Penrhyn Weather in December
December in Penrhyn brings high temperatures, with daytime highs of 29°C (84°F) and nights around 27°C (81°F). Quite a bit of rainfall is expected, around 161 mm (6.3 in), so pack an umbrella.
Rainfall in Penrhyn in December
Historically, December sees about 14 days of rain, with a monthly average of 161 mm (6.3 in). Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Penrhyn in December
Penrhyn in December gets highs of 29°C (84°F) during the day and drops to 27°C (81°F) at night. Overall, the month follows a fairly predictable daily temperature pattern. Nights are warm at 27°C (81°F), which can make sleeping uncomfortable. Keeping windows open or using a fan can help. A cold shower before bed is also a good way to cool down.
Sunshine in Penrhyn in December
The city usually sees around 161 hours of sunlight, indicating a moderately sunny period.For Penrhyn itself, September generally stands out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the Cook Islands, check out our Penrhyn's climate page.
Penrhyn Temperature in December
Min Temperature
27°C (81°F)
Max Temperature
29°C (84°F)
Chance of Rain
45%
Precipitation
161 mm (6.3 in)
Rainy days
14 days
Humidity
80%
Sunshine
161 hours
Percentage Sunshine
Daily Historical Temperatures
45-year average (1976-2025)
Based on our historical records, temperatures in Penrhyn typically stay consistent throughout December, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 26°C (79°F).
Average temperatures in December
Historical weather for Penrhyn in December
Browse day-by-day weather records for Penrhyn spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Penrhyn historical weather extremes in December
Based on 19 years of weather observations in Penrhyn between 2006 and 2025, these are the recorded extremes.
- On December 25, 2009, temperatures climbed to 34°C (93°F), marking the warmest December day on record.
- On December 10, 2022, Penrhyn saw its coldest December day with temperatures maxing out at 27°C (81°F).
- The coldest night in December in Penrhyn was on December 21, 2025, with a minimum of 20°C (68°F).
- The wettest day in December Penrhyn was on December 2, 2015 with 91 mm (3.6 in) of precipitation.
Best Places in the Cook Islands in December
Find out more about the weather in the Cook Islands and which places have the best travel conditions in this month. See all of the Cook Islands in December →
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What to Wear in Penrhyn in December
Warm weather calls for comfortable, breathable clothing in December. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Penrhyn in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the Cook Islands, check out our Penrhyn's climate page.
Temperature Rainfall Sunshine Humidity
See the full Penrhyn climate overview or explore weather in the Cook Islands.
