EcuadorThe weather in September in Costa Rica
It's warm in September in Costa Rica with an average temperature of 27°C. Temperatures this month range from a low of 26°C to a high of 28°C. At night, you can expect temperatures between 19°C and 21°C.
Looking for great weather? September is a good time to be in Costa Rica. The temperatures are nice, and there’s little chance of rain this month.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Costa Rica, Ecuador. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 33°C in 2020, Costa Rica reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 22°C in 2019. The extreme nighttime temperatures ranged from a lowest recorded value of 1°C to a highest value of 24°C.
Rainfall amount
According to weather history, there is only 2,2 mm of precipitation in September. The wind speed is around 3 Bft, mostly coming from the Northwest.
Daily weather in September for Costa Rica
Click on any day in September to get detailed info about the usual weather on that day in Costa Rica. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Costa Rica | New York | |
|---|---|---|
| Average temperature | 27°C | 27°C |
| Max. temperature | 28°C | 31°C |
| Min. temperature | 19°C | -5°C |
| Total precipitation | 2,2 mm | 57 mm |
| Rainy days | 1 day | 9 days |
Start of September
The month of September starts in Costa Rica with hot temps, averaging around 28°C during the day and nights around 21°C.
Mid September
By mid-September, daytime temps drop to around 27°C, with nights around 21°C. No precipitation expected during this period, so you can enjoy plenty of sunshine.
End of September
By the end of September, the average daytime temperature in Costa Rica is around 28°C, while nighttime temps are about 21°C. No precipitation expected at the end of the month; it’ll be mostly sunny.
UV index
The UV index is a maximum of 10 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Check out the climate of Costa Rica for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in September in Costa Rica, Ecuador. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Costa Rica
Temperature in September in Costa Rica over the years
Precipitation charts
These charts show the average amount of precipitation in September in Costa Rica, Ecuador. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Costa Rica
Total precipitation in September in Costa Rica over the years
Daily UV index in September in Costa Rica
This chart shows the average daily UV index in September in Costa Rica, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in September in Costa Rica
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Average weather in Costa Rica by month
Click on a month below to see detailed weather info for Costa Rica. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.