Snow is by far the worst possible terrain to settle near. It provides no benefits at all - no Woods, no Rivers, and only a few resources can be found there - though it may still have Lakes or coastlines. That said, some late-game strategic resources may be found in the Snow, sometimes making polar colonies worthwhile. Try to settle on Snow tiles only along the Coast, or in close proximity with other terrain types - otherwise, any city founded there will have neither Food nor Production, and you will be forced to develop it via Trade Routes only.
As a general rule, you should consider settling on a Snow tile only if you're playing as Sweden, trying to grab some rare Uranium that you don't already have in your empire, or planning to build the Amundsen-Scott Research Station. Notably, many city-states' unique improvements - such as the Alcázar, Trading Dome, and Mahavihara - can be built on Snow, so being the Suzerain of the city-states that unlock them will allow you to increase the yields of Snow tiles in your territory.
History offers very few examples of human survival in snow-covered lands in cold climates. With a few exceptions, such as the Inupiat, humans have had a hard time making a living in the far polar regions.
|Civilization VI Terrains |
|Base||Coast • Desert • Desert (Hills) • Grassland • Grassland (Hills) • Hills • Lake • Mountains • Nile River3 • Ocean • Plains • Plains (Hills) • Snow • Snow (Hills) • Tundra • Tundra (Hills)|
|Features||Cataract3 • Cliffs • Floodplains • Desert Floodplains • Grassland Floodplains • Plains Floodplains • Geothermal Fissure • Ice • Impact Zone1 2 • Marsh • Oasis • Rainforest • Burning Rainforest1 • Burnt Rainforest1 • Reef • River • Volcanic Soil • Volcano • Woods • Burning Woods1 • Burnt Woods1|
|Other||Barbarian Outpost • Meteor Site1 • Tribal Village|
|See also||Improvement • Natural Wonder • Resource|
|1 Requires a DLC • 2 Apocalypse mode only • 3 Specific Scenarios only|