The best time to trek or hike up to Lenin Peak Base Camp is during the summer months between July and early September. The temperatures at this time are warm and range from -5 to +5 degrees Celsius at night to 20-25 degrees during the daytime. The weather is relatively stable, but as this is a high mountain area it can change at any time so it is important to be prepared for this. This is also the time when the hiking trail is most safe from snow and ice.