Thinking of visiting Penrhyn in May? Expect high temperatures reaching 30°C (86°F) during the day, dropping to 27°C (81°F) at night, and note that quite a bit of rainfall is likely.
If you prefer dry days with pleasant temperatures, May may not be the ideal month to visit Penrhyn. Our weather planner can help you explore destinations with more pleasant weather conditions.
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Pick a month to see the average temperature, rainfall and sunshine in Penrhyn - and find the best time to visit.
43-year average (1976-2025)
Based on our historical records, temperatures in Penrhyn typically stay consistent throughout May, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 27°C (81°F).
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.
The extremes listed below come from historical weather data collected in Penrhyn from 2006 through 2026.
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 May →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
Warm temperatures in May make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity
See the full Penrhyn climate overview or explore weather in the Cook Islands.
Where to go in May - average daytime high across popular destinations.
Penrhyn
30°C (86°F) Aitutaki
28°C (82°F) Arutanga28°C (82°F) Muri27°C (81°F) Avarua27°C (81°F) Arorangi27°C (81°F) Rarotonga27°C (81°F) Ngatangiia27°C (81°F) Need travel inspiration? Check out our bucket list articles and be inspired.
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