Oamaru Weather in December
With daytime temperatures of 17°C (63°F) and nighttime lows of 11°C (52°F), December in Oamaru brings moderate temperatures during the day. It is also the wettest month of the year, so pack an umbrella.
Rainfall in Oamaru in December
During the wettest month of the year, an umbrella can be your best friend to stay dry. You can typically expect 13 days of rain this month, averaging around 92 mm (3.6 in). When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Oamaru in December
Daytime highs in Oamaru in December reach 17°C (63°F), with nights around 11°C (52°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights drop to around 11°C (52°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.If you prefer enjoying temperate temperatures and rain-free days, January and February typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit New Zealand, check out our Oamaru's climate page.
Oamaru Temperature in December
Min Temperature
11°C (52°F)
Max Temperature
17°C (63°F)
Chance of Rain
43%
Precipitation
92 mm (3.6 in)
Rainy days
13 days
Daily Historical Temperatures
46-year average (1976-2025)
Based on our historical records, temperatures in Oamaru typically stay consistent throughout December, with daily highs averaging around 17°C (63°F). Nights are cool, with lows around 11°C (52°F).
Average temperatures in December
Historical weather for Oamaru in December
Browse day-by-day weather records for Oamaru spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Oamaru historical weather extremes in December
Based on weather observations in Oamaru between 2006 and 2025, these are the recorded extremes during December.
- The warmest day in December was on December 22, 2021, with a maximum of 27°C (81°F).
- On December 1, 2016, Oamaru saw its coldest December day with temperatures maxing out at 10°C (50°F).
- The lowest overnight temperature recorded in December was 4°C (39°F) (December 20, 2025).
- The heaviest December precipitation occurred on December 28, 2010, when 36 mm (1.4 in) of precipitation fell.
Best Places in New Zealand in December
Find out more about the weather in New Zealand and which places have the best travel conditions in this month. See all of New Zealand in December →
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What to Wear in Oamaru in December
For Oamaru in December, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho.What To Do in Oamaru in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit New Zealand, check out our Oamaru's climate page.
See the full Oamaru climate overview or explore weather in New Zealand.
