San José has a tropical climate. Rainfall is significant most months of the year, and the short dry season has little effect. According to Köppen and Geiger, this climate is classified as Am. The average temperature in San José is 20.9 °C. Precipitation here averages 2730 mm.
Climograph San José
The driest month is February, with 15 mm of rainfall. Most of the precipitation here falls in October, averaging 472 mm.
Temperature graph San José
The warmest month of the year is April, with an average temperature of 21.9 °C. December is the coldest month, with temperatures averaging 20.0 °C.
San José Climate table // historical Weather data
| Avg. Temperature (°C) | Avg. Temperature (°F) | Precipitation / Rainfall (mm) | |
|---|---|---|---|
| January | 20.2 | 68.4 | 18 |
| February | 20.6 | 69.1 | 15 |
| March | 21.3 | 70.3 | 23 |
| April | 21.9 | 71.4 | 78 |
| May | 21.6 | 70.9 | 343 |
| June | 21.2 | 70.2 | 382 |
| July | 21.1 | 70.0 | 282 |
| August | 21.1 | 70.0 | 383 |
| September | 20.8 | 69.4 | 464 |
| October | 20.5 | 68.9 | 472 |
| November | 20.3 | 68.5 | 214 |
| December | 20 | 68.0 | 56 |
| January | February | March | April | May | June | July | August | September | October | November | December | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg. Temperature (°C) | 20.2 | 20.6 | 21.3 | 21.9 | 21.6 | 21.2 | 21.1 | 21.1 | 20.8 | 20.5 | 20.3 | 20 |
| Min. Temperature (°C) | 15.1 | 15.1 | 15.7 | 16.6 | 16.6 | 16.6 | 16.8 | 16.4 | 16 | 15.9 | 15.8 | 15.2 |
| Max. Temperature (°C) | 25.3 | 26.1 | 27 | 27.3 | 26.7 | 25.8 | 25.5 | 25.8 | 25.6 | 25.1 | 24.8 | 24.9 |
| Avg. Temperature (°F) | 68.4 | 69.1 | 70.3 | 71.4 | 70.9 | 70.2 | 70.0 | 70.0 | 69.4 | 68.9 | 68.5 | 68.0 |
| Min. Temperature (°F) | 59.2 | 59.2 | 60.3 | 61.9 | 61.9 | 61.9 | 62.2 | 61.5 | 60.8 | 60.6 | 60.4 | 59.4 |
| Max. Temperature (°F) | 77.5 | 79.0 | 80.6 | 81.1 | 80.1 | 78.4 | 77.9 | 78.4 | 78.1 | 77.2 | 76.6 | 76.8 |
| Precipitation / Rainfall (mm) | 18 | 15 | 23 | 78 | 343 | 382 | 282 | 383 | 464 | 472 | 214 | 56 |
The difference in precipitation between the driest month and the wettest month is 457 mm. Throughout the year, temperatures vary by 1.9 °C.