October weather forecast
Hanoi, Vietnam

October in Hanoi brings in the autumn with slightly chillier temperatures. A remarkable attribute of this month's weather would be the sharp decrease in precipitation to 46mm (1.81"), compared to the previous high rainfall months. This reduction in rainfall, coupled with pleasant temperatures, sets a calming ambiance in the city. Moving into November, the city preserves this decrease in rainfall whilst experiencing further cooling temperatures.

Temperature

Upon the onset of October, Hanoi witnesses an average high-temperature of a warm 29.6°C (85.3°F), showing a close resemblance to the prior month. An average nighttime temperature of 22.1°C (71.8°F) is observed during October.

Heat index

The heat index value for October is evaluated at a sweltering 35°C (95°F). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', evaluates the perceived heat by adding the effect of moisture in the air. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. Heightened relative humidity interferes with the body's usual cooling mechanism by reducing evaporation, subsequently decreasing the body's cooling rate and increasing the sensation of heat. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

In Hanoi, the average relative humidity in October is 74%.

Rainfall

In October, the rain falls for 14 days. Throughout October, 46mm (1.81") of precipitation is accumulated. In Hanoi, during the entire year, the rain falls for 181.2 days and collects up to 595mm (23.43") of precipitation.

Daylight

In Hanoi, the average length of the day in October is 11h and 40min.
On the first day of the month, sunrise is at 05:47 and sunset at 17:44. On the last day of October, sunrise is at 05:58 and sunset at 17:21 +07.

Sunshine

In Hanoi, the average sunshine in October is 6.9h.

UV index

In October, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: A maximum UV index of 6 in October translates into the following recommendations:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. 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. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.