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Costa RicaThe weather in August in Guanacaste
It's hot in August in Guanacaste with an average temperature of 33°C. Temperatures this month range from a low of 31°C to a high of 34°C. At night, you can expect temperatures between 23°C and 24°C.
Looking for sun? August isn’t a good month to be in Guanacaste. The temperature is nice, but there’s too much chance of rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in August for Guanacaste, Costa Rica. 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 37°C in 2014, Guanacaste reached the highest temperature in August over the past 10 years. The lowest daytime temperature in this month was 26°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of 20°C to a highest value of 27°C.
Rainfall amount
In August, there is an average of 252 mm of precipitation, spread over 19 days. The wind speed is around 4 Bft, mostly coming from the Southeast.
Daily weather in August for Guanacaste
Click on any day in August to get detailed info about the usual weather on that day in Guanacaste. Check out the historical temperatures and precipitation over the past 10 years on this day.
August weather comparison
| Guanacaste | New York | |
|---|---|---|
| Average temperature | 33°C | 30°C |
| Max. temperature | 34°C | 31°C |
| Min. temperature | 23°C | -5°C |
| Total precipitation | 252 mm | 79 mm |
| Rainy days | 19 days | 13 days |
Start of August
The month of August starts in Guanacaste with hot temps, averaging around 33°C during the day and nights around 24°C.
Mid August
By mid-August, daytime temps stay steady at around 33°C, with nights around 24°C. There’s a high chance of precipitation during this time.
End of August
By the end of August, the average daytime temperature in Guanacaste is around 32°C, while nighttime temps are about 23°C. There’s a significant chance of many days with precipitation.
Find affordable vacations to Guanacaste
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
The hurricane season in Guanacaste runs from June to November.
Check out the climate of Guanacaste for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in August in Guanacaste, Costa Rica. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in August in Guanacaste
Temperature in August in Guanacaste over the years
Precipitation charts
These charts show the average amount of precipitation in August in Guanacaste, Costa Rica. 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 August in Guanacaste
Total precipitation in August in Guanacaste over the years
Daily UV index in August in Guanacaste
This chart shows the average daily UV index in August in Guanacaste, 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 August in Guanacaste
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Average weather in Guanacaste by month
Click on a month below to see detailed weather info for Guanacaste. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.