The highest expected temperature tomorrow is 26, which is four degrees lower than today's max.

Warmer conditions are expected on three of the next six days, with the mercury climbing above today's maximum on Thursday, Friday and Sunday.

The chance of rain tomorrow is 5 per cent.

There is a similar chance of showers Wednesday when the Bureau of Meteorology forecasts a slim (5 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 southwest around 13 km/h in the morning shifting to south-southeast around 16 km/h in the afternoon.

Details for the next six days:

Tuesday, December 24: Sunny. SW/SE winds Min - 15. Max - 26.

Wednesday, December 25: Sunny. W'ly winds tending E'ly Min - 16. Max - 29.

Thursday, December 26: Sunny. NW winds tending fresh NE Min - 17. Max - 33.

Friday, December 27: Partly cloudy. Late shower. Fresh N'ly winds tending S'ly Min - 21. Max - 37.

Saturday, December 28: Mostly sunny. SW winds tending E'ly Min - 19. Max - 29.

Sunday, December 29: Mostly sunny. SW winds tending E'ly Min - 18. Max - 32.

The previous Parramatta weather article can be viewed here.