"It will be partly cloudy with a daytime high of 20C, a pretty pleasant day.
"As the day goes on the winds should pick up, especially towards evening, and you could see a few showers and rain developing."
Fernandes said rain would return on Wednesday, particularly in the morning.
"It will be even warmer though, with a high of 21C."
Temperatures took a dip on Thursday and Friday, Fernandes said.
"We are expecting rain and a high of 18C on Thursday, and more of the same on Friday, with a high of 17C.
"Warm and wet is the main theme, with things cooling down towards the end of the week.
Overnight temperatures would remain "well into the double digits" through the week.
As for the weekend, Fernandes said showers should clear out on Saturday, with Sunday being quite clear.
"Temperatures will drop, with maximums somewhere around the mid-teens.
"It will probably be cooler but sunnier over the weekend."