October weather forecast
Jaffna, Sri Lanka

The weather in October registers the highest rainfall in Jaffna, with a whopping 191mm (7.52") precipitation. Tremendous moisture, accumulated in clouds, is released over 22.6 days of the month. An understanding of Jaffna's traditional climatic rhythm suggests that the rainy season intensifies during this month. Given the considerable change in weather, temperatures cool down slightly while occasional sunshine still graces the sky.

Temperature

The arrival of October is marked by an average high-temperature of a still moderately hot 29.2°C (84.6°F), bearing a close resemblance to September. Consistently, Jaffna reports average nighttime temperatures of 27.7°C (81.9°F) during October, a marginal step down from its daytime highs.

Heat index

October's mean heat index is calculated to be a fiery hot 35°C (95°F). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', reflects the feeling of heat when considering both air temperature and humidity. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
One of the main methods the human body employs to cool down is by perspiring, as this process allows sweat to evaporate and remove excess heat. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

The average relative humidity in October is 77%.

Rainfall

October is the month with the most rainfall. Rain falls for 22.6 days and accumulates 191mm (7.52") of precipitation.

Sea temperature

In October, the average sea temperature in Jaffna is 29.3°C (84.7°F).
Note: Swimming, diving, and similar water activities in temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are seen as very agreeable and pleasurable for lengthy periods without discomfort.

Daylight

The average length of the day in October is 11h and 55min.
On the first day of October, sunrise is at 05:58 and sunset at 18:00. On the last day of the month, sunrise is at 05:59 and sunset at 17:47 +0530.

Sunshine

In Jaffna, the average sunshine in October is 8.5h.

UV index

January through October and December, with an average maximum UV index of 7, are months with the highest UV index in Jaffna. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: A typical high UV index of 7 in October suggests the following recommendations:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Caution! Sand and water surfaces escalate the UV intensity from the Sun.