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

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.