More detail on Visas 

London Heathrow 

Along the coast of the Mediterranean sea summers are hot with average temperatures around 30°C with high humidity. Winters are mild at 18 degrees .

The Libyan desert is one of the places with the most extreme and arid climate in the world, with significant temperature ranges between day and night. Summer temperatures can exceed 50°C, while in winter at night the temperatures are often below zero.

For a forecast prior to going 

The Libyan Dinar

However US$ are universally accepted