January weather forecast
Gampaha, Sri Lanka

Gampaha,City, begins the year with a moderate climate. The temperatures are mild and the city starts experiencing more rainfall. A notable characteristic of January is its relative humidity of 73% which, combined with an average rainfall of 29mm (1.14"), contributes to a moist, cool atmosphere. Wind speed increases to an average 16.2km/h (10.1mph), with a maximum wind speed of 16.9km/h (10.5mph), which brings in cooler air from the surrounding regions. City life doesn't slow down though, as residents take advantage of this slight dip in temperatures.

Temperature

Gampaha's January reports an average high-temperature of a hot 30.8°C (87.4°F), exhibiting a minor difference from December. During January, Gampaha observes a consistent average nighttime temperature of 22.8°C (73°F).

Heat index

The heat index value for January is appraised at a fiery hot 38°C (100.4°F). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'real feel' or 'apparent temperature', shows a temperature sensation when both heat and moisture conditions are combined. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. 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 extremely significant for babies and toddlers. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

January and February, with an average relative humidity of 73%, are the least humid months in Gampaha.

Rainfall

January is the month with the least rainfall. Rain falls for 9.7 days and accumulates 29mm (1.14") of precipitation.

Daylight

The average length of the day in January is 11h and 46min.
On the first day of the month, sunrise is at 06:21 and sunset at 18:04. On the last day of January, sunrise is at 06:28 and sunset at 18:17 +0530.

Sunshine

January through April, with an average of 9.2h of sunshine, are months with the most sunshine.

UV index

January through April, July, September, November and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In January, the maximum UV index of 7 suggests these recommendations:
Ward off overexposure. Defence against solar harm is crucial. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.