Fortuna Weather in December
During December, Fortuna experiences high daytime temperatures of 27°C (81°F) and cooler nights around 20°C (68°F). December sits within the rainy season, so expect regular and often heavy rainfall.
Rainfall in Fortuna in December
As part of the rainy season, Fortuna sees around 14 days of rain in December, with an average of 222 mm (8.7 in). Rainy season showers here are typically intense, often clearing quickly but coming down hard while they last.
Temperature in Fortuna in December
December in Fortuna sees highs of 27°C (81°F) and lows of 20°C (68°F) overnight. Overall, the month follows a fairly predictable daily temperature pattern. Nights drop to around 20°C (68°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Sunshine in Fortuna in December
With approximately 233 hours of sunshine, the days are filled with clear skies during the day. Rain typically falls in the afternoon or evening, keeping mornings and early parts of the day sunny.If you prefer enjoying temperate temperatures and rain-free days, February and March typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Costa Rica, check out our Fortuna's climate page.
Fortuna Temperature in December
Min Temperature
20°C (68°F)
Max Temperature
27°C (81°F)
Chance of Rain
46%
Precipitation
222 mm (8.7 in)
Rainy days
14 days
Sunshine
233 hours *
Percentage Sunshine
*
Daily Historical Temperatures
44-year average (1976-2025)
Based on our historical records, temperatures in Fortuna typically stay consistent throughout December, with daily highs averaging around 27°C (81°F). Nights are pleasant, with lows around 19°C (66°F).
Average temperatures in December
Daily Historical Precipitation
44-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Fortuna in December
Browse day-by-day weather records for Fortuna spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Fortuna historical weather extremes in December
The extremes listed below come from historical weather data collected in Fortuna from 1996 through 2025.
- The warmest day in December was on December 23, 1997, with a maximum of 34°C (93°F).
- The coldest December day was on December 11, 2017, with a maximum of 22°C (72°F).
- The lowest overnight temperature recorded in December was 13°C (55°F) (December 7, 2010).
- Peak precipitation in December occurred on December 30, 2017, when 148 mm (5.8 in) of precipitation was measured.
Best Places in Costa Rica in December
Find out more about the weather in Costa Rica and which places have the best travel conditions in this month. See all of Costa Rica in December →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Fortuna 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. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Fortuna in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Costa Rica, check out our Fortuna's climate page.
See the full Fortuna climate overview or explore weather in Costa Rica.
