word | | Climate |
| December | Costa Rica | tropical and subtropical; dry season (December to April); rainy season (May to November); cooler in highlands |
| December | Guam | tropical marine; generally warm and humid, moderated by northeast trade winds; dry season (January to June), rainy season (July to December); little seasonal temperature variation |
| December | Guinea | generally hot and humid; monsoonal-type rainy season (June to November) with southwesterly winds; dry season (December to May) with northeasterly harmattan winds |
| December | Guinea-Bissau | tropical; generally hot and humid; monsoonal-type rainy season (June to November) with southwesterly winds; dry season (December to May) with northeasterly harmattan winds |
| December | Indian Ocean | northeast monsoon (December to April), southwest monsoon (June to October); tropical cyclones occur during May/June and October/November in the northern Indian Ocean and January/February in the southern Indian Ocean |
| December | Kosovo | influenced by continental air masses resulting in relatively cold winters with heavy snowfall and hot, dry summers and autumns; Mediterranean and alpine influences create regional variation; maximum rainfall between October and December |
| December | Laos | tropical monsoon; rainy season (May to November); dry season (December to April) |
| December | Northern Mariana Islands | tropical marine; moderated by northeast trade winds, little seasonal temperature variation; dry season December to June, rainy season July to October |
| December | Pacific Ocean | ... a dry season during the winter months, when dry winds blow from the Asian landmass back to the ocean; tropical cyclones (typhoons) may strike southeast and east Asia from May to December |
| December | Papua New Guinea | tropical; northwest monsoon (December to March), southeast monsoon (May to October); slight seasonal temperature variation |
| December | Senegal | tropical; hot, humid; rainy season (May to November) has strong southeast winds; dry season (December to April) dominated by hot, dry, harmattan wind |
| December | Sierra Leone | tropical; hot, humid; summer rainy season (May to December); winter dry season (December to April) |