January weather forecast
Sámara, Costa Rica

Transitioning from the somewhat cooler December, January in Sámara, Costa Rica, bears witness to marginally warmer temperatures. Still maintaining a tranquil ambiance, the city begins to bask under an average of 11.6 daylight hours. Humidity levels manifest an apposite decrease from December to 71%, while cloud cover also records a noticeable decrease. Notably, despite these changes, the sea still remains warm at approximately 27.3°C (81.1°F). The weather conditions combine to form a moderate UV index level of 7.

Temperature

The commencement of January notes an average high-temperature of a tropical 30.5°C (86.9°F), exhibiting little difference from the previous month. In January, Sámara experiences a temperature dip to an average of 22.4°C (72.3°F) at night.

Heat index

For most parts of January, the heat index is calculated to be a very hot 37°C (98.6°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
Always consider that heat index estimations are for light winds and places in the shade. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is achieved by amalgamating air temperature with the relative humidity readings. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
Sweat evaporation, driven by perspiration, is the method the human body uses to rid itself of excessive warmth. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

In January, the average relative humidity in Sámara is 71%.

Rainfall

In Sámara, in January, it is raining for 4 days, with typically 5mm (0.2") of accumulated precipitation. In Sámara, Costa Rica, during the entire year, the rain falls for 205 days and collects up to 1087mm (42.8") of precipitation.

Sea temperature

January is the month with the coldest seawater, with an average sea temperature of 27.3°C (81.1°F).
Note: Water activities including swimming and diving are pleasurable in temperatures between 25°C (77°F) and 29°C (84.2°F), ensuring comfort and enjoyment for extended time frames.

Daylight

The average length of the day in January is 11h and 37min.
On the first day of January in Sámara, Costa Rica, sunrise is at 05:58 and sunset at 17:32. On the last day of the month, sunrise is at 06:04 and sunset at 17:46 CST.

Sunshine

In January, the average sunshine is 7.6h.

UV index

The months with the highest UV index in Sámara are January through December, with an average maximum UV index of 7. The months with the lowest UV index in Sámara are January through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: An average UV index of 7 in January transforms into this advice:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Note! Reflective surfaces like sand and water heighten the UV radiation levels.