Cahersiveen Weather in December
In Cahersiveen, December brings low daytime temperatures around 11°C (52°F), with nights cooling to 6°C (43°F). It is the wettest month of the year, so expect more rainfall than usual.
Rainfall in Cahersiveen in December
Known for its heavy rain, this month often brings intense downpours. Carrying a poncho is recommended to keep dry. Records from the past 30 years suggest around 24 days of rain, with 170 mm (6.7 in) average for the month. This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.
Temperature in Cahersiveen in December
December in Cahersiveen brings typical temperatures with highs around 11°C (52°F) and lows of 6°C (43°F). Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. With lows around 6°C (43°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Cahersiveen in December
This month is characterized by fewer sunny days, with about 40 hours of sunshine. It's great for those who appreciate cooler, less sunny days.
Wind Speed in Cahersiveen in December
December sees wind speeds averaging 6 m/s (12 knots). You'll experience strong winds that cause whole trees to sway and require effort when walking against them. As an average, expect variation from moderate breezes to particularly windy days that affect daily routines.
Average water temperature in December
With water temperatures around 11°C (52°F), swimming isn't really an option for most visitors. The cold sets in quickly and a wetsuit won't fully solve it.December in Cahersiveen has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Ireland, check out our Cahersiveen's climate page.
Cahersiveen Temperature in December
Min Temperature
6°C (43°F)
Max Temperature
11°C (52°F)
Water Temperature
11°C (52°F) *
Chance of Rain
80%
Precipitation
170 mm (6.7 in)
Rainy days
24 days
Humidity
80% *
Windspeed
6 m/s (12 knots) *
Sunshine
40 hours *
Percentage Sunshine
17% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Cahersiveen typically stay consistent throughout December, with daily highs averaging around 11°C (52°F). Nights are cold, with lows around 6°C (43°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Cahersiveen in December
Browse day-by-day weather records for Cahersiveen spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Cahersiveen historical weather extremes in December
Based on 49 years of weather observations in Cahersiveen between 1976 and 2025, these are the recorded extremes.
- Cahersiveen recorded its highest December temperature of 16°C (61°F) on December 9, 2025.
- Cahersiveen experienced its chilliest December day on December 21, 2010, reaching only 0°C (32°F).
- The coldest night in December in Cahersiveen was on December 22, 2010, with a minimum of -8°C (18°F).
- Peak precipitation in December occurred on December 2, 2005, when 54 mm (2.1 in) of precipitation was measured.
Best Places in Ireland in December
Find out more about the weather in Ireland and which places have the best travel conditions in this month. See all of Ireland in December →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Cahersiveen in December
The weather can be unpredictable in December, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. Also bring a poncho, it will rain a lot! Waterproof everything you can. The water temperature sits at about 11°C (52°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. You can probably leave your sunglasses at home, because sunny days are pretty rare this month.What To Do in Cahersiveen in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Ireland, check out our Cahersiveen's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Cahersiveen climate overview or explore weather in Ireland.
