Full Climate overview Jan Feb Mar AprMayJun Jul Aug Sep Oct Nov Dec

Oamaru Weather in May

Oamaru in May averages 13°C (55°F) during the day and 7°C (45°F) at night. Some rainfall is typical for this time of year.

Rainfall in Oamaru in May

You can expect rain on roughly 9 days based on historical data, averaging 57 mm (2.2 in) for the month. Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.

Temperature in Oamaru in May

May in Oamaru brings moderate temperatures, with highs of 13°C (55°F) and nights around 7°C (45°F). The difference between afternoon and evening temperatures is usually noticeable. At 7°C (45°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.

For Oamaru itself, January and February generally stand out with 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.

Oamaru Temperature in May

Min Temperature

7°C (45°F)

Max Temperature

13°C (55°F)

Chance of Rain

29%

Precipitation

57 mm (2.2 in)

Rainy days

9 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

47-year average (1976-2025)

Based on our historical records, temperatures in Oamaru typically stay consistent throughout May, with daily highs averaging around 13°C (55°F). Nights are cold, with lows typically ranging from 6°C (43°F) to 8°C (46°F).

Average temperatures in May

Historical weather records for Oamaru in May

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 May

Based on 20 years of weather observations in Oamaru between 2006 and 2026, these are the recorded extremes.

The hottest May day on record in Oamaru reached 31°C (88°F) (May 7, 2019).
On May 28, 2013, Oamaru saw its coldest May day with temperatures maxing out at 6°C (43°F).
The coldest night in May in Oamaru was on May 26, 2021, with a minimum of -2°C (28°F).

Best Places in New Zealand in May

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 May →

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 May: blue is cold, red is hot.

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

What to Wear in Oamaru in May

The weather can be unpredictable in May, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. Rain is likely on several days, so bring a good rain jacket.