April weather forecast
Ragama, Sri Lanka

April, like March, is another tropical spring month in Ragama, Sri Lanka, with an average temperature ranging between max 31.8°C (89.2°F) and min 25.8°C (78.4°F).

Temperature

The warmest period is usually observed in March and April, with the average high-temperature peaking at 31.8°C (89.2°F).

Heat index

For most parts of April, the heat index is appraised at a blisteringly hot 42°C (107.6°F). Undertake additional safety actions, risk of heat cramps and heat exhaustion is significant. Persistent activity may induce heatstroke.
Keep in mind the heat index values are meant for areas in shade and with light wind. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

In Ragama, the average relative humidity in April is 77%.

Rainfall

In Ragama, during April, the rain falls for 25.4 days and regularly aggregates up to 137mm (5.39") of precipitation. In Ragama, Sri Lanka, during the entire year, the rain falls for 289.4 days and collects up to 2262mm (89.06") of precipitation.

Daylight

In Ragama, the average length of the day in April is 12h and 17min.
On the first day of April in Ragama, sunrise is at 06:08 and sunset at 18:19. On the last day of the month, sunrise is at 05:56 and sunset at 18:18 +0530.

Sunshine

In Ragama, the average sunshine in April is 8.9h.

UV index

The months with the highest UV index are January through April, July, September, November and December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index of 7 during April leads to these instructions:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat.