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Compare Costa Rica weather in February, from dry and sunny Tamarindo to wetter Puerto Viejo, plus Jacó, Arenal and San José.
Atenas Weather in October
October in Atenas brings high temperatures around 26°C (79°F) during the day, dropping to 19°C (66°F) at night, with the most rainfall of the year.
Rainfall in Atenas in October
Atenas is in the rainy season in October, with rain on around 22 days and an average of 497 mm (20 in). Rainy season showers here are typically intense, often clearing quickly but coming down hard while they last.
Temperature in Atenas in October
In October, Atenas gets high temperatures, with highs of 26°C (79°F). Nights cool to around 19°C (66°F). This kind of day-to-night contrast is typical for this time of year. Nights cool down to 19°C (66°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Atenas in October
You can expect a moderate amount of sunlight, with approximately 161 hours. Even though this month is part of the wet season, you can still see the sun occasionally.Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, February and March typically offer the best weather for Atenas.
Atenas Temperature in October
Min Temperature
19°C (66°F)
Max Temperature
26°C (79°F)
Chance of Rain
74%
Precipitation
497 mm (20 in)
Rainy days
22 days
Humidity
88% *
Sunshine
161 hours *
Percentage Sunshine
*
* Data from: Santamaria, Costa Rica (25 KM, 15 Miles).
Atenas Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Atenas - and find the best time to visit.
Daily Historical Temperatures
46-year average (1976-2025)
Based on our historical records, temperatures in Atenas typically stay consistent throughout October, with daily highs averaging around 26°C (79°F). Nights are pleasant, with lows around 19°C (66°F).
Average temperatures in October
Daily Historical Precipitation
46-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in October
Historical weather records for Atenas in October
Browse day-by-day weather records for Atenas spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Atenas historical weather extremes in October
Based on 31 years of weather observations (1994-2025), these are the most extreme conditions recorded in Atenas.
- On October 20, 2017, temperatures climbed to 33°C (91°F), marking the warmest October day on record.
- Atenas experienced its chilliest October day on October 16, 2011, reaching only 20°C (68°F).
- Atenas registered its coldest October night on October 7, 2018, with temperatures dropping to 16°C (61°F).
- Peak precipitation in October occurred on October 5, 2017, when 160 mm (6.3 in) of precipitation was measured.
Best Places in Costa Rica in October
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 October →
perfect weather
pleasant
tolerable
unpleasant
poor
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 Atenas in October
Warm but pleasant conditions in Atenas in October. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. Sunglasses could come in handy during the sunnier parts of your trip.
What To Do in Atenas in October
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Atenas 3-Day Forecast
More climate data for Atenas
Temperature Rainfall Sunshine Humidity
See the full Atenas climate overview or explore weather in Costa Rica.
Popular in October
Where to go in October - average daytime high across popular destinations.
Tamarindo
30°C (86°F) Santa Teresa28°C (82°F) Cahuita29°C (84°F) Fortuna28°C (82°F) Puerto Viejo de Talamanca29°C (84°F) Herradura28°C (82°F) Jacó28°C (82°F) San José24°C (75°F) Bucket list
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