September weather forecast
Dieu Viên, Vietnam

September

Weather in September

September, the first month of the autumn in Dieu Viên, is still a tropical month, with an average temperature varying between 30.2°C (86.4°F) and 25°C (77°F).

Temperature

The transition into September shows a subtle variation to a still tropical 30.2°C (86.4°F) from August's 31.4°C (88.5°F) in the average high-temperature. In the month of September, Dieu Viên witnesses a consistent average low-temperature of 25°C (77°F).

Heat index

The heat index for September is appraised at a sweltering 38°C (100.4°F). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. An increase in relative humidity retards evaporation, subsequently reducing the body's heat removal rate and leading to a sensation of being overly warm. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

In September, the average relative humidity is 80%.

Rainfall

In September, the rain falls for 24.8 days. Throughout September, 134mm (5.28") of precipitation is accumulated. In Dieu Viên, during the entire year, the rain falls for 260 days and collects up to 1343mm (52.87") of precipitation.

Daylight

In Dieu Viên, the average length of the day in September is 12h and 13min.
On the first day of the month, sunrise is at 05:32 and sunset at 17:54. On the last day of September, sunrise is at 05:32 and sunset at 17:34 +07.

Sunshine

In September, the average sunshine is 8.6h.

UV index

The months with the highest UV index in Dieu Viên are March through September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A daily high UV index of 7 in September leads to these guidelines:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.

Frequently asked questions

How hot does it get in September?
During September, Dieu Viên experiences an average high-temperature of 30.2°C (86.4°F) and a low-temperature of 25°C (77°F). In September, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is appraised at 38°C (100.4°F).
What is the average humidity in September in Dieu Viên?
In September, the average relative humidity is 80%.
How many days does it rain in September?
In Dieu Viên, in September, it is raining for 24.8 days, with typically 134mm (5.28") of accumulated precipitation.
What is the average length of the day in September?
In Dieu Viên, the average day length in September is 12h and 13min.
What time are sunrise and sunset in September?
On the first day of September, sunrise is at 05:32 and sunset at 17:54. On the last day of the month, sunrise is at 05:32 and sunset at 17:34 +07.
How long on average sun shines in September?
The average sunshine duration in September is 8.6h.
When is the highest UV index?
The months with the highest UV index are March through September, with an average maximum UV index of 7.
What is the UV index intensity in September?
In September, the average daily maximum UV index is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in September
Dieu Viên, Vietnam
  • Average high temperature in September: 30.2°C

The warmest month (with the highest average high temperature) is May (31.8°C).
The month with the lowest average high temperature is January (24.5°C).

  • Average low temperature in September: 25°C

The month with the highest average low temperature is June (26°C).
The coldest month (with the lowest average low temperature) is February (21.3°C).

Average pressure in September
Dieu Viên, Vietnam
  • Average pressure in September: 1008.1mbar

The month with the highest atmospheric pressure is January (1014.7mbar).
The month with the lowest atmospheric pressure is July (1006.6mbar).

Average wind speed in September
Dieu Viên, Vietnam
  • Average wind speed in September: 10.6km/h

The windiest month (with the highest average wind speed) is December (18.7km/h).
The calmest month (with the lowest average wind speed) is May (10.3km/h).

Average humidity in September
Dieu Viên, Vietnam
  • Average humidity in September: 80%

The month with the highest relative humidity is December (87%).
The months with the lowest relative humidity are June, July and August (76%).

Average rainfall in September
Dieu Viên, Vietnam
  • Average rainfall in September: 134mm

The wettest month (with the highest rainfall) is November (283mm).
The driest month (with the least rainfall) is March (45mm).

Average rainfall days in September
Dieu Viên, Vietnam
  • Average rainfall days in September: 24.8 days

The month with the highest number of rainy days is October (27.1 days).
The months with the least rainy days are March and April (14.8 days).

Average daylight in September /
Average sunshine in September
Dieu Viên, Vietnam
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 24min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is June (Average sunshine: 11h and 0min).
The months with the least sunshine are January and December (Average sunshine: 3h and 48min).

Average sunshine days in September
Dieu Viên, Vietnam
  • Average sunshine days in September: 4.1 days

The month with the most sunshine days is March (12.8 days).
The month with the least sunshine days is December (2.4 days).

Average UV index in September
Dieu Viên, Vietnam
  • Average UV index in September: 7

The months with the highest UV index are March, April, May, June, July, August and September (UV index 7).
The months with the lowest UV index are January and December (UV index 5).

Average cloud cover in September
Dieu Viên, Vietnam
  • Average cloud cover in September: 36

The month with the most cloud cover is December (Cloud cover 74).
The month with the least cloud cover is May (Cloud cover 27).

Average visibility in September
Dieu Viên, Vietnam
  • Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September and October (10km).
The months with the lowest visibility are November and December (9km).

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