The highest expected temperature tomorrow is 23, which is four degrees lower than today's max.

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

The chance of rain tomorrow is 70 per cent.

Showers are more likely on Friday when the Bureau of Meteorology forecasts a high (80 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 south-southwest around 16 km/h in the morning shifting to south-southeast around 21 km/h in the afternoon.

Details for the next six days:

Thursday, December 11: Mostly cloudy. Possible shower. Fresh SE winds Min - 18. Max - 23.

Friday, December 12: Morning fog patches. Showers, chance storm. SE/NE winds Min - 17. Max - 23.

Saturday, December 13: Morning fog patches. Late shower. N/E'ly winds Min - 16. Max - 31.

Sunday, December 14: Morning fog patches. Mostly sunny afternoon. NW winds tending NE Min - 17. Max - 34.

Monday, December 15: Partly cloudy. Clearing shower. Fresh SW/SE winds Min - 18. Max - 24.

Tuesday, December 16: Mostly cloudy. SE winds Min - 16. Max - 23.

The previous Parramatta weather article can be viewed here.