Jill has range of climate zones that effect its territory, ranging from tropical to tempreate. Northern Jill experiences cool temperatures year round, with long, frigid winters that fuel large blizzards. Central Jill has a varying climate, which can be subtropical during the summer and autumn, the driving force behind the region's 9-month growing season; and easily as cold as the winters in Northern Jill as a result of massive winter storm systems moving southward. Southern Jill has very humid, wet summers that support the small patches of rainforest that are present in the area. Blizzards from the north do dump large amounts of snow on the south — at times, the snow can be excessive due to the extra atmospheric moisture in the region — which keeps Southern Jill's winters on the cold side. The extreme variation in temperatures in parts of central and southern Jill place it in the worldwide "extreme climate zone".
Jill's summer season ranges from moderate in the far north of the nation to moist and humid for most of the rest of the country. Temperatures during summer can reach in excess of 95° (Fahrenheit).
During the summer, the Tropical Jet Stream from the Southern Ocean becomes more powerful than the Northern Jet Stream from the colder northern nations and north pole, and holds control over Jill's climate. Moisture from both streams conflict with each other throughout summer, resulting in large thunderstorms that can wreak havoc on rural communities.