Atenas Weather in August
August in Atenas typically sees daytime highs of 27°C (81°F) and nighttime lows of 19°C (66°F). August falls within the rainy season, so heavy rainfall is to be expected.
Rainfall in Atenas in August
Atenas is in the rainy season in August, with rain on around 23 days and an average of 420 mm (17 in). Rainy season showers here are typically intense, often clearing quickly but coming down hard while they last.
Temperature in Atenas in August
If you're visiting Atenas in August, expect highs of 27°C (81°F) and overnight lows around 19°C (66°F). This kind of day-to-night contrast is typical for this time of year. With overnight lows of 19°C (66°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Atenas in August
The area enjoys a balanced 158 hours of sunlight, ensuring it's neither too rainy nor too sunny.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.
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 Atenas's climate page.
Atenas Temperature in August
Min Temperature
19°C (66°F)
Max Temperature
27°C (81°F)
Chance of Rain
76%
Precipitation
420 mm (17 in)
Rainy days
23 days
Humidity
85% *
Sunshine
158 hours *
Percentage Sunshine
*
Daily Historical Temperatures
43-year average (1976-2025)
Based on our historical records, temperatures in Atenas typically stay consistent throughout August, with daily highs averaging around 27°C (81°F). Nights are pleasant, with lows around 19°C (66°F).
Average temperatures in August
Daily Historical Precipitation
43-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for Atenas in August
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 August
The extremes listed below come from historical weather data collected in Atenas from 1996 through 2025.
- On August 23, 2019, temperatures climbed to 32°C (90°F), marking the warmest August day on record.
- The coldest August day was on August 26, 2020, with a maximum of 22°C (72°F).
- Nighttime temperatures dropped to 14°C (57°F) on August 2, 2018, marking the coldest August night on record.
- The wettest August day on record brought 273 mm (11 in) of precipitation to Atenas (August 18, 2009).
Best Places in Costa Rica in August
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 August →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Atenas in August
Warm temperatures in August 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! Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Atenas in August
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 Atenas's climate page.
Temperature Rainfall Sunshine Humidity
See the full Atenas climate overview or explore weather in Costa Rica.
