The state of Idaho has much variation in its climate. Even though the state is located 300 miles away from the Pacific Ocean, the maritime influence is still felt in the state especially in the winter when cloud cover, humidity, and precipitation are at its highest point. Conversely, this influence has a moderating effect in the winter where temperatures are not as low as would be expected for a state with a mostly elevated altitude. This maritime influence is lowest in the southeastern part of the state where the precipitation patterns are often reversed with wetter summers and drier winters and seasonal temperature differences more extreme, showing a more continental climate.
Summers in Idaho can be hot, although extended periods over 100 °F (38 °C) or the maximum temperature are rare. This is tempered by the low relative humidity during summer months and also by the cooler evenings, since for most of the state, the highest diurnal difference in temperature is often in the summer. Winters can be cold, although extended periods of bitter cold weather below zero are unusual.