worldweatherCosta Rica weather in September - temperature, rain and is it a good time to visit?
Daytime
27°
Night
19°
☀️ Day length
12 h 11 min
Chance of rain
85%
Thunder days
66%
Humid days
100%
In September, Costa Rica averages about 27° during the day and 19° at night. Rain is fairly likely - around a 85% chance on a given day, so pack for showers.
Costa Rica weather all year - average temperatures and rain
| Month | Day | Night | Chance of rain |
|---|---|---|---|
| January | 26℃ | 19℃ | 10% |
| February | 26℃ | 18℃ | 8% |
| March | 27℃ | 19℃ | 12% |
| April | 28℃ | 20℃ | 37% |
| May | 28℃ | 20℃ | 69% |
| June | 27℃ | 20℃ | 71% |
| July | 27℃ | 20℃ | 61% |
| August | 27℃ | 19℃ | 67% |
| September | 27℃ | 19℃ | 85% |
| October | 27℃ | 19℃ | 81% |
| November | 26℃ | 19℃ | 57% |
| December | 26℃ | 19℃ | 28% |
★ - months most often recommended for travel
Where is it warmest in Costa Rica in September? Weather by city
| Place | Day | Night | Chance of rain |
|---|---|---|---|
| Cartago | 27℃ | 19℃ | 85% |
| Alajuela | 27℃ | 19℃ | 85% |
| Curridabat | 27℃ | 19℃ | 85% |
Travelling soon? Check the live 14-day weather forecast for Costa Rica.