Temperature
Cool by day, brisk at night.
51°Ftypical December high
Typical range
December climate
December in Alderney
Guernsey · Europe
Wind on exposed beaches is the main limitation.
Some tradeoffs
Daytime high
51°F
Lows around 47°F
Rain
Rain most days
Sun
4.5 h/day
Air feel
Very dry
Sea temp
53°F
Too cold for swimming
Wind
22 mph
Windy
When to visit
Month-by-month fit
Best
Precipitation
It rains on most days. About 18 wet days, the highest monthly average.
58%wet-day frequency
AmountWet-day chance
Sunshine
Sunshine is limited, with cloud often dominating.
4.5 hDecember sunshine
Heat & humidity by month
Humidity is rarely noticeable in the cool air.
Very dryDecember Heat feel
Hourly temperature pattern
In December, days and nights feel about the same, around 35°.
FreezingVery coldColdCoolNight hours
Clear sky
Mostly cloudy skies this month.
24%December Clear sky
Clear skyCloud
Wind pattern
Wind can affect exposed beach comfort.
22 mphDecember Windy
Sea temperature
53°FDecember sea temp
More detailIncludes daypart comfort
Typical December day
December stays around 49°F through the day and night.
Avg temp Typical range
Morning49°F
Rain33%
Cloud76%
Humid airLow
Sun intensityMinimal
Midday49°F
Rain32%
Cloud76%
Humid airLow
Sun intensityLow
Best windowLate afternoon49°F
Rain33%
Cloud76%
Humid airLow
Sun intensityMinimal
Early evening49°F
Rain34%
Cloud75%
Humid airLow
Sun intensityMinimal
Data tableView month-by-month numbers
View month-by-month numbers
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% | Sea°F |
|---|---|---|---|---|---|---|---|
| Jan | 49 | 45 | 4.2 | 16 | 4.7 | 78 | 50 |
| Feb | 48 | 45 | 3.1 | 14 | 6.3 | 79 | 49 |
| Mar | 49 | 46 | 2.5 | 12 | 8.2 | 80 | 49 |
| Apr | 50 | 47 | 1.9 | 9 | 10.8 | 81 | 51 |
| May | 54 | 51 | 1.8 | 9 | 11.9 | 84 | 54 |
| Jun | 58 | 55 | 1.7 | 8 | 12.8 | 86 | 58 |
| Jul | 61 | 59 | 1.5 | 8 | 12.7 | 87 | 61 |
| Aug | 63 | 60 | 2.0 | 9 | 11.4 | 85 | 64 |
| Sep | 62 | 59 | 2.2 | 9 | 9.9 | 80 | 63 |
| Oct | 59 | 56 | 4.5 | 16 | 7.2 | 79 | 60 |
| Nov | 54 | 51 | 5.4 | 18 | 5.5 | 77 | 56 |
| Dec | 51 | 47 | 5.2 | 18 | 4.5 | 78 | 53 |
Similar climates
Similar
Similar travel styleCapriItalySimilar travel styleSaint-TropezFranceSimilar travel stylePorto CervoItalySimilar travel styleAran IslandsIreland
Want a side-by-side climate view? Compare Alderney with Capri.
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: Jul 31, 2026
Data & methodology