January weather forecast
Upala, Costa Rica

Comparatively, January in Upala, Costa Rica experiences cooler temperatures when put side by side with February. The transition from a cooler to a warmer month is characterized by a moderate increase in temperature. Relative humidity is somewhat high, often leading to drizzly conditions. January furthermore marks one of the months with the maximum number of overcast days, signalling the onset of the wet season. The month notably starts on a wetter note with average rainfall of 39mm (1.54") occurring over roughly 22 days.

Temperature

Upala's average high-temperature in January is a still warm 27.7°C (81.9°F), marking an insignificant difference from the 27.4°C (81.3°F) of December. Throughout January, Upala witnesses a nighttime temperature average of 21.8°C (71.2°F).

Heat index

During January, the heat index is appraised at a tropical 32°C (89.6°F). If one remains active during constant exposure, it might cause exhaustion and heat cramps.
Data suggests that the heat index is set for environments in shade and with a light wind. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.

Humidity

The average relative humidity in January in Upala is 84%.

Rainfall

In Upala, in January, during 21.8 rainfall days, 39mm (1.54") of precipitation is typically accumulated. In Upala, during the entire year, the rain falls for 295.8 days and collects up to 1656mm (65.2") of precipitation.

Daylight

In January, the average length of the day is 11h and 34min.
On the first day of January in Upala, sunrise is at 05:58 and sunset at 17:28. On the last day of the month, sunrise is at 06:03 and sunset at 17:43 CST.

Sunshine

January has the least sunshine of the year in Upala, with an average of 4.6h of sunshine.

UV index

January, February, July, October through December, with an average maximum UV index of 6, are months with the lowest UV index in Upala, Costa Rica. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: In January, a regular UV index of 6 translates into these guidelines:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.