Temperature Rainfall Full climate overview

Oamaru Temperature by Month

The average annual maximum temperature in Oamaru, Otago, New Zealand is 14°C (57°F), with daytime highs ranging from 10°C (50°F) in July to 18°C (64°F) in February. This page covers monthly averages, day-night differences, and how Oamaru compares to cities worldwide.

Oamaru Monthly Temperatures

Oamaru sees moderate fluctuations in temperatures, making each season distinct yet not extreme. Nights are considerably cooler, with lows ranging from 12°C (54°F) in February to 4°C (39°F) in July.

The chart below illustrates the average maximum day and minimum night temperatures in Oamaru by month:

From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak.

The chart below shows the average temperature throughout the year:

Daily Historical Temperatures

Average high and low temperatures for each day of the month based on long-term records. 47-year average (1976-2025)

Average temperatures in August

Historical Oamaru Temperatures: 1976-2026

Browse day-by-day temperature records for Oamaru spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.

Temperature: Oamaru vs New Zealand

The map below shows the annual temperature across New Zealand. You can also select individual months if you want to compare a specific time of year.

Avg day temp (°C)

0° 32°

Oamaru vs World: Temperature Compared

Oamaru's average annual maximum temperature is 14°C (57°F). To put that in context, here's how it compares to a few well-known destinations:

Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.

Glasgow, Scotland averages 13°C (55°F) a year, mild but often grey, with cold winters and rarely hot summers.

Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.

Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate, hot dry summers and mild wet winters.

How are these Temperatures Measured?

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Temperature and Altitude

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

For more on Oamaru's weather, including monthly rainfall, sunshine hours, and humidity, visit our Oamaru climate page.