San Gerardo Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit San Gerardo.
Climate overview of San Gerardo
San Gerardo, Alajuela, Costa Rica, enjoys a steady climate throughout the year, with daytime temperatures typically around 27°C (81°F). April is the warmest month at 29°C (84°F), while January is the coolest at 26°C (79°F).
Rainfall is high, totalling around 2486 mm (98 in) per year. October is the wettest month and March the driest. The city also experiences a distinct rainy season from May to November. March is the sunniest month, averaging 9.4 hours of sunshine per day.
San Gerardo Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in San Gerardo - and find the best time to visit.
Monthly Temperature in San Gerardo
The temperature in San Gerardo remains steady throughout the year, providing a consistently comfortable climate. Average maximum daytime temperatures range from a comfortable 29°C (84°F) in April, the warmest time of the year, to a comfortable 26°C (79°F) during cooler months like January.
At night, you can expect temperatures ranging from 20°C (68°F) in April to around 18°C (64°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in San Gerardo
San Gerardo has a relatively rainy climate with high precipitation levels, averaging 2486 mm (98 in) of rainfall annually. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, October it receives heavy rainfall, averaging 355 mm (14 in) of precipitation, recorded across 22 rainy days. In contrast, the driest month March brings less rainfall, with 42 mm (1.7 in) over 7 rainy days. For more details, please visit our San Gerardo 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 San Gerardo
Seasonal changes in sunshine hours are quite dramatic in San Gerardo. While March receives considerable daily sunshine with up to 9.4 hours, June marks the darkest time of the year, where sunshine is scarce with only 5.2 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit San Gerardo
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: January, February, March and April
- Warmest weather: March, April, May and June
- Most sunshine: March
- Fewest rainy days: February, March and April
- Seasonal pattern: A distinct rainy season from May to November
Frequently asked questions about the climate in San Gerardo
What is the best time to visit San Gerardo?
January, February, March and April typically offer the most optimal weather in San Gerardo. In contrast, May, June, August, September, October and November tend to have less optimal conditions. San Gerardo has a distinct rainy season from May to November.
What temperatures can I expect in San Gerardo?
Daytime highs range from 26°C (79°F) in January to 29°C (84°F) in April. Nighttime lows range from 18°C (64°F) to 20°C (68°F). Temperatures stay relatively stable year-round.
How much rain does San Gerardo get?
Annual rainfall is around 2486 mm (98 in). October is the wettest month with 355 mm (14 in), while March is the driest with 42 mm (1.7 in).
How sunny is San Gerardo?
San Gerardo receives around 2,489 hours of sunshine per year. March is the sunniest month with 282 hours, while June is the cloudiest with just 156 hours. Overall, San Gerardo enjoys abundant sunshine.
San Gerardo 3-Day Forecast
San Gerardo on the map
San Gerardo is highlighted - select any city to see its climate.
Popular this month
Where to go in August - average daytime high across popular destinations.
Tamarindo
31°C (88°F) Cahuita29°C (84°F) Santa Teresa29°C (84°F) Herradura28°C (82°F) Puerto Viejo de Talamanca29°C (84°F) Fortuna28°C (82°F) Jacó28°C (82°F) San José24°C (75°F) 
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Where the rain forest meets the ocean
I promise that you will not find a better location, better views, nicer rooms or lovelier staff anywhere in Costa Rica. This place really goes above and beyond.
Exploring Santa Teresa, Costa Rica: A Traveler's Guide
Immerse yourself in the laid-back charm of Santa Teresa, Costa Rica. Discover stunning beaches, vibrant dining spots, unique shops, and diverse activities in our comprehensive guide
Envision Festival
This event happens once a year in Uvita de Puntarenas and attracts people from all over the world. This festival is a must add to your bucket list.
Costa Rica Is Top Of The Happy Planet Index: Here's Why
Costa Rica has been crowned top of The Happy Planet Index — officially becoming the happiest, greenest country in the world. But what is it that makes this small but mighty Central American country so amazing?