Climate and monthly weather forecastAlla, Bhutan
Climate and monthly weather forecast
The climate of Alla
Covered by the temperate highland tropical climate with dry winters according to the Köppen climate classification, Alla resides in the highlands of Bhutan. Throughout the year the area is bestowed with substantial atmospheric pressure that remains nearly stable, hovering around 1016.7mb on average. Variations in temperature are not extreme, but still significant, with readings dropping as low as -2.6°C (27.3°F) in the chill of winter to the peak of 17.8°C (64°F) in the heat of summer.The characteristic humidity is on an increasing trend as months progress from the start of the year to the peak of monsoon in July, after which it exhibits a reducing pattern. An important characteristic of Alla's climate is the contrasting patterns of rainfall and snowfall. Whilst the area looks forward to 196mm (7.72") of rainfall in July, it is also presented with snowfall in winter, gaining intensity from November and peaking in February with 146mm (5.75").
Distinct phases of sunshine grace Alla, with the duration varying greatly from 7.4 hours per day in the colder winter months to as high as 13.9 hours in summer. A noteworthy aspect is the UV index, which moves subtly from 2 at the start and end of the year to a maximum of 4 during the middle months.
The best time to visit Alla
Taking into account all weather parameters, the prime season to explore Alla would be between April and June. During this time, the temperatures rise from 12°C (53.6°F) to 16.7°C (62.1°F), and the daylight hours stretch up to approximately 14 hours per day, providing ample time and pleasant conditions for outdoor exploration. The rainfall is neither at its lowest nor highest, allowing for a moist and fresh environment whilst not causing disruption to travel plans.The worst time to visit Alla
Rainfall is at its peak from July to August, resulting in 196mm (7.72") to 168mm (6.61") of precipitation respectively. This period also witnesses the highest humidity levels of 83% to 80%, leading to a damp and heavy atmosphere that might not be ideal for travel. Temperatures, while hovering around the year's maximum, are usually overshadowed by the heavy showers, potentially causing disruptions to travel and local sightseeing.Spring weather in Alla
Spring in Alla, marked by mild temperatures, offers a unique experience. The period from March to May sees temperatures rise from 9.6°C (49.3°F) to 14.3°C (57.7°F), providing a much-needed respite from the chill of winter. Rainfall is steadily increasing and reaches 95mm (3.74") in May. The daylight hours grow longer, reaching up to 13.5 hours per day in May.Summer weather in Alla
During the summer season, from June to August, Alla experiences its highest temperatures, ranging from 16.7°C (62.1°F) to 17.8°C (64°F). This period also welcomes abundant rainfall, peaking in July with 196mm (7.72"), leading to lush and green surroundings. Despite the rains, the town basks in around 13.7 to 13.1 hours of daylight daily, making summer a vibrant and dynamic season.Autumn weather in Alla
Autumn, spanning from September to November, is marked by a steady drop in temperature from 16.2°C (61.2°F) to 10.2°C (50.4°F). This period sees a dramatic decrease in rainfall, totaling 119mm (4.69") in September and gradually falling to 10mm (0.39") in November. Daylight hours reduce gradually, ranging from 12.3 hours in September to 10.8 hours in November.Winter weather in Alla
Winter commences in December and lasts till February, with temperatures falling to as low as -2.6°C (27.3°F) in January. Alla experiences minimal rainfall during these months and instead sees the arrival of snowfall, particularly in January and February, culminating in an accumulation of 146mm (5.75") of snow in February. The daylight hours shrink to roughly 10.4 to 10.6 hours per day, with corresponding sunshine hours being the lowest of the year.Weather in January
January tends to be brisk in Alla, Bhutan, with an average precipitation of 11mm (0.43") falling over just more than four days and significant snowfall of 87mm (3.43") materializing in a span of 6.6 days. The month, signifying winter, is comparatively colder than its succeeding month, February. Weather in January »Weather in February
February exhibits a different weather pattern as temperatures start to rise, signaling the transitioning phase towards spring. However, this month differentiates itself with staggering 146mm (5.75") of snowfall, the maximum recorded throughout the year. Weather in February »Weather in March
Come March, and spring starts to take hold in Alla, Bhutan. With an average high of 9.6°C (49.3°F), the temperature rise becomes more discernible. Gradually, the snowfall decreases to 121mm (4.76"), ceasing the heavy snowfall regime witnessed in the previous two months. Weather in March »Weather in April
April marks a significant transition from the cold winter weather to the warmth of spring. The average high temperature increases to 12°C (53.6°F), which is a change from the usual cold weather. The month is a wetter spell with rainfall increasing to 62mm (2.44"), which is significantly higher than previous months, while snowfall dips dramatically to 23mm (0.91"). Weather in April »Weather in May
