September weather forecastBan Nampo, Laos
September
Weather in September
September in Ban Nampo witnesses a gradual abating of the monsoon. The end of the rainy season is on the horizon, and the rainfall starts reducing gradually. Throughout the month, bursts of sunshine intersperse the rainfall bringing much-needed relief from the constant wetness. Noted for having the lowest wind speed of the year at 2.9km/h (1.8mph), September is far from windy. This month brings a fascinating blend of rains coupled with warm, tropical sunshine which can prove to be an interesting experience for travelers.Temperature
The arrival of September is marked by an average high-temperature of a still warm 29.5°C (85.1°F), bearing a close resemblance to August. In Ban Nampo, in September, the average low-temperature is an enjoyable 19.4°C (66.9°F).Heat index
For September, the heat index is computed to be a torrid 37°C (98.6°F). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.Be informed that the heat index values are oriented around shady conditions and gentle breezes. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', evaluates the perceived heat by adding the effect of moisture in the air. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.
Humidity
In Ban Nampo, the average relative humidity in September is 84%.Rainfall
In Ban Nampo, in September, it is raining for 27.9 days, with typically 144mm (5.67") of accumulated precipitation. In Ban Nampo, during the entire year, the rain falls for 227.1 days and collects up to 1191mm (46.89") of precipitation.Daylight
The average length of the day in September is 12h and 15min.On the first day of the month, sunrise is at 05:55 and sunset at 18:24. On the last day of September, in Ban Nampo, sunrise is at 06:00 and sunset at 17:59 +07.
Sunshine
In Ban Nampo, the average sunshine in September is 7.9h.UV index
February through July, September through November, with an average maximum UV index of 6, are months with the highest UV index in Ban Nampo. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.Note: The maximum UV index, 6 during September, leads to the following recommendations:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Ban Nampo, Laos
- Average high temperature in September: 29.5°C
The warmest month (with the highest average high temperature) is April (33.4°C).
The month with the lowest average high temperature is December (26.1°C).
- Average low temperature in September: 19.4°C
The month with the highest average low temperature is June (20.7°C).
The coldest months (with the lowest average low temperature) are January and December (11.6°C).
Average pressure in September
Ban Nampo, Laos
- Average pressure in September: 1008.6mbar
The month with the highest atmospheric pressure is December (1015.2mbar).
The month with the lowest atmospheric pressure is July (1005.9mbar).
Average wind speed in September
Ban Nampo, Laos
- Average wind speed in September: 2.9km/h
The windiest month (with the highest average wind speed) is March (4.2km/h).
The calmest month (with the lowest average wind speed) is September (2.9km/h).
Average humidity in September
Ban Nampo, Laos
- Average humidity in September: 84%
The month with the highest relative humidity is August (89%).
The month with the lowest relative humidity is March (53%).
Average rainfall in September
Ban Nampo, Laos
- Average rainfall in September: 144mm
The wettest month (with the highest rainfall) is August (293mm).
The driest month (with the least rainfall) is February (7mm).
Average rainfall days in September
Ban Nampo, Laos
- Average rainfall days in September: 27.9 days
The month with the highest number of rainy days is August (30.4 days).
The month with the least rainy days is February (4.1 days).
Average daylight in September /
Average sunshine in September
Ban Nampo, Laos
- Average daylight in September: 12h and 12min
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: 7h and 54min
The month with the most sunshine is April (Average sunshine: 10h and 36min).
The month with the least sunshine is July (Average sunshine: 6h and 24min).
Average sunshine days in September
Ban Nampo, Laos
- Average sunshine days in September: 1.4 days
The month with the most sunshine days is January (23.4 days).
The month with the least sunshine days is August (0.2 days).
Average UV index in September
Ban Nampo, Laos
- Average UV index in September: 6
The months with the highest UV index are February, March, April, May, June, July, September, October and November (UV index 6).
The months with the lowest UV index are January, August and December (UV index 5).
Average cloud cover in September
Ban Nampo, Laos
- Average cloud cover in September: 54
The month with the most cloud cover is July (Cloud cover 68).
The month with the least cloud cover is February (Cloud cover 19).
Average visibility in September
Ban Nampo, Laos
- Average visibility in September: 7km
The months with the highest visibility are March and April (10km).
The month with the lowest visibility is July (6km).





