The climate of Guanacaste

The current climate in Guanacaste features temperatures ranging from a high of 35°C to a low of 28°C throughout the year. The average yearly temperature is around 33°C. At night, temperatures in the colder months average around 20°C and in the warmer months around 23°C.

Average temperatures and precipitation

This chart shows the average monthly maximum and minimum temperatures (in degrees Celsius) and average monthly rainfall (in millimeters) for Guanacaste, Costa Rica.

Temperature records

The highest temperature recorded in Guanacaste in recent years was 58°C in January 2018. The lowest daytime temperature recorded was 23°C in September 2014.

Rainfall amount

On average, Guanacaste receives 1759 mm of precipitation each year. For comparison, New York gets 1142 mm of precipitation annually.

The hurricane season in Guanacaste runs from June to November.

Best time to visit Guanacaste?

The best time to visit Guanacaste for sunny weather is January through April, July and December. During this period, you'll have nice temperatures and not too much rain, making it a great time to visit Guanacaste. In the other months of the year, there's too much rain or the temperature isn't ideal for a visit if you want sunny and pleasant weather.

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Climate Table of Guanacaste

The climate table of Guanacaste shows the average temperatures, rainfall, and UV index per month. The table provides an overview of the average day and night temperatures in degrees Celsius, the total amount of rainfall in millimeters, the total snowfall in centimeters, and the UV index for each month. Rainfall is always measured as water, even if it's snow or hail.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Temp. max (°C)	33	34	35	35	34	32	33	33	28	31	31	33
Temp. min (°C)	22	22	23	23	24	24	24	23	20	23	22	22
Precipitation
Precipitation (mm)	10	0,2	0,6	22	206	220	106	252	362	384	185	11
UV Index	8	9	10	9	8	7	8	8	8	7	7	8

Click on the month name to see more weather details, like daily averages, temperatures, and precipitation for the past years in that month.

Temperature charts

These charts display the average temperatures in Guanacaste, Costa Rica. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.

Average Temperature per Month in Guanacaste

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Yearly Temperature in Guanacaste

Precipitation charts

These charts show the average amount of precipitation 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.

Average Precipitation per Month in Guanacaste

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Total Yearly Precipitation in Guanacaste

UV index chart

This chart shows the average UV index per month in Guanacaste, Costa Rica. The UV index indicates the intensity of ultraviolet radiation and ranges from 0 to a maximum of 11.

Average UV Index per Month in Guanacaste

Weather experiences 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.