Climate Insights for Guácimo

The climate in Guácimo is warm and mild. The average annual temperature is 24°C and approximately 3031mm of precipitation falls per year. Guácimo receives a notable amount of rainfall throughout the year, including during its driest month. Guácimo is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: September, June, May. The coldest months are January, February, March, when temperatures can drop to 20°C.

Guácimo has relatively stable temperatures year-round, staying within a 10°C range. The warmest month is September, when average highs reach 30°C and the mean temperature sits around 25°C. January is the coolest month, with minimum temperatures around 20°C and an average of 23°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows.

Guácimo is a very wet location, receiving approximately 3031mm of precipitation annually, which averages out to around 253mm per month. The wettest month is October, averaging 421mm of rainfall. November and May also tend to see above-average precipitation. The driest month is March, with just 87mm. That's 333mm less than October, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

Guácimo is relatively calm, with an average annual wind speed of 1km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

It is currently summer in Guácimo, which began on June 21, 2026. Guácimo is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in September at around 30°C, while the coldest stretch bottoms out in January near 20°C. Autumn is next, beginning on September 23, 2026 — 93 days from now.

The best time to visit Guácimo is during March, when the weather is most comfortable for travellers. During these months, average temperatures hover around 24°C with modest rainfall averaging 87mm per month. By contrast, September can be uncomfortably hot with highs reaching 30°C, while January is the coldest period with lows dropping to 20°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Guácimo based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.