Climate of Guinea

Last updated: April 14, 2025

Guinea's climate is characterized by a diverse range of temperatures and precipitation patterns, influenced by its varied geography. The minimum temperature can drop to a cool 12°C (54°F) in December in Nzerekore, while the hottest month, May, can see extremes of up to 44°C (112°F) in Boke. Rainfall varies significantly across the year, with the driest month, December, recording no precipitation in Labe, contrasting sharply with the peak of the rainy season in July, when Conakry can receive a staggering 1,045 mm (41.2 in) of rainfall. Humidity levels fluctuate dramatically as well, ranging from an average minimum of 24% in January in Kankan to a lush 93% in August in Nzerekore, painting a vivid picture of Guinea's dynamic climate landscape.

Guinea Climate Zones

Guinea's diverse climate zones are primarily classified under the Köppen-Geiger system, featuring a mix of tropical savanna and monsoon climates. In coastal regions like Conakry and Boke, the climate leans towards Am, characterized by warm temperatures and significant rainfall, fostering lush greenery. Meanwhile, areas such as Faranah, Kankan, Labe, and Mamou fall under the Aw category, marked by a distinct dry season that influences local agriculture. The picturesque Nzerekore region showcases both Aw and Am climates, embodying the tropical essence of Guinea while benefiting from rich biodiversity. As a whole, Guinea's climate is a vital element shaping its ecosystems and way of life.

Köppen-Geiger Climate Classification of Guinea
Climate ZoneDescription
AmTropical monsoon climate with heavy rainfall and high temperatures.
AwTropical savanna climate with a dry season occurring in winter.

Guinea Temperature by Month

Guinea experiences a diverse range of temperatures throughout the year, showcasing both the warmth and cooler spots within the region. January opens the year with a minimum of 12°C (55°F) in Nzerekore while temperatures peak at a scorching 40°C (105°F) in Boke. As the months progress, the heat intensifies, reaching its zenith in May with a striking maximum of 44°C (112°F) in Boke. Interestingly, June marks a slight reprieve as temperatures begin to cool, navigating down to 40°C (105°F) once more. A more noticeable drop occurs in July and August, when the maximum temperature falls to a comfortable 36°C (97°F) and 34°C (93°F) respectively, coinciding with the rainy season. As autumn approaches, the temperatures continue to moderate, reflecting a gradual transition towards cooler months, with December finishing the year at 39°C (102°F) in Boke. With these variations, Guinea's climate not only captivates with extremes but also offers a rhythm of seasonal change that influences both the environment and daily life.

Monthly Temperatures in Guinea

The chart illustrates Guinea's temperature patterns throughout the year, with values aggregated from various locations across the region. It highlights seasonal variations and temperature changes across the months.
JanFebMarAprMayJunJulAugSepOctNovDec808284868682797879808080
Data source: Guinea temperature data aggregated from multiple country locations, generated using Copernicus Climate Change Service information.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

Precipitation Patterns in Guinea

Guinea's precipitation patterns reveal striking contrasts throughout the year, characterized by significant seasonal shifts. For instance, while December in Labe experiences a dry spell with no recorded rainfall, the heart of the rainy season arrives in July in Conakry, where an impressive 1,045 mm (41.2 in) of rain can fall over 31 days. This cycle underscores the country's reliance on the intense rainy months, which not only contribute to local agriculture but also shape the annual climate experience. Conversely, February in Kankan exemplifies the extremes of the dry season with zero precipitation, highlighting the stark variations that define Guinea's unique climate landscape.

Precipitation Trends in Guinea

The chart illustrates Guinea's yearly temperature patterns, showing data aggregated from various locations across the region, highlighting seasonal variations and monthly temperature changes.
JanFebMarAprMayJunJulAugSepOctNovDec001436158500597403204541
Data source: Guinea precipitation data aggregated from multiple country locations, generated using Copernicus Climate Change Service information.
Choose your preferred precipitation unit

Guinea Humidity

In Guinea, humidity levels showcase a striking seasonal contrast that reflects the region's diverse climate. January brings a dry respite, with minimum humidity plunging to a comfortable 24% in Kankan, making it an ideal time for outdoor activities. However, as the year progresses into August, the humidity soars to a staggering 93% in Nzerekore, creating a muggy atmosphere that can feel oppressively wet. This shift highlights the significant humidity variations across seasons, shaping the daily lives and experiences of Guinea's residents.

