Fernandes said the rainfall forecast for this week will be light and intermittent, with a couple of clear and sunny days expected at the end of the week.
After early-morning showers on Monday, Whanganui will be cloudy with northwesterly breezes and more of the same was expected for Tuesday when a maximum temperature of 19C is forecast.
"There is a slow front moving up from the South Island which is likely to bring some heavier rain with it late on Wednesday," said Fernandes.
"Thursday will be cloudy with northeasterly winds turning northwest during the day.
"Temperature-wise Whanganui is in for a good week with highs ranging from 17C to 20C."
The forecast for Friday predicts a high of 18C and northwesterly breezes with clear skies, and there will be more of the same on Saturday when a high of 19C is forecast.
Rain and a high of 17C with westerly winds are forecast for Sunday.
The days are now becoming noticeably longer with the sun rising about 6am and setting after 6pm.