Newcastle weather in September
Long-run climate averages for Newcastle, New South Wales in September, plus what the forecast models say for the days ahead.
In September, Newcastle averages 22°C by day and 12°C at night. The wettest month is usually February.
September in Newcastle averages a daytime high of 22°C and an overnight low of 12°C, which reads as warm for this part of the world. Across the whole year Newcastle sees roughly 1217 mm of precipitation.
Climate averages tell you what to pack. They do not tell you what next Tuesday looks like - for that, see the live Newcastle forecast with every model compared and how much they currently agree.
Newcastle weather by month
what to expect in Newcastle through the year, 1991-2020 averagesHere is Newcastle's typical weather in each month: the average daytime high and overnight low in °C, how each month feels, and the wettest month marked. Use it to plan any trip to Newcastle by season.
Bottom line: over the last 30 days the European model has been the most accurate forecast for Newcastle, scoring 73/100 on our CheckWeather Score, ahead of the American at 66. See the full AU accuracy scoreboard for exactly how every model is tested.
Common questions
How warm is Newcastle in September?
Is September a good time to visit Newcastle?
Does it rain a lot in Newcastle in September?
Climate averages from ERA5 reanalysis. Model accuracy re-scored over a rolling 30 days. Page updated .