Rathmines Weather in December
What's the weather like in Rathmines (New South Wales) in December 2025?
The climate in Rathmines during December can be summarized as warm and a little damp.
December is in the summer in Rathmines and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 28°C (82°F), whilst at night 17°C (62°F) is normal.
| Daytime temperature | 27.8°C 82°F |
|---|---|
| Nightly temperature | 16.7°C 62°F |
| Average temperature | 22.2°C 72°F |
| Daily sunshine | 8.2 hrs |
| Avg rainfall | 88 mm 3.5 ins |
| Rainy days | 10 days |
| Sea temperature | 22.4°C 72.3°F |
| Humidity | 60% |
| Windspeed | 13.7kph 9 mph |
On average December is the 6th driest month of the year in Rathmines with around 88mm 3.5 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.2 hours of sunshine per day.
December temperatures in Rathmines
December rainfall
December hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Rathmines in December 2025.
Other monthly averages
Best places to visit in December
Rathmines weather stats
| Hottest month: | January | 27.7°C 81.9°F |
|---|---|---|
| Driest month: | July | 60mm 2.4ins |
| Sunniest month: | August | 7.8hrs |
| Coldest month: | July | 17.5°C 63.5°F |
| Wettest month: | February | 147mm 5.8ins |
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