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Perth Weather

Next 48hrs in Perth

Wed 20
9:00pm
Slight chance shower15°CPossible shower
Rain: 41% (1.1mm/hr) 
Humidity: 89%
Wind:  NNW 15km/h 
Thu 21
12:00am
Rain13°CRain
Rain: 72% (0.2mm/hr) 
Humidity: 98%
Wind:  N 19km/h 
Thu 21
3:00am
Intermittent rain12°CPossible shower
Rain: 61% (0.2mm/hr) 
Humidity: 100%
Wind:  N 21km/h 
Thu 21
6:00am
Slight chance shower13°CPossible shower
Rain: 48% (0.6mm/hr) 
Humidity: 100%
Wind:  NNW 20km/h 
Thu 21
9:00am
Intermittent rain17°CPossible shower
Rain: 51% (0.2mm/hr) 
Humidity: 82%
Wind:  NW 22km/h 
Thu 21
12:00pm
Mostly clear20°CMostly clear
Rain: 20% (0.2mm/hr) 
Humidity: 66%
Wind:  WNW 24km/h 
Thu 21
3:00pm
Rain21°CRain
Rain: 71% (0.2mm/hr) 
Humidity: 60%
Wind:  WNW 25km/h 
Thu 21
6:00pm
Rain17°CRain
Rain: 90% (0.4mm/hr) 
Humidity: 78%
Wind:  W 21km/h 
Thu 21
9:00pm
Mostly cloudy15°CMostly cloudy
Rain: 34% (0.2mm/hr) 
Humidity: 87%
Wind:  W 17km/h 
Fri 22
12:00am
Mostly clear13°CMostly clear
Rain: 5% (0.0mm/hr) 
Humidity: 88%
Wind:  W 19km/h 
Fri 22
3:00am
Mostly cloudy12°CMostly cloudy
Rain: 5% (0.0mm/hr) 
Humidity: 88%
Wind:  W 18km/h 
Fri 22
6:00am
Mostly cloudy12°CMostly cloudy
Rain: 5% (0.0mm/hr) 
Humidity: 91%
Wind:  SW 16km/h 
Fri 22
9:00am
Mostly cloudy15°CMostly cloudy
Rain: 23% (0.0mm/hr) 
Humidity: 75%
Wind:  SW 11km/h 
Fri 22
12:00pm
Mostly cloudy18°CMostly cloudy
Rain: 24% (0.0mm/hr) 
Humidity: 53%
Wind:  SW 9km/h 
Fri 22
3:00pm
Mostly clear20°CMostly clear
Rain: 5% (0.0mm/hr) 
Humidity: 46%
Wind:  SW 6km/h 
Fri 22
6:00pm
Mostly clear17°CMostly clear
Rain: 5% (0.0mm/hr) 
Humidity: 58%
Wind:  S 5km/h 
What is Opticast?

Opticast is an automated forecasting system designed to produce detailed forecasts for specific times of each day. The system works by taking forecasts from a range of computer models and comparing them with past observations to produce the most accurate possible forecast possible, tailored to a specific location where weather observations are taken.

Opticast allows you to 'drill-down' into the daily forecast, giving you a more exact idea of your local conditions at particular times of interest to you. For example, if you cycle to work you are likely to be most interested in the temperature, wind and chance of rain at 6am and 9pm. Or if you're organising an afternoon party and the daily forecast is for late thunder, you'll want to know what time the bad weather is likely to arrive.

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