Fairfax Media Network

Perth 28-day Rainfall Forecast

Sun
Mon
Tue
Wed
Thu
Fri
Sat
Jul 1
2
low
3
low
4
5
6
med
7
high
8
9
10
11
12
low
13
low
14
low
15
med
16
high
17
med
18
19
20
low
21
med
22
med
23
low
24
high
25
low
26
med
27
med
28
high
Chance of rainfall within district
nil
< 25%
low
25% to 50%
med
50% to 75%
high
≥ 75%

Issue Notes

The hemispheric long wave pattern has been relatively slow moving in recent weeks. There are six main troughs. Currently the most significant troughs are near the longitudes of South Africa, the Indian Ocean, New Zealand, the south Pacific, South America, and the Atlantic Ocean.
Summary:
Over southern and eastern Australia the cold front events with potential to bring widespread rain are now expected about 15 July to 19 July, 24 July to 28 July, and 2 August to 6 August. Rain events originating in the tropics and moving south are possible about 3 August to 7 August.
Over Western Australia the strongest cold fronts should occur about 7 July to 11 July, 17 July to 21 July, and 30 July to 3 August.

Issued Jun 30

Forecast Explanation

This forecast is produced by a multi-model ensemble consisting of dynamical atmospheric models, which are forced by the latest observed atmosphere, ocean, land and ice conditions. The models are designed to simulate features of the real atmosphere, including the daily movement of long and short wave patterns in the Southern Hemisphere.

The future probability of rain in each district is estimated using output from the multi-model ensemble, combined with historical information about the difference between the model forecasts and observed rainfall.

In this deterministic framework the skill of the forecast tends to decrease with time, however the forecasts are updated daily to provide the latest estimates of rainfall probability out to 28 days.

Display Your Local Weather

Weather News

Capital City Election Day Weather Promises

14:15 EST

It's going to be a mixed bag of weather around the country on Saturday as voters head out to decide who next we can make fun of in cartoons, watch being interviewed on a brisk dawn walk, or hear them say 'jobs and growth' again and again.

Mallee students use songs to build community resilience through drought

11:15 EST

A program involving writing and recording songs is helping students deal with the effects of drought on rural communities.

Disaster funding sought for NSW village flooded three times in six years

10:35 EST

Cash grants and loans are being sought for residents in a small central New South Wales village, hit by their third flood in six years.