Cromwell Temperature by Month
The average annual maximum temperature in Cromwell, Otago, New Zealand is 12°C (54°F), with daytime highs ranging from 3°C (37°F) in July to 19°C (66°F) in February. This page covers monthly averages, day-night differences, and how Cromwell compares to cities worldwide.
Cromwell Monthly Temperatures
Visitors to Cromwell will encounter a climate influenced by big temperature differences across the year. Nighttime temperatures range from 8°C (46°F) in February to -4°C (25°F) in July.
The chart below illustrates the average maximum day and minimum night temperatures in Cromwell by month:
From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. February, the warmest month, averages 201 hours of sunshine.
The chart below shows the average temperature throughout the year:
Daily Historical Temperatures
31-year average (1995-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in June
Historical Cromwell Temperatures: 1995-2026
Browse day-by-day temperature records for Cromwell spanning 32 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Cromwell 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.
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Cromwell vs World: Temperature Compared
Cromwell's average annual maximum temperature is 12°C (54°F). To put that in context, here's how it compares to a few well-known destinations:
Lisbon, Portugal averages 21°C (70°F) annually — warm summers, mild winters, and rain mainly in the cooler months.
Interlaken, Switzerland averages 8°C (46°F) a year, with cold winters and cool summers thanks to its Alpine setting.
Seoul, South Korea averages 18°C (64°F) a year, with four clear seasons, cold winters, and hot humid summers.
Melbourne, Australia averages 20°C (68°F) annually — known for unpredictable weather, with four seasons sometimes happening in one day.
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.
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 Cromwell's weather — including monthly rainfall, sunshine hours, and humidity — visit our Cromwell climate page.
