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 sea temperature 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
Weather in January
Temperature
Jaffna's January weather reaches an average high of 26.8°C (80.2°F) and an average low of 25.5°C (77.9°F), making it the coldest month.Humidity
In Jaffna, the average relative humidity in January is 76%.Rainfall
In Jaffna, in January, it is raining for 11.2 days, with typically 33mm (1.3") of accumulated precipitation. Throughout the year, in Jaffna, there are 148.6 rainfall days, and 769mm (30.28") of precipitation is accumulated.Sea temperature
January is the month with the coldest seawater, with an average sea temperature of 26.8°C (80.2°F).Note: Water temperature ranging between 25°C (77°F) and 29°C (84.2°F) is considered very warm and pleasing for everyone. It allows for enjoyable water activities over extended periods without discomfort.
Daylight
In January, the average length of the day is 11h and 38min.On the first day of the month, sunrise is at 06:25 and sunset at 18:00. On the last day of January, sunrise is at 06:31 and sunset at 18:14 +0530.
Sunshine
In Jaffna, the average sunshine in January is 8.5h.UV index
January through October and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index of 7 during January translates into these guidelines:
Prevent overexposure. Protection from the sun's harmful effects is needed. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Note! Reflective surfaces like sand and water heighten the UV radiation levels.
Frequently asked questions
What time of the year is the coldest in Jaffna?
What are January temperatures in Jaffna?
What is the average humidity in January in Jaffna?
How much does it rain in Jaffna in January?
When is the sea coldest in Jaffna?
What is the water temperature in January in Jaffna?
How many hours of daylight does Jaffna have in January?
When is the sunrise / sunset in January in Jaffna?
How long on average sun shines in January in Jaffna?
When is the highest UV index in Jaffna?
What is the UV index reading in January in Jaffna?
Average temperature in January
Jaffna, Sri Lanka
- Average high temperature in January: 26.8°C
The warmest month (with the highest average high temperature) is April (30.4°C).
The month with the lowest average high temperature is January (26.8°C).
- Average low temperature in January: 25.5°C
The month with the highest average low temperature is May (29°C).
The coldest month (with the lowest average low temperature) is January (25.5°C).
Average pressure in January
Jaffna, Sri Lanka
- Average pressure in January: 1012.5mbar
The month with the highest atmospheric pressure is January (1012.5mbar).
The month with the lowest atmospheric pressure is June (1005.9mbar).
Average wind speed in January
Jaffna, Sri Lanka
- Average wind speed in January: 22.9km/h
The windiest month (with the highest average wind speed) is June (33.8km/h).
The calmest months (with the lowest average wind speed) are March and April (16.7km/h).
Average humidity in January
Jaffna, Sri Lanka
- Average humidity in January: 76%
The months with the highest relative humidity are May, August and September (79%).
The month with the lowest relative humidity is March (75%).
Average rainfall in January
Jaffna, Sri Lanka
- Average rainfall in January: 33mm
The wettest month (with the highest rainfall) is October (191mm).
The driest month (with the least rainfall) is March (13mm).
Average rainfall days in January
Jaffna, Sri Lanka
- Average rainfall days in January: 11.2 days
The month with the highest number of rainy days is October (22.6 days).
The month with the least rainy days is March (5.8 days).
Average sea temperature in January
Jaffna, Sri Lanka
- Average sea temperature in January: 26.8°C
The best month for swimming (with the highest average sea temperature) is April (30.1°C).
The coldest month (with the lowest average sea temperature) is January (26.8°C).
Average daylight in January /
Average sunshine in January
Jaffna, Sri Lanka
- Average daylight in January: 11h and 4min
The month with the longest days is June (Average daylight: 12h and 42min).
The month with the shortest days is December (Average daylight: 11h and 36min).
- Average sunshine in January: 8h and 3min
The month with the most sunshine is June (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in January
Jaffna, Sri Lanka
- Average sunshine days in January: 15.4 days
The month with the most sunshine days is March (23.9 days).
The month with the least sunshine days is November (6.3 days).
Average UV index in January
Jaffna, Sri Lanka
- Average UV index in January: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October and December (UV index 7).
The month with the lowest UV index is November (UV index 6).
Average cloud cover in January
Jaffna, Sri Lanka
- Average cloud cover in January: 34
The month with the most cloud cover is December (Cloud cover 47).
The month with the least cloud cover is March (Cloud cover 16).
Average visibility in January
Jaffna, Sri Lanka
- Average visibility in January: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Jaffna, Sri Lanka
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