September weather forecast
Savannakhet, Laos

September

Weather in September

September in Savannakhet is characterized by receding monsoon rains and slightly decreased temperatures. A drop in rainfall occurs, making the environment less humid and more comfortable. Despite the decrease in precipitation, there remains the same amount of daylight hours. The UV index remains at 12 throughout September. Monthly rainfall reduces to 219mm (8.62") over seventeen days, while temperatures range from 23.5°C (74.3°F) to 31.1°C (88°F), making conditions more pleasantly mild.

Temperature

Savannakhet observes a minor difference in average high-temperatures between August's 30.6°C (87.1°F) and September's 31.1°C (88°F). In September, the nighttime temperature lowers to an average of 23.5°C (74.3°F).

Rainfall

In Savannakhet, in September, it is raining for 17 days, with typically 219mm (8.62") of accumulated precipitation. In Savannakhet, Laos, during the entire year, the rain falls for 122 days and collects up to 1452mm (57.17") of precipitation.

Daylight

In September, the average length of the day is 12h and 14min.
On the first day of the month, sunrise is at 05:47 and sunset at 18:14. On the last day of September, sunrise is at 05:50 and sunset at 17:50 +07.

Sunshine

In Savannakhet, the average sunshine in September is 6h.

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index. A UV Index estimate of 11, and higher, represents an extreme threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: In September, the maximum UV index of 12 suggests these recommendations:
Put into effect every essential safeguard, as unprotected skin and eyes might burn instantly. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. A broad-spectrum sunscreen of SPF 30+ should be used liberally and reapplied every two hours or post an outdoor workout or swim.

Frequently asked questions

How hot is it in September?
Savannakhet in September has an average high-temperature of 31.1°C (88°F) and an average low-temperature of 23.5°C (74.3°F).
How many days does it rain in September?
In Savannakhet, in September, it is raining for 17 days, with typically 219mm (8.62") of accumulated precipitation.
How many hours of daylight does Savannakhet have in September?
The average day length in September is 12h and 14min.
When are sunrise and sunset in September?
On the first day of September, sunrise is at 05:47 and sunset at 18:14. On the last day of the month, sunrise is at 05:50 and sunset at 17:50 +07.
How long on average sun shines in September?
The average sunshine duration in September is 6h.
When is the highest UV index?
The months with the highest UV index are March through September, with an average maximum UV index of 12.
How high is the UV index in September?
In September, the average daily maximum UV index is 12. A UV Index estimate of 11, and higher, represents an excessive health risk from unprotected exposure to UV radiation.
Average high temperature
Average low temperature
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average UV index
Average temperature in September
Savannakhet, Laos
  • Average high temperature in September: 31.1°C

The warmest month (with the highest average high temperature) is April (35°C).
The month with the lowest average high temperature is December (27.7°C).

  • Average low temperature in September: 23.5°C

The month with the highest average low temperature is June (24.8°C).
The coldest month (with the lowest average low temperature) is December (14.7°C).

Average rainfall in September
Savannakhet, Laos
  • Average rainfall in September: 219mm

The wettest month (with the highest rainfall) is August (343.4mm).
The driest month (with the least rainfall) is December (2.4mm).

Average rainfall days in September
Savannakhet, Laos
  • Average rainfall days in September: 17 days

The month with the highest number of rainy days is August (23 days).
The months with the least rainy days are January and December (1 days).

Average daylight in September /
Average sunshine in September
Savannakhet, Laos
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 13h and 6min).
The month with the shortest days is December (Average daylight: 11h and 12min).

  • Average sunshine in September: 6h

The months with the most sunshine are January, February and December (Average sunshine: 9h).
The months with the least sunshine are June and August (Average sunshine: 5h).

Average UV index in September
Savannakhet, 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 month with the lowest UV index is December (UV index 8).

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