Newcastle Weather in September
September in Newcastle averages 21°C (70°F) during the day and 14°C (57°F) at night. The perfect conditions and moderate rainfall make it a solid month to visit.
Rainfall in Newcastle in September
Records from the past 30 years suggest around 10 days of rain, with 54 mm (2.1 in) average for the month. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.
Temperature in Newcastle in September
September in Newcastle is generally perfect, with days reaching 21°C (70°F) and nights settling around 14°C (57°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With lows of 14°C (57°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, March, April, May, September, October, November and December typically offer the best weather for Newcastle.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Australia, check out our Newcastle's climate page.
Newcastle Temperature in September
Min Temperature
14°C (57°F)
Max Temperature
21°C (70°F)
Chance of Rain
33%
Precipitation
54 mm (2.1 in)
Rainy days
10 days
Humidity
51% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Newcastle typically stay consistent throughout September, with daily highs averaging around 21°C (70°F). Nights are cool, with lows typically ranging from 10°C (50°F) to 12°C (54°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Newcastle in September
Browse day-by-day weather records for Newcastle spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Newcastle historical weather extremes in September
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Newcastle.
- Newcastle recorded its highest September temperature of 36°C (97°F) on September 30, 1980.
- Newcastle experienced its chilliest September day on September 13, 1988, reaching only 12°C (54°F).
- Newcastle registered its coldest September night on September 13, 1984, with temperatures dropping to 2°C (36°F).
Best Places in Australia in September
Find out more about the weather in Australia and which places have the best travel conditions in this month. See all of Australia in September →
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What to Wear in Newcastle in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days.What To Do in Newcastle in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Australia, check out our Newcastle's climate page.
See the full Newcastle climate overview or explore weather in Australia.
