Dublin
Ireland
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
Dublin, Ireland

A sunset view of the illuminated Ha Penny Bridge reflected in the water below, in Dublin, Ireland
A sunset view of the illuminated Ha Penny Bridge reflected in the water below, in Dublin, Ireland
January is the coldest month of the year in Dublin, with the winter in full cry; the weather is damp and cold, with 63.5mm (2.5") of precipitation.
The average low temperature is 2.2°C (36°F), while the average high is only ten degrees higher at 7.8°C (46°F). The weather is not glacially cold. However, winter is hardly a time to wander outdoors - an extra layer of warm clothes, preferably, a warm winter coat is in order for unavoidable open-air walks.
Visit a pub, if outside, and drink a pint or two of Guinness, to withstand the chattering teeth and cold.

What is the coldest month in Dublin?

The coldest month in Dublin is January, with an average high-temperature of 8.8°C (47.8°F) and an average low-temperature of 3.9°C (39°F).

What is the temperature in January in Dublin?

The average high-temperature, in January, in Dublin, Ireland, is 8.8°C (47.8°F), while the average low-temperature is 3.9°C (39°F).

How many days does it rain in January in Dublin?

In Dublin, Ireland, during January, the rain falls for 12 days and regularly aggregates up to 62.6mm (2.5") of precipitation.

What is the sea water temperature in January in Dublin?

In January, the average sea temperature in Dublin, Ireland, is 9.6°C (49.3°F). At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

How many hours of daylight does Dublin have in January?

In January, the average length of the day is 8.2h.

How many hours of sunshine does Dublin have in January?

In Dublin, the average sunshine in January is 1.9h.

What is the month with the lowest UV index in Dublin?

January and December, with an average maximum UV index of 0, are months with the lowest UV index in Dublin, Ireland.

What is the UV index intensity in January in Dublin?

In Dublin, Ireland, the average daily maximum UV index in January is 0. A UV Index of 2, and less, symbolizes a minimal hazard to health from unprotected exposure to the UV radiation.
Average temperature in January - Dublin, Ireland
  • Average high temperature in January: 8.8°C

The warmest month (with the highest average high temperature) is July (20.2°C).
The month with the lowest average high temperature is January (8.8°C).

  • Average low temperature in January: 3.9°C

The month with the highest average low temperature is July (13.5°C).
Coldest months (with the lowest average low temperature) are January and February (3.9°C).

Average rainfall in January - Dublin, Ireland
  • Average rainfall in January: 62.6mm

The wettest month (with the highest rainfall) is October (76mm).
The driest month (with the lowest rainfall) is February (46.1mm).

Average rainfall days in January - Dublin, Ireland
  • Average rainfall days in January: 12 days

Months with the highest number of rainy days are January, October and December (12 days).
Months with the lowest number of rainy days are June and September (9 days).

Average sea temperature in January - Dublin, 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 - Dublin, Ireland
  • Average daylight in January: 8.2h

The month with the longest days is June (Average daylight: 16.9h).
The month with shortest days is December (Average daylight: 7.6h).

  • Average sunshine in January: 1.9h

The month with most sunshine is May (Average sunshine: 6.3h).
The month with least sunshine is December (Average sunshine: 1.7h).

Average UV index in January - Dublin, Ireland
  • Average UV index in January: 0

Months with the highest UV index are June and July (UV index 6).
Months with the lowest UV index are January and December (UV index 0).