According to Le-Chatelier's principle increase in temperature favours the endothermic reaction while a decrease in temperature favour the exothermic reaction. Increase in pressure shifts the equilibrium in that side in which the number of moles of gaseous species decreases.
An endothermic reaction is accompanied by the absorption of heat whereas an exothermic reaction is accompanied by the evolution of heat.
When the temperature is increased for an endothermic reaction, the added heat is absorbed during the forward reaction. Total amount of heat in the system thus decreases and the temperature decreases. This nullifies the effect of increase in temperature. Hence, the increase in temperature favours the endothermic reaction.