Current weather models show a sudden drop in temperature is on the horizon – and it spells bad news for workers heading back to the office after the Christmas break
13:26, 27 Dec 2025Updated 16:31, 27 Dec 2025
Temperatures will drop dramatically from Monday, January 5
It’s set to be a bitterly cold start to the new year, with a weather expert revealing that conditions are set to take a dramatic turn over the coming days.
Ireland has enjoyed a surprisingly mild festive season so far, with temperatures failing to fall below freezing over much of the Christmas period.
However, that looks set to change as we enter 2026, with a weather expert warning that workers will have to wrap up on their return to the office after their Christmas holidays.
Alan O’Reilly, the hobbyist meteorologist who runs the popular Carlow Weather social media pages, revealed that current weather models show a chance of cold air moving in on Monday, January 5, which will see temperatures plummet and bitterly cold conditions take over.
Current weather models show a band of cold air dominating the conditions from Monday, January 5
In a message shared with his followers on Saturday morning (December 27), O’Reilly said: “Weather models show uncertainty on chances of some colder air moving in for 5th Jan with models differing on location of high pressure and depth of cold.
“Could be a chilly return to first full working week though!”
According to Met Eireann’s extended forecast, high pressure is signalled to dominate our weather next week, bringing predominately dry conditions but colder than average due to a chilly northeasterly airflow.
The national forecaster has warned that there will be frosts at night, the extent of which will vary due to cloud cover.
Fog will likely develop at times too and due to the mostly light airflow and low angle of the sun, it will be slow to clear during the days and may persist in areas.
From Monday, January 5, to Sunday, January 11, the weather will be dominated by high pressure once again, though it may weaken and drift westwards.
However, there is still a strong signal for much drier than normal conditions.
Met Eireann said much of the country will still have below average temperatures with the chilly northeasterly airflow but parts of the north may return closer to normal. As in the previous week, frost and fog will develop at times.
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