Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
January
Weather in January
Temperature
The beginning of January records an average high-temperature of a tropical 30.3°C (86.5°F), almost echoing the conditions of the previous month. Throughout January, an average low-temperature of 23.4°C (74.1°F) is experienced.Heat index
For January, the heat index is computed to be a fiery hot 37°C (98.6°F). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.The heat index's values are generally associated with conditions in shade and light breezes. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is the outcome of merging air's temperature and its humidity metrics. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.
Humidity
The months with the lowest humidity in Dediyawala are January and February, with an average relative humidity of 75%.Rainfall
The month with the least rainfall in Dediyawala is January, when the rain falls for 8.9 days and typically collects 25mm (0.98") of precipitation.Daylight
In January, the average length of the day is 11h and 47min.On the first day of January, sunrise is at 06:20 and sunset at 18:05. On the last day of the month, sunrise is at 06:28 and sunset at 18:18 +0530.
Sunshine
January has the most sunshine of the year, with an average of 9.2h of sunshine.UV index
The months with the highest UV index are January through April, July, September through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 7 during January translates into the following recommendations:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is January in Dediyawala?
What is the least humid month in Dediyawala?
What is the average humidity in January in Dediyawala?
What is the driest month in Dediyawala?
How much does it rain in Dediyawala in January?
What is the average length of the day in January in Dediyawala?
What time are sunrise and sunset in January in Dediyawala?
What month has the most sunshine in Dediyawala?
How many hours of sunshine does Dediyawala have in January?
What is the month with the highest UV index in Dediyawala?
What is the UV index reading in January in Dediyawala?
Average temperature in January
Dediyawala, Sri Lanka
- Average high temperature in January: 30.3°C
The warmest months (with the highest average high temperature) are March and April (31.3°C).
The month with the lowest average high temperature is August (28.6°C).
- Average low temperature in January: 23.4°C
The month with the highest average low temperature is May (26.3°C).
The coldest month (with the lowest average low temperature) is January (23.4°C).
Average pressure in January
Dediyawala, Sri Lanka
- Average pressure in January: 1011.6mbar
The month with the highest atmospheric pressure is January (1011.6mbar).
The month with the lowest atmospheric pressure is May (1008.7mbar).
Average wind speed in January
Dediyawala, Sri Lanka
- Average wind speed in January: 12.2km/h
The windiest month (with the highest average wind speed) is June (15.9km/h).
The calmest month (with the lowest average wind speed) is March (7.9km/h).
Average humidity in January
Dediyawala, Sri Lanka
- Average humidity in January: 75%
The months with the highest relative humidity are June, July and August (83%).
The months with the lowest relative humidity are January and February (75%).
Average rainfall in January
Dediyawala, Sri Lanka
- Average rainfall in January: 25mm
The wettest month (with the highest rainfall) is June (350mm).
The driest month (with the least rainfall) is January (25mm).
Average rainfall days in January
Dediyawala, Sri Lanka
- Average rainfall days in January: 8.9 days
The months with the highest number of rainy days are July and August (29.5 days).
The month with the least rainy days is January (8.9 days).
Average daylight in January /
Average sunshine in January
Dediyawala, Sri Lanka
- Average daylight in January: 11h and 5min
The month with the longest days is June (Average daylight: 12h and 30min).
The month with the shortest days is December (Average daylight: 11h and 42min).
- Average sunshine in January: 9h and 1min
The month with the most sunshine is January (Average sunshine: 9h and 12min).
The month with the least sunshine is November (Average sunshine: 6h and 48min).
Average sunshine days in January
Dediyawala, Sri Lanka
- Average sunshine days in January: 21 days
The month with the most sunshine days is January (21 days).
The months with the least sunshine days are June and July (0.3 days).
Average UV index in January
Dediyawala, Sri Lanka
- Average UV index in January: 7
The months with the highest UV index are January, February, March, April, July, September, October, November and December (UV index 7).
The months with the lowest UV index are May, June and August (UV index 6).
Average cloud cover in January
Dediyawala, Sri Lanka
- Average cloud cover in January: 24
The month with the most cloud cover is June (Cloud cover 55).
The month with the least cloud cover is January (Cloud cover 24).
Average visibility in January
Dediyawala, Sri Lanka
- Average visibility in January: 10km
The months with the highest visibility are January, February, March, April, November and December (10km).
The months with the lowest visibility are May, June, July, August, September and October (9km).