Average Humidity in Guinea

Guinea's Average Monthly Humidity Levels: This chart highlights Guinea's humidity fluctuations throughout the year, making it easy to compare seasonal trends. See how humidity varies month by month and understand Guinea's climate patterns.
JanFebMarAprMayJunJulAugSepOctNovDec27%33%34%49%61%80%86%90%88%87%77%46%
Data source: Humidity data for Guinea generated using information from the Copernicus Climate Change Service.

Guinea UV Index Trends

In Guinea, the UV Index trends reveal consistently high levels of solar radiation, particularly in its prominent cities. Both Conakry and Kankan experience an average daily maximum UV Index of 14 during the peak summer months of August and September, indicating a persistent intensity in UV exposure. This consistency suggests that residents and visitors alike should remain vigilant about sun protection during these months, as the elevated UV levels pose potential health risks. As such, understanding these patterns is crucial for effective sun safety practices across the region.

Maximum UV Index Levels in Guinea

The chart shows the monthly maximum UV Index (UVI) in Guinea, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec10111212131313141412109
Data source: Guinea UV Index data aggregated from multiple regional locations, generated using Copernicus Climate Change Service information.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

Sunshine Duration in Guinea

In Guinea, sunshine duration reveals notable regional and seasonal variations. For instance, while Conakry basks in only 189 hours of sunlight in August, Kankan enjoys a much sunnier month with 254 hours. As the year progresses, December shines brightly in Nzerekore with an impressive 305 hours, demonstrating that this region is not shy of sunshine even in the cooler months. March takes the lead across the country, particularly in Labe, where the sun dazzles for a remarkable 334 hours, showcasing the country’s capacity for abundant sunlight during transitional seasons. These patterns underscore how geography and time of year interplay to shape the sun's embrace across Guinea.

Monthly Sunshine Duration in Guinea

The Guinea sunshine duration chart shows the total hours of direct sunlight in Guinea each month, excluding cloudy or obstructed periods, and compares the sunshine duration across different months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec259h293h333h324h326h272h246h213h246h284h291h318h
Data source: Guinea sunshine duration data aggregated from multiple country locations, generated using Copernicus Climate Change Service information.

Chance of Sun in Guinea

In Guinea, the likelihood of sunny weather varies dramatically throughout the year and across different regions. For example, in Mamou, the chances of enjoying a clear sky are quite low at just 6% in August. In contrast, Kankan boasts a significantly higher probability of sunshine, with 80% in January showcasing its appeal during the dry season. This stark contrast highlights how seasonal shifts influence weather patterns, making Guinea a diverse destination for those seeking sunny escapes. Whether you're planning a trip to the lush landscapes of Mamou or the vibrant atmosphere of Kankan, understanding these trends can help tailor your visit for the best weather experience.

Percentage of Sunny Days in Guinea

The chart illustrates the percentage of sunny days in Guinea throughout the year. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Guinea experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec72%70%66%68%45%28%17%9%24%23%47%53%
Data source: Guinea chance of sun data, generated using information from the Copernicus Climate Change Service.

Average Daylight Hours Across the Guinea

In Guinea, particularly in the city of Labe, daylight hours exhibit a notable seasonal trend. During December, residents enjoy around 11 hours of daylight, while this increases to approximately 12 hours in June. This gradual shift in daylight not only enhances the vibrancy of daily activities but also reflects the region's transition from the shorter days of winter to the longer, sunlit hours of summer. Such variations influence both lifestyle and natural rhythms, highlighting the dynamic relationship between Guinea's climate and its inhabitants.

Average Monthly Daylight Hours in Guinea

This chart shows the total daylight hours Guinea receives each month, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec11h 31m11h 45m12h 3m12h 21m12h 37m12h 44m12h 40m12h 27m12h 9m11h 50m11h 35m11h 27m
Data source: Guinea daylight hours, calculated by summing the hours between sunrise and sunset for each day.

Climate Breakdown by Guinea Region

Nestled in Guinea, Boke experiences a tropical climate characterized by soaring temperatures and a distinct wet season. From January to March, the mercury can rise to a sweltering 42°C (109°F), while humidity levels begin to climb, peaking at an oppressive 89% by August. The rainy season, particularly intense in July and August, transforms the region with significant downpours, accumulating over 597 mm (23.5 inches) in August alone. Despite the sultry conditions, temperatures remain warm year-round, making Boke an alluring destination for those who thrive in heat and lush landscapes. For a detailed exploration, visit Boke climate.

