The rainy season in the Cook Islands is from November to April. The cyclone season also falls within this period.
Cook Islands Meteorological Service director Arona Ngari said the wet weather now being experienced in Rarotonga was due to a trough of pressure lying over the country.
It was slowly moving in a southeasterly direction, he said.
Ngari said showers and rain were expected until the trough cleared, which is anticipated by this Friday.
For Rarotonga, cloudy period with some showers are expected. Showers were predicted to become frequent and heavy at times from last night.
“Some occasional showers is however expected to persist,” Ngari added.
Ngari also said rough seas were associated with the trough.
Mariners are being urged to keep themselves updated with the latest weather forecast which are available on the Cook Islands Meteorological Service Facebook page.
Meanwhile Rarotonga experienced a total rainfall of 90.6 millimetres last month.
The highest daily rainfall of 44.1mm was recorded on Thursday, October 19.
The highest maximum temperature for the month (28.1 degrees Celsius) was recorded on Saturday, October 21.
The lowest minimum temperature of 18.6 degrees Celsius was recorded on October 24.
The lowest minimum temperature which is below 20 degrees Celsius lasted for two days.