November weather forecast
Colombo, Sri Lanka

In November, the drying trend reaches its peak with a significant drop in rainfall to 191mm (7.52"), creating a noticeably less humid environment. Temperatures cool just slightly, providing a hint of the cooler season to come. The falling cloud cover displays stunning sunsets every evening, creating a colorful end to the day. November's gentle breezes soften the warmer temperatures, making it an inviting time to experience the cultural diversity and architecture of Colombo.

Temperature

With November's arrival, Colombo notes an average high-temperature of a still hot 30.1°C (86.2°F), closely following the trend of the preceding month. Colombo records an average low-temperature of 24.5°C (76.1°F) throughout the month of November.

Heat index

The heat index value for November is computed to be a fiery hot 38°C (100.4°F). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly relevant to children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.

Humidity

In November, the average relative humidity is 79%.

Rainfall

In Colombo, during November, the rain falls for 25.7 days and regularly aggregates up to 191mm (7.52") of precipitation. In Colombo, Sri Lanka, during the entire year, the rain falls for 289.4 days and collects up to 2262mm (89.06") of precipitation.

Sea temperature

In Colombo, the average seawater temperature in November is 28.8°C (83.8°F).
Note: For swimming, diving, and similar activities, the water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered delightful, allowing for extended periods of enjoyment without discomfort.

Daylight

The average length of the day in November in Colombo is 11h and 49min.
On the first day of the month, sunrise is at 05:57 and sunset at 17:50. On the last day of November, in Colombo, sunrise is at 06:06 and sunset at 17:51 +0530.

Sunshine

November has the least sunshine of the year in Colombo, Sri Lanka, with an average of 6.7h of sunshine.

UV index

January through April, July, September, November and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: A maximum high UV index of 7 in November translates into the following recommendations:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Stay cautious! Sand and water reflections increase UV radiation potency.