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Atenas Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Atenas.
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10-day forecastForecast
Climate overview of Atenas
Atenas, in Costa Rica's Alajuela Province, maintains fairly consistent temperatures throughout the year with little seasonal variation. The area has a notably wet climate with heavy precipitation spread across the seasons, especially during the intense rainy months. People come to Atenas to enjoy what's often called Costa Rica's best climate and for its beautiful mountain setting. Let's explore the climate details to provide you with a complete overview on when to visit.
Atenas Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Atenas - and find the best time to visit.
Monthly Temperature in Atenas
With minimal seasonal shifts, Atenas experiences a constant climate year-round. Average maximum daytime temperatures range from a comfortable 29°C (84°F) in March, the warmest time of the year, to a comfortable 26°C (79°F) during cooler months like October.
At night, you can expect temperatures ranging from 20°C (68°F) in March to around 18°C (64°F) during October.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Atenas
Atenas has a notably wet climate with abundant precipitation, recording 3182 mm (125 in) of rainfall per year. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, October it receives heavy rainfall, averaging 497 mm (20 in) of precipitation, recorded across 22 rainy days. In contrast, the driest month February brings less rainfall, with 31 mm (1.2 in) over 8 rainy days. For more details, please visit our Atenas Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Atenas
Seasonal changes in sunshine hours are quite dramatic in Atenas. While January receives considerable daily sunshine with up to 9.5 hours, June marks the darkest time of the year, where sunshine is scarce with only 4.8 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Data from: Santamaria, Costa Rica (25 KM, 15 Miles).
Daily hours of sunshine
Data from: Santamaria, Costa Rica (25 KM, 15 Miles).
Humidity in Atenas by Month
The city experiences its highest humidity in October, reaching 88%. In April, the humidity drops to its lowest level at 79%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Data from: Santamaria, Costa Rica (25 KM, 15 Miles).
Best Time to Visit Atenas
For comfortable weather, consider visiting Atenas in January, February and March. Conditions are usually least favourable in May, June, July, August, September, October and November.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
excellent
Feb
excellent
Mar
excellent
Apr
very good
May
very wet
Jun
very wet
Jul
very wet
Aug
very wet
Sep
very wet
Oct
very wet
Nov
very wet
Dec
very good
- Best overall: January, February and March
- Warmest weather: February, March and April
- Most sunshine: January and March
- Fewest rainy days: February, March and April
- Seasonal pattern: Distinct dry (February to March) and wet (May to November) seasons
Frequently asked questions about the climate in Atenas
What is the best time to visit Atenas?
January, February and March typically offer the most optimal weather in Atenas. In contrast, May, June, July, August, September, October and November tend to have less optimal conditions. Atenas has distinct dry (February to March) and wet (May to November) seasons.
What temperatures can I expect in Atenas?
Daytime highs range from 26°C (79°F) in October to 29°C (84°F) in March. Nighttime lows range from 18°C (64°F) to 20°C (68°F). Temperatures stay relatively stable year-round.
How much rain does Atenas get?
Annual rainfall is around 3182 mm (125 in). October is the wettest month with 497 mm (20 in), while February is the driest with 31 mm (1.2 in).
How sunny is Atenas?
Atenas receives around 2,440 hours of sunshine per year. January is the sunniest month with 285 hours, while June is the cloudiest with just 144 hours. Overall, Atenas enjoys abundant sunshine.
Atenas 3-Day Forecast
Atenas on the map
Atenas is highlighted - select any city to see its climate.
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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