Roscommon County Weather in December

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

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Boyle Roscommon Ballyfarnon Strokestown

Thinking about venturing to Roscommon County, Ireland this December and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:

What to Expect in Roscommon County in December

Roscommon County, Ireland is a region in Ireland. December in Roscommon County generally has cold temperatures, with high precipitation. December falls during the winter season.

Temperatures

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

To explore the conditions in Roscommon County, Ireland in more detail, check the map below.

Precipitation

In December, precipitation varies across different areas. From high rainfall in Roscommon with an average of 100 mm (3.9 in) to high rainfall in Ballyfarnon with 116 mm (4.6 in). Based on climate data from the last 30 years, Boyle receives the most rainfall during this month of the year.

Average sunshine

Sunshine tends to be more scarce in many locations. Boyle gets roughly 35 hours of sunlight. For sunnier alternatives, check our weather planner to find destinations with better conditions.

Explore Roscommon County by month

Pick a month to see the average temperature, rainfall and sunshine in Roscommon County — and find the best time to visit. (based on Boyle)

January9°C (48°F) February9°C (48°F) March11°C (52°F) April13°C (55°F) May16°C (61°F) June18°C (64°F) This monthJuly19°C (66°F) August19°C (66°F) September17°C (63°F) October14°C (57°F) November11°C (52°F) December9°C (48°F)
Best Time to Visit Roscommon County →

Best Places to Visit in Roscommon County in December

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

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

Temperature range in Roscommon County (December)

Precipitation variation in Roscommon County (December)

Boyle

In December Boyle generally has low temperatures with maximum daytime temperatures around 9°C (48°F), minimum nighttime temperatures around 3°C (37°F) and high 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
54 hours
35 hours
45 hours
Monthly rainfall
109 mm (4.3 in)
113 mm (4.4 in)
109 mm (4.3 in)
Monthly rainy days
22 days
22 days
23 days
Weather conditions
poor
poor
poor
Climate in Boyle →

Roscommon

In December Roscommon generally has low temperatures with maximum daytime temperatures around 9°C (48°F), minimum nighttime temperatures around 4°C (39°F) and high 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)
4°C (39°F)
3°C (37°F)
Monthly sun hours
54 hours
35 hours
45 hours
Monthly rainfall
99 mm (3.9 in)
100 mm (3.9 in)
96 mm (3.8 in)
Monthly rainy days
20 days
21 days
22 days
Weather conditions
unpleasant
poor
poor
Climate in Roscommon →

Ballyfarnon

In December Ballyfarnon generally has low temperatures with maximum daytime temperatures around 9°C (48°F), minimum nighttime temperatures around 3°C (37°F) and high 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
54 hours
35 hours
45 hours
Monthly rainfall
111 mm (4.4 in)
116 mm (4.6 in)
112 mm (4.4 in)
Monthly rainy days
22 days
22 days
23 days
Weather conditions
poor
poor
poor
Climate in Ballyfarnon →

Strokestown

In December Strokestown generally has low temperatures with maximum daytime temperatures around 9°C (48°F), minimum nighttime temperatures around 3°C (37°F) and high 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
54 hours
35 hours
45 hours
Monthly rainfall
100 mm (3.9 in)
102 mm (4 in)
98 mm (3.9 in)
Monthly rainy days
20 days
21 days
22 days
Weather conditions
poor
poor
poor
Climate in Strokestown →

Castlerea

In December Castlerea generally has low temperatures with maximum daytime temperatures around 9°C (48°F), minimum nighttime temperatures around 3°C (37°F) and high 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
54 hours
35 hours
45 hours
Monthly rainfall
104 mm (4.1 in)
107 mm (4.2 in)
103 mm (4.1 in)
Monthly rainy days
21 days
22 days
22 days
Weather conditions
poor
poor
poor
Climate in Castlerea →

Is your destination not in the list? Have a look at all destinations in Roscommon 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 Roscommon County in December.

City Weather Day temp Night temp Rainfall
Boyle 9°C (48°F) 3°C (37°F) 113 mm (4.4 in)
Roscommon 9°C (48°F) 4°C (39°F) 100 mm (3.9 in)
Ballyfarnon 9°C (48°F) 3°C (37°F) 116 mm (4.6 in)
Strokestown 9°C (48°F) 3°C (37°F) 102 mm (4 in)
Castlerea 9°C (48°F) 3°C (37°F) 107 mm (4.2 in)

Roscommon County weather in December: frequently asked questions

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

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

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

Average temperatures in Roscommon County, Ireland during December range from a nighttime low near 3°C (37°F) to a daytime high around 9°C (48°F) in Boyle.

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

Roscommon County, Ireland sees substantial rainfall in December. Boyle typically averages about 113 mm (4.4 in), a mix of wet and dry days, but bring an umbrella.

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

Given the typically poor weather conditions in Boyle, December may not be the ideal time to visit Roscommon County, Ireland.

Generally speaking, May, June, July, August and September provide tolerable weather in Boyle. In contrast, January, February, November and December tend to have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in Roscommon 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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