SeasonMapJacó weather in December
Costa Rica
December in Jacó: hot, soaked, with clean air — fine if you can take 29 rainy days.
#5 of 12 months in Jacó · #666 of 1383 destinations to visit in December · comfort 72/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Jacó in December
No notes yet. Open Jacó on the map to add the first one.
Jacó climate normals — December
| Daytime high | 28°C / 82°F | 🥵 hot |
|---|---|---|
| Nighttime low | 24°C / 75°F | |
| Feels like (high) | 33°C / 91°F | |
| Sea temperature | 29°C / 84°F | ♨️ bath-warm |
| Rainfall | 279 mm / 11 in | ⛈ soaked |
| Rainy days | 29 days | |
| Humidity | 86% | 💦 very humid |
| Dew point | 23°C / 74°F | |
| Sunshine | 9.9 h/day | |
| Daylight | 11.6 h | |
| Wind | 10 km/h / 6 mph | |
| Air quality (US AQI) | 32 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Jacó in December
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Peak crowdsDry season, Christmas and New Year, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Jacó's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherJacó's weather peaks January–March, best around February.
Best weatherFair weatherToughest weather
What's on in Jacó in December
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
Olive ridley nesting
15 Aug – 15 Dec · usuallyTurtle nestingOlive ridleys nest on Playa Hermosa from August, heaviest through September and October, and the hatchery releases at dusk. The beach is patrolled at night and you go with the project or not at all.
- Season
Dry season
15 Dec – 15 Apr · usuallyCrowdedThe rivers drop, the hills behind the town go brown and dusty, and the place runs at capacity from Christmas through to Easter. Weekends are San Jose's as much as anyone's.
- Holiday
Christmas and New Year
18 Dec – 3 JanChristmas & New YearCrowdedBook earlyCosta Rican families take the whole fortnight at the beach and rates roughly double. The town is at its loudest between Christmas and the first week of January. Source ↗
- Season
Wet season
MonsoonRisk29 rainy days and about 279 mm in the month — the real kind of rainy season, not afternoon showers.
from the climate normals
Nearby, and something's on
Within 300 km of Jacó — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Jacó?
Jacó in December — FAQ
- Is December a good time to visit Jacó?
- December in Jacó: hot, soaked, with clean air — fine if you can take 29 rainy days. It ranks #5 of 12 months for Jacó on SeasonMap's comfort score (72/100).
- What is the weather like in Jacó in December?
- In December, Jacó averages a daily high of 27.6°C and a low of 24°C, with about 278.6 mm of rain over roughly 28.5 rainy days.
- What is the air quality in Jacó in December?
- Jacó has a mean US Air Quality Index of about 32 in December.
Other months in Jacó
Compare Jacó in December
Warmer or cooler than Jacó in December
Similar destinations in Central America — December
Within 300 km: Nosara's Arribada at Ostional around 1 Jul – 31 Dec, and Boquete's Coffee harvest around 1 Oct – 28 Feb.