Climate and monthly weather forecastRennell Island, Solomon Islands
Climate and monthly weather forecast
The climate of Rennell Island
On Rennell Island, with its geographical position in the Solomon Islands and in the heart of the Pacific Ocean, the climate distinctly falls into the Af class of the Köppen climate classification. This specific classification denotes a uniformly tropical rainforest climate, characterized by high temperatures and significant rainfall throughout the year.Focused observations of climate data reveal weather parameters remaining relatively unvarying throughout the year. The highest monthly average temperature reaches a toasty 31°C (87.8°F), while the lowest average temperature does not fall far behind, maintaining a fairly constant 22°C (71.6°F) to 23°C (73.4°F). Rainfall exhibits a marginal increment, where the wettest month seeing about 330mm (12.99") and the driest month charting approximately 166mm (6.54"). This precipitation amounts to an average of 14 to 20 days of rainfall per month, reflecting the island's steady tropical climate.
Interestingly, the islands and their waters welcome generous daylight hours, varying from 11.5 hours to 12.8 hours per day. Correspondingly, sunshine duration hovers between 6 to 7 hours daily, regardless of the season. The UV index, a notable factor in the Pacific regions, sits unwavering at a high of 9 to 12. These climatic conditions, wrought with towering temperatures, profuse rain, and relentless sunshine, firmly anchor Rennell Island in its tropical rainforest climate category.
The best time to visit Rennell Island
The best time to visit Rennell Island, for those desiring a touch less rainfall and cooler temperatures, may fall between May and August. In these months, rainfall measures from 166mm (6.54") to 207mm (8.15"), slightly lower than the rest of the year. A small dip in temperature can also be observed, varying from 22°C (71.6°F) to 30°C (86°F), while sea temperatures remain mildly invigorating at 28°C (82.4°F). Additionally, the UV index decreases to 9, allowing for a slightly less harsh sun exposure during these months.The worst time to visit Rennell Island
Considerably, the least favorable time to visit Rennell Island is likely the span of time from December to March. The cumulative effect of high rainfall, averaging between 246mm (9.69") to 330mm (12.99") per month, consistent high temperatures, averaging 30°C (86°F) to 31°C (87.8°F), and a persistent UV index of 12, can make this period particularly challenging for those unaccustomed to such extreme tropical conditions.Spring weather in Rennell Island
During the months of September through November, the springtime on Rennell Island welcomes temperatures persisting between 22°C (71.6°F) to 31°C (87.8°F). Rainfall during this season fluctuates modestly from 176mm (6.93") to 189mm (7.44"), while rainy days account for just under half the month. Sunlight continues in its generosity with 11.7 hours to 12.6 hours of daylight, and a radiant 6 to 7 hours of sunshine.Summer weather in Rennell Island
Proving true to its tropical nature, the summertime on Rennell Island from December through February expresses no drastic jump in temperature or climate data. The marginally highest rainfall of the year is seen in these months, from 246mm (9.69") to 300mm (11.81"), on an average of 17 to 19 days of rainfall. In terms of temperature, averages sail from 23°C (73.4°F) in the early mornings to a daytime high of 30°C (86°F) to 31°C (87.8°F). The UV index spikes up to its yearly high of 12, accentuating the tropical intensity of the season.Autumn weather in Rennell Island
March leading up to May signifies autumn on Rennell Island, manifesting a softer landing in terms of temperature and rainfall. An average temperature range from 23°C (73.4°F) to 30°C (86°F) persists while the rainfall depth teeters between 166mm (6.54") to 272mm (10.71"). Daylight sits in the realm of 11.5 hours to 11.9 hours per day, while the sunshine duration mildly reduces to 6 hours a day.Winter weather in Rennell Island
The winter months, spanning from June to August, provide a slightly more tempered climate on Rennell Island. Temperature averages may go from a cool morning of 22°C (71.6°F) to a warm day of 28°C (82.4°F) to 30°C (86°F). Rainfall hovers in the lower range of the annual figures, from 166mm (6.54") to 207mm (8.15") which falls over an average of 15 to 16 rainy days. Prolonged daylight between 11.5 hours and 12 hours, coupled with 6 to 7 hours of sunshine, characterize the winter illumination.Weather in January
Rennell Island's weather in January is characterized by a high level of humidity due to the substantial amount of rainfall, which totals to 294mm (11.57"). It's worth noting that the overall climate is quite balmy, with steady tropical temperatures, encouraging flourishing flora on the island. Weather in January »Weather in February
In February, the weather on Rennell Island remains consistent with that of January, aiding the continuous growth of the local vegetation and wildlife. The island experiences another month of high rainfall, albeit slightly increased to 300mm (11.81"). Weather in February »Weather in March
The weather in March holds slight changes as the season proceeds. Despite the reduction in daylight hours, to about 12.2 hours, the warmth and high humidity continue unabated. With a slight increase to 330mm (12.99") of rainfall, March registers the greatest rainfall, setting a distinct pattern for the island's climate. Weather in March »Weather in April
The transition into April brings minimal changes in the overall weather on Rennell Island, preserving the tropical allure. Although there's a clear reduction of rainfall to 272mm (10.71"), the climate still sustains high humidity. Weather in April »Weather in May
Changes in Rennell Island's climate become more noticeable in May. Although a significant decrease in rainfall to 212mm (8.35") appears, the island sustains its humid ambiance. The lingering warmth of the sea continues to invite exploration of the surrounding marine life. Weather in May »Weather in June
June introduces the winter season with the least amount of rainfall for the year, at 166mm (6.54"), marking a slightly drier period on Rennell Island. However, the weather remains consistently warm. The sea temperature sees a slight decrease, but its warmth can still be appreciated by water enthusiasts. Weather in June »Weather in July
July's weather on Rennell Island stays aligned with that of June, maintaining the persistently warm conditions of the locale. Interestingly, rainfall rises slightly to 207mm (8.15"), countering the general global July summer stereotype. Weather in July »Weather in August
In August, Rennell Island's weather starts a transition back to the rainier patterns with measurable rainfall of 192mm (7.56"). Yet, the reduced rainfall compared to July hints at the island's varied climate behavior. The sea keeps up its inviting warmth, encouraging continued water sports and activities. Weather in August »Weather in September
September weather on Rennell Island presents a mixed bag of conditions. Matching August rainfall, with 176mm (6.93"), the weather remains pleasantly humid and warm. Stable sea temperatures continue to facilitate water-based recreational activities. Weather in September »Weather in October
The weather in October on Rennell Island witnesses a slight increase in rainfall to 180mm (7.09"), marking the onset of a rainier period. The island’s climate retains constant humidity, resulting in flourishing vegetation. The sea maintains its inviting temperatures, despite a slightly shorter sunlight duration. Weather in October »Weather in November
November brings about a slight increase in rainfall to 189mm (7.44") on Rennell Island, enhancing the humidity levels. As the sea temperatures continue to be agreeably warm, marine activities stay attractive for enthusiasts and tourists. Weather in November »Weather in December
Concluding the year in December, the Rennell Island weather aligns with the November pattern, with rainfall increasing to 246mm (9.69") thereby continuing the humid conditions. The consistent sea temperature keeps providing pristine conditions for various underwater activities. Weather in December »Updated: Aug 18, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Rennell Island experiences peak temperatures, averaging a high-temperature of 31°C (87.8°F) during January, February, October and November.
