Newcastle weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Excellent
Best time to visit: August – May
What is the weather like in Newcastle in December?
In December, Newcastle is warm: daytime highs average 26 °C, and nights cool down to about 18 °C. The sea averages 21.3 °C – refreshing for a swim. The sun shines for around 8 hours a day. Rain is frequent, with about 10 rainy days and 62 mm in total. All in all, December is an excellent month for a holiday in Newcastle.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 83 | 84 | 83 |
| Day | 24° | 26° | 27° |
| Night | 17° | 18° | 20° |
| Sea | 20° | 21° | 23° |
| Sun | 8 h | 8 h | 8 h |
| Rain days | 10 | 10 | 10 |
More details for December
- Daylight
- 14 h 18 min05:39 – 19:57
- UV index
- 11 · extremeclear sky, noon (estimate)All months
- Muggy days
- 9 daysdew point 18 °C or moreAll months
- Wind
- 18 km/haverage daily peakAll months
- Cloud cover
- 53 %on averageAll months
- Hot days
- 4 days30 °C or moreAll months
- Time zone
- UTC+11Australia/Sydney
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %77 %
- Few rainy daysweight 30 %61 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in December
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Rain jacket or umbrella
Newcastle in December: quick answers
Is Newcastle hot in December?
Warm rather than hot: in December, daytime highs in Newcastle average 26 °C and nights cool to about 18 °C. On about 4 days the thermometer climbs to 30 °C or more.
Can you swim in Newcastle in December?
Yes. In December the sea averages 21.3 °C – refreshing for a swim.
Does it rain much in Newcastle in December?
Rain is frequent, with about 10 rainy days and 62 mm in total.
Newcastle month by month
The whole year in NewcastleAll destinations: AustraliaWhere to go in DecemberSea temperature in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences