7 day weather forecast

 Effective as of 4:00 PM Tuesday May 25 2021

Explanatory notes:

Perth has seen the coldest day this early in the year in 20 years and the coldest May day since May 30 2013 as the maximum temperature at Perth Metro yesterday was only 14.7°C.

This was due to the cold air mass over the region with frequent showers.

Becoming warmer with the high pressure system entering the Great Australian Bight/southern Australia leading to northeasterly winds.

On Friday a cold front and trough system arrives from the west bringing showers and the possibility of thunderstorms with a moist and unstable atmosphere ahead of an upper level trough.

On Saturday, the cut off low lies to the southeast, showery conditions with the possibility of thunderstorms for Perth with the moist flow ahead of the upper level trough.

Showery conditions continue on Sunday in the south-southwesterly air stream.

The rest of Tuesday May 25:

City:

Mostly clear.

Chance of any rain:0%

Amount:Nil

Perth Metropolitan Area:

Mostly clear.Light winds.

Wednesday May 26:

City:

7-20  Degrees Celsius

Partly cloudy.

Chance of any rain:0%

Amount:Nil

Perth Metropolitan Area:

Partly cloudy.High clouds.Winds northeasterly at 15-25 km/h.

Thursday May 27:

City:

10-24  Degrees Celsius

Partly cloudy.

Chance of any rain:5%

Amount:Nil

Perth Metropolitan Area:

Partly cloudy.High clouds.Winds northeasterly at 15-25 km/h becoming north-northeasterly from late morning becoming light later in the afternoon.

Friday May 28:

City:

11-23  Degrees Celsius

Showers.Possible thunderstorm.

Chance of any rain:80%

Amount:2 to 10 mm

Perth Metropolitan Area:

Partly to mostly cloudy.A high (80%) chance of showers.The chance of a thunderstorm. Winds north-northeasterly at 10-25 km/h shifting northwesterly in the afternoon.

Saturday May 29:

City:

14-20  Degrees Celsius

Showers and thunderstorms.

Chance of any rain:100%

Amount:10 to 25 mm

Perth Metropolitan Area:

Partly to mostly cloudy.A very high(100%) chance of showers.The chance of a thunderstorm.Winds northwesterly at 15-25 km/h shifting westerly during the day.

Sunday May 30:

City:

9-18  Degrees Celsius

Showers.

Chance of any rain:70%

Amount:2 to 8 mm

Perth Metropolitan Area:

Partly to mostly cloudy.A high(70%) chance of showers.Winds south-southwesterly at 20-30 km/h.

Monday May 31:

City:

9-18  Degrees Celsius

Possible shower or two.

Chance of any rain:40%

Amount:0 to 4 mm

Perth Metropolitan Area:

Partly to mostly cloudy.A medium(40%) chance of showers.Winds south-southwesterly at 15-25 km/h.

Tuesday June 1:

City:

9-20  Degrees Celsius

Possible shower.

Chance of any rain:30%

Amount:0 to 2 mm

Perth Metropolitan Area:

Partly to mostly cloudy.A slight(30%) chance of showers.Winds southerly at 15-25 km/h.

Charts:

                                   

Figure 1.Surface synoptic chart.Image courtesy of the Australian Bureau of Meteorology(BOM).

 2. 

Figure 2.Key features identified on True Colour RGB satellite image.Satellite image courtesy of the Japanese Meteorological Agency(JMA).

Figure 3.Mean Sea Level Pressure(MSLP) analysis with infrared greyscale satellite image. Image courtesy of the Australian Bureau of Meteorology(BOM)

Figure 4:Surface synoptic prognosis.Image courtesy of the Australian Bureau of Meteorology(BOM).

No liabilities held from information consumed on this site. Weather icons are from the US National Weather Service.Some information on this site is from the Australian Bureau of Meteorology (BOM).