How do temperatures differ between Rarotonga and Penrhyn?

Temperatures in the Cook Islands are generally moderate due to the influence of trade winds. However, there is a distinct difference in mean annual temperatures between the southern and northern islands:

• Rarotonga: Located in the southern group, this island experiences mean annual temperatures in the mid-70s F (about 24 °C).1
• Penrhyn: As the northernmost island, it is warmer, with mean annual temperatures in the low 80s F (about 28 °C).1