Oamaru Weather in December

The climate in Oamaru during December can be summarized as mild and reasonably dry.

December is in the summer in Oamaru and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around 19°C (67°F), whilst at night 9°C (48°F) is normal.

On average December is the 2nd wettest month of the year in Oamaru with around 53mm 2.1 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 14 days, although this may vary considerably.

On the flip side this corresponds to an average of 6.2 hours of sunshine per day.

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Oamaru in December 2024.