San Nicolás de los Arroyos Weather in December
What's the weather like in San Nicolás de los Arroyos (Buenos Aires) in December 2025?
The climate in San Nicolás de los Arroyos during December can be summarized as warm and a little damp.
December is in the summer in San Nicolás de los Arroyos and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 30°C (85°F), whilst at night 16°C (61°F) is normal.
| Daytime temperature | 29.5°C 85°F |
|---|---|
| Nightly temperature | 16.2°C 61.1°F |
| Average temperature | 22.8°C 73°F |
| Daily sunshine | 9.9 hrs |
| Avg rainfall | 98 mm 3.9 ins |
| Rainy days | 8 days |
| Sea temperature | 19.4°C 66.9°F |
| Humidity | 66% |
| Windspeed | 11.2kph 7 mph |
On average December is the 6th wettest month of the year in San Nicolás de los Arroyos with around 98mm 3.9 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 9.9 hours of sunshine per day.
December temperatures in San Nicolás de los Arroyos
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 San Nicolás de los Arroyos in December 2025.
Other monthly averages
Best places to visit in December
San Nicolás de los Arroyos weather stats
| Hottest month: | January | 30.5°C 86.9°F |
|---|---|---|
| Driest month: | August | 42mm 1.7ins |
| Sunniest month: | November | 10hrs |
| Coldest month: | June | 15.8°C 60.4°F |
| Wettest month: | March | 144mm 5.7ins |
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