diurnal ranges of temperature
High desert areas typically have the greatest diurnal temperature variations. Low lying, humid areas typically have the least. This explains why an area like the Snake River Plain can have high temperatures of 38 Â°C (100 Â°F) during a summer day, and then have lows of 5â10 Â°C (41â50 Â°F).t the same time, Washington D.C. , which is much more humid, has temperature variations of only 8 Â°C (14 Â°F); urban Hong Kong has a diurnal temperature range of little more than 4 Â°C (7 Â°F).