An overnight low of 9C was expected to follow, and O’Connor said overnight rain was likely.
“Cloudy and showery weather is expected throughout the week.
“Things will still be quite mild, and the daytime temperatures will stay in the mid to late teens throughout the week,” she said.
A high of 15C was forecast for Tuesday, followed by an overnight low of 9C.
“Northerlies are expected to turn to fresh westerlies in the morning, and there will be increasing cloud with the chance of a shower.”
A high of 17C is expected on Wednesday, followed by an overnight low of 8C.
The day was expected to be cloudy in the morning, but is likely to clear as westerlies turn northerly in the evening.
Thursday’s forecast is for fresh westerlies and partly cloudy skies, with a high of 17C followed by an overnight low of 10C.
Southwesterly winds will feature on Friday, which will have a showery start before clearing and becoming fine later in the day.
A high of 17C was expected followed by an overnight low of 10C.
Clear skies are expected to return on Saturday, when a fine day with westerly breezes is expected. A high of 18C is forecast, followed by an overnight low of 7C.
O’Connor said the temperatures were about average for early September in Whanganui.
Liz Wylie is a multimedia journalist for the Whanganui Chronicle. She joined the editorial team in 2014 and regularly covers stories from Whanganui and the wider region. She also writes features and profile stories.