About Riverton, Southland's Climate & Weather History

With a population of around 1,700, Riverton sits in Southland, New Zealand. The city operates in the New Zealand time zone.

In 2025, Riverton recorded an average annual temperature of 51°F. The hottest temperatures reached 81°F in February; the coolest were 29°F in June. Total precipitation for the year was 61 inches, with the wettest month being September. Snowfall for the year totaled approximately 3 inches.