Temperature
Cold by day, cold at night.
48°Ftypical December high
Typical range
December climate
December in Shannon
Ireland · Europe
Cold days.
Some tradeoffs
Daytime high
48°F
Lows around 40°F
Rain
Frequent rain
Sun
3.5 h/day
Air feel
Very dry
When to visit
Month-by-month fit
Best
Precipitation
Rain is frequent. About 16 wet days, the highest monthly average.
51%wet-day frequency
AmountWet-day chance
Sunshine
Sunshine is limited, with cloud often dominating.
3.4 hDecember sunshine
Heat & humidity by month
Humidity is rarely noticeable in the cool air.
Very dryDecember Heat feel
Easy airWarm airHumid air
Hourly temperature pattern
In December, afternoons feel about 39° and nights feel near 35°.
Very coldColdCoolNight hours
Clear sky
Mostly cloudy skies this month.
23%December Clear sky
Clear skyCloud
Wind pattern
Breezy December days can feel brisker in open spots.
10 mphDecember Breezy
More detailIncludes daypart comfort
Typical December day
December late afternoons are around 46°F, easing to about 44°F in early evening.
Avg temp Typical range
Morning44°F
Rain25%
Cloud79%
Humid airLow
Sun intensityMinimal
Midday46°F
Rain28%
Cloud78%
Humid airLow
Sun intensityMinimal
Late afternoon46°F
Rain26%
Cloud76%
Humid airLow
Sun intensityMinimal
Early evening44°F
Rain24%
Cloud76%
Humid airLow
Sun intensityMinimal
Best windowData tableView month-by-month numbers
View month-by-month numbers
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 47 | 39 | 3.6 | 15 | 4.0 | 88 |
| Feb | 49 | 39 | 3.4 | 14 | 5.4 | 85 |
| Mar | 51 | 40 | 3.1 | 13 | 6.9 | 82 |
| Apr | 55 | 42 | 2.8 | 13 | 9.2 | 79 |
| May | 60 | 47 | 3.1 | 15 | 10.1 | 79 |
| Jun | 64 | 51 | 3.1 | 13 | 9.9 | 79 |
| Jul | 66 | 55 | 3.2 | 14 | 8.8 | 82 |
| Aug | 65 | 54 | 3.6 | 16 | 8.4 | 83 |
| Sep | 63 | 51 | 3.2 | 13 | 7.0 | 85 |
| Oct | 57 | 47 | 4.0 | 15 | 5.5 | 87 |
| Nov | 51 | 42 | 4.1 | 16 | 4.2 | 89 |
| Dec | 48 | 40 | 4.1 | 16 | 3.4 | 89 |
Similar climates
Similar
Similar travel styleAachenGermanySimilar travel styleAberystwythUnited KingdomSimilar travel styleAlfeld (Leine)GermanySimilar travel styleAlmeloNetherlands
Want a side-by-side climate view? Compare Shannon with Aachen.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Aug 26, 2026
Data & methodology