In May, summer comes to Alla, Bhutan and with it comes an increase in temperature and humidity levels. The conspicuous rise in temperature to an average high of 14.3°C (57.7°F) and the significant amount of rainfall, coming in at 95mm (3.74"), separate this month distinctly from its predecessors. Weather in May »Weather in June
June experiences a heightened warmth in Alla, Bhutan, thus carrying forward the summer season. The summer solstice in June results in the year’s longest days at 13.9 daylight hours but brings about the maximum humidity of 78%. Rainfall attains a definite peak in this month, clocking at 113mm (4.45"), while snowfall is completely absent. Weather in June »Weather in July
July signifies the height of the summer season in Alla with the average high temperature rising slightly to 16.9°C (62.4°F). However, this month gets distinguished due to its highest rainfall of 196mm (7.72") over an average of 27.3 days throughout the year. Weather in July »Weather in August
August maintains the sweltering trend of summer, recording the highest average temperature of 17.8°C (64°F). Interestingly, rainfall experiences a slight reduction from July levels, coming down to 168mm (6.61"), but remains considerably high. Weather in August »Weather in September
September signals the onset of autumn in Alla, Bhutan. The most notable weather change is the drop in average temperature to 16.2°C (61.2°F), thus indicating a shift from summer to cooler months. The rainfall dips to 119mm (4.69"), indicating a decrease in precipitation, while the humidity levels remain high. Weather in September »Weather in October
October witnesses a substantial transformation in Alla's weather, transitioning from autumn to the onset of winter. The temperature considerably drops to an average high of 13°C (55.4°F), signifying the end of warm days. Correspondingly, the rainfall also grounds, dropping to 39mm (1.54") spread across 12.7 days, merely a third of September’s rainfall. Weather in October »Weather in November
November indicates the arrival of winter in Alla, Bhutan, with a substantial drop in the average high temperature to 10.2°C (50.4°F). This winter month is noted for having the least rainfall, only 10mm (0.39") falling over seven days. Weather in November »Weather in December
December signifies entrenched winter in the beautiful terrain of Alla, Bhutan. The temperature dips further to an average high of 7.6°C (45.7°F), making it one of the coldest months of the year. Moreover, snowfall peaks towards the end of the year, reaching 40mm (1.57") over 5.4 days. Weather in December »Updated: Feb 3, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January brings the lowest temperatures in Alla, with an average high of 5.8°C (42.4°F) and an average low of -2.6°C (27.3°F).
The months with the lowest humidity in Alla, Bhutan, are January and February, with an average relative humidity of 57%.
Throughout the year, in Alla, there are 187.5 rainfall days, and 879mm (34.61") of precipitation is accumulated.
Months with snowfall in Alla are January through May, November and December.
Throughout the year, in Alla, Bhutan, there are 33.8 snowfall days, and 431mm (16.97") of snow is accumulated.
January, February and November, with an average of 7.4h of sunshine, are months with the least sunshine.
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Alla, Bhutan.
The month with the most snowfall is February, when snow falls for 7.8 days and typically aggregates up to 146mm (5.75") of snow.
April has the most sunshine of the year in Alla, Bhutan, with an average of 11.2h of sunshine.
The months with the highest UV index are May through September, with an average maximum UV index of 4.
In Alla, snow does not fall in June through October.
The month with the longest days is June, with an average of 13h and 48min of daylight.
The most humid month in Alla, Bhutan, is July, with an average relative humidity of 83%.
July is the month with the most rainfall. Rain falls for 27.3 days and accumulates 196mm (7.72") of precipitation.
August is Alla's warmest month, registering average high temperatures of 17.8°C (64°F) and lows of 11.9°C (53.4°F).
The month with the least rainfall in Alla, Bhutan, is December, when the rain falls for 4.5 days and typically collects 7mm (0.28") of precipitation.
December has the shortest days of the year in Alla, Bhutan, with an average of 10h and 30min of daylight.
Alla does not utilize Daylight Saving Time (DST). +06 timezone is used over the entire year.
Average temperature
Alla, Bhutan
The warmest month (with the highest average high temperature) is August (17.8°C).
The month with the lowest average high temperature is January (5.8°C).
The month with the highest average low temperature is August (11.9°C).
The coldest month (with the lowest average low temperature) is January (-2.6°C).
Average pressure
Alla, Bhutan
- Average pressure in January:
1016.9mbar - Average pressure in February:
1016mbar - Average pressure in March:
1014.9mbar - Average pressure in April:
1013.3mbar - Average pressure in May:
1010.8mbar - Average pressure in June:
1007.2mbar
- Average pressure in July:
1006.8mbar - Average pressure in August:
1008.5mbar - Average pressure in September:
1011.5mbar - Average pressure in October:
1015.7mbar - Average pressure in November:
1016.7mbar - Average pressure in December:
1016.7mbar
The month with the highest atmospheric pressure is January (1016.9mbar).
