Climate of Guanacaste, Costa Rica
Area-weighted average across Guanacaste. For where people actually live and travel, see the cities below.
Guanacaste, a subdivision of Costa Rica, has a tropical climate on average. Area-weighted monthly temperatures across the whole territory range from 25°C / 77°F in November to 27.4°C / 81.3°F in April, with rainfall from 14 mm / 0.6 in to 367 mm / 14.4 in depending on the season (2020 mm / 79.5 in total across the year). See the city listed below for point-value climate at specific locations — these often differ from the area-weighted average, especially in geographically diverse subdivisions.
| Month | Temperature | Rainfall | Matches |
|---|---|---|---|
| January | 25.3°C77.5°F | 28 mm1.1″ | Sunny & Hot, Sunny & Warm |
| February | 26°C78.8°F | 15 mm0.6″ | Sunny & Hot, Sunny & Warm |
| March | 26.9°C80.4°F | 14 mm0.6″ | Sunny & Hot |
| April | 27.4°C81.3°F | 46 mm1.8″ | — |
| May | 26.7°C80.1°F | 232 mm9.1″ | Tropical |
| June | 25.9°C78.6°F | 312 mm12.3″ | Tropical |
| July | 25.9°C78.6°F | 196 mm7.7″ | Tropical |
| August | 25.7°C78.3°F | 251 mm9.9″ | Tropical |
| September | 25.4°C77.7°F | 367 mm14.4″ | Tropical |
| October | 25.1°C77.2°F | 361 mm14.2″ | Tropical |
| November | 25°C77°F | 147 mm5.8″ | Tropical |
| December | 25°C77°F | 51 mm2″ | — |
Frequently asked questions
What is the best time to visit Guanacaste?
The best months to visit Guanacaste, Costa Rica for sunny, dry weather are January, February, March. The warmest month is April at an area-wide average of 27.4°C / 81.3°F, and the driest is March with about 14 mm / 0.6 in of rainfall.
What is the climate of Guanacaste?
Guanacaste, Costa Rica has area-weighted monthly average temperatures ranging from 25°C / 77°F in November to 27.4°C / 81.3°F in April. Annual rainfall averages about 2020 mm / 79.5 in, with the wettest month being September (367 mm / 14.4 in) and the driest March (14 mm / 0.6 in). Because this is an area average across the whole subdivision, local city values can differ substantially.
What is the hottest month in Guanacaste?
The hottest month in Guanacaste is April, with an area-wide average temperature of 27.4°C / 81.3°F.
What is the coldest month in Guanacaste?
The coldest month in Guanacaste is November, with an area-wide average temperature of 25°C / 77°F.
When does it rain most in Guanacaste?
The wettest month in Guanacaste is September, averaging about 367 mm / 14.4 in of rainfall. The driest is March with about 14 mm / 0.6 in.