Penrhyn Temperature by Month
The average annual maximum temperature in Penrhyn, Cook Islands is 29°C (84°F), with little variation between seasons. This page covers monthly averages, day-night differences, and how Penrhyn compares to cities worldwide.
Penrhyn Monthly Temperatures
The temperature in Penrhyn changes very little across the seasons, maintaining a similar climate throughout the year. Maximum daytime temperatures range from a comfortable 29°C (84°F) in August to a comfortable 30°C (86°F) in April. Nighttime lows range from 27°C (81°F) in April to 26°C (79°F) in August.
The chart below illustrates the average maximum day and minimum night temperatures in Penrhyn by month:
Temperatures tend to bottom out between 4 AM and 6 AM, then climb to their daily peak around 3 PM. April, the warmest month, sees 174 hours of sunshine.
The chart below shows the average temperature throughout the year:
Daily Historical Temperatures
44-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in June
Historical Penrhyn Temperatures: 1976-2026
Browse day-by-day temperature records for Penrhyn spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Penrhyn vs the Cook Islands
The map below shows the annual temperature across the Cook Islands. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
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very cold
Penrhyn vs World: Temperature Compared
Penrhyn's average annual maximum temperature is 29°C (84°F). To put that in context, here's how it compares to a few well-known destinations:
Seville, Spain averages 23°C (73°F) a year — one of the warmer cities in Western Europe, with long hot summers.
Interlaken, Switzerland averages 8°C (46°F) a year, with cold winters and cool summers thanks to its Alpine setting.
Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.
Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.
What Does the Temperature Feel Like in Penrhyn?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In Penrhyn, August is the coolest month, with average highs of 29°C (84°F) and humidity around 82% — considered very high. In April, the warmest month, temperatures average 30°C (86°F) with 84% humidity — conditions that feel very high. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Penrhyn this rarely lasts long on the ground.
For more on Penrhyn's weather — including monthly rainfall, sunshine hours, and humidity — visit our Penrhyn climate page.
