Do you need to know, when is the best time to go to Bhutan? Then you should take a look here, what weather you can expect there during the year.
The climate of Bhutan is very varied: It is tropical in southern plains, but you can expect cool winters and hot summers in central valleys and severe winters and cool summers in Himalayas.
When speaking about the usual weather in this state, the information is relevant for example for these popular places: Bajothang, Bumdeling Wildlife Sanctuary, Central Bhutan, Chhumey, Deothang, Eastern Bhutan, Gedu, Haa, Jakar, Jigme Dorji National Park, Jigme Khesar Strict Nature Reserve, Jigme Singye Wangchuck National Park, Jomotsangkha Wildlife Sanctuary, Khuruthang, Lhuentse, Mebisa, Mongar, Paro, Phobjikha, Phrumsengla National Park, Phuentsholing, Punakha, Royal Manas National Park, Sakteng Wildlife Sanctuary, Samdrup Jongkhar, Singye Dzong, Tang, Thimphu, Trashigang, Trongsa, Tsimasham, Ura, Wamrong, Western Bhutan.
Let's look now what weather you can expect in the area around the capital and in many other cities. The warmest month here is August, the average maximum temperature is 25.7 ℃ (78.26 ℉). The average minimum temperature in this month is 16.6 ℃ (61.88 ℉). The coldest month here is January, the average maximum temperature is 12.5 ℃ (54.5 ℉). The average minimum temperature in this month is 1.7 ℃ (35.06 ℉). The most rainy month here is July, the average number of rainy days is 21. The least rainy month here is January, the average number of rainy days is 2. 
When travelling to some places in Bhutan, always consider the altitude of the the place as well. The highest point here is Gangkar Puensum (7570 m) and the lowest point is Drangeme Chhu (97 m). So there are huge differences in altitudes in this country and the weather is very different in them therefore. Keep in mind, that the temperature usually decreases by 1.2 - 1.9 ℃ (2.2 - 3.5 ℉) per 200 m (656 ft), depending on the other conditions. (And we should add, that in the very special condition named thermal inversion even the temperature may be higher in higher altitudes.)
Typical (usual) weather in Bhutan in January is this: The average highest temperature in Bhutan in January is 12.5 ℃ (54.5 ℉). The average lowest temperature is 1.7 ℃ (35.06 ℉). At the beginning of January you can expect higher temperatures, the average highest temperature is around 12.8 ℃ (55.04 ℉). At the end of January you can expect higher temperatures, the average highest temperature is around 13.2 ℃ (55.76 ℉). The average number of rainy days in January is 2. The average rainfall is 12.3 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 10:26 (hours and minutes), in the middle of the month 10:35 and at the end of the month 10:52.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Bhutan in February is this: The average highest temperature in Bhutan in February is 13.9 ℃ (57.02 ℉). The average lowest temperature is 3.5 ℃ (38.3 ℉). At the beginning of February you can expect lower temperatures, the average highest temperature is around 13.2 ℃ (55.76 ℉). At the end of February you can expect higher temperatures, the average highest temperature is around 15.9 ℃ (60.62 ℉). The average number of rainy days in February is 7.1. The average rainfall is 11.8 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 10:52 (hours and minutes), in the middle of the month 11:12 and at the end of the month 11:36.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in Bhutan in March is this: The average highest temperature in Bhutan in March is 17.9 ℃ (64.22 ℉). The average lowest temperature is 6.4 ℃ (43.52 ℉). At the beginning of March you can expect lower temperatures, the average highest temperature is around 15.9 ℃ (60.62 ℉). At the end of March you can expect higher temperatures, the average highest temperature is around 18.8 ℃ (65.84 ℉). The average number of rainy days in March is 4. The average rainfall is 22.6 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:36 (hours and minutes), in the middle of the month 12:00 and at the end of the month 12:25.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Bhutan in April is this: The average highest temperature in Bhutan in April is 19.7 ℃ (67.46 ℉). The average lowest temperature is 9.6 ℃ (49.28 ℉). At the beginning of April you can expect lower temperatures, the average highest temperature is around 18.8 ℃ (65.84 ℉). At the end of April you can expect higher temperatures, the average highest temperature is around 21.4 ℃ (70.52 ℉). The average number of rainy days in April is 8.3. The average rainfall is 28.4 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:25 (hours and minutes), in the middle of the month 12:48 and at the end of the month 13:11.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.
