Last updated: January 18, 2025
Guadalcanal, located in the Solomon Islands, exhibits a tropical rainforest climate classified under the Köppen-Geiger system as Af. The region experiences consistently warm temperatures throughout the year, with a minimum of 21°C (71°F) recorded in August and a maximum reaching up to 32°C (89°F) in January. The average temperature hovers around 26°C (78°F), creating a stable, humid environment that fosters rich biodiversity and lush vegetation. These climatic conditions play a pivotal role in defining the ecological and cultural character of Guadalcanal.
In Guadalcanal, the temperature patterns exhibit a warm and relatively stable climate throughout the year. The minimum temperatures range from 21°C (71°F) in August to 23°C (73°F) in several other months, while average temperatures remain consistently around 25°C to 26°C (78°F to 79°F). Maximum temperatures peak at 32°C (89°F) in the height of January and February, gradually cooling to 30°C (87°F) in the cooler months of June and August. Despite slight fluctuations, the overall seasonal variation is minimal, suggesting a persistent tropical warmth that characterizes this lush island environment.
In Malango, temperatures vary throughout the year, with a minimum of 21°C (71°F) in August and a maximum of 32°C (89°F) in January. This range reflects the tropical climate typical of the Solomon Islands, making it an appealing destination for those who enjoy warm weather. For more detailed information on monthly temperatures in Malango, visit monthly temperatures in Malango.
Guadalcanal experiences significant rainfall throughout the year, with March emerging as the wettest month, receiving an impressive 705 mm (27.7 in) of precipitation over 29 days. Following closely are February and April, which garner 565 mm (22.3 in) and 546 mm (21.5 in), respectively. This tropical island typically witnesses a pattern where the peak rainfall months coincide with extended rainy days, as exemplified by February's 27 days of rain and March's maximum precipitation, contributing to a lush, verdant landscape.
As the year progresses, the precipitation amounts begin to taper off, particularly in the latter half. May to August reflects a notable reduction in rainfall, with May recording 341 mm (13.4 in) and August receiving 387 mm (15.2 in). Subsequent months like September and October bring moderate rainfall, maintaining averages around 492 mm (19.4 in) and 497 mm (19.6 in). Despite these variations, the steady frequency of rainy days, ranging from 24 to 29 days a month, ensures that the climate remains humid and supports the region's rich biodiversity.
In Guadalcanal, the duration of sunshine reflects a distinct seasonal pattern, with May emerging as the sunniest month, boasting an impressive 273 hours of bright daylight. Following closely are October and November, which also enjoy generous sunshine, recording 281 hours and 270 hours, respectively. This trend showcases a gradual increase in sunshine hours from the cooler months of January (218 hours) and February (201 hours), culminating in peak sunshine during the late spring and early summer, making this period ideal for outdoor activities and exploration.
Conversely, the months of January and February exhibit the lowest sunshine durations, which correspond to higher precipitation levels typical of the rainy season. As the year progresses, from April (231 hours) to August (268 hours), there is a consistent and encouraging rise in available sunshine, indicating a positive shift towards drier, sunnier conditions. This pattern illustrates Guadalcanal's transition from the wet season to the relatively drier, sunnier months, enhancing its appeal as a tropical paradise during the latter half of the year.
The UV Index in Guadalcanal reveals significant levels of solar radiation year-round, with values predominantly categorized as extreme. The months of January, February, and March record peak UV indices of 15 and 16, indicating a very high risk of harm from unprotected sun exposure, with a burn time as short as 10 minutes. This extreme exposure highlights the importance of protective measures such as sunscreen, hats, and long clothing for anyone spending time outdoors during these months. Notably, the UV Index remains consistently high throughout the year, maintaining values between 12 to 16.
As Guadalcanal transitions into the later months of the year, there is a slight decrease in the UV Index, particularly in June when it drops to 10, categorized as very high. However, even during this period, a burn time of 15 minutes indicates significant sun intensity. The trend remains consistent into the following months, with the UV Index generally ranging from 12 to 15 until the end of the year. This persistent high level of solar radiation emphasizes the need for vigilant sun safety practices, regardless of the season, as residents and visitors alike navigate the tropical sunlight of this island paradise.
UV Risk Categories
In Guadalcanal, daylight duration remains remarkably consistent throughout the year, predominantly around 12 hours per day from January to March. This stability reflects the island's equatorial location, providing nearly equal amounts of daylight and darkness regardless of the season. As the year progresses into April, May, and June, daylight gradually decreases to 11 hours, marking a subtle shift during the cooler months but without significant variation in overall daylight experience.
As the island transitions back to longer days, by September, October, and into November and December, daylight returns to the 12-hour mark. This cyclical pattern highlights the predictable nature of sunlight in Guadalcanal, where residents and visitors can rely on a stable daylight environment for outdoor activities year-round. The consistent availability of daylight supports both ecological rhythms and the vibrant sociocultural life of this tropical paradise.
Malango, Solomon Islands, experiences a tropical climate characterized by warm temperatures and significant rainfall throughout the year. Monthly average temperatures range from 25°C (78°F) to 26°C (79°F), with maximums generally peaking at 31°C (88°F) during most months. Precipitation is highest from March to April, with March receiving approximately 705 mm (27.7 in), while May sees a decline to 341 mm (13.4 in). The area benefits from substantial sunshine, particularly in May and October, both exceeding 270 hours. For more detailed information, visit Malango climate.
In conclusion, Guadalcanal's climate is characterized by warm temperatures, significant rainfall, high UV indices, and consistent daylight duration throughout the year. With a tropical rainforest climate, the months of January through March present the highest temperatures and precipitation, while the region enjoys an abundance of sunlight that supports its lush biodiversity. The UV Index remains extreme for much of the year, emphasizing the importance of sun safety for residents and visitors alike. Overall, these climatic features not only define the ecological landscape of Guadalcanal but also shape the daily lives and experiences of those who inhabit this vibrant island in the Solomon Islands.