The month with the lowest atmospheric pressure is July (1006.8mbar).
Average wind speed
Alla, Bhutan
- Average wind speed in January:
7.5km/h - Average wind speed in February:
8km/h - Average wind speed in March:
8.4km/h - Average wind speed in April:
8.6km/h - Average wind speed in May:
8.1km/h - Average wind speed in June:
7.7km/h
- Average wind speed in July:
7.2km/h - Average wind speed in August:
7km/h - Average wind speed in September:
6.4km/h - Average wind speed in October:
6.4km/h - Average wind speed in November:
7.1km/h - Average wind speed in December:
6.8km/h
The windiest month (with the highest average wind speed) is April (8.6km/h).
The calmest months (with the lowest average wind speed) are September and October (6.4km/h).
Average humidity
Alla, Bhutan
The month with the highest relative humidity is July (83%).
The months with the lowest relative humidity are January and February (57%).
Average rainfall
Alla, Bhutan
The wettest month (with the highest rainfall) is July (196mm).
The driest month (with the least rainfall) is December (7mm).
Average rainfall days
Alla, Bhutan
- Average rainfall days in January:
4.2 days - Average rainfall days in February:
4.9 days - Average rainfall days in March:
12.9 days - Average rainfall days in April:
19.1 days - Average rainfall days in May:
22.8 days - Average rainfall days in June:
24.9 days
- Average rainfall days in July:
27.3 days - Average rainfall days in August:
25.8 days - Average rainfall days in September:
21.3 days - Average rainfall days in October:
12.7 days - Average rainfall days in November:
7.1 days - Average rainfall days in December:
4.5 days
The month with the highest number of rainy days is July (27.3 days).
The month with the least rainy days is January (4.2 days).
Average snowfall
Alla, Bhutan
The month with the highest snowfall is February (146mm).
The months with the least snowfall are June, July, August, September and October (0mm).
Average snowfall days
Alla, Bhutan
- Average snowfall days in January:
6.6 days - Average snowfall days in February:
7.8 days - Average snowfall days in March:
8.2 days - Average snowfall days in April:
2.3 days - Average snowfall days in May:
0.2 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
3.3 days - Average snowfall days in December:
5.4 days
The month with the highest number of snowfall days is March (8.2 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight / Average sunshine
Alla, Bhutan
- Average daylight in January:
10h and 36min - Average daylight in February:
11h and 12min - Average daylight in March:
12h and 0min - Average daylight in April:
12h and 48min - Average daylight in May:
13h and 30min - Average daylight in June:
13h and 48min
- Average daylight in July:
13h and 42min - Average daylight in August:
13h and 6min - Average daylight in September:
12h and 18min - Average daylight in October:
11h and 30min - Average daylight in November:
10h and 48min - Average daylight in December:
10h and 30min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in January:
7h and 24min - Average sunshine in February:
7h and 24min - Average sunshine in March:
9h and 36min - Average sunshine in April:
11h and 12min - Average sunshine in May:
11h and 0min - Average sunshine in June:
10h and 18min
- Average sunshine in July:
9h and 0min - Average sunshine in August:
10h and 12min - Average sunshine in September:
9h and 36min - Average sunshine in October:
8h and 0min - Average sunshine in November:
7h and 24min - Average sunshine in December:
7h and 30min
The month with the most sunshine is April (Average sunshine: 11h and 12min).
The months with the least sunshine are January, February and November (Average sunshine: 7h and 24min).
Average sunshine days
Alla, Bhutan
- Average sunshine days in January:
22.9 days - Average sunshine days in February:
18 days - Average sunshine days in March:
10.3 days - Average sunshine days in April:
5.7 days - Average sunshine days in May:
2.8 days - Average sunshine days in June:
2.8 days
- Average sunshine days in July:
2.9 days - Average sunshine days in August:
3.3 days - Average sunshine days in September:
6.1 days - Average sunshine days in October:
13.5 days - Average sunshine days in November:
17.9 days - Average sunshine days in December:
22.3 days
The month with the most sunshine days is January (22.9 days).
The months with the least sunshine days are May and June (2.8 days).
Average UV index
Alla, Bhutan
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover
Alla, Bhutan
The month with the most cloud cover is July (Cloud cover 51).
The month with the least cloud cover is January (Cloud cover 14).
Average visibility
Alla, Bhutan
The months with the highest visibility are January, February, March, April, May, October, November and December (10km).
The months with the lowest visibility are June, July, August and September (9km).
