San German Weather in December
December in San German averages 29°C (84°F) during the day and 23°C (73°F) at night. The excellent conditions and low rainfall make it a solid month to visit.
Rainfall in San German in December
Rain is expected on roughly 20 days, totalling around 29 mm (1.1 in) for the month. With rain spread across many days but low totals, showers are typically short and light rather than heavy.
Temperature in San German in December
December tends to be one of the excellent months in San German, with 29°C (84°F) in the afternoon and 23°C (73°F) overnight. This kind of day-to-night contrast is typical for this time of year. With overnight lows of 23°C (73°F), evenings and nights remain warm. Light clothing and an open window or fan can help you sleep comfortably.If your ideal day consists of dry skies and pleasant temperatures, January, February, March, April and December typically offer the best circumstances for San German.
San German Temperature in December
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San German Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in San German - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in San German typically stay consistent throughout December, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 21°C (70°F).
Average temperatures in December
Historical weather records for San German in December
Browse day-by-day weather records for San German spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
San German historical weather extremes in December
The extremes listed below come from historical weather data collected in San German from 1997 through 2025.
- The hottest December day on record in San German reached 34°C (93°F) (December 24, 2002).
- On December 22, 2023, San German saw its coldest December day with temperatures maxing out at 24°C (75°F).
- Nighttime temperatures dropped to 16°C (61°F) on December 18, 2008, marking the coldest December night on record.
Best Places in Puerto Rico in December
Find out more about the weather in Puerto Rico and which places have the best travel conditions in this month. See all of Puerto Rico in December →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in San German in December
Warm temperatures in December make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Pack a light rain jacket or compact umbrella for occasional showers.
What To Do in San German in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling8/10 -
Walking8/10 -
Camping10/10 -
Outdoor sports8/10
San German 3-Day Forecast
See the full San German climate overview or explore weather in Puerto Rico.
Popular in December
Where to go in December - average daytime high across popular destinations.
Rio Grande
28°C (82°F) San Juan29°C (84°F) Aguada
28°C (82°F) Rincon28°C (82°F) Luquillo28°C (82°F) Culebra28°C (82°F) Vieques28°C (82°F) Fajardo28°C (82°F) 
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