Climate averages 1991–2020
Blue Mountains weather
in May.
A cool, moderately wet month: the 9th warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a cool month in Blue Mountains: daytime highs average 13.3°C and nights cool to about 4.6°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 48 mm of rain on roughly 7 days, which makes May a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 24 min on an average May day.
The nearest other city in this atlas is Sydney (83 km away). In May its highs average 18.7°C, 5.4°C warmer than Blue Mountains, with 79 mm of rain.
Among the 32 cities listed in Australia, Blue Mountains ranks 32nd of 32 for the warmest May highs and 15th of 32 for the driest May (rainfall, lowest first). The mean May high of those 32 cities is 19.5°C; Blue Mountains is 6.2°C cooler than that mean.
From May to June, average highs fall by 2.9°C to 10.4°C, and monthly rainfall rises from 48 mm to 62 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Sydney in MayAustralia · 83 kmHigh 18.7°C · Low 12.4°C · 79 mm rain
- Wollongong in MayAustralia · 95 kmHigh 18.3°C · Low 13.5°C · 97 mm rain
- Central Coast in MayAustralia · 101 kmHigh 18.8°C · Low 13.8°C · 70 mm rain
- Maitland in MayAustralia · 158 kmHigh 19.5°C · Low 11.3°C · 47 mm rain
- Newcastle, Australia in MayAustralia · 160 kmHigh 18.9°C · Low 13.8°C · 94 mm rain
- Canberra in MayAustralia · 206 kmHigh 14.3°C · Low 4.3°C · 28 mm rain
- Tuggeranong in MayAustralia · 222 kmHigh 14.2°C · Low 4.4°C · 34 mm rain
- Coffs Harbour in MayAustralia · 462 kmHigh 19.9°C · Low 14.8°C · 74 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.