Country Overview For Sierra Leone
The climate in Sierra Leone is typically tropical; hot, humid; summer rainy season (May to December); winter dry season (December to April). The terrain: coastal belt of mangrove swamps, wooded hill country, upland plateau, mountains in east. For Freetown in January the daily average maximum temperatures is 31°C with the average minimum 22°C, while in June the average maximum is 29°C with a minimum of 23°C. The wettest month for Freetown is June with an average of 388.2mm of precipitation falling while the driest month is February with 31.7mm falling.
HISTORICAL MONTHLY AVERAGES FOR MAY
The information presented below gives detailed historical monthly average weather conditions along with exceptional weather occurrences. To maintain relevance to current weather trends the displayed information has been calculated using data collected over the past two decades. The climate profile is taken from closest available data source to Kenema.
Temperature
Throughout the month of May daytime temperatures will generally reach highs of around 29°C that's about 84°F. At night the average minimum temperature drops down to around 23°C, that's 73°F.
In recent times the highest recorded temperature in May has been 40°C that's 103°F, with the lowest recorded temperature 15°C, about 58°F.
Relative Humidity
The average daily relative humidity for May is around 86%.
Heat Index
The Heat Index is a measure of how hot it feels when relative humidity is added to actual air temperature. From this a comfort level is calculated providing categories on how heat conditions might adversely affect someone.
Comfort Levels: Given average maximum temperatures and humidity levels caution is advised. Fatigue is possible with prolonged exposure and/or physical activity for those in high risk groups of possible heat disorders (see heat index for more information).
Precipitation
The average monthly amount of precipitation has been recorded at around 246 mm, that's 10 inches. Throughout the month you can expect to see rain or drizzle falling on 12 days of the month.
Wind
The average daily wind speed in May has been around 9 km/h, that’s the equivalent to about 6 mph, or 5 knots. In recent years the maximum sustained wind speed has reached 81 km/h, that’s the equivalent of around 51 mph, or 44 knots.
Fog
On average the month of May is not affected by foggy conditions.
YEARLY TRENDS: WEATHER AVERAGES & EXTREMES
The following charts show yearly weather trends with information on monthly weather averages and extremes.
Temperature
The chart below plots the average high and low temperature for each month of the year. It also shows the maximum and minimum recorded temperatures.
Precipitation Amount
The chart below plots the average monthly precipitation amount.
Rain days
The chart below plots the average number of days in any month that you can expect to see rain falling.
Wind Speed
The chart below plots the average daily wind speed you can expect for any month. It also shows the maximum recorded sustained wind speed for each month.