October weather forecast
Kalmunai, Sri Lanka

The month of October marks the onset of the second monsoonal phase in Kalmunai. Rainfall climbs up to 177mm (6.97") adding a distinctly moist charm to the city. Aside from rainfall, all other parameters experience a slight decrease, enhancing the cool and soothing effect of monsoon. October in Kalmunai is a rain lover's paradise, with the city dressed in a fresh, dewy appeal. It is the perfect time for those who enjoy the romance of rainfall to visit the city.

Temperature

Kalmunai's transition from September to October introduces an average high-temperature of a still tropical 31°C (87.8°F), marking an insignificant variation from the 31.8°C (89.2°F). An average low-temperature of 25.1°C (77.2°F) is noted during the nights in October.

Heat index

For October, the heat index is estimated at a blistering 40°C (104°F). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
One should consider that heat index numbers are for shaded settings and light wind. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is an aggregate value of air's warmth and moisture to show the human-felt temperature. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

The average relative humidity in October is 76%.

Rainfall

In Kalmunai, Sri Lanka, during October, the rain falls for 25.5 days and regularly aggregates up to 177mm (6.97") of precipitation. Throughout the year, there are 237.8 rainfall days, and 1259mm (49.57") of precipitation is accumulated.

Sea temperature

In Kalmunai, Sri Lanka, in October, the average water temperature is 29°C (84.2°F).
Note: Swimming, diving, and other water activities in the temperature range of 25°C (77°F) to 29°C (84.2°F) are perceived as very enjoyable and comfortable for prolonged durations.

Daylight

In October, the average length of the day in Kalmunai is 11h and 58min.
On the first day of the month, sunrise is at 05:50 and sunset at 17:53. On the last day of October, in Kalmunai, Sri Lanka, sunrise is at 05:50 and sunset at 17:42 +0530.

Sunshine

In October, the average sunshine is 8.7h.

UV index

January through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for average individuals.
Note: In October, a daily maximum UV index of 7 leads to the following instructions:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Take heed! Reflections of sand and water make the Sun's UV rays stronger.