Newcastle Temperature by Month
The average annual maximum temperature in Newcastle, New South Wales, Australia is 22°C (72°F), with daytime highs ranging from 18°C (64°F) in July to 26°C (79°F) in January. This page covers monthly averages, day-night differences, and how Newcastle compares to cities worldwide.
Newcastle Monthly Temperatures
The moderate changes in the climate in Newcastle ensure gradual weather shifts through each season. At night, temperatures drop to between 21°C (70°F) and 12°C (54°F) depending on the time of year.
The chart below illustrates the average maximum day and minimum night temperatures in Newcastle 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
50-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in May
Historical Newcastle Temperatures: 1976-2026
Browse day-by-day temperature records for Newcastle spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Newcastle vs Australia
The map below shows the annual temperature across Australia. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Newcastle vs World: Temperature Compared
Newcastle's average annual maximum temperature is 22°C (72°F). To put that in context, here's how it compares to a few well-known destinations:
Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.
Reykjavík, Iceland averages 9°C (48°F) a year — mild summers by Icelandic standards, but cold winters and frequent wind.
Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.
Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.
What Does the Temperature Feel Like in Newcastle?
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 Newcastle, July is the coolest month, with average highs of 18°C (64°F) and humidity around 52% — considered moderate. In January, the warmest month, temperatures average 26°C (79°F) with 61% humidity — conditions that feel 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 Newcastle this rarely lasts long on the ground.
For more on Newcastle's weather — including monthly rainfall, sunshine hours, and humidity — visit our Newcastle climate page.
