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Oamaru Weather in January

January in Oamaru brings moderate temperatures, with daytime highs of 18°C (64°F) and nights around 12°C (54°F). Quite a bit of rainfall is expected, around 91 mm (3.6 in), so pack an umbrella.

Rainfall in Oamaru in January

The climate data from previous years indicates about 10 days of rain, averaging 91 mm (3.6 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Oamaru in January

January in Oamaru sees highs of 18°C (64°F) and lows of 12°C (54°F) overnight. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights drop to around 12°C (54°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 favor pleasant temperatures and minimal rainfall, January is one of the best months to visit Oamaru.

Oamaru Temperature in January

Min Temperature

12°C (54°F)

Max Temperature

18°C (64°F)

Chance of Rain

33%

Precipitation

91 mm (3.6 in)

Rainy days

10 days

Oamaru Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Oamaru - and find the best time to visit.

January

18°C (64°F)View January → February

18°C (64°F)View February → March

17°C (63°F)View March → April

15°C (59°F)View April → May

13°C (55°F)View May → June

11°C (52°F)View June → July

10°C (50°F)View July → August

11°C (52°F)View August → September

13°C (55°F)View September → This monthOctober

14°C (57°F)View October → November

15°C (59°F)View November → December

17°C (63°F)View December →

Best Time to Visit Oamaru →

Daily Historical Temperatures

48-year average (1976-2026)

Based on our historical records, temperatures in Oamaru typically stay consistent throughout January, with daily highs averaging around 18°C (64°F). Nights are cool, with lows around 12°C (54°F).

Average temperatures in January

Historical weather records for Oamaru in January

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 January

Our historical data for Oamaru spans 2006 to 2025, revealing these weather extremes.

On January 26, 2021, temperatures climbed to 32°C (90°F), marking the warmest January day on record.
Oamaru experienced its chilliest January day on January 20, 2011, reaching only 12°C (54°F).
The lowest overnight temperature recorded in January was 5°C (41°F) (January 24, 2024).
The heaviest January precipitation occurred on January 13, 2012, when 47 mm (1.9 in) of precipitation fell.

Best Places in New Zealand in January

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 January →

Conditions Temperatures Precipitation

Temperatures Precipitation

perfect weather

pleasant

tolerable

unpleasant

poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Marker color shows the average daytime high temperature in January: blue is cold, red is hot.

Marker color shows total monthly precipitation in January: pale blue is dry, deep blue is wet.

What to Wear in Oamaru in January

Comfortable temperatures call for an easy wardrobe in January. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags.