December weather forecast
Tambor, Costa Rica

Finally, December marks the onset of the dry season in Tambor. The rain eases considerably compared to November, resulting in typically dry and sunny conditions characteristic of the season. It records only 27mm (1.06") of rainfall, a significant drop from November’s hefty 126mm (4.96"). A slight decrease in temperature ushers a pleasant chill into the air. Besides, the number of sunshine days rises again when compared to November, bringing a welcomed change to the dreary, rain-soaked days of the preceding months.

Temperature

During December, the average high-temperature in Tambor, Costa Rica, is a still moderately hot 29.5°C (85.1°F), maintaining a close resemblance to that of the preceding month. Tambor witnesses a consistent average low-temperature of 22.3°C (72.1°F) throughout December.

Heat index

December's mean heat index is appraised at a torrid 35°C (95°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
Records show heat index calculations are tailored for shaded regions and mild winds. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

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

Rainfall

In Tambor, in December, it is raining for 13.7 days, with typically 27mm (1.06") of accumulated precipitation. In Tambor, Costa Rica, during the entire year, the rain falls for 248.3 days and collects up to 1708mm (67.24") of precipitation.

Sea temperature

January through March, July through December, with an average sea temperature of 28°C (82.4°F), are months with the coldest seawater in Tambor, Costa Rica.
Note: Water surface temperatures from 25°C (77°F) to 29°C (84.2°F) are considered optimal and extremely delightful for long-lasting pleasure in any water activity.

Daylight

The month with the shortest days in Tambor is December, with an average of 11h and 36min of daylight.
On the first day of December, sunrise is at 05:41 and sunset at 17:17. On the last day of the month, sunrise is at 05:56 and sunset at 17:30 CST.

Sunshine

In December, the average sunshine in Tambor is 9.6h.

UV index

January through October and December, with an average maximum UV index of 7, are months with the highest UV index in Tambor. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for average individuals.
Note: An average UV index of 7 in December transforms into this advice:
Guard against overexposure. Protection from sun-induced harm is essential. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Be attentive! The UV exposure is heightened with reflections from sand and water.