Greymouth Temperature by Month
Greymouth, West Coast, New Zealand has an average annual maximum temperature of 16°C (61°F), with moderate seasonal shifts ranging from 13°C (55°F) in July to 21°C (70°F) in February. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Greymouth Monthly Temperatures
Seasonal changes in Greymouth bring a little variety without extreme temperature swings. Nighttime lows range from 13°C (55°F) in February to 5°C (41°F) in July.
The chart below illustrates the average maximum day and minimum night temperatures in Greymouth by month:
Temperatures tend to bottom out between 4 AM and 6 AM, then climb to their daily peak around 3 PM. February, the warmest month, sees 185 hours of sunshine.
The chart below shows the average temperature throughout the year:
Daily Historical Temperatures
50-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in July
Historical Greymouth Temperatures: 1976-2026
Browse day-by-day temperature records for Greymouth spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Greymouth 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.
very warm
warm
pleasant
moderate
cold
very cold
Greymouth vs World: Temperature Compared
Greymouth's average annual maximum temperature is 16°C (61°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.
San Francisco, USA averages 19°C (66°F) annually, but with little seasonal variation — summers are often cool and foggy, winters mild.
Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate — hot dry summers and mild wet winters.
What Does the Temperature Feel Like in Greymouth?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.
In Greymouth, July is the coolest month, with average highs of 13°C (55°F) and humidity around 83% — considered very high. For a full picture, see our humidity page.
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.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Greymouth this rarely lasts long on the ground.
For more on Greymouth's weather — including monthly rainfall, sunshine hours, and humidity — visit our Greymouth climate page.
