Translation of "зною" in English

Не уступая ни дождю, ни ветру, ни снегу и ни зною лета, быть крепким телом, бескорыстным, не ведать гнева никогда и неизменно тихо улыбаться.

He's not beaten by the rain; he's not beaten by the wind; neither the snow nor the heat of the summer will beat him; his body is robust, without greed; he never angers, but is always serenely smiling.