| Country | Climate |
| Hong Kong | subtropical monsoon; cool and humid in winter, hot and rainy from spring through summer, warm and sunny in fall |
| Hungary | temperate; cold, cloudy, humid winters; warm summers |
| Iceland | temperate; moderated by North Atlantic Current; mild, windy winters; damp, cool summers |
| India | varies from tropical monsoon in south to temperate in north |
| 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 |
| Indonesia | tropical; hot, humid; more moderate in highlands |
| Iran | mostly arid or semiarid, subtropical along Caspian coast |
| Iraq | mostly desert; mild to cool winters with dry, hot, cloudless summers; northern mountainous regions along Iranian and Turkish borders experience cold winters with occasionally heavy snows that melt in early spring, sometimes causing extensive flooding in central and southern Iraq |
| Ireland | temperate maritime; modified by North Atlantic Current; mild winters, cool summers; consistently humid; overcast about half the time |
| Isle of Man | temperate; cool summers and mild winters; overcast about a third of the time |
| Israel | temperate; hot and dry in southern and eastern desert areas |
| Italy | predominantly Mediterranean; Alpine in far north; hot, dry in south |
| Jamaica | tropical; hot, humid; temperate interior |
| Jan Mayen | arctic maritime with frequent storms and persistent fog |
| Japan | varies from tropical in south to cool temperate in north |
| Jersey | temperate; mild winters and cool summers |
| Jordan | mostly arid desert; rainy season in west (November to April) |
| Kazakhstan | continental, cold winters and hot summers, arid and semiarid |
| Kenya | varies from tropical along coast to arid in interior |
| Kiribati | tropical; marine, hot and humid, moderated by trade winds |