January weather forecast
Dundalk, Ireland

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Weather in January

January brings the coldest season in Dundalk, Ireland, with the temperatures fluctuating between 2.2°C (36°F) to 6.8°C (44.2°F). Amidst the chill, a significant percentage of cloud cover, calculated at 62%, conceals most of the sunlight, resulting in short days lasting only 8.1 hours. January’s wind, gusting up to 34.2km/h (21.3mph), imparts a distinctly crisp feel to the air. To stay prepared, locals and visitors must equip themselves with warm clothing and always carry an umbrella due to the consistent, albeit moderate, levels of rainfall. Despite the chilly weather, the low UV index of 2 ensures minimal risk of skin damage from sunlight exposure.

Temperature

In Dundalk, January is the coldest month, with temperatures averaging a high of 6.8°C (44.2°F) and a low of 2.2°C (36°F).

Humidity

In Dundalk, the average relative humidity in January is 90%.

Rainfall

January is the month with the least rainfall. Rain falls for 8.6 days and accumulates 8mm (0.31") of precipitation.

Snowfall

January through March and December are months with snowfall. In January, in Dundalk, it is snowing for 1.4 days. Throughout January, 5mm (0.2") of snow is accumulated. Throughout the year, in Dundalk, there are 4.4 snowfall days, and 13mm (0.51") of snow is accumulated.

Daylight

In Dundalk, the average length of the day in January is 8h and 4min.
On the first day of the month, sunrise is at 8:44 am and sunset at 4:13 pm. On the last day of January, in Dundalk, sunrise is at 8:14 am and sunset at 5:03 pm GMT.

Sunshine

In Dundalk, the average sunshine in January is 3.8h.

UV index

The average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: A daily maximum UV index of 2 in January translates into the following instructions:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Updated: Jan 27, 2024 | Published by: Weather Atlas | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What time of the year is the coldest in Dundalk?

January is the month when Dundalk, Ireland, sees the average lowest temperatures, with a high of 6.8°C (44.2°F) and a low of 2.2°C (36°F).

How cold does it get in Dundalk in January?

The average high-temperature, in January, in Dundalk, is 6.8°C (44.2°F), while the average low-temperature is 2.2°C (36°F).

What is the average humidity in January in Dundalk?

In January, the average relative humidity in Dundalk, Ireland, is 90%.

What is the driest month in Dundalk?

January is the month with the least rainfall. Rain falls for 8.6 days and accumulates 8mm (0.31") of precipitation.

How much does it rain in Dundalk in January?

In Dundalk, Ireland, in January, it is raining for 8.6 days, with typically 8mm (0.31") of accumulated precipitation.

How much does it snow in Dundalk in January?

In Dundalk, Ireland, during January, snow falls for 1.4 days and regularly aggregates up to 5mm (0.2") of snow.

How many hours of daylight does Dundalk have in January?

The average day length in January is 8h and 4min.

When are sunrise and sunset in January in Dundalk?

In January, on the first day of the month, sunrise is at 8:44 am and sunset at 4:13 pm. On the last day of the month, in Dundalk, Ireland, sunrise is at 8:14 am and sunset at 5:03 pm GMT.

How many hours of sunshine does Dundalk have in January?

The average sunshine duration in January in Dundalk, Ireland, is 3.8h.

What is the UV index reading in January in Dundalk?

In Dundalk, Ireland, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a low health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Dundalk, Ireland

Average temperature in January - Dundalk, Ireland
  • Average high temperature in January: 6.8°C

The warmest month (with the highest average high temperature) is July (17.3°C).
The month with the lowest average high temperature is January (6.8°C).

  • Average low temperature in January: 2.2°C

The month with the highest average low temperature is July (10.7°C).
The coldest month (with the lowest average low temperature) is January (2.2°C).

Average pressure in January
Dundalk, Ireland

Average pressure in January - Dundalk, Ireland
  • Average pressure in January: 1010.6mbar

The month with the highest atmospheric pressure is May (1015.7mbar).
The month with the lowest atmospheric pressure is November (1007.7mbar).

Average wind speed in January
Dundalk, Ireland

Average wind speed in January - Dundalk, Ireland
  • Average wind speed in January: 20.2km/h

The windiest month (with the highest average wind speed) is January (20.2km/h).
The calmest months (with the lowest average wind speed) are June and July (13km/h).

Average humidity in January
Dundalk, Ireland

Average humidity in January - Dundalk, Ireland
  • Average humidity in January: 90%

The month with the highest relative humidity is December (91%).
The months with the lowest relative humidity are March and April (85%).

Average rainfall in January
Dundalk, Ireland

Average rainfall in January - Dundalk, Ireland
  • Average rainfall in January: 8mm

The wettest month (with the highest rainfall) is June (21mm).
The driest month (with the least rainfall) is January (8mm).

Average rainfall days in January
Dundalk, Ireland

Average rainfall days in January - Dundalk, Ireland
  • Average rainfall days in January: 8.6 days

The month with the highest number of rainy days is July (14.3 days).
The month with the least rainy days is September (7 days).

Average snowfall in January
Dundalk, Ireland

Average snowfall in January - Dundalk, Ireland
  • Average snowfall in January: 5mm

The month with the highest snowfall is February (6mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).

Average snowfall days in January
Dundalk, Ireland

Average snowfall days in January - Dundalk, Ireland
  • Average snowfall days in January: 1.4 days

The month with the highest number of snowfall days is January (1.4 days).
The months with the least snowfall days are May, June, July, August, September, October and November (0 days).

Average daylight in January /
Average sunshine in January
Dundalk, Ireland

Average daylight in January / Average sunshine in January - Dundalk, Ireland
  • Average daylight in January: 8h and 1min

The month with the longest days is June (Average daylight: 17h and 0min).
The month with the shortest days is December (Average daylight: 7h and 30min).

  • Average sunshine in January: 3h and 5min

The month with the most sunshine is June (Average sunshine: 6h and 42min).
The months with the least sunshine are February and October (Average sunshine: 3h and 42min).

Average sunshine days in January
Dundalk, Ireland

Average sunshine days in January - Dundalk, Ireland
  • Average sunshine days in January: 17.7 days

The month with the most sunshine days is October (18.8 days).
The month with the least sunshine days is July (9.5 days).

Average UV index in January
Dundalk, Ireland

Average UV index in January - Dundalk, Ireland
  • Average UV index in January: 2

The months with the highest UV index are June and August (UV index 4).
The month with the lowest UV index is February (UV index 1).

Average cloud cover in January
Dundalk, Ireland

Average cloud cover in January - Dundalk, Ireland
  • Average cloud cover in January: 62

The months with the most cloud cover are July and August (Cloud cover 66).
The month with the least cloud cover is April (Cloud cover 57).

Average visibility in January
Dundalk, Ireland

Average visibility in January - Dundalk, Ireland
  • Average visibility in January: 9km

The months with the highest visibility are January, February, March, April, May, October, November and December (9km).
The months with the lowest visibility are June, July, August and September (8km).

Dundalk, Ireland

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