April weather forecast
Ratnapura, Sri Lanka

Ratnapura greets April with increased heat, temperatures peaking around 30°C (86°F). A significant surge in rainfall leaves 248mm (9.76") drenched across almost all the days of April. The city also witnesses a dramatic reduction in sunshine hours, marking a stark transition. Despite the weather growing increasingly turbid, average wind speeds manage to climb only slightly, resting at a moderate 4.3km/h (2.7mph).

Temperature

As Ratnapura transitions into April, the average high-temperature stands at a still hot 30°C (86°F), offering little variation from the preceding month. During the month of April, the temperature in Ratnapura generally drops to a low average of 21.1°C (70°F).

Heat index

The heat index value for April is evaluated at a sweltering 39°C (102.2°F). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.
Heat index readings emphasize conditions of light breezes and shaded spots. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is an estimation of the warmth sensation when considering humidity levels. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.

Humidity

In Ratnapura, the average relative humidity in April is 86%.

Rainfall

In April, the rain falls for 29.4 days. Throughout April, 248mm (9.76") of precipitation is accumulated. Throughout the year, there are 317.3 rainfall days, and 2422mm (95.35") of precipitation is accumulated.

Daylight

In Ratnapura, the average length of the day in April is 12h and 16min.
On the first day of the month, sunrise is at 06:06 and sunset at 18:17. On the last day of April, sunrise is at 05:54 and sunset at 18:16 +0530.

Sunshine

With an average of 8.4h of sunshine, April has the most sunshine of the year.

UV index

January through August, November and December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In April, the maximum UV index of 6 transforms into these recommendations:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.