September weather forecast
Luang Prabang, Laos

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Weather in September

September marks the receding phase of the monsoon season in Luang Prabang. Rainfall volume shrinks to 173mm (6.81"), easing-off the city from the heavy wet conditions prevalent during the preceding months. The humidity level drops slightly but the city continues to be enveloped in a moisture-laden ambiance. A slight rise in temperature and extended sunshine hours hint at late summer-like conditions. Nature lovers can relish the verdant landscape adorned with a refreshed look after the intense rain of the previous months.

Temperature

Upon the onset of September, Luang Prabang witnesses an average high-temperature of a still hot 31.9°C (89.4°F), showing a close resemblance to the prior month. During September, the nighttime temperature in Luang Prabang averages of 22.9°C (73.2°F).

Heat index

In September, the average heat index is computed to be a blazing hot 47°C (116.6°F). Note: Heat exhaustion and heat cramps are probable. Heatstroke can follow with prolonged activity.
Records show heat index calculations are tailored for shaded regions and mild winds. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is found by incorporating humidity levels into the air temperature measurement. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

In Luang Prabang, the average relative humidity in September is 87%.

Rainfall

In Luang Prabang, during September, the rain falls for 12 days and regularly aggregates up to 173mm (6.81") of precipitation. In Luang Prabang, Laos, during the entire year, the rain falls for 99 days and collects up to 1443mm (56.81") of precipitation.

Daylight

In Luang Prabang, the average length of the day in September is 12h and 16min.
On the first day of the month, sunrise is at 05:55 and sunset at 18:26. On the last day of September, in Luang Prabang, sunrise is at 06:02 and sunset at 18:00 +07.

Sunshine

In Luang Prabang, the average sunshine in September is 6h.

UV index

The months with the highest UV index in Luang Prabang are March through September, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an ultimate health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 12 in September interprets into the following recommendations:
Adopt all important safety measures, unprotected skin may burn rapidly. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Regardless of cloud cover, it's recommended to apply generously and reapply often a sunscreen with an SPF of at least 30, especially after swimming or any outdoor activity.
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Frequently asked questions

How hot is it in Luang Prabang in September?

The average high-temperature and low-temperature in Luang Prabang during September are 31.9°C (89.4°F) and 22.9°C (73.2°F) respectively. In September, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is computed to be 47°C (116.6°F).

What is the average humidity in September in Luang Prabang?

The average relative humidity in September in Luang Prabang, Laos, is 87%.

How many days does it rain in September in Luang Prabang?

In Luang Prabang, during September, the rain falls for 12 days and regularly aggregates up to 173mm (6.81") of precipitation.

What is the average length of the day in September in Luang Prabang?

In September, the average day length in Luang Prabang, Laos, is 12h and 16min.

When are sunrise and sunset in September in Luang Prabang?

On the first day of September in Luang Prabang, sunrise is at 05:55 and sunset at 18:26. On the last day of the month, sunrise is at 06:02 and sunset at 18:00 +07.

How many hours of sunshine does Luang Prabang have in September?

The average sunshine duration in September is 6h.

What is the month with the highest UV index in Luang Prabang?

The months with the highest UV index are March through September, with an average maximum UV index of 12.

What is the UV index intensity in September in Luang Prabang?

The average daily maximum UV index in September in Luang Prabang, Laos, is 12. A UV Index estimate of 11, and higher, represents an extreme health vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in September
Luang Prabang, Laos

Average temperature in September - Luang Prabang, Laos
  • Average high temperature in September: 31.9°C

The warmest month (with the highest average high temperature) is April (34.4°C).
The month with the lowest average high temperature is December (26.3°C).

  • Average low temperature in September: 22.9°C

The month with the highest average low temperature is June (24.5°C).
The coldest month (with the lowest average low temperature) is January (14.2°C).

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Average humidity in September
Luang Prabang, Laos

Average humidity in September - Luang Prabang, Laos
  • Average humidity in September: 87%

The month with the highest relative humidity is August (89%).
The month with the lowest relative humidity is March (74%).

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Average rainfall in September
Luang Prabang, Laos

Average rainfall in September - Luang Prabang, Laos
  • Average rainfall in September: 172.6mm

The wettest month (with the highest rainfall) is August (288.6mm).
The driest month (with the least rainfall) is December (10.1mm).

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Average rainfall days in September
Luang Prabang, Laos

Average rainfall days in September - Luang Prabang, Laos
  • Average rainfall days in September: 12 days

The month with the highest number of rainy days is August (19 days).
The month with the least rainy days is December (1 days).

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Average daylight in September /
Average sunshine in September
Luang Prabang, Laos

Average daylight in September / Average sunshine in September - Luang Prabang, Laos
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 13h and 18min).
The month with the shortest days is December (Average daylight: 11h and 0min).

  • Average sunshine in September: 6h and 0min

The month with the most sunshine is February (Average sunshine: 7h and 18min).
The month with the least sunshine is July (Average sunshine: 4h and 6min).

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Average UV index in September
Luang Prabang, Laos

Average UV index in September - Luang Prabang, Laos
  • Average UV index in September: 12

The months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The months with the lowest UV index are January and December (UV index 8).

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Luang Prabang, Laos

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