This combination of high temperature and low humidity is a real issue for tropical plants that are in the process of acclimatizing or rooting without plastic covers of foggers.
|Average relative humidity in Lyon, France|
|Average min and max temperatures in Lyon, France|
The sensation of being overheated ( like in the tropics ) will be stronger in Amsterdam - and really tropical - than in Lyon because this subjective effect , called the heat index, results from the higher vapor content of the surrounding air that does not allow the maximum amount of evaporation from the body. The chart below shows that in Amsterdam 32 Celsius and 75 % of humidity result in a perceived heat of 42 Celsius while in Lyon the same real temperature will be perceived as only 34 Celsius since the humidity will be 50% in this French town
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