Weather in Guam in december
Country-wide climate normals across 15 cities in Guam.
How Hot Is Guam in december?
Uniform heat across Guam's December: averages climb to 29°C nationally with overnight lows of 27°C, narrow spread from coast to interior. The hottest cities like Apra Harbor register similar readings to the coolest, so plan for consistently hot weather across the country.
Sunshine in Guam in december
Persistent cloud and grey skies define Guam's December: about 1.0h of sun a day in Dededo Village. Daylight is in short supply too, running from 6:35 am to 5:55 pm, and most regions of the country see similar overcast conditions. Bright stretches are uncommon and brief.
Does It Rain In Guam In december?
Wet conditions dominate Guam in December — Dededo Village sees 151mm of rain across 22 days, with rain a near-daily feature in most regions. Some areas see considerably more, particularly mountain-facing or windward coasts. Plan around frequent showers and pack reliable rainwear.
Is Guam Humid In december?
Guam is enveloped in tropical-thick humidity through December: Dededo Village averages 78%, and most of the country tracks similarly. The constant moisture makes warm temperatures feel substantially hotter, and even nights bring limited cooling. Light cotton clothing is essential.
Wind In Guam In december
Persistent breeze shapes Guam's December: 29 kph in Dededo Village, with consistent wind across the country. The conditions are ideal for sailing and other wind sports, but can be disruptive for fine outdoor work.
Cloud Cover In Guam In december
Guam's December is dominated by overcast skies: Dededo Village averages 77% cloud cover, with similar grey persistence across the country. Days feel dim and soft-lit, with little break in the cloud deck.