The highest expected temperature tomorrow is 40, which is one degree higher than today's max.

Today's maximum will be topped on Saturday, but cooler conditions are expected on five of the next six days.

The chance of rain tomorrow is 60 per cent.

There is a similar chance of showers Sunday when the Bureau of Meteorology forecasts a medium (60 per cent) chance of rain.

The UV index is predicted to be 11. There is an extreme risk of harm from sun exposure. Unprotected skin can burn within minutes in today's conditions. Experts suggest looking for shade and avoiding sun exposure around noon. General advice is to take all precautions such as using eye protection, sunscreen and covering up.

Winds will be north-northwest around 16 km/h in the morning shifting to north-northwest around 22 km/h in the afternoon.

Details for the next six days:

Saturday, December 6: Mostly cloudy. Fresh NW winds Min - 23. Max - 40.

Sunday, December 7: Mostly cloudy. Possible shower. NW winds tending fresh SE Min - 20. Max - 25.

Monday, December 8: Mostly cloudy. Clearing shower. S'ly winds tending NE Min - 16. Max - 28.

Tuesday, December 9: Morning fog patches. Mostly sunny afternoon. NW winds tending E'ly Min - 18. Max - 34.

Wednesday, December 10: Mostly cloudy. Possible shower. SW/SE winds Min - 19. Max - 27.

Thursday, December 11: Cloudy. Showers, heavy at times. S'ly winds Min - 18. Max - 24.

The previous Parramatta weather article can be viewed here.