September weather forecastBan Khong, Laos
September
Weather in September
The arrival of September signifies the gradual retreat of the wet season as Ban Khong's weather begins to transition yet again. As rainfall reduces, an upturn in the sunshine hours is perceived, enriching the city with increased sunlight. However, humidity levels and cloud cover remain significant, reminding visitors and residents alike of the recent departure of the monsoon season. The notable change in weather is reflected through the significant decrease in rainfall to 109mm (4.29"). September hence breaks away from the monsoon mold, paving the way for the subsequent dry season.Temperature
September begins with an average high-temperature of a still warm 27.4°C (81.3°F), reflecting close similarity to the preceding month. In September, Ban Khong experiences an average nighttime temperature of 16.8°C (62.2°F).Heat index
During September, the heat index is computed to be a hot 31°C (87.8°F). Fatigue might occur with continuous exposure and activity, potentially causing heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', offers an insight into how hot it feels when we factor in moisture content. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Humidity
In September, the average relative humidity is 85%.Rainfall
In Ban Khong, in September, it is raining for 24.6 days, with typically 109mm (4.29") of accumulated precipitation. In Ban Khong, during the entire year, the rain falls for 214.1 days and collects up to 1099mm (43.27") of precipitation.Daylight
In September, the average length of the day is 12h and 16min.On the first day of September, sunrise is at 05:49 and sunset at 18:20. On the last day of the month, sunrise is at 05:55 and sunset at 17:54 +07.
Sunshine
The average sunshine in September is 8.1h.UV index
February through April, June and September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 6 during September leads to these advisories:
Resist overexposure. Safeguarding from solar damage is indispensable. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Ban Khong, Laos
- Average high temperature in September: 27.4°C
The warmest month (with the highest average high temperature) is April (30.5°C).
The months with the lowest average high temperature are January and December (22.7°C).
- Average low temperature in September: 16.8°C
The month with the highest average low temperature is June (18.5°C).
The coldest months (with the lowest average low temperature) are January and December (9.3°C).
Average pressure in September
Ban Khong, Laos
- Average pressure in September: 1009.5mbar
The month with the highest atmospheric pressure is December (1017.3mbar).
The month with the lowest atmospheric pressure is July (1005.8mbar).
Average wind speed in September
Ban Khong, Laos
- Average wind speed in September: 3.8km/h
The windiest month (with the highest average wind speed) is March (5.6km/h).
The calmest month (with the lowest average wind speed) is August (3.5km/h).
Average humidity in September
Ban Khong, Laos
- Average humidity in September: 85%
The months with the highest relative humidity are July and August (89%).
The month with the lowest relative humidity is March (58%).
Average rainfall in September
Ban Khong, Laos
- Average rainfall in September: 109mm
The wettest month (with the highest rainfall) is August (269mm).
The driest month (with the least rainfall) is February (8mm).
Average rainfall days in September
Ban Khong, Laos
- Average rainfall days in September: 24.6 days
The month with the highest number of rainy days is August (30.3 days).
The month with the least rainy days is February (4.3 days).
Average daylight in September /
Average sunshine in September
Ban Khong, Laos
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 13h and 18min).
The month with the shortest days is December (Average daylight: 10h and 54min).
- Average sunshine in September: 8h and 6min
The month with the most sunshine is April (Average sunshine: 11h and 0min).
The month with the least sunshine is July (Average sunshine: 6h and 18min).
Average sunshine days in September
Ban Khong, Laos
- Average sunshine days in September: 3.5 days
The month with the most sunshine days is February (22.6 days).
The month with the least sunshine days is August (0.3 days).
Average UV index in September
Ban Khong, Laos
- Average UV index in September: 6
The months with the highest UV index are February, March, April, June and September (UV index 6).
The month with the lowest UV index is December (UV index 4).
Average cloud cover in September
Ban Khong, Laos
- Average cloud cover in September: 62
The month with the most cloud cover is July (Cloud cover 72).
The month with the least cloud cover is March (Cloud cover 24).
Average visibility in September
Ban Khong, Laos
- Average visibility in September: 6km
The months with the highest visibility are March and April (9km).
The months with the lowest visibility are January, July, August, September, October, November and December (6km).
