Weather in เฟรนช์เกียนา in ธันวาคม
Country-wide climate normals across 15 cities in เฟรนช์เกียนา.
How Hot Is เฟรนช์เกียนา in ธันวาคม?
เฟรนช์เกียนา bakes evenly in December — highs around 29°C are typical from Iracoubo all the way to Grand-Santi, with very little regional variation. Lows sit around 23°C even overnight, and the country's small geographic footprint means there are no significant climate pockets. Expect uniform heat day and night.
Sunshine in เฟรนช์เกียนา in ธันวาคม
Dark, overcast days dominate เฟรนช์เกียนา in December — Cayenne sees just 0.6h of sun a day, and the pattern is similar across most regions. Cloud cover is heavy and persistent, with even the brighter regions struggling to escape the gloom for long.
Does It Rain In เฟรนช์เกียนา In ธันวาคม?
Heavy seasonal rains saturate เฟรนช์เกียนา in December — Cayenne averages 366mm of rain across 28 days, with downpours an almost daily feature. The pattern is consistent across most regions, particularly along monsoon-affected coasts. Expect torrential afternoon storms followed by humid heat.
Is เฟรนช์เกียนา Humid In ธันวาคม?
เฟรนช์เกียนา is enveloped in tropical-thick humidity through December: Cayenne averages 87%, 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 เฟรนช์เกียนา In ธันวาคม
เฟรนช์เกียนา's December has gentle wind — Cayenne averages 12 kph, and the country tracks similarly. Outdoor activity is comfortable, and afternoon thermals add a pleasant breeze in inland areas.
Cloud Cover In เฟรนช์เกียนา In ธันวาคม
Heavy overcast covers เฟรนช์เกียนา in December: 80% cloud cover in Cayenne, with similar grey conditions in most regions. Direct sun is rare, and the pattern is persistent across the country. Coastal and northern regions feel especially heavy.