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 snowfall in January
- Average snowfall 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
January
Weather in January
Temperature
January and February are the coldest months, with an average high-temperature of 7.8°C (46°F).Humidity
In January, the average relative humidity in Dún Laoghaire is 84%.Rainfall
In Dún Laoghaire, during January, the rain falls for 16.6 days and regularly aggregates up to 41mm (1.61") of precipitation. In Dún Laoghaire, during the entire year, the rain falls for 200.5 days and collects up to 530mm (20.87") of precipitation.Snowfall
January through March, November and December are months with snowfall in Dún Laoghaire, Ireland. In Dún Laoghaire, in January, during 1.3 snowfall days, 5mm (0.2") of snow is typically accumulated. Throughout the year, there are 4.6 snowfall days, and 24mm (0.94") of snow is accumulated.Sea temperature
In Dún Laoghaire, in January, the average water temperature is 9.6°C (49.3°F).Note: Navigating the 9.6°C (49.3°F) at 13°C (55.4°F) is no joy, and temperatures less than 10°C (50°F) can threaten breathing and cause a chilling shock, gauging personal stamina.
Daylight
The average length of the day in January is 8h and 11min.On the first day of January in Dún Laoghaire, Ireland, sunrise is at 8:39 am and sunset at 4:16 pm. On the last day of the month, sunrise is at 8:10 am and sunset at 5:04 pm GMT.
Sunshine
In January, the average sunshine is 4.4h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Dún Laoghaire. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In January, the UV index of 2 transforms into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month in Dún Laoghaire?
What is the average January temperature in Dún Laoghaire?
What is the average humidity in January in Dún Laoghaire?
How many days does it rain in January in Dún Laoghaire?
How much does it snow in Dún Laoghaire in January?
How cold is the water in January in Dún Laoghaire?
What is the average length of the day in January in Dún Laoghaire?
What time are sunrise and sunset in January in Dún Laoghaire?
How long on average sun shines in January in Dún Laoghaire?
What is the month with the lowest UV index in Dún Laoghaire?
How high is the UV index in January in Dún Laoghaire?
Average temperature in January
Dún Laoghaire, Ireland
- Average high temperature in January: 7.8°C
The warmest months (with the highest average high temperature) are July and August (16.9°C).
The months with the lowest average high temperature are January and February (7.8°C).
- Average low temperature in January: 4.5°C
The month with the highest average low temperature is August (12.7°C).
The coldest month (with the lowest average low temperature) is February (4.4°C).
Average pressure in January
Dún Laoghaire, Ireland
- Average pressure in January: 1011.6mbar
The month with the highest atmospheric pressure is May (1016mbar).
The month with the lowest atmospheric pressure is November (1008.3mbar).
Average wind speed in January
Dún Laoghaire, Ireland
- Average wind speed in January: 25.8km/h
The windiest month (with the highest average wind speed) is December (25.9km/h).
The calmest month (with the lowest average wind speed) is July (15.9km/h).
Average humidity in January
Dún Laoghaire, Ireland
- Average humidity in January: 84%
The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is March (82%).
Average rainfall in January
Dún Laoghaire, Ireland
- Average rainfall in January: 41mm
The wettest month (with the highest rainfall) is November (71mm).
The driest month (with the least rainfall) is May (27mm).
Average rainfall days in January
Dún Laoghaire, Ireland
- Average rainfall days in January: 16.6 days
The month with the highest number of rainy days is July (20.4 days).
The months with the least rainy days are March and September (14.9 days).
Average snowfall in January
Dún Laoghaire, Ireland
- Average snowfall in January: 5mm
The month with the highest snowfall is December (9mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in January
Dún Laoghaire, Ireland
- Average snowfall days in January: 1.3 days
The months with the highest number of snowfall days are January and February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in January
Dún Laoghaire, Ireland
- Average sea temperature in January: 9.6°C
The best month for swimming (with the highest average sea temperature) is August (14.9°C).
The coldest month (with the lowest average sea temperature) is March (8.4°C).
Average daylight in January /
Average sunshine in January
Dún Laoghaire, Ireland
- Average daylight in January: 8h and 1min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in January: 4h and 2min
The month with the most sunshine is May (Average sunshine: 8h and 0min).
The month with the least sunshine is November (Average sunshine: 4h and 18min).
Average sunshine days in January
Dún Laoghaire, Ireland
- Average sunshine days in January: 10.9 days
The month with the most sunshine days is April (11.7 days).
The month with the least sunshine days is July (7.2 days).
Average UV index in January
Dún Laoghaire, Ireland
- Average UV index in January: 2
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Dún Laoghaire, Ireland
- Average cloud cover in January: 55
The months with the most cloud cover are February and November (Cloud cover 56).
The month with the least cloud cover is September (Cloud cover 48).
Average visibility in January
Dún Laoghaire, Ireland
- Average visibility in January: 10km
The months with the highest visibility are January, March, October and November (10km).
The months with the lowest visibility are February, April, May, June, July, August, September and December (9km).
