October weather forecast
Vavuniya, Sri Lanka

October in Vavuniya begins the transition into cooler and drier days, even as it hosts some of the year's most abundant showers. The average monthly rainfall climbs to 205mm (8.07"), resulting in plenty of wet days. In sync with the shift in weather patterns, the temperature averages also witness a distinct drop compared to previous months. Outdoor enthusiasts find October an ideal month for activities, as conditions are generally mild, with a gentle breeze blowing through the city. Despite the showers, October also maintains a decent amount of sunlight, avoiding a complete wash-out of the city's lively daytime proceedings.

Temperature

October's onset brings an average high-temperature of a still hot 31.8°C (89.2°F), showing a minute difference from September's 32.6°C (90.7°F). During October, Vavuniya records a consistent average nighttime temperature of 23.9°C (75°F).

Heat index

Throughout October, the heat index is estimated at a blisteringly hot 42°C (107.6°F). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.
Observations indicate that the heat index values are for shady locations with light wind. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'real feel' or 'apparent temperature', joins air temperature with relative humidity to produce a temperature perception for humans. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In October, the average relative humidity in Vavuniya is 77%.

Rainfall

The month with the most rainfall in Vavuniya is October, when the rain falls for 23.1 days and typically aggregates up to 205mm (8.07") of precipitation.

Daylight

The average length of the day in October is 11h and 56min.
On the first day of the month, sunrise is at 05:56 and sunset at 17:59. On the last day of October, sunrise is at 05:57 and sunset at 17:46 +0530.

Sunshine

In October, the average sunshine in Vavuniya is 7.9h.

UV index

The months with the lowest UV index are January, October through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index of 6 in October interprets into the following recommendations:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.