Conakry, Guinea, offers a tropical climate characterized by warm temperatures and significant rainfall throughout the year. From January to April, the city enjoys mild temperatures, hovering around 24-30°C (76-87°F), with minimal precipitation, particularly in January and February. However, the arrival of the rainy season in May brings a dramatic shift, with humidity soaring to 90% in August and rainfall peaking at a staggering 1,045 mm (41.2 in) in July. Despite the heavy rains, temperatures remain consistent, ensuring that Conakry retains its warm, tropical charm. For a more detailed insight, explore the full Conakry climate.

Faranah, Guinea experiences a tropical climate characterized by a striking temperature range and distinct wet and dry seasons. January welcomes the cool, dry air with temperatures dipping as low as 13°C (55°F), while March and April see the heat peak at a scorching 41°C (106°F). As the wet season approaches, humidity escalates, reaching a peak of 92% in August, accompanied by heavy rainfall—up to 295 mm (11.6 in). The lively monsoon months from May to September transform the landscape, while the drier months offer respite from the heat. For an in-depth look at the weather patterns, check out the Faranah climate.

Nestled in Guinea, Kankan experiences a tropical climate with pronounced seasonal variations. The warmest months occur between March and May, where temperatures can soar to a sweltering 42°C (107°F). As the rainy season kicks in from May through September, humidity levels peak, creating a lush environment with heavy rainfall that reaches up to 282 mm (11.1 in) in August. Conversely, the drier months of December and January bring cooler conditions, making them ideal for visitors seeking a milder climate. For more detailed insights, check out the full Kankan climate.

Kindia, Guinea, experiences a tropical climate characterized by warm temperatures and high humidity throughout the year. January begins with comforting averages around 26°C (80°F), but by March, temperatures peak at a sizzling 40°C (104°F). As the rainy season sets in from May to August, the region sees significant precipitation, with July receiving a staggering 733 mm (28.8 in). The humidity during these months climbs to an enveloping 85%, making the atmosphere feel even more intense. For a detailed look at what the climate has to offer, check out Kindia climate.

Labe, Guinea, showcases a tropical climate marked by a distinct wet and dry season. Temperatures soar in the first half of the year, peaking in April and May with highs reaching 39°C (103°F). As the rainy season kicks in during June, so does the humidity, often exceeding 90% in the peak months of July and August, with substantial rainfall that can surpass 440 mm (17.3 in) in August alone. The climate remains warm and tropical throughout the year, with cooler months in January and December where temperatures can dip to around 12°C (55°F). For a deeper dive into the nuances of Labe's weather patterns, explore more at Labe climate.

Nestled in the heart of Guinea, Mamou boasts a tropical climate characterized by distinct wet and dry seasons. The year begins with pleasant temperatures averaging around 24°C (76°F), but as February rolls in, the heat escalates, peaking in April and May with highs that can reach 38°C (101°F). Rainfall is minimal until the onset of the rainy season in May, where precipitation surges, culminating in August with 521 mm (20.5 in) of rain. Humidity also climbs significantly, peaking in the humid summer months, creating a lush and vibrant environment. For comprehensive insights, check the detailed Mamou climate.

Nzerekore, Guinea, experiences a tropical climate marked by warm temperatures and significant rainfall, making it an inviting yet humid destination. From January to April, temperatures range from a comfortable 12°C to a sizzling 39°C, while humidity gradually rises, peaking in the sultry months of June through August, when levels soar to 93%. The region's rainfall is most prolific from May to September, with July and August receiving upwards of 280 mm. This seasonality enriches the lush landscapes but also demands a tolerance for the tropical moisture. For those interested in a detailed overview, the Nzerekore climate page provides comprehensive insights.

Summary and Key Takeaways on the Climate of the Guinea

The climate of Guinea presents a striking contrast between its extreme temperatures and significant seasonal rainfall, shaping the diverse landscapes and lifestyles within the region. In the coastal city of Boke, sweltering heat peaks at a blistering 44°C (112°F) in May, while the serene landscapes of Nzerekore enjoy cooler December nights that dip to 12°C (54°F). This temperature variability is complemented by substantial precipitation, as exemplified by Conakry, where the rainy season in July can unleash over 1045 mm (41.2 in) of rainfall, contrasting sharply with the dry spell in December in Labe when precipitation plummets to zero. Coupled with dramatic shifts in humidity—ranging from a dry 24% in January in Kankan to a staggering 93% in August in Nzerekore—the climate of Guinea is a vivid tapestry of weather patterns that deeply influences its ecology and the daily lives of its people.