January weather forecast
Nejapa, El Salvador

Nejapa residents get a fresh start to the year with mild weather in January. While still enough to feel a tropical climate, a notable drop in rainfall is observed, providing only 1mm (0.04") of precipitation. This makes January dry with dust-laden winds, and the skies are devoid of much cloud cover. The air isn't always crisp due to reduced visibility, and sunny days is a norm here. As a result, the probability of experiencing crystal clear skies during January are quite high.

Temperature

January's climate shows a minor adjustment in average high-temperatures to a hot 30.6°C (87.1°F) from December's 29.9°C (85.8°F). In the month of January, an average of 19.4°C (66.9°F) marks the low-temperature.

Heat index

For most parts of January, the heat index is estimated at a torrid 35°C (95°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'felt air temperature', joins air temperature with relative humidity to produce a temperature perception for humans. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

In Nejapa, the average relative humidity in January is 65%.

Rainfall

The month with the least rainfall is January, when the rain falls for 1.9 days and typically collects 1mm (0.04") of precipitation.

Daylight

In January, the average length of the day is 11h and 25min.
On the first day of January, sunrise is at 06:20 and sunset at 17:40. On the last day of the month, sunrise is at 06:24 and sunset at 17:56 CST.

Sunshine

The months with the least sunshine are January and December, with an average of 7.7h of sunshine.

UV index

The months with the lowest UV index are January, May, June, August through December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for average individuals.
Note: In January, a daily UV index of 6 turns into the following recommendations:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.