April weather forecast
Waterloo, Sierra Leone

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Weather in April

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.

Frequently asked questions

How hot is April in Waterloo?

In Waterloo, in April, the average high-temperature is 30.8°C (87.4°F), and the average low-temperature is 25.3°C (77.5°F). In April, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is calculated to be 38°C (100.4°F).

What is the average humidity in April in Waterloo?

In April, the average relative humidity in Waterloo, Sierra Leone, is 74%.

How much does it rain in Waterloo in April?

In Waterloo, Sierra Leone, in April, during 9.7 rainfall days, 18mm (0.71") of precipitation is typically accumulated.

How many hours of daylight does Waterloo have in April?

In Waterloo, the average day length in April is 12h and 19min.

When are sunrise and sunset in April in Waterloo?

On the first day of April in Waterloo, Sierra Leone, 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.

How long on average sun shines in April in Waterloo?

In April, the average sunshine duration in Waterloo is 9.5h.

What are the months with the highest UV index in Waterloo?

January through June, September through December, with an average maximum UV index of 7, are months with the highest UV index.

What is the UV index intensity in April in Waterloo?

The average daily maximum UV index in April in Waterloo, Sierra Leone, is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to Sun's UV rays.

Average temperature in April
Waterloo, Sierra Leone

Average temperature in April - Waterloo, Sierra Leone
  • Average high temperature in April: 30.8°C

The warmest month (with the highest average high temperature) is January (31.4°C).
The month with the lowest average high temperature is August (27.3°C).

  • Average low temperature in April: 25.3°C

The month with the highest average low temperature is May (26.2°C).
The coldest month (with the lowest average low temperature) is August (23.9°C).

Average pressure in April
Waterloo, Sierra Leone

Average pressure in April - Waterloo, Sierra Leone
  • Average pressure in April: 1010.5mbar

The month with the highest atmospheric pressure is July (1013.8mbar).
The months with the lowest atmospheric pressure are February and March (1010.4mbar).

Average wind speed in April
Waterloo, Sierra Leone

Average wind speed in April - Waterloo, Sierra Leone
  • Average wind speed in April: 11.6km/h

The windiest month (with the highest average wind speed) is August (12km/h).
The calmest month (with the lowest average wind speed) is November (6.8km/h).

Average humidity in April
Waterloo, Sierra Leone

Average humidity in April - Waterloo, Sierra Leone
  • Average humidity in April: 74%

The month with the highest relative humidity is August (86%).
The month with the lowest relative humidity is January (68%).

Average rainfall in April
Waterloo, Sierra Leone

Average rainfall in April - Waterloo, Sierra Leone
  • Average rainfall in April: 18mm

The wettest month (with the highest rainfall) is August (391mm).
The driest month (with the least rainfall) is February (1mm).

Average rainfall days in April
Waterloo, Sierra Leone

Average rainfall days in April - Waterloo, Sierra Leone
  • Average rainfall days in April: 9.7 days

The month with the highest number of rainy days is July (30.3 days).
The month with the least rainy days is February (0.8 days).

Average daylight in April /
Average sunshine in April
Waterloo, Sierra Leone

Average daylight in April / Average sunshine in April - Waterloo, Sierra Leone
  • Average daylight in April: 12h and 2min

The month with the longest days is June (Average daylight: 12h and 36min).
The month with the shortest days is December (Average daylight: 11h and 42min).

  • Average sunshine in April: 9h and 3min

The month with the most sunshine is February (Average sunshine: 9h and 54min).
The month with the least sunshine is August (Average sunshine: 4h and 48min).

Average sunshine days in April
Waterloo, Sierra Leone

Average sunshine days in April - Waterloo, Sierra Leone
  • Average sunshine days in April: 18.6 days

The month with the most sunshine days is January (29 days).
The month with the least sunshine days is August (0.5 days).

Average UV index in April
Waterloo, Sierra Leone

Average UV index in April - Waterloo, Sierra Leone
  • Average UV index in April: 7

The months with the highest UV index are January, February, March, April, May, June, September, October, November and December (UV index 7).
The months with the lowest UV index are July and August (UV index 6).

Average cloud cover in April
Waterloo, Sierra Leone

Average cloud cover in April - Waterloo, Sierra Leone
  • Average cloud cover in April: 22

The month with the most cloud cover is August (Cloud cover 67).
The month with the least cloud cover is February (Cloud cover 11).

Average visibility in April
Waterloo, Sierra Leone

Average visibility in April - Waterloo, Sierra Leone
  • Average visibility in April: 10km

The months with the highest visibility are January, February, March, April, May, June, October, November and December (10km).
The months with the lowest visibility are July, August and September (9km).

Waterloo, Sierra Leone

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