Guam weather in January
Monthly temperatures, rain, humidity, what to wear and what to pack — 2024–2025 historical average
Guam January weather at a glance
In January, Guam averages 27.3°C, with typical highs of 30.2°C and lows of 25.2°C. The historical average is 12 wet days and 73% humidity.
Guam January temperature & humidity
Guam January rain & wet days
Pack a compact umbrella. Keep an indoor stop available between outdoor activities.
What to wear in Guam in January
Expect intense heat. Pack lightweight quick-dry clothing, sun protection and a refillable bottle. Showers are possible, so a compact umbrella is useful.
- DaytimeBreathable short sleeves, hat and sunscreen · average high 30.2°C
- Morning & eveningLight layer for air-conditioned rooms · average low 25.2°C
- FootwearComfortable walking shoes; quick-dry footwear for rainy days.
Packing essentials
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Guam January sunrise & sunset times
2026 January · Local time (Pacific/Guam)
| Date | Sunrise | Sunset | Daylight |
|---|---|---|---|
| 2026-01-01 | 06:44 | 18:05 | 11h 21m |
| 2026-01-15 | 06:48 | 18:13 | 11h 25m |
| 2026-01-31 | 06:48 | 18:21 | 11h 33m |
For sunset photos, arrive before the listed sunset time. Clouds, mountains and buildings can change when the sun becomes visible or disappears.
Calculated for the city coordinates with daylight saving applied. SunCalc · tz-lookup
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Best months to visit Guam
Bar height shows our simple weather-comfort score, not a safety rating; colour shows temperature.
January weather by year
Daily weather in 2025
Daily high and low temperatures; blue labels show precipitation
Frequently asked questions
What is Guam weather like in January?
In January, Guam averages 27.3°C, with typical highs of 30.2°C and lows of 25.2°C. The historical average is 12 wet days and 73% humidity. Our weather-comfort rating for this month is fair.
Does it rain a lot in Guam in January?
There are about 12 wet days in January. A compact umbrella is still useful.
What should I wear in Guam in January?
Expect intense heat. Pack lightweight quick-dry clothing, sun protection and a refillable bottle. Showers are possible, so a compact umbrella is useful.
What are the best months to visit Guam?
No months meet the A or B threshold in our temperature-and-precipitation score. Compare the monthly values with your planned activities.
Where can I check Guam weather in January in real time?
Check local webcams for the view right now and a local weather service for today’s forecast. Monthly temperatures here are historical averages.
What time are sunrise and sunset in Guam in January?
On 2026-01-15, calculated sunrise is 06:48 and sunset is 18:13 in local time (Pacific/Guam). Times vary by date and terrain.
Guam weather by month
More Americas destinations in January
Open-Meteo (CC BY 4.0) · 2024–2025 historical data, aggregated and rounded by this site. Not a forecast or long-term climate normal. Calculation method and limitations