Dublin
Ireland
Long-term weather forecast
Long-term weather forecast
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January weather forecast and Climate
Dublin, Ireland

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A sunset view of the illuminated Ha Penny Bridge reflected in the water below, found in Dublin, Ireland
A sunset view of the illuminated Ha Penny Bridge reflected in the water below, found in Dublin, Ireland
January is the coldest month of the year in Dublin, with the winter in full cry. It 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). Weather is not glacially cold, but 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.
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  • The 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).

  • The 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).

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  • The 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).

  • The 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).

  • The 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).

  • The average daylight in January: 8h

The month with the longest days is June (Average daylight: 17h).
Months with shortest days are January and December (Average daylight: 8h).

  • The 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).

  • The 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).

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