Weather Forecasts, Road Conditions, and Weather Radar for SH 20 Southwestern Motorway

Current & 7-day weather forecast, road conditions, and weather radar for SH 20 Southwestern Motorway.
All times shown in your local timezone

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Weather Radar for SH 20 Southwestern Motorway

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Road Trip and Weather Conditions for SH 20 Southwestern Motorway

The SH 20 Southwestern Motorway in New Zealand is a key route connecting Auckland to the central city and beyond. The motorway is approximately 24 kilometres long, and features 4 lanes of traffic with a speed limit of 100km/h. The road surface is predominantly asphalt, and is kept in good condition with regular maintenance. The motorway is divided by a central median barrier, with a width of 3m, and features a number of on and off ramps for access to and from the motorway. The motorway is also equipped with a network of traffic cameras to help monitor traffic flow.

The SH 20 Southwestern Motorway experiences a wide range of weather conditions throughout the year. In summer (December-February) temperatures range between 10-25°C and the average rainfall is 65mm. Summer days tend to be sunny and warm, with occasional thunderstorms.

In autumn (March-May) temperatures drop to between 7-20°C and the average rainfall increases to 85mm. This season is characterized by mild days with occasional bursts of wet and windy weather.

In winter (June-August) temperatures range between 5-14°C, and the average rainfall is 110mm. This season is cold, wet and often windy, with occasional snowfall.

In spring (September-November) temperatures warm up to between 8-20°C and the average rainfall is 75mm. This season is usually dry and sunny, with occasional showers and cooler nights.

Major Junctions of SH 20 Southwestern Motorway

  • SH 16 has a major junction with SH 1 in Manukau City.
  • SH 20 has a major junction with SH 16 in Point Chevalier.

This map shows the current & 7-day weather forecast, road conditions, and weather radar for SH 20 Southwestern Motorway.