History:
Kullu (1220m) was once known as Kulanthpitha - `the end of the habitable world`. Beyond rose the forbidding heights of the Greater Himalayas, and by the banks of the shining river Beas, lay the fabled `Silver Valley`.
The Chinese pilgrim monk Xuanzang visited the Kullu Valley in 634 or 635 CE. He describes it as a fertile region completely surrounded by mountains, about 3,000 li in circuit, with a capital 14 or 15 li in circumference. It contained a tope built by Ashoka said to mark the place where the Buddha preached to the local people and made conversions. There were some twenty Buddhist Monasteries, with about 1,000 monks, most of whom were Mahayanist. There were also some fifteen Hindu temples and people of both faiths lived mixed together. There were meditation caves near the mountain passes inhabited by both Buddhist and Hindu practitioners. The country is said to have produced gold, silver, red copper, crystal lenses and bell-metal.
"Thus, Ku-zu is the Bu-nan name for Kuḷū. . . . Dr. Vogel in his MS. notes on Lahul gives Ku-zuṅ as the Gārī (Bu-nan) name of Kuḷū. Ku-zuṅ is the locative case of Ku-zu. He adds that Kuḷū is called Ram-ti by the people of Ti-nan, and Ram-di by those of Caṅsa (Me-rlog). The Tibetans call it Ñuṅ-ti."
Kullu got its first motorable access only after Indian Independence. The long centuries of seclusion have however allowed the area to retain a considerable measure of its traditional charm. The road through the Kullu Valley and Lahaul is now paved all the way connecting, and providing the major access route between the northern Indian plains to Leh in Ladakh.

Geography:
Kullu has an average elevation of 1,362 metres (4,469 feet). The town of Kullu lies on the bank of River Beas. A major tributary Sar-vari, (derived from "Shiv -Baardi") leads to the less explored and steeper Lug-valley on the west. On the east of Kullu lies a broad mountainous ridge having the village-temples of Bijli Mahadev, Mount Nag and Pueed. Beyond the ridge lies Manikaran valley, along the Parvati river which joins Beas in Bhuntar. On the South of Kullu lie towns of Bhuntar, Out(leading to Anni, Banjar and Siraj Valley) and Mandi(a separate district). Historically Kullu was accessible from Shimla via Siraj valley or through passes on the west leading to Jogindernagar and onto Kangra. To the north lies the famous town of Manali, which through the Rohtang pass leads onto the Lahaul and Spiti Valley. Once can see an enormous change in the climate as one climbs up the windward side of the ranges to proceed to the leeward and much drier plateaus to the north of Manali.

Weather:
Kullu WeatherKullu valley forms one of the most visited hill stations in India, owing to its pleasant weather and exquisite natural beauty. The place has three seasons in a year. Every season has its charm here and gives it a beauty in its own entirety. The most active season for tourism is summer, when tourists from across the globe flock in, in large numbers. During summer, nights are still cool and days a little bit warm. Seasonal changes resemble in flora too, with cherry blossom occurring during April and apple blossom being seen in early May. Let’s get more information on the weather and climate of Kullu.
Summer
Summer season in Kullu starts in March and lasts until June. During summers, the maximum temperature reaches 30 degree Celsius in the day, while the nights still retain a bit of chill. Summer is the season when tourists come in large number. When rest of India goes through extreme heat and hot blows of air, Kullu offers respite, with its cool and calm. Light woolen and cotton clothing is ideal during this weather condition.
Winter
Extreme weather is observed in Kullu during the winters, when the temperature goes down to freezing point. From December to February, Kullu observes heavy snowfall. During this period, major part of Kullu remains covered with the white blanket. However, the snow does not remain on the ground for a long time and tourists still can enjoy the fun of sightseeing. Heavy woolen clothes are required during this weather.
Monsoon
Kullu experiences rainy season from July to September. During rains, the weather over here becomes chilly, as the snow range is near. This is the time when the valley looks its most beautiful, with freshly washed leaves of trees. In this weather condition also, travelers are recommended to carry light woolen clothes to deter cold.