September weather forecastCát Hải, Vietnam

Weather in September

September marks the end of the monsoon in Cát Hải, Vietnam with a significant drop of rainfall to 205mm (8.07"). While the temperature doesn’t have a drastic drop, a minor decrease mirrors the close of summer. The reduction in rainfall also indicates the beginning of the transition towards drier months. The daylight hours see a decline, harmonious with the change in season. Wind conditions mildly intensify, signaling the change of season and a shift in overall climate conditions.

Temperature

September brings an average high-temperature of a warm 29.8°C (85.6°F), showing a slight difference from August's 30.3°C (86.5°F). Cát Hải reports an average low-temperature of 26.5°C (79.7°F) during the subtly cooler September nights.

Heat index

September's mean heat index is evaluated at a very hot 36°C (96.8°F). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', melds the effects of warmth and moisture to generate a feeling of heat. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance 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.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

The average relative humidity in September is 77%.

Rainfall

In September, the rain falls for 22.2 days. Throughout September, 205mm (8.07") of precipitation is accumulated. In Cát Hải, during the entire year, the rain falls for 232.3 days and collects up to 1483mm (58.39") of precipitation.

Daylight

The average length of the day in September in Cát Hải is 12h and 16min.
On the first day of the month, sunrise is at 05:36 and sunset at 18:08. On the last day of September, sunrise is at 05:43 and sunset at 17:41 +07.

Sunshine

In Cát Hải, the average sunshine in September is 9h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 7 suggests these recommendations:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. During bright days, sunglasses that offer UVA and UVB defense are recommended.