Guam weather in January - temperature, rain and is it a good time to visit?

January is one of the best months for a holiday in Guam.
Daytime
29°
Night
24°
🌊 Sea
29°
☀️ Day length
11 h 25 min
Chance of rain
68%
Thunder days
2%
Humid days
100%
WEATHER THROUGH THE YEARGuam - January vs the year29°24°29°24°30°25°30°25°31°26°31°26°30°26°30°25°30°25°30°25°31°26°30°25°CHANCE OF RAIN (%)686967736277818686847676JanFebMarAprMayJunJulAugSepOctNovDecWARMESTMay (31°)COLDESTJan (29°)DRIESTMay (62%)WETTESTAug (86%)world-prices.com · 2026-07-08 · ★ best months
In January, Guam averages about 29° during the day and 24° at night. Rain is fairly likely - around a 68% chance on a given day, so pack for showers. The sea is around 29°C - very warm for swimming.

Guam weather all year - average temperatures and rain

MonthDayNightChance of rain
January 29℃24℃68%
February ★ 29℃24℃69%
March ★ 30℃25℃67%
April ★ 30℃25℃73%
May 31℃26℃62%
June 31℃26℃77%
July 30℃26℃81%
August 30℃25℃86%
September 30℃25℃86%
October 30℃25℃84%
November 31℃26℃76%
December 30℃25℃76%
★ - months most often recommended for travel

Where is it warmest in Guam in January? Weather by city

PlaceDayNight🌊 SeaChance of rain
Dededovillage 30℃25℃29℃62%
Tamuningtumonharmonvillage 30℃25℃29℃62%
Yigovillage 28℃23℃29℃79%
Travelling soon? Check the live 14-day weather forecast for Guam.

Guam weather - other months

JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember