Long-term weather, typical weather
The climber's mate (climate) wouldn’t go up the mountain with her because of the weather.
The arctic climate has long, cold winters and short, cool summers. Some areas are covered by ice all year round while virtually every part will experience freezing temperatures at some point during the year.
Desert climates experience very little rain/precipitation. This results in less vegetation growth in these areas, which can then expose the ground to erosion from the wind, wearing away the ground's surface. Deserts will often experience large variations in temperature between day and night. We often think of deserts as being hot but they can also be cold.