Guanica Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Guanica.
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Climate overview of Guanica
Guanica, Puerto Rico, has a stable climate with little temperature variation across the year. Average daytime temperatures hover around 29°C (84°F), peaking in July at 31°C (88°F) and dipping in February to 28°C (82°F).
With around 798 mm (31 in) of annual rainfall, the city has moderate precipitation levels. September is the wettest month and January the driest. It also has a distinct dry season from December to March.
Guanica Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Guanica - and find the best time to visit.
Monthly Temperature in Guanica
With minimal seasonal shifts, Guanica experiences a constant climate year-round. Typically, average maximum daytime temperatures range from a very warm 31°C (88°F) in July to a comfortable 28°C (82°F) in the coolest month, February.
Nights vary from 25°C (77°F) in July to around 22°C (72°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Guanica
Generally, Guanica receives mid-range precipitation levels, with 798 mm (31 in) annually. The climate in Guanica shows significant variation throughout the year. Expect high rainfall in September, the wettest month, with an average of 132 mm (5.2 in) of precipitation over 17 rainy days.
In contrast, the driest month January offers drier and sunnier days, with around 22 mm (0.9 in) of rainfall over 19 rainy days. For more details, please visit our Guanica Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Guanica
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, April, May, November and December
- Warmest weather: May, June, July, August, September, October and November
- Fewer rainy days: February, March, April, May and June
- Wettest months: August, September, October and November, when rainfall is highest.
- Seasonal pattern: A distinct dry season from December to March
Frequently asked questions about the climate in Guanica
What is the best time to visit Guanica?
January, February, March, April, May, November and December typically offer the most optimal weather in Guanica. In contrast, September and October tend to have less optimal conditions. Guanica has a distinct dry season from December to March.
What temperatures can I expect in Guanica?
Daytime highs range from 28°C (82°F) in February to 31°C (88°F) in July. Nighttime lows range from 22°C (72°F) to 25°C (77°F). Temperatures stay relatively stable year-round.
How much rain does Guanica get?
Annual rainfall is around 798 mm (31 in). September is the wettest month with 132 mm (5.2 in), while January is the driest with 22 mm (0.9 in).
Guanica 3-Day Forecast
Guanica on the map
Guanica is highlighted - select any city to see its climate.
Popular in September
Where to go in September - average daytime high across popular destinations.
San Juan
31°C (88°F) Fajardo30°C (86°F) Luquillo30°C (86°F) Aguada
30°C (86°F) Rincon30°C (86°F) Rio Grande31°C (88°F) Culebra30°C (86°F) Vieques30°C (86°F) 
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