Climate - Bhutan

In Bhutan, a small Asian country crossed by the Himalayas, the climate is influenced by altitude: it is subtropical in the lowlands, and becomes progressively colder as you climb the mountains slopes. In addition, the climate is influenced by the summer monsoon, which brings rains and widespread cloudiness for almost six months per year, but especially from June to late September.



In the thin flat southern region, in cities like Gelephu and Phuentsholing, the climate is subtropical. Winter is very mild, but sometimes it can get cold at night. Spring, from March to May, is hot, especially in April and May, when the temperature can reach as high as 40 °C (104 °F); in addition, afternoon thunderstorms become more frequent. From June to mid-October, it's the monsoon season, with abundant rainfall, at times torrential, which are enhanced by the proximity to the mountains, and muggy heat.
Total annual rainfall can exceed 3,000 millimeters (118 inches). The best time in this area is from November to February.
Here are the average temperatures of Gelephu.

In hilly and mountainous areas up to 1,500 meters (5,000 feet), the climate becomes progressively milder, with relatively cold, dry winters and warm, rainy summers, with monsoon rains on the southern side, while in inland valleys, the summer rains are less intense.
For example, in Punakha, located at 1,300 meters (4,250 feet), the average temperature ranges from 11 °C (52 °F) in January to 24 °C (75 °F) in July, so the summer is quite hot and humid despite the altitude. Here are the average temperatures.

Above 2,000 meters (6,500 feet), winter are quite cold, with nights usually below freezing (0 °C or 32 °F).

Thimphu

In the capital, Thimphu, located in a valley, at an altitude varying between 2,200 and 2,600 meters (7,200 and 8,500 ft), the average temperature ranges from 6 °C (43 °F) in January to 21/22 °C (70/72 °F) in the period from June to August. Winter is dry and sunny, but snow can sometimes fall.
Here are the average temperatures in Thimphu.

In Thimphu, the rains are not abundant, although they reach or exceed 75 mm (2.9 in) per month from June to September.

The sun in Bhutan shines regularly in winter, while it does not shine very often in the monsoon season. Here are the average daily sunshine hours in Thimphu.

In the nearby city of Paro, a similar climate is found.

Above 2,800 meters (9,200 ft), the daily average temperature in January drops around freezing, and even summer nights become cold.
Glaciers and perennial snows begin at high altitudes, above 5,000 meters (16,400 ft). In the northernmost areas, the summer rains are not very heavy, but the sky in summer is often cloudy, and you can find fogs, or rather clouds lying on the mountain slopes.
The highest peak of Bhutan is Gangkhar Puensum, 7,570 meters (28,836 feet) high.

Tropical cyclones

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Bhutan is too far from the sea to be directly hit by tropical cyclones, but the remains of cyclones affecting Bangladesh can cause heavy rains in the plains as well as snowfalls in the mountains, as happened in May 2009 with Cyclone Aila.
Cyclones typically occur from mid-April to early December, and most likely in May-June and in October-November.

When to go and what to pack in Bhutan