Here's what you can expect with tomorrow's Hornsby weather

As autumn sets in what can locals expect tomorrow? We have the latest word from the Weather Bureau.

Weather forecasts are updated on the hour, sourced from WeatherZone.

Tomorrow's forecast is mostly cloudy; rain periods; se/sw winds.

The highest expected temperature tomorrow is 21, which is three degrees lower than today's max.

Today's maximum is the highest the mercury will climb over the next seven days, according to the forecast.

The chance of rain tomorrow is 90 per cent.

Showers are less likely Monday when the Bureau of Meteorology forecasts a medium (60 per cent) chance of rain.

The UV index is predicted to be 5. There is a moderate risk of harm from sun exposure. Experts suggest covering up, using sunscreen outside and avoiding the sun around noon.

Winds will be south around 7 km/h in the morning shifting to south-southwest around 12 km/h in the afternoon.

Details for the next six days:

Sunday, April 27: Mostly cloudy. Rain periods. SE/SW winds Min - 16. Max - 21.

Monday, April 28: Partly cloudy. Possible shower. SW winds Min - 15. Max - 22.

Tuesday, April 29: Morning fog patches. Late shower. W'ly winds tending SE Min - 14. Max - 24.

Wednesday, April 30: Mostly cloudy. Rain periods. Fresh SW winds Min - 14. Max - 20.

Thursday, May 1: Mostly cloudy. Showers. SW winds Min - 11. Max - 19.

Friday, May 2: Mostly cloudy. Showers. SW/SE winds Min - 12. Max - 21.

The previous Hornsby weather article can be viewed here.