Ghana has a tropical climate characterized by warm temperatures year-round, distinct wet and dry seasons, and significant variation between the humid coast in the south and the drier savanna in the north. Average temperatures typically range from 24°C to 30°C (75°F to 86°F) depending on the region and time of year, and the country never experiences a true winter.
Two Climate Zones: South vs. North
Ghana sits just a few degrees north of the equator on West Africa’s Gulf of Guinea coast, and that geography creates two broad climate zones. The southern half of the country, including the capital Accra and the coastal and forested regions, is warm and humid with relatively moderate temperatures. The northern half, which transitions into open savanna, is hotter and drier, with wider swings between daytime and nighttime temperatures.
Coastal cities like Accra tend to hover around 25°C to 28°C for much of the year, with sea breezes keeping things relatively comfortable. Inland and northern areas like Tamale can push well above 35°C (95°F) during the hottest months of February through April, before the rains arrive and cool things down. Humidity is highest along the coast and in the forested southwest, where it can feel oppressive even when the actual temperature is moderate.
Rainy and Dry Seasons
Rainfall patterns differ noticeably between southern and northern Ghana. The south experiences two rainy seasons: a major one from roughly April to July and a minor one from September to November, with a short dry break in August. This double rainy season is driven by the movement of the Intertropical Convergence Zone, a belt of moisture-laden air that shifts north and south across West Africa over the course of the year.
Northern Ghana gets a single, continuous rainy season that runs from early April through October. This is the farming season for the region, with dry conditions dominating from early November to late March. Annual rainfall totals reflect the divide: the southwest can receive over 2,000 mm (about 80 inches) per year, while parts of the northern savanna may get only 1,000 mm (around 40 inches). The southeast coast around Accra is surprisingly dry for a tropical location, receiving as little as 750 mm annually.
The Harmattan: Ghana’s Dusty Dry Season
The most distinctive weather event in Ghana is the Harmattan, a dry, dust-carrying wind that blows from the northeast between November and March. It originates in the Bodélé Depression in the Chad basin, deep in the Sahara, and sweeps southwest across West Africa toward the Gulf of Guinea coast. During these months, the Harmattan replaces the moisture-rich southwest monsoon winds that dominate the rest of the year.
In northern Ghana, the Harmattan is strongest from December through early March. It carries fine dust particles that reduce visibility dramatically, sometimes to just a few hundred meters. The air becomes very dry, humidity drops sharply, and temperatures can swing widely between day and night. Daytime heat may reach 38°C, while nighttime temperatures in the north can dip below 20°C (68°F), which feels genuinely cold to local residents accustomed to tropical warmth. The dust settles on everything, dries out skin and lips, and can aggravate respiratory conditions.
By the time the Harmattan reaches southern Ghana, it has typically weakened. The dust haze is lighter and the drying effect less extreme, but Accra and other coastal cities still notice hazier skies and lower humidity during December and January. The coarser dust particles settle out during the wind’s long journey from the Sahara, so the dust that reaches the south is extremely fine.
How Climate Varies by Region
Ghana can be broken into roughly four climate subregions, each with its own feel:
- The southwest (Western Region, Ashanti): The wettest part of the country, covered in tropical rainforest. Expect heavy rainfall, high humidity, and lush green landscapes for most of the year. Temperatures stay fairly stable, rarely climbing above 32°C.
- The southeast coast (Greater Accra, Volta coast): Surprisingly dry and warm. Accra gets less rain than many people expect for a tropical capital. Sea breezes moderate the heat, but humidity can make it feel hotter than the thermometer suggests.
- The transitional zone (Brong-Ahafo, parts of Volta): A middle ground between forest and savanna. Rainfall is moderate, and temperatures are slightly higher than the coast.
- The northern savanna (Northern, Upper East, Upper West): The hottest and driest zone. A single rainy season, intense dry heat from February to April, and the strongest Harmattan effects. Vegetation is grassland and scattered trees rather than forest.
Rising Temperatures and Shifting Patterns
Ghana has been experiencing significant increases in surface temperatures over recent decades, consistent with broader trends across West Africa. Rainfall has also become less predictable, with some regions seeing shorter but more intense rainy seasons. For the northern regions, where agriculture depends entirely on seasonal rains, this variability has real consequences for farming schedules and crop yields. The dry season in parts of the north has been lengthening, and the Harmattan’s timing shifts slightly from year to year.
For travelers, the most comfortable time to visit most of Ghana is during the dry season from November to February, when humidity is lower and rainfall is minimal. The trade-off in the north is Harmattan dust. The rainy seasons bring cooler temperatures but also muddy roads and afternoon downpours that can disrupt plans, particularly in rural areas where infrastructure is limited.