Costa RicaAverage weather for Guanacaste in December
It's hot in December in Guanacaste with an average temperature of 33°C. Temperatures this month range from a low of 32°C to a high of 34°C. At night, you can expect temperatures between 21°C and 23°C.
Start of December
The month of December starts in Guanacaste with hot temps, averaging around 33°C during the day and nights around 23°C. There’s little chance of precipitation. The weather’s mostly sunny and dry. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
Mid December
By mid-December, daytime temps stay steady at around 33°C, with nights around 22°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
End of December
By the end of December, the average daytime temperature in Guanacaste is around 33°C, while nighttime temps are about 23°C. No precipitation expected at the end of the month; it’ll be mostly sunny. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
In December, there is an average of 11 mm of precipitation, spread over 2 days. The wind speed is around 5 Bft, mostly coming from the East.
Guanacaste in December |
New York | ||
|---|---|---|---|
 Average temperature |
33°C | 9°C | |
 Max. temperature |
34°C | 12°C | |
| Min. temperature |
32°C | -5°C | |
 Total precipitation |
11 mm | 133 mm | |
| Rainy days |
2 days | 17 days | |
November
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.
Is December a good time to visit Guanacaste?
December is an awesome month to be in Guanacaste for sunny weather. You’ll have high temperatures and not much chance of rain this month.
The hurricane season in Guanacaste runs from June to November.
Temperature records
With 35°C in 2023, Guanacaste reached the highest temperature in December over the past 10 years. The lowest daytime temperature in this month was 26°C in 2023. The extreme nighttime temperatures ranged from a lowest recorded value of 17°C to a highest value of 26°C.
Check out the climate of Guanacaste for all months and discover the best travel time
Daily Temperature in December in Guanacaste
This chart shows the average daily high and low temperatures in December for Guanacaste, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in December in Guanacaste
The chart below shows the average daily precipitation in December for Guanacaste, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for December, you can expect about 2 days of precipitation in Guanacaste.
Daily UV index in December in Guanacaste
This chart shows the average daily UV index in December 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.
Temperature in December in Guanacaste over the years
This chart shows the average temperature in December in Guanacaste, measured in degrees Celsius, over the past few years.
Total precipitation in December in Guanacaste over the years
This chart shows the average precipitation in December in Guanacaste, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in December for Guanacaste
Click on any day in December 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.
Weather experiences in December in Guanacaste
Have you been to Guanacaste in December?
Share your weather experience in December in Guanacaste.
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.
Or check out the climate of Guanacaste for all months at once
