Costa Rica Weather in September
What's the weather like in Costa Rica (Estado de Mato Grosso do Sul) in September 2024?
The climate in Costa Rica during September can be summarized as warm, humid and wet.
September is in the spring in Costa Rica and is typically the 5th coldest month of the year. Daytime maximum temperatures average around a muggy 27°C (80°F), whilst at night 17°C (62°F) is normal.
| Daytime temperature | 26.8°C 80.2°F |
|---|---|
| Nightly temperature | 16.7°C 62°F |
| Average temperature | 21.7°C 71.1°F |
| Daily sunshine | 5.3 hrs |
| Avg rainfall | 121 mm 4.8 ins |
| Rainy days | 7 days |
| Sea temperature | 19.1°C 66.4°F |
| Humidity | 72% |
| Windspeed | 9.7kph 6 mph |
On average September is the 5th driest month of the year in Costa Rica with around 121mm 4.8 inches of rain making it a wet time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.3 hours of sunshine per day.
September temperatures in Costa Rica
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Costa Rica in September 2024.
Other monthly averages
Best places to visit in September
Costa Rica weather stats
| Hottest month: | February | 31°C 87.8°F |
|---|---|---|
| Driest month: | July | 61mm 2.4ins |
| Sunniest month: | April | 7.2hrs |
| Coldest month: | June | 23.1°C 73.6°F |
| Wettest month: | December | 198mm 7.8ins |
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