December weather forecast
Herradura, Costa Rica

Moving into December, Herradura's climate stabilizes as rainfall and humidity drop lower. With fewer days of rain recorded only at 16.3, the city begins to dry up. The sea temperature reads steady at 28°C (82.4°F), offering equally warm waters as any other time of the year. Famously known as the windy month, December experiences an uptick in wind speed to 9.1km/h (5.7mph). With Christmas around the corner and a comfortable climate to relish, expect vibrant celebrations and enchanting beach-activities in the city of Herradura, making it a fitting end to the year.

Temperature

Herradura records an average high-temperature of a still warm 28.7°C (83.7°F) in December, closely mirroring the climate of the previous month. December nights cool to an average low-temperature of 24.6°C (76.3°F), a marginal decrease from its daytime equivalent.

Heat index

In December, the average heat index is computed to be a tropical 33°C (91.4°F). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', takes into account both air temperature and humidity to illustrate what people actually feel. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.

Humidity

In Herradura, the average relative humidity in December is 75%.

Rainfall

In Herradura, in December, during 16.3 rainfall days, 41mm (1.61") of precipitation is typically accumulated. Throughout the year, there are 236.2 rainfall days, and 1501mm (59.09") of precipitation is accumulated.

Sea temperature

January, February, September through December, with an average sea temperature of 28°C (82.4°F), are months with the coldest seawater.
Note: In water temperatures ranging between 25°C (77°F) and 29°C (84.2°F), activities such as swimming and diving become highly pleasurable for long durations.

Daylight

The month with the shortest days is December, with an average of 11h and 36min of daylight.
On the first day of the month, sunrise is at 05:39 and sunset at 17:15. On the last day of December, sunrise is at 05:54 and sunset at 17:29 CST.

Sunshine

In Herradura, the average sunshine in December is 9.4h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.
Note: In December, a daily maximum UV index of 7 leads to the following instructions:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Be attentive! The UV exposure is heightened with reflections from sand and water.