location