January weather forecast
San José Villanueva, El Salvador

In San José Villanueva, January ushers in the New Year with milder temperatures and relative humidity at 65%, offering a comfortable start to the year. Winds range from 8.5km/h (5.3mph) to gusts of 12.2km/h (7.6mph), keeping the atmosphere pleasantly breezy. January is distinguished by long hours of sunlight, with up to 11.4 daylight hours and as much as 7.7 hours of sunshine. The month experiences a minimum rainfall of 1mm (0.04"), making it one of the driest months of the year. The consistently clear days coupled with a UV index of 6 indicate fair weather conditions and promote outdoor activities.

Temperature

The arrival of January brings an average high-temperature of a tropical 30.6°C (87.1°F), closely following the temperature pattern of December. Throughout January, the average low-temperature in San José Villanueva records at a refreshing 19.4°C (66.9°F).

Heat index

For January, the heat index is estimated at a sweltering 35°C (95°F). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
Be advised, the heat index considers values for conditions in shade and with a light breeze. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

The average relative humidity in January is 65%.

Rainfall

January is the month with the least rainfall. Rain falls for 1.9 days and accumulates 1mm (0.04") of precipitation.

Daylight

In San José Villanueva, the average length of the day in January is 11h and 26min.
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

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

UV index

The months with the lowest UV index in San José Villanueva are January, May, June, August through December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 6 during January translates into the following recommendations:
Eschew overexposure. Those with light skin may suffer burns in fewer 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. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.