Climate averages 1991–2020
Adelaide Hills weather
in December.
A warm, fairly dry month: the 3rd warmest and the 4th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Adelaide Hills: daytime highs average 23.9°C and nights cool to about 12.6°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 28 mm of rain on roughly 5 days, which makes December a fairly dry month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 27 min on an average December day.
The nearest other city in this atlas is Adelaide (10 km away). In December its highs average 25.3°C, 1.4°C warmer than Adelaide Hills, with 25 mm of rain.
Among the 32 cities listed in Australia, Adelaide Hills ranks 25th of 32 for the warmest December highs and 5th of 32 for the driest December (rainfall, lowest first). The mean December high of those 32 cities is 26.0°C; Adelaide Hills is 2.0°C cooler than that mean.
From December to January, average highs rise by 2.5°C to 26.4°C, and monthly rainfall falls from 28 mm to 21 mm.
The annual picture
December 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
Adelaide Hills climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.4°C14.3°C | 14.3°C | 21 | 3.5 | 14.214 h |
| February | 26.1°C14.5°C | 14.5°C | 19 | 2.9 | 13.413 h |
| March | 23.2°C12.8°C | 12.8°C | 18 | 3.4 | 12.312 h |
| April | 19.4°C10.7°C | 10.7°C | 33 | 5.2 | 11.211 h |
| May | 15.3°C8.5°C | 8.5°C | 44 | 8.3 | 10.310 h |
| June | 12.4°C6.5°C | 6.5°C | 51 | 9.2 | 9.810 h |
| July | 11.7°C5.7°C | 5.7°C | 56 | 10.3 | 10.010 h |
| August | 12.6°C5.9°C | 5.9°C | 56 | 10.8 | 10.811 h |
| September | 15.1°C7.2°C | 7.2°C | 55 | 9.8 | 11.812 h |
| October | 18.4°C8.8°C | 8.8°C | 36 | 6.8 | 12.913 h |
| November | 21.6°C10.9°C | 10.9°C | 34 | 5.9 | 13.914 h |
| December, selected | 23.9°C12.6°C | 12.6°C | 28 | 5.4 | 14.414 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
December in nearby cities
- Adelaide in DecemberAustralia · 10 kmHigh 25.3°C · Low 15.0°C · 25 mm rain
- Bendigo in DecemberAustralia · 543 kmHigh 25.8°C · Low 13.1°C · 43 mm rain
- Ballarat in DecemberAustralia · 547 kmHigh 22.1°C · Low 10.3°C · 52 mm rain
- Geelong in DecemberAustralia · 620 kmHigh 21.9°C · Low 12.9°C · 42 mm rain
- Melbourne in DecemberAustralia · 646 kmHigh 23.3°C · Low 12.9°C · 60 mm rain
- Canberra in DecemberAustralia · 949 kmHigh 24.3°C · Low 12.1°C · 55 mm rain
- Sydney in DecemberAustralia · 1152 kmHigh 24.2°C · Low 17.8°C · 60 mm rain
- Newcastle, Australia in DecemberAustralia · 1225 kmHigh 24.7°C · Low 18.6°C · 70 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 Adelaide Hills) is explained once on the Adelaide Hills year overview and on the Sources, method and limits page.