Monaghan County Weather in December

Average temperatures, rainfall, sunshine and the best places to visit in Monaghan County, Ireland in December.

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Monaghan Carrickmacross Lisnalong Castleblayney

Considering a trip to Monaghan County, Ireland this December and wondering about the expected weather conditions? Find all the crucial information you need right here, addressing your question:

What to Expect in Monaghan County in December

Monaghan County, Ireland is a region in Ireland. December in Monaghan County generally has cold temperatures, with moderate precipitation. During December, winter is in full swing.

Temperatures

You can expect cold maximum daytime temperatures of around 9°C (48°F) and nighttime temperatures around 3°C (37°F) in Monaghan.

To learn more about the conditions in specific areas of Monaghan County, Ireland, check out the map below.

Precipitation

In December, precipitation varies across different areas. From moderate rainfall in Carrickmacross with an average of 83 mm (3.3 in) to moderate rainfall in Monaghan with 88 mm (3.5 in).

Average sunshine

Sunshine is quite limited in many locations during December. Monaghan receives roughly 39 hours of sunlight. For destinations with more sunshine, our weather planner offers alternatives worldwide.

Explore Monaghan County by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Best Places to Visit in Monaghan County in December

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Monaghan County.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Monaghan County

What is the weather like in December for some of the most popular destinations in Monaghan County, Ireland?

Temperature range in Monaghan County (December)

Precipitation variation in Monaghan County (December)

Monaghan

In December Monaghan generally has low temperatures with maximum daytime temperatures around 9°C (48°F), minimum nighttime temperatures around 3°C (37°F) and moderate monthly rainfall. So on average the conditions are poor that month.

« November
December
January »
November
December
January
Max temperature
11°C (52°F)
9°C (48°F)
9°C (48°F)
Min temperature
5°C (41°F)
3°C (37°F)
3°C (37°F)
Monthly sun hours
59 hours
39 hours
45 hours
Monthly rainfall
88 mm (3.5 in)
88 mm (3.5 in)
85 mm (3.3 in)
Monthly rainy days
19 days
20 days
21 days
Weather conditions
unpleasant
poor
poor
Climate in Monaghan →

Carrickmacross

In December Carrickmacross generally has low temperatures with maximum daytime temperatures around 9°C (48°F), minimum nighttime temperatures around 3°C (37°F) and moderate monthly rainfall. So on average the conditions are poor that month.

« November
December
January »
November
December
January
Max temperature
11°C (52°F)
9°C (48°F)
9°C (48°F)
Min temperature
5°C (41°F)
3°C (37°F)
3°C (37°F)
Monthly sun hours
71 hours
51 hours
56 hours
Monthly rainfall
85 mm (3.3 in)
83 mm (3.3 in)
78 mm (3.1 in)
Monthly rainy days
18 days
19 days
20 days
Weather conditions
unpleasant
poor
poor
Climate in Carrickmacross →

Lisnalong

In December Lisnalong generally has low temperatures with maximum daytime temperatures around 9°C (48°F), minimum nighttime temperatures around 3°C (37°F) and moderate monthly rainfall. So on average the conditions are poor that month.

« November
December
January »
November
December
January
Max temperature
11°C (52°F)
9°C (48°F)
9°C (48°F)
Min temperature
5°C (41°F)
3°C (37°F)
3°C (37°F)
Monthly rainfall
87 mm (3.4 in)
86 mm (3.4 in)
83 mm (3.3 in)
Monthly rainy days
19 days
20 days
21 days
Weather conditions
unpleasant
poor
poor
Climate in Lisnalong →

Castleblayney

In December Castleblayney generally has low temperatures with maximum daytime temperatures around 9°C (48°F), minimum nighttime temperatures around 3°C (37°F) and moderate monthly rainfall. So on average the conditions are poor that month.

« November
December
January »
November
December
January
Max temperature
11°C (52°F)
9°C (48°F)
9°C (48°F)
Min temperature
5°C (41°F)
3°C (37°F)
3°C (37°F)
Monthly sun hours
59 hours
39 hours
45 hours
Monthly rainfall
85 mm (3.3 in)
84 mm (3.3 in)
80 mm (3.1 in)
Monthly rainy days
18 days
19 days
20 days
Weather conditions
unpleasant
poor
poor
Climate in Castleblayney →

Is your destination not in the list? Have a look at all destinations in Monaghan County, in Ireland.

In our records: Ireland December extremes

Notable December records observed across cities in Ireland in our climate database (1976 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • Based on our data, the coldest December night in Ireland dropped to -16°C (3°F) in Donegal on December 23, 2010.
  • In our records, the coldest December daytime high in Ireland was -7°C (19°F) in Lurgan on December 21, 2010.

Popular cities in December

Day & night temperatures, rainfall and average weather in Monaghan County in December.

City Weather Day temp Night temp Rainfall
Monaghan 9°C (48°F) 3°C (37°F) 88 mm (3.5 in)
Carrickmacross 9°C (48°F) 3°C (37°F) 83 mm (3.3 in)
Lisnalong 9°C (48°F) 3°C (37°F) 86 mm (3.4 in)
Castleblayney 9°C (48°F) 3°C (37°F) 84 mm (3.3 in)

Monaghan County weather in December: frequently asked questions

What is the weather like in Monaghan County, Ireland in December?

In December, Monaghan County, Ireland generally has poor weather conditions. Monaghan sees daytime temperatures near 9°C (48°F), with nights cooling to roughly 3°C (37°F).

What is the average temperature in Monaghan County, Ireland in December?

Monaghan averages a daytime maximum of 9°C (48°F) in December, with overnight lows close to 3°C (37°F).

Does Monaghan County, Ireland get a lot of rain in December?

Rain is generally moderate to light in Monaghan County, Ireland during December, with Monaghan averaging close to 88 mm (3.5 in).

Is December a Good Time to Visit Monaghan County, Ireland?

In our view, December might not be the best time to travel to Monaghan County, Ireland with often poor weather in Monaghan.

Generally speaking, the best visiting conditions can be found in July offering mostly perfect weather in Monaghan. On the other hand, the weather in January, February and December tend to be poor.

Interested in more climate information?

We have much more information about the climate in Monaghan County.

Weather and climate has detailed information for every country in the world. Are you going to Ireland? Get detailed historical weather averages for many cities in Ireland.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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