Avarua climate
Avarua (Cook Islands) has a tropical rainforest climate (Köppen Af). The average temperature over the year is 25 °C77 °F, and about 1,609 mm63 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Avarua climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 2780 | 2679 | 2679 | 1957.7 |
| Feb | 2781 | 2679 | 2780 | 2028.0 |
| Mar | 2781 | 2680 | 2780 | 1987.8 |
| Apr | 2780 | 2679 | 2679 | 1666.5 |
| May | 2678 | 2577 | 2577 | 1505.9 |
| Jun | 2576 | 2475 | 2475 | 622.5 |
| Jul | 2475 | 2373 | 2374 | 773.0 |
| Aug | 2474 | 2373 | 2373 | 632.5 |
| Sep | 2475 | 2373 | 2374 | 833.3 |
| Oct | 2476 | 2374 | 2475 | 953.7 |
| Nov | 2577 | 2476 | 2576 | 1445.7 |
| Dec | 2679 | 2577 | 2678 | 1756.9 |
| Year | 2781 | 2373 | 2577 | 1,60963 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 82% | 70% | 6.4 | 13:17 |
| Feb | 81% | 71% | 6.1 | 12:49 |
| Mar | 81% | 68% | 5.5 | 12:16 |
| Apr | 80% | 68% | 4.6 | 11:38 |
| May | 79% | 70% | 3.8 | 11:07 |
| Jun | 78% | 68% | 3.5 | 10:51 |
| Jul | 78% | 64% | 3.7 | 10:57 |
| Aug | 78% | 66% | 4.4 | 11:24 |
| Sep | 79% | 68% | 5.2 | 12:00 |
| Oct | 79% | 69% | 6.0 | 12:37 |
| Nov | 81% | 73% | 6.3 | 13:10 |
| Dec | 82% | 71% | 6.4 | 13:25 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Avarua is like
The warmest month is March, with an average high of 27 °C81 °F and a low of 26 °C80 °F. The coldest is August, when highs average 24 °C74 °F and lows 23 °C73 °F. Seasonal differences are small — just 3.7 °C6.7 °F between the warmest and the coolest month.
It is wet, with about 1,609 mm63 in of precipitation per year. The wettest three-month stretch is January–March, which brings 37% of the annual total. The wettest month is February (202 mm8.0 in), the driest is June (62 mm2.5 in).
Relative humidity ranges from 78% in August to 82% in January. The clearest skies (lowest average cloud amount, 64%) are typical of July. Average wind speed near the ground ranges from 18 km/h (11 mph) in March to 21 km/h (13 mph) in September. Daylight lasts from about 10.8 hours in June to 13.4 hours in December.
Best time to visit Avarua
Based on these averages, the most comfortable months for sightseeing and outdoor activities are June–October: average highs of 24 °C74 °F to 25 °C76 °F with 62 mm2.5 in to 95 mm3.7 in of precipitation per month.
The most challenging month is February, which is very wet (202 mm8.0 in) and humid (81% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Avarua
- Wetter months (November–May) — highs 2577 to 27 °C81 °F, lows 2476 to 26 °C80 °F, about 176 mm6.9 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
- Drier months (June–October) — highs 2474 to 25 °C76 °F, lows 2373 to 24 °C75 °F, about 76 mm3.0 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket.
How Avarua compares
Places in other countries with the most similar temperature and rainfall pattern: Nukualofa (Tonga, Af), Alofi (Niue, Af) and Toamasina (Madagascar, Am).
Nearby places
Frequently asked questions
What is the warmest month in Avarua?
March is the warmest month in Avarua, with an average high of 27 °C (81 °F) and an average low of 26 °C (80 °F).
What is the coldest month in Avarua?
August is the coldest month, with an average high of 24 °C (74 °F) and an average low of 23 °C (73 °F).
When does it rain the most in Avarua?
February is the wettest month with about 202 mm (8.0 in) of precipitation; June is the driest with about 62 mm (2.5 in).
What is the best time to visit Avarua?
Judging by long-term averages, the most comfortable months are June–October.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.