Nepal’s weather is generally predictable and pleasant. There are four climatic seasons: March to May (spring), June to August (summer), September to November (autumn) and December to February (winter). The monsoon is approximately from the end of June to the middle of September. About 80 per cent of the rain falls during that period, so the remainder of the year is dry. Spring and autumn are the most pleasant seasons; winter temperatures drop to freezing with a high level of snowfall in the mountains. Summer and late spring temperatures range from 28ºC (83ºF) in the hill regions
to more than 40ºC (104ºF) in the Terai. In winter, average maximum and minimum temperatures in the Terai range from a brisk 7ºC (45ºF) to a mild 23ºC (74ºF). The central valleys experience a minimum temperature often falling bellow freezing point and a chilly 12ºC (54ºF) maximum. Much colder temperatures prevail at higher elevations. The Kathmandu Valley, at an altitude of 1310m (4297ft), has a mild climate, ranging from 19-27ºC (67-81ºF) in summer, and 2-20ºC (36-68ºF) in winter.
Required clothing
Lightweight and tropical clothes with umbrella are advised for June to August. Between October and March, lightweight clothes are worn in Kathmandu, with a coat for evenings and warm clothing for the mountains.
Climate
It is difficult to accurately generalize the climate of Bhutanbecause of the variations in elevations and seasons. outhern Bhutanhas a tropical climate with hot humid monsoons. Spring in the higher valleys (mid-March to May) has warm days (20 °C) and cool nights. June marks the beginning of summer when day temperatures warm up to 27 - 29 °C. By July, the rainy season starts and continue till mid-September. The autumn months of September to November are ideal for trekking with clear skies and mild weather. In December temperatures fall, but the days are warm and the clear, azure winter skies serve a striking background to the snow-capped peaks. On a sunny day, temperatures reach about 16-18 ° C. The nights, however, are cold with temperatures falling below freezing.
Annual Average Temperatures of different places are as follows :
You will experience a range of variations in the Indian climatic conditions. India has three major seasons – summers, winters and monsoon. The lines below will tell you about Indian weather in detail:
Summer:
The summer season in India lasts from March to June. During summers, temperature can even go above average, causing unbearable heat. Another drawback of summers is the dust-laden air that can hamper views. Many Indians, themselves, head to "hill stations" to get a relief from the extreme heat of the lowlands.
Winters:
The winter season lasts from October to February. It is the best time to visit India. The weather is pleasant throughout the country with minimal rainfall in most places. It is the ideal time to enjoy the beauty of India.
Monsoon:
The monsoon season lasts from July to September. Rains sweep across the country with heavy downpours. The drawback of this season is a high possibility of flooding in some areas. This makes it difficult to travel around. Duration of monsoons may vary in different regions by several weeks.
Pakistan is divided into five distinct geographic regions: The Thar Desert and Lower Indus Valley in the south with arid valleys and rocky hills; The Baluchistan Plateau toward the west with elevation between 1,000 and 3,000 feet (300-900 meters) and covering nearly half the nation's territory; The Indus Basin, an irrigated agricultural area in the northeast; The Northwest Frontier, an area of barren mountains and irrigated valleys bordering Afghanistan; and The Far North with snowcapped mountains reaching high elevations.
Seasonal temperatures vary widely in these five regions. With the exception of the Far North, summers are hot throughout the country with temperatures ranging to 90-120°F (32-49°C) and little nighttime relief. Trade winds provide some relief during the hot and humid summers in Karachi and a brief cool season comes between December and February. In Lahore, Islamabad, and Peshawar a distinct winter season brings daytime temperatures of 60°F (16°C) or less, cold nights, and - in Islamabad and Peshawar - frequent morning frost does occur during the stark winter season. Altitude governs climate in the Far North, with pleasant summers in the lower regions and perpetual snow in the higher mountains.
The average annual rainfall varies from 6 inches (40 cm) in Karachi, 15 (38 cm) in Peshawar, 18 (46 cm) in Lahore, to about 30 (76 cm) in Islamabad. Most rain falls during the summer monsoon from July to September, although parts of the Northwest Frontier and the Indus Basin experience a moderate winter rainy season as well.
The climate of Bangladesh is subtropical and tropical with days still averaging 25°C (77°F) in January, 35°C (95°F) in April and lingering around the 30°C (86°F) mark for most of the year. Bangladesh has three main seasons: the monsoon or 'wet' season from late May to early October; the 'cold' season from mid-October to the end of February; and the 'hot' season (known in Bangladesh as the 'little rainy season') from mid-March to mid-May. There is also a 'cyclone season' - May to June and October to November.
Thailand can best be described as tropical and humid for the majority of the country during most of the year. The area of Thailand north of Bangkok has a climate determined by three seasons whilst the southern peninsular region of Thailand has only two.
In northern Thailand the seasons are clearly defined. Between November and May the weather is mostly dry, however this is broken up into the periods November to February and March to May. The later of these two periods has the higher relative temperatures as although the northeast monsoon does not directly effect the northern area of Thailand, it does cause cooling breezes from November to February.
The other northern season is from May to November and is dominated by the southwest monsoon, during which time rainfall in the north is at its heaviest.
The southern region of Thailand really has only two seasons -- the wet and the dry. These seasons do not run at the same time on both the east and west side of the peninsular. On the west coast the southwest monsoon brings rain and often heavy storms from April through to October, whilst on the east coast the most rain falls between September and December.
Overall the southern parts of Thailand get by far the most rain with around 2,400 millimetres every year, compared with the central and northern regions of Thailand, both of which get around 1,400 millimetres.
The weather in Cambodia
Cambodia’s climate is tropical, so there is plenty of rain during the south-west monsoon season. Rain is a possibility at any time from May to November, but the serious rain falls in September and October. The wind that brings the rain reverses during the winter to create a ‘dry’, or more accurately, a drier season from December to April – the only months that are nearly rain-free are January and February.
Temperature and humidity
There is little seasonal temperature variation, only about 6˚C, but both temperatures and rainfall decline the further inland you travel. Humidity varies quite a bit, averaging between 70% and 80%, but somewhat lower in the Ton Le Sap basin.
Rainfall
The amount of rainfall increases with altitude, reaching a peak around 5,000cm on the southeast mountains and the slopes of the Annamite mountain range in the south west. In lowland areas, rainfall averages around 1,500cm per annum. Between 70% and 80% of total rainfall is carried by the south-west monsoon.
Extreme weather
Tropical cyclones, better known as typhoons, are the only manifestation of severe weather conditions in Cambodia. However, they’re a rare occurrence, and seldom cause significant damage.
