Partly cloudy,rain likely tomorrow
European, the American and the German model agree on a high near 16° in Blue Mountains today. Tomorrow looks partly cloudy around 17°, with a 73% chance of rain.
Blue Mountains, New South Wales. Below we compare what European, American, German forecast for Blue Mountains right now and flag exactly where they disagree, then break down Blue Mountains's weather month by month and which forecast model has been most accurate here.
We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in Australia before you trust any single number.
Here is Blue Mountains'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 Blue Mountains by season.
Blue Mountains runs from warm summers, with December highs near 25°C, to cold winters, when June lows sit around 2°C (a swing of about 23°C across the year). April is usually the wettest month, and Blue Mountains sees roughly 1162 mm of precipitation annually.
The most comfortable time to visit Blue Mountains is usually January, February, March and September, when daytime highs sit in the pleasant 16-26°C range and the heaviest April rain is behind you.
The CheckWeather Score blends temperature, wind and rain accuracy — each measured against ERA5 (the recorded weather) over the last 30 days across 1493 cities. Lower error means a higher score. See which forecast model is most accurate in Australia, how we measure forecast accuracy, or which model each weather app uses.
Bottom line: over the last 30 days the European model has been the most accurate forecast for Blue Mountains, scoring 91/100 on our CheckWeather Score, ahead of the American at 86. See the full AU accuracy scoreboard for exactly how every model is tested.
The models often agree on temperature and still split on rain — and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.