Throughout the year, there are 196 rainfall days, and 2764mm (108.82") of precipitation is accumulated.
The months with the warmest seawater are January and February, with an average sea temperature of 30°C (86°F).
The months with the least sunshine are January through July, September and December, with an average of 6h of sunshine.
January through April, September through December, with an average maximum UV index of 12, are months with the highest UV index.
The month with the most rainfall is March, when the rain falls for 20 days and typically aggregates up to 330mm (12.99") of precipitation.
June is the month with the least rainfall. Rain falls for 15 days and accumulates 166mm (6.54") of precipitation.
June through October, with an average sea temperature of 28°C (82.4°F), are months with the coldest seawater.
With an average of 11h and 30min of daylight, June has the shortest days of the year.
The months with the lowest UV index are June and July, with an average maximum UV index of 9.
In Rennell Island, July records the average lowest temperatures, peaking at 29°C (84.2°F) and reaching a low of 22°C (71.6°F).
August, October and November, with an average of 7h of sunshine, are months with the most sunshine in Rennell Island.
The month with the longest days is December, with an average of 12h and 48min of daylight.
Rennell Island does not observe Daylight Saving Time (DST). +11 timezone is used over the entire year.
Average temperature
Rennell Island, Solomon Islands
The warmest months (with the highest average high temperature) are January, February, October and November (31°C).
The month with the lowest average high temperature is July (29°C).
The months with the highest average low temperature are January, February, March, April, May, October, November and December (23°C).
The coldest months (with the lowest average low temperature) are June, July, August and September (22°C).
Average rainfall
Rennell Island, Solomon Islands
- Average rainfall in January:
294mm - Average rainfall in February:
300mm - Average rainfall in March:
330mm - Average rainfall in April:
272mm - Average rainfall in May:
212mm - Average rainfall in June:
166mm
- Average rainfall in July:
207mm - Average rainfall in August:
192mm - Average rainfall in September:
176mm - Average rainfall in October:
180mm - Average rainfall in November:
189mm - Average rainfall in December:
246mm
The wettest month (with the highest rainfall) is March (330mm).
The driest month (with the least rainfall) is June (166mm).
Average rainfall days
Rennell Island, Solomon Islands
- Average rainfall days in January:
19 days - Average rainfall days in February:
19 days - Average rainfall days in March:
20 days - Average rainfall days in April:
17 days - Average rainfall days in May:
16 days - Average rainfall days in June:
15 days
- Average rainfall days in July:
16 days - Average rainfall days in August:
14 days - Average rainfall days in September:
14 days - Average rainfall days in October:
15 days - Average rainfall days in November:
14 days - Average rainfall days in December:
17 days
The month with the highest number of rainy days is March (20 days).
The months with the least rainy days are August, September and November (14 days).
Average sea temperature
Rennell Island, Solomon Islands
The best months for swimming (with the highest average sea temperature) are January and February (30°C).
The coldest months (with the lowest average sea temperature) are June, July, August, September and October (28°C).
Average daylight / Average sunshine
Rennell Island, Solomon Islands
- Average daylight in January:
12h and 42min - Average daylight in February:
12h and 30min - Average daylight in March:
12h and 12min - Average daylight in April:
11h and 48min - Average daylight in May:
11h and 36min - Average daylight in June:
11h and 30min
- Average daylight in July:
11h and 30min - Average daylight in August:
11h and 42min - Average daylight in September:
12h and 0min - Average daylight in October:
12h and 24min - Average daylight in November:
12h and 36min - Average daylight in December:
12h and 48min
The month with the longest days is December (Average daylight: 12h and 48min).
The month with the shortest days is June (Average daylight: 11h and 30min).
The months with the most sunshine are August, October and November (Average sunshine: 7h).
The months with the least sunshine are January, February, March, April, May, June, July, September and December (Average sunshine: 6h).
Average UV index
Rennell Island, Solomon Islands
The months with the highest UV index are January, February, March, April, September, October, November and December (UV index 12).
The months with the lowest UV index are June and July (UV index 9).
