April weather forecast
Waterloo, Sierra Leone

In Waterloo, April brings about a considerable transition from the rather dry first quarter, with rainfall reaching 18mm (0.71"). The increment in rainfall and relative humidity introduces a slightly muggy environment. Consistent cloud coverage ensures diffused daylight, influencing the outdoor temperatures. The wind intensity doesn’t undergo a significant shift but may carry increased moisture. The weather pattern evident this month sets the stage for the ensuing wetter months of the year.

Temperature

In April, the average high-temperature registers at a still tropical 30.8°C (87.4°F), nearly identical to March's 31°C (87.8°F). Nightly temperatures in Waterloo drop to an average low of 25.3°C (77.5°F) in April.

Heat index

April's average heat index is calculated to be a fiery hot 38°C (100.4°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. 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 April is 74%.

Rainfall

In April, in Waterloo, the rain falls for 9.7 days. Throughout April, 18mm (0.71") of precipitation is accumulated. Throughout the year, in Waterloo, there are 205.9 rainfall days, and 1507mm (59.33") of precipitation is accumulated.

Daylight

The average length of the day in April in Waterloo is 12h and 19min.
On the first day of April in Waterloo, sunrise is at 06:49 and sunset at 19:02. On the last day of the month, sunrise is at 06:36 and sunset at 19:01 GMT.

Sunshine

The average sunshine in April is 9.5h.

UV index

The months with the highest UV index are January through June, September through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for average individuals.
Note: A maximum high UV index of 7 in April translates into the following recommendations:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. 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. To cut down UV radiation exposure by about half, sport a wide-brim hat.