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Weather in Guanacaste for December 2025

Your guide to Guanacaste weather in December - trends and predictions

    Temperatures

  • Until now, December 2025 in Guanacaste has been nearly identical to the historical average, with a temperature of 28.9 °C (showing only a slight deviation of -0.2 °C).

  • The forecast for the next days in Guanacaste predicts temperatures to be around 30 °C, close to the historical average.

  • In general, the average temperature in Guanacaste at the beginning of December is 28.7 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 29.4 °C by the end of December.

    • Rain 🌧️

  • The climate of Guanacaste in December is notably wet, with an average of 11 rainy days, and a total of 93.3 mm of precipitation.

Average dry days
20
Dry days
Average rainy days
11
Rainy days
Average snowy days
0
Snow days
Average temperatures
29°/22°
Temperatures
Average wind speed
13 km/h
Avg max wind
Average humidity
79 %
Avg humidity

Guanacaste Weather December

Move between months or click on a day
November
January
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Moderate rain at times
29°
2
Moderate rain at times
29°
3
Moderate or heavy rain shower
28°
4
Patchy rain possible
28°
5
Patchy rain possible
29°
6
Patchy rain possible
29°
7
Partly cloudy
29°
8
Cloudy
29°
9
Patchy rain possible
30°
10
Moderate rain at times
30°
11
Overcast
30°
12
Patchy rain possible
30°
13
Patchy rain possible
29°
14
Overcast
29°
15
Partly cloudy
29°
16
Sunny
29°
17
Sunny
30°
18
Partly cloudy
30°
19
Sunny
30°
20
Sunny
30°
21
Sunny
30°
22
Sunny
30°
23
Sunny
30°
24
Sunny
30°
25
Sunny
30°
26
Sunny
30°
27
Sunny
30°
28
Sunny
30°
29
Moderate or heavy rain shower
29°
30
Moderate or heavy rain shower
29°
31
Patchy rain possible
28°

Temperatures trend during December in Guanacaste

See the weather trend as well as the moving average line

December weather in Guanacaste day by day

Click on a date for more information
November January
Date Weather Temperatures Rain UV More
1 Dec. Moderate rain at times
Moderate rain at times
 29° /22° 4.4 mm 6
2 Dec. Moderate rain at times
Moderate rain at times
 29° /22° 2.4 mm 6
3 Dec. Moderate or heavy rain shower
Moderate or heavy rain shower
 28° /22° 10.6 mm 6
4 Dec. Patchy rain possible
Patchy rain possible
 28° /22° 0.3 mm 6
5 Dec. Patchy rain possible
Patchy rain possible
 29° /21° 0.6 mm 6
6 Dec. Patchy rain possible
Patchy rain possible
 29° /20° 1.6 mm 6
7 Dec. Partly cloudy
Partly cloudy
 29° /21° 1.9 mm 7
8 Dec. Cloudy
Cloudy
 29° /21° 6.5 mm 7
9 Dec. Patchy rain possible
Patchy rain possible
 30° /21° 0.8 mm 7
10 Dec. Moderate rain at times
Moderate rain at times
 30° /21° 0.7 mm 7
11 Dec. Overcast
Overcast
 30° /22° 0.4 mm 7
12 Dec. Patchy rain possible
Patchy rain possible
 30° /22° 0.4 mm 7
13 Dec. Patchy rain possible
Patchy rain possible
 29° /22° 0.1 mm 6
14 Dec. Overcast
Overcast
 29° /21° 0.6 mm 7
15 Dec. Partly cloudy
Partly cloudy
 29° /22° 0.1 mm 2
16 Dec. Sunny
Sunny
 29° /22° 0 mm 2.1
17 Dec. Sunny
Sunny
 30° /22° 0 mm 2.1
18 Dec. Partly cloudy
Partly cloudy
 30° /21° 0.1 mm 2
19 Dec. Sunny
Sunny
 30° /21° 0 mm 0
20 Dec. Sunny
Sunny
 30° /22° 0 mm 7
21 Dec. Sunny
Sunny
 30° /22° 0 mm 7
22 Dec. Sunny
Sunny
 30° /22° 0 mm 7
23 Dec. Sunny
Sunny
 30° /22° 0 mm 6
24 Dec. Sunny
Sunny
 30° /22° 0 mm 7
25 Dec. Sunny
Sunny
 30° /22° 0 mm 7
26 Dec. Sunny
Sunny
 30° /21° 0 mm 6
27 Dec. Sunny
Sunny
 30° /21° 0 mm 7
28 Dec. Sunny
Sunny
 30° /22° 0 mm 6
29 Dec. Moderate or heavy rain shower
Moderate or heavy rain shower
 29° /22° 17.3 mm 6
30 Dec. Moderate or heavy rain shower
Moderate or heavy rain shower
 29° /22° 12.4 mm 6
31 Dec. Patchy rain possible
Patchy rain possible
 28° /22° 0.2 mm 6
Next
Important Notice
Our weather forecast for Guanacaste in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Guanacaste forecast closer to your planned date for the most up-to-date weather information.
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Guanacaste in December - FAQ

What are the expected maximum and minimum temperatures in Guanacaste during December?
During December, expect a variety of temperatures with highs around 29° and lows near 22°, suitable for diverse activities and preferences.
How much rainfall should be expected in Guanacaste during December?
Moderate rainfall is anticipated in Guanacaste during December, with a total of 93.3 mm spread over approximately 11 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Guanacaste during December?
The average wind speed in Guanacaste during December is 13 km/h, suggesting breezy to windy conditions, depending on your activities.

December rainfall patterns in Guanacaste

Explore the daily rainfall trends and prepare for Guanacastes December weather 💧
Typically, Guanacaste has 11 rainy days in December with a total of 93.3 mm of rainfall.

UV exposure in Guanacaste during December

Stay informed about UV levels for safe outdoor activities throughout the month of December ☀️

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Get accurate weather forecasts for Guanacaste, located at latitude 10.767 and longitude -85.647. Stay updated with localized weather information tailored for Guanacaste.

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