Climate averages 1991–2020
Blue Mountains weather
in August.
A cool, moderately wet month: the 10th warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a cool month in Blue Mountains: daytime highs average 11.5°C and nights cool to about 1.8°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 46 mm of rain on roughly 7 days, which makes August a moderately wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 52 min on an average August day.
The nearest other city in this atlas is Sydney (83 km away). In August its highs average 17.1°C, 5.7°C warmer than Blue Mountains, with 53 mm of rain.
Among the 32 cities listed in Australia, Blue Mountains ranks 29th of 32 for the warmest August highs and 15th of 32 for the driest August (rainfall, lowest first). The mean August high of those 32 cities is 17.6°C; Blue Mountains is 6.2°C cooler than that mean.
From August to September, average highs rise by 3.6°C to 15.0°C, and monthly rainfall rises from 46 mm to 53 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Blue Mountains climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 23.6°C12.8°C | 12.8°C | 126 | 15.5 | 14.114 h |
| February | 22.2°C12.6°C | 12.6°C | 148 | 15.4 | 13.313 h |
| March | 19.9°C10.8°C | 10.8°C | 115 | 15.1 | 12.312 h |
| April | 16.8°C7.7°C | 7.7°C | 56 | 9.1 | 11.311 h |
| May | 13.3°C4.6°C | 4.6°C | 48 | 6.6 | 10.410 h |
| June | 10.4°C2.7°C | 2.7°C | 62 | 7.7 | 10.010 h |
| July | 9.9°C1.5°C | 1.5°C | 37 | 6.3 | 10.110 h |
| August, selected | 11.5°C1.8°C | 1.8°C | 46 | 6.7 | 10.911 h |
| September | 15.0°C4.3°C | 4.3°C | 53 | 8.3 | 11.912 h |
| October | 18.0°C6.6°C | 6.6°C | 75 | 10.5 | 12.913 h |
| November | 20.1°C8.9°C | 8.9°C | 109 | 13.7 | 13.814 h |
| December | 22.1°C11.0°C | 11.0°C | 121 | 13.5 | 14.314 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Sydney in AugustAustralia · 83 kmHigh 17.1°C · Low 9.4°C · 53 mm rain
- Wollongong in AugustAustralia · 95 kmHigh 16.6°C · Low 10.7°C · 63 mm rain
- Central Coast in AugustAustralia · 101 kmHigh 17.3°C · Low 10.9°C · 49 mm rain
- Maitland in AugustAustralia · 158 kmHigh 18.2°C · Low 8.4°C · 31 mm rain
- Newcastle, Australia in AugustAustralia · 160 kmHigh 17.4°C · Low 10.8°C · 56 mm rain
- Canberra in AugustAustralia · 206 kmHigh 11.4°C · Low 1.6°C · 49 mm rain
- Tuggeranong in AugustAustralia · 222 kmHigh 11.4°C · Low 1.6°C · 57 mm rain
- Coffs Harbour in AugustAustralia · 462 kmHigh 19.0°C · Low 11.7°C · 45 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Blue Mountains) is explained once on the Blue Mountains year overview and on the Sources, method and limits page.