THE good news, especially if you are heading to Sunday’s Western Derby, is that the cold front that battered Perth over the past few days is gone.

The bad news for those with outdoor plans is that there’s likely to be another one right behind it, as Perth closes in on reaching its average August rainfall inside the month’s first 10 days.

By late Saturday night the city had recorded more than 78mm of rain in the metropolitan gauge through the first four days of August, including 24.4mm from 9am Friday until 9am Saturday.

The average August rainfall is 134.6mm and Perth could be pushing that by Thursday, with up to 15mms forecast on Wednesday and up to 25mm on Thursday as a new cold front crosses the coast.

Fortunately there’s going to be some respite in between, with only a possible early shower on Sunday (0-1mm), a cloudy and likely rain-free Monday and just a shower or two on Wednesday.

But it’s hardly going to be warm, with a chilly maximum of just 16 degrees on Sunday and Wednesday the only day when the mercury will reach 20 degrees.

And if Saturday is any guide, the metropolitan area might feel even colder than that. For the vast majority of Saturday, the “apparent temperature” - taking into account factors like wind chill - was well below 10 degrees.

In fact, from 3.30am, when the actual temperature was 14.3 degrees but it felt like 10.4, the apparent temperature never reached double-figures.

At 12.31pm the difference between the actual and apparent temperatures was more than six degrees (13.0 to 6.9), while at 3.47pm it felt like it was only 5.4 degrees.

Perth’s chilly Saturday

7am - actual temperature 10.1 degrees, felt like 4.7

10.59am - actual temp 14.2, felt like 7.2

12.31pm - actual temp 13.0. felt like 6.9

2.42pm - actual temp 12.7, felt like 6.8

3.47pm - actual temp, 11.3, felt like 5.4

5pm - actual temp 10.2, felt like 5.1

7.30pm - actual temp 10.5, felt like 6.4

10pm - actual temp 9.1, felt like 5.6

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The weekly outlook

Sunday - possible early shower, 0-1mm, 16 degrees

Monday - cloudy, 0-1mm, 18 degrees

Tuesday - shower or two, 0-1mm, 19 degrees

Wednesday - rain increasing, 4-15mm, 20 degrees

Thursday - rain, possible heavy falls, 8-25mm, 17 degrees

Friday - possible morning shower, 0-0.2mm, 16 degrees

Saturday - partly cloudy, 17 degrees.