Sierra Leone climate

World Climates covers 4 places in Sierra Leone. By annual mean temperature, the warmest is Bo (26 °C80 °F) and the coolest is Koidu (26 °C78 °F). The wettest is Freetown with 2,570 mm101 in of precipitation per year, the driest Kenema with 1,933 mm76 in.

The most common climate types (Köppen classification computed from these averages) are tropical savanna (dry winter) (Aw, 3 places) and tropical monsoon (Am, 1 place).

The highest monthly average high is in Koidu (35 °C95 °F in March); the lowest monthly average low is in Koidu (18 °C64 °F in January).

Across the places in Sierra Leone, the months that most often rank as the most comfortable are January, November and December (1, 3 and 4 of 4 places respectively).

Temperature and rainfall across Sierra Leone

Annual mean temperatures in Sierra Leone range from 26 °C78 °F to 26 °C80 °F. The typical place (the median of all 4) has a year average of 26 °C79 °F. Annual precipitation ranges from 1,933 mm76 in to 2,570 mm101 in. The median place receives about 1,981 mm78 in in an average year.

In 0 places of 4, the coldest month has an average low below 0 °C (32 °F). In 4 places, the warmest month has an average high above 30 °C (86 °F). No place here gets less than 250 mm (10 in) of precipitation a year. 2 places get more than 2,000 mm (79 in), which is very wet.

Averaged over all 4 places, April is the warmest month, with a mean of 29 °C83 °F. August is the coldest, with 24 °C76 °F. The wettest month on average is August (529 mm21 in). The driest is January (1 mm0.0 in). Single places can differ a lot from this average, so check the page of each city.

The table below lists the places sorted by population. The largest ones covered here are Freetown, Kenema and Bo. Each city page has a chart and a table for every month. It also shows the best time to visit and what to pack. The figures are 25-year averages for 2001–2025 from NASA POWER. They describe grid cells of roughly 50–70 km, not single weather stations.

Climate of each place in Sierra Leone

Freetown has a tropical monsoon climate (Köppen Am). Its year average is 26 °C79 °F. The warmest month is April, with an average high of 31 °C88 °F. The coldest is August, with an average low of 23 °C74 °F. About 2,570 mm101 in of precipitation falls in a year. August is the wettest month and January the driest. By our comfort score, the best months to visit are December–February.

Kenema has a tropical savanna (dry winter) climate (Köppen Aw). Its year average is 26 °C79 °F. The warmest month is April, with an average high of 34 °C93 °F. The coldest is August, with an average low of 21 °C70 °F. About 1,933 mm76 in of precipitation falls in a year. August is the wettest month and January the driest. By our comfort score, the best months to visit are November and December.

Bo has a tropical savanna (dry winter) climate (Köppen Aw). Its year average is 26 °C80 °F. The warmest month is April, with an average high of 34 °C94 °F. The coldest is August, with an average low of 21 °C71 °F. About 1,938 mm76 in of precipitation falls in a year. August is the wettest month and January the driest. By our comfort score, the best months to visit are November and December.

Koidu has a tropical savanna (dry winter) climate (Köppen Aw). Its year average is 26 °C78 °F. The warmest month is March, with an average high of 35 °C95 °F. The coldest is August, with an average low of 20 °C68 °F. About 2,024 mm80 in of precipitation falls in a year. August is the wettest month and January the driest. By our comfort score, the best months to visit are November and December.

Frequently asked questions

Which is the warmest place in Sierra Leone?

By annual mean temperature, the warmest place in Sierra Leone is Bo at 26 °C80 °F. The coolest is Koidu at 26 °C78 °F.

Where does it rain the most in Sierra Leone?

Freetown gets the most precipitation, 2,570 mm101 in in an average year. The driest place is Kenema with 1,933 mm76 in.

How many places in Sierra Leone does this site cover?

World Climates has climate data for 4 places in Sierra Leone. Each one has a page with monthly averages for temperature, rainfall, humidity and daylight.

When is the best time to visit Sierra Leone?

It depends on the place. Across Sierra Leone, the months that most often rank as the most comfortable are January, November and December. Check the page of each city for its own best months.