Saint Peter Port weather in December

In December, Saint Peter Port sees average daytime highs of 11°C and overnight lows near 9°C, with 121 mm of precipitation across 17 wet days and about 8 hours of daylight. It is the 8th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 11°C through the month. The sky is clear or mostly clear about 10% of the time in December, and the air most often feels dry.

Daylight stretches from about 8 h 18 min at the start of December to 8 hours by month's end. Set against the rest of the year, December is Saint Peter Port's 11th-clearest and 1st-windiest month. For the whole year in context, see Saint Peter Port's year-round climate.

Daytime high
11°
8th warmest
Overnight low
4th coldest
Precipitation
121 mm
17 wet days
Daylight
8 hours
8:07 AM – 4:05 PM
Cloud cover
75%
11th clearest
Wind
35 km/h
1st windiest
Solar energy
0.8 kWh/m²
Travel score
2.2
out of 10

Saint Peter Port is parish, port, and capital of Guernsey in the Channel Islands.

Density
2,537/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 11°C through the month.

A typical December day in Saint Peter Port reaches about 11°C in the afternoon and slips back to 9°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 13°C. Set against its neighbours, December runs about 2°C cooler than November and about 1°C warmer than January.

10°15°151015202531
Avg high (°C)Avg low (°C)
11210
21210
31210
41110
5119
6119
7119
8119
9119
10119
11119
12119
13119
14119
15119
16119
17119
18119
19119
20119
21119
22119
23119
24119
25118
26118
27108
28108
29108
30108
31108

Saint Peter Port weather by month

How December compares with the rest of the year at a glance. December is the 8th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan10° / 9815.78.41.8
Feb / 7413.39.81.7
Mar10° / 5811.511.52.0
Apr11° / 509.713.42.6
May13° / 11°457.915.13.6
Jun15° / 13°427.5164.7
Jul17° / 15°366.915.65.7
Aug17° / 16°508.614.25.9
Sep17° / 15°579.412.45.5
Oct15° / 14°1071510.54.1
Nov13° / 11°12117.78.92.8
Dec11° / 1211782.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 74%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12971
22971
32971
42971
52971
62872
72872
82872
92773
102773
112674
122674
132575
142575
152377
162377
172377
182377
192377
202377
212377
222476
232476
242476
252476
262476
272476
282476
292575
302575
312575

Chance of precipitation in December

Any precipitation

Saint Peter Port gets around 121 mm of rain and snow over 17 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 55% and peaks near 59% on the wettest days, and about 0 day brings snow.

0%20%40%60%151015202531
Rain chance (%)
159
258
357
457
556
655
754
854
953
1053
1153
1253
1353
1453
1554
1654
1754
1855
1955
2055
2155
2256
2356
2456
2555
2655
2755
2854
2954
3054
3154

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in December

Winds average 35 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 34 km/h on the calmest days to 35 km/h at its breeziest. It stays fairly steady from day to day.

010203040151015202531
Wind speed (km/h)Feels
134windy
234windy
334windy
435windy
535windy
635windy
735windy
835windy
935windy
1035windy
1135windy
1235windy
1335windy
1435windy
1535windy
1635windy
1735windy
1835windy
1935windy
2035windy
2135windy
2235windy
2335windy
2435windy
2535windy
2635windy
2735windy
2835windy
2935windy
3035windy
3135windy

Sunrise & sunset in December

DaylightNight

Daylight runs from about 8 h 18 min at the start of December to 8 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over December. Sunrise moves from 7:52 AM to 8:13 AM, and sunset from 4:08 PM to 4:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.37:524:08
28.27:534:07
38.27:554:07
48.27:564:06
58.17:574:06
68.17:584:06
78.17:594:05
88.18:004:05
98.18:014:05
108.08:024:05
118.08:034:05
128.08:044:05
138.08:054:05
148.08:064:05
158.08:074:05
168.08:074:05
178.08:084:05
188.08:094:06
197.98:094:06
207.98:104:06
217.98:104:07
227.98:114:07
237.98:114:08
247.98:124:08
257.98:124:09
268.08:124:10
278.08:134:10
288.08:134:11
298.08:134:12
308.08:134:12
318.08:134:13

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 0.8 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 0.8 kWh/m² to a high of 6.39 kWh/m² in June across the year — December's 0.8 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
10.9Dim
20.9Dim
30.9Dim
40.9Dim
50.9Dim
60.9Dim
70.8Dim
80.8Dim
90.8Dim
100.8Dim
110.8Dim
120.8Dim
130.8Dim
140.8Dim
150.8Dim
160.8Dim
170.8Dim
180.8Dim
190.8Dim
200.8Dim
210.8Dim
220.8Dim
230.8Dim
240.8Dim
250.8Dim
260.8Dim
270.8Dim
280.8Dim
290.8Dim
300.8Dim
310.8Dim
Planning a trip in December

Hazard calendar for Saint Peter Port

In seasonPeak

In December, Saint Peter Port sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Saint Peter Port's rainy season runs September–March, when most of the year's rain falls.

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

Is December a good time to visit Saint Peter Port?

Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

2.2
Sightseeing
9th-best month of the year
0.0
Beach & pool
7th-best month of the year

December is a weaker month for outdoor sightseeing in Saint Peter Port.

What to pack for Saint Peter Port in December

From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In December, Saint Peter Port sees daytime highs around 11°C and nights near 9°C. Pack a warm layer, rain gear and a windbreaker. About 17 days see rain.

a warm layerrain geara windbreaker

Sea temperature near Saint Peter Port in December

The nearest coast averages about 12°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in September at about 17°C and coldest in March near 9°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

10°15°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan10Bracing
Feb10Bracing
Mar9Bracing
Apr10Bracing
May12Bracing
Jun14Bracing
Jul16Cool
Aug17Cool
Sep17Cool
Oct16Cool
Nov14Bracing
Dec12Bracing

UV index in Saint Peter Port in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 1. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Saint Peter Port peaks around August 12 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowAug 12UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr5Moderate
May6High
Jun6High
Jul6High
Aug7High
Sep5Moderate
Oct3Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Saint Peter Port?

Saint Peter Port sits at 49.5°N, 2.5°W, 10 m above sea level, in Guernsey. The nearest listed city is Saint Helier, 43 km away.

Topography around Saint Peter Port

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Saint Peter Port.

Within 3 km, the terrain around Saint Peter Port has only modest variations in elevation — a maximum elevation change of 105 m around an average of 24 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 108 m; within 80 km, only modest variations in elevation — a maximum elevation change of 191 m.

The land around Saint Peter Port is covered by water (41%) and trees (25%) within 3 km, water (91%) within 16 km, and water (88%) within 80 km.

3 km
105 m
16 km
108 m
80 km
191 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Saint Helier 43 km · Octeville 67 km · Équeurdreville-Hainneville 67 km · Cherbourg 69 km · Tourlaville 73 km · Saint-Malo 98 km · Lannion 105 km · Saint-Brieuc 106 km

Guernsey travel facts

Power plugs
Type G
230 V · 50 Hz

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Saint Peter Port (49.4598°, -2.5353°, elevation 10 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).