September weather forecast
Cẩm Phả, Vietnam

September services as a bridge between the hot, rainy season and the gradually cooling climate in Cẩm Phả, Vietnam. The major climate shift is the drop in rainfall from 270mm (10.63") in August to 137mm (5.39") in September. Reduced precipitation and temperature fluctuation offer a respite from the preceding months' intense heat and humidity. The slow transition from summer to fall ensures comfortable weather and gives tourists a chance to enjoy less crowded attractions. Despite the declining rainfall, it's a wonderful month for the exploration of Cẩm Phả's natural beauty.

Temperature

September's average high-temperature is a warm 29.8°C (85.6°F), maintaining a close comparison with August's 30.2°C (86.4°F). During the month of September, Cẩm Phả's average nighttime temperature closely mirrors its daytime counterpart, at 26.1°C (79°F).

Heat index

The average heat index in September is calculated to be a sweltering 36°C (96.8°F). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.
Heat index readings emphasize conditions of light breezes and shaded spots. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.

Humidity

The average relative humidity in September is 77%.

Rainfall

In Cẩm Phả, in September, during 18.3 rainfall days, 137mm (5.39") of precipitation is typically accumulated. Throughout the year, there are 209.3 rainfall days, and 1269mm (49.96") of precipitation is accumulated.

Sea temperature

In Cẩm Phả, the average seawater temperature in September is 28.9°C (84°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is perceived as agreeably warm, making all water activities enjoyable without the risk of discomfort over lengthy durations.

Daylight

In Cẩm Phả, Vietnam, the average length of the day in September is 12h and 16min.
On the first day of the month, sunrise is at 05:34 and sunset at 18:06. On the last day of September, in Cẩm Phả, sunrise is at 05:41 and sunset at 17:39 +07.

Sunshine

The average sunshine in September in Cẩm Phả, Vietnam, is 9.1h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the UV index of 7 transforms into the following advice:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Caution! The Sun's UV rays become stronger due to reflections from water and sand.