Typical (usual) weather in Bhutan in May is this: The average highest temperature in Bhutan in May is 23.1 ℃ (73.58 ℉). The average lowest temperature is 12.9 ℃ (55.22 ℉). At the beginning of May you can expect lower temperatures, the average highest temperature is around 21.4 ℃ (70.52 ℉). At the end of May you can expect higher temperatures, the average highest temperature is around 23.9 ℃ (75.02 ℉). The average number of rainy days in May is 11.3. The average rainfall is 49.3 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 13:11 (hours and minutes), in the middle of the month 13:30 and at the end of the month 13:44.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Bhutan in June is this: The average highest temperature in Bhutan in June is 24.7 ℃ (76.46 ℉). The average lowest temperature is 14.9 ℃ (58.82 ℉). At the beginning of June you can expect lower temperatures, the average highest temperature is around 23.9 ℃ (75.02 ℉). At the end of June you can expect higher temperatures, the average highest temperature is around 24.9 ℃ (76.82 ℉). The average number of rainy days in June is 16.3. The average rainfall is 97.9 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 13:44 (hours and minutes), in the middle of the month 13:51 and at the end of the month 13:51.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Bhutan in July is this: The average highest temperature in Bhutan in July is 25.1 ℃ (77.18 ℉). The average lowest temperature is 16.8 ℃ (62.24 ℉). At the beginning of July you can expect lower temperatures, the average highest temperature is around 24.9 ℃ (76.82 ℉). At the end of July you can expect higher temperatures, the average highest temperature is around 25.4 ℃ (77.72 ℉). The average number of rainy days in July is 21. The average rainfall is 139.5 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 13:51 (hours and minutes), in the middle of the month 13:43 and at the end of the month 13:29.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Bhutan in August is this: The average highest temperature in Bhutan in August is 25.7 ℃ (78.26 ℉). The average lowest temperature is 16.6 ℃ (61.88 ℉). At the beginning of August you can expect lower temperatures, the average highest temperature is around 25.4 ℃ (77.72 ℉). At the end of August you can expect lower temperatures, the average highest temperature is around 24.8 ℃ (76.64 ℉). The average number of rainy days in August is 20.4. The average rainfall is 130.7 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 13:29 (hours and minutes), in the middle of the month 13:10 and at the end of the month 12:48.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Bhutan in September is this: The average highest temperature in Bhutan in September is 23.9 ℃ (75.02 ℉). The average lowest temperature is 14.7 ℃ (58.46 ℉). At the beginning of September you can expect higher temperatures, the average highest temperature is around 24.8 ℃ (76.64 ℉). At the end of September you can expect lower temperatures, the average highest temperature is around 21.9 ℃ (71.42 ℉). The average number of rainy days in September is 15.9. The average rainfall is 99 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:48 (hours and minutes), in the middle of the month 12:24 and at the end of the month 12:00.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Bhutan in October is this: The average highest temperature in Bhutan in October is 19.9 ℃ (67.82 ℉). The average lowest temperature is 11.3 ℃ (52.34 ℉). At the beginning of October you can expect higher temperatures, the average highest temperature is around 21.9 ℃ (71.42 ℉). At the end of October you can expect lower temperatures, the average highest temperature is around 17.9 ℃ (64.22 ℉). The average number of rainy days in October is 5.8. The average rainfall is 72.5 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 12:00 (hours and minutes), in the middle of the month 11:36 and at the end of the month 11:13.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Bhutan in November is this: The average highest temperature in Bhutan in November is 15.9 ℃ (60.62 ℉). The average lowest temperature is 6.3 ℃ (43.34 ℉). At the beginning of November you can expect higher temperatures, the average highest temperature is around 17.9 ℃ (64.22 ℉). At the end of November you can expect lower temperatures, the average highest temperature is around 14.5 ℃ (58.1 ℉). The average number of rainy days in November is 3. The average rainfall is 17.7 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 11:13 (hours and minutes), in the middle of the month 10:52 and at the end of the month 10:36.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.Typical (usual) weather in Bhutan in December is this: The average highest temperature in Bhutan in December is 13.1 ℃ (55.58 ℉). The average lowest temperature is 2.8 ℃ (37.04 ℉). At the beginning of December you can expect higher temperatures, the average highest temperature is around 14.5 ℃ (58.1 ℉). At the end of December you can expect lower temperatures, the average highest temperature is around 12.8 ℃ (55.04 ℉). The average number of rainy days in December is 2.5. The average rainfall is 7.9 mm (look here, what this number means). When planning your travel, please, keep in mind, that actual weather may differ from these average values. The length of the day at the beginning of this month is approximately 10:36 (hours and minutes), in the middle of the month 10:26 and at the end of the month 10:24.These numbers above are valid primarily for the capital and the area around it. It is important to say, that the weather may differ significantly in different altitudes, especially in mountains.| Paro | temperature: - | highest temperature: 13.1 ℃ (55.58 ℉) | lowest temperature: 2.8 ℃ (37.04 ℉) | rainfall: 7.9mm | rainy days: 2.5 |
| Wangdi Phodrang | temperature: - | highest temperature: 19.5 ℃ (67.1 ℉) | lowest temperature: 6.7 ℃ (44.06 ℉) | rainfall: 4.9mm | rainy days: 0.9 |
| Bumthang | temperature: - | highest temperature: 12.7 ℃ (54.86 ℉) | lowest temperature: -3.5 ℃ (25.7 ℉) | rainfall: 5.5mm | rainy days: 0.9 |
| Mongar | temperature: - | highest temperature: 18.1 ℃ (64.58 ℉) | lowest temperature: 8.2 ℃ (46.76 ℉) | rainfall: 2.9mm | rainy days: 0.6 |