Plan your trip to the beach with this snapshot of the seasons in Cairo: The hottest months are usually July and August, with an average temperature of 30°C, while the coldest months are January and February, with an average of 16°C. Between January and March, the daytime average is 25°C and the night-time average is 10°C. Between April and June, temperatures average 37°C during the day and 15°C at night. Between July and September, the temperature averages 38°C during the day and 23°C at night. Between October and December, the average temperature is 31°C during the day and 12°C at night.