The best time to do the Gay trek to Everest Base Camp is between March to May and September to November, during the spring and autumn seasons, respectively. Autumn(September-November): The temperature ranges from -10 to 13 °C. The nights are colder than the days. It rarely rains at this time of the year. Spring(March-May): The temperature ranges from -8 to 18 °C. There is a clear blue sky at this time of year. Daytime temperatures are perfect for comfortable hikes. It rarely rains at this time of the year. Winter(November-February): The temperature fluctuates between -21 to 10 °C. Winters are dry, and the region gets snowfall during this time. Summer(May-August): The temperature ranges from -2 to 20 °C. The day is hot. The night temperature can be tolerated. Everest base camp gets the highest rain during this time.