San Mateo del Mar Weather in December
What's the weather like in San Mateo del Mar (Oaxaca) in December 2025?
The climate in San Mateo del Mar during December can be summarized as hot and very dry.
December is in the winter in San Mateo del Mar and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a warm 30°C (87°F), whilst at night 21°C (69°F) is normal.
| Daytime temperature | 30.4°C 86.7°F |
|---|---|
| Nightly temperature | 20.8°C 69.4°F |
| Average temperature | 25.6°C 78.1°F |
| Daily sunshine | 7.7 hrs |
| Avg rainfall | 3 mm 0.1 ins |
| Rainy days | 0 days |
| Sea temperature | 27.1°C 80.8°F |
| Humidity | 62% |
| Windspeed | 16.9kph 11 mph |
On average December is the 2nd driest month of the year in San Mateo del Mar with around 3mm 0.1 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 7.7 hours of sunshine per day.
December temperatures in San Mateo del Mar
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 Mateo del Mar in December 2025.
Other monthly averages
Best places to visit in December
San Mateo del Mar weather stats
| Hottest month: | May | 34.6°C 94.3°F |
|---|---|---|
| Driest month: | January | 2mm 0.1ins |
| Sunniest month: | February | 9hrs |
| Coldest month: | January | 30°C 86°F |
| Wettest month: | June | 252mm 9.9ins |
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