Larne weather in December

In December, Larne sees average daytime highs of 8°C and overnight lows near 5°C, with 109 mm of precipitation across 15.7 wet days and about 7 hours of daylight. It is the 9th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 8°C through the month. The sky is clear or mostly clear about 12% of the time in December, and the air most often feels dry.

Daylight stretches from about 7 h 24 min at the start of December to 7 hours by month's end. Set against the rest of the year, December is Larne's 11th-clearest and 2nd-windiest month. For the whole year in context, see Larne's year-round climate.

Daytime high
9th warmest
Overnight low
4th coldest
Precipitation
109 mm
15.7 wet days
Daylight
7 hours
8:50 AM – 3:48 PM
Cloud cover
75%
11th clearest
Wind
25 km/h
2nd windiest
Solar energy
0.46 kWh/m²
Travel score
1.2
out of 10

Larne is town in County Antrim, Northern Ireland, UK.

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 8°C through the month.

A typical December day in Larne reaches about 8°C in the afternoon and slips back to 5°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 5°C and 11°C. Set against its neighbours, December runs about 2°C cooler than November and on par with January.

10°15°151015202531
Avg high (°C)Avg low (°C)
196
296
396
496
596
696
796
896
996
1096
1196
1286
1386
1486
1585
1685
1785
1885
1985
2085
2185
2285
2385
2485
2585
2685
2785
2885
2985
3085
3185

How December really feels in Larne

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Larne weather by month

How December compares with the rest of the year at a glance. December is the 9th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 9917.20.87.60.9
Feb / 791419.30.9
Mar / 7614.60.711.41.2
Apr10° / 6813.40.213.81.8
May12° / 7213.5015.82.7
Jun14° / 11°8213.7016.93.5
Jul15° / 12°9415.4016.54.0
Aug16° / 13°9215.1014.74.2
Sep15° / 12°8613.8012.53.8
Oct12° / 10°11416.2010.22.8
Nov10° / 11317.30.18.11.8
Dec / 10915.70.471.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% 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 73%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12971
22971
32971
42971
52971
62872
72971
82971
92971
102971
112872
122773
132773
142773
152575
162575
172476
182476
192476
202476
212476
222575
232575
242575
252575
262674
272674
282773
292773
302773
312872

Chance of precipitation in December

Any precipitationSnow

Larne gets around 109 mm of rain and snow over 15.7 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 51% and peaks near 56% on the wettest days, and about 0 day brings snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1542
2542
3532
4532
5522
6512
7512
8502
9502
10492
11491
12491
13491
14481
15481
16481
17491
18491
19491
20501
21501
22501
23511
24521
25521
26531
27541
28541
29552
30552
31562

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 25 km/h in December.

Across December, daily wind ranges from about 24 km/h on the calmest days to 25 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
125breezy
225breezy
325breezy
425breezy
525breezy
625breezy
725breezy
825breezy
925breezy
1025breezy
1125breezy
1225breezy
1325breezy
1425breezy
1525breezy
1625breezy
1725breezy
1824breezy
1924breezy
2024breezy
2124breezy
2224breezy
2324breezy
2425breezy
2525breezy
2625breezy
2725breezy
2825breezy
2925breezy
3025breezy
3125breezy

Sunrise & sunset in December

DaylightNight

Daylight runs from about 7 h 24 min at the start of December to 7 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over December. Sunrise moves from 8:32 AM to 8:56 AM, and sunset from 3:54 PM to 3:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
17.48:323:54
27.38:343:53
37.38:353:52
47.28:373:51
57.28:383:51
67.28:403:50
77.28:413:50
87.18:423:50
97.18:433:49
107.18:453:49
117.18:463:49
127.08:473:49
137.08:483:48
147.08:493:48
157.08:503:48
167.08:503:48
177.08:513:49
186.98:523:49
196.98:533:49
206.98:533:49
216.98:543:50
226.98:543:50
236.98:553:51
246.98:553:51
256.98:553:52
266.98:563:53
277.08:563:53
287.08:563:54
297.08:563:55
307.08:563:56
317.08:563:57

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 0.46 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 0.46 kWh/m² to a high of 5.1 kWh/m² in June across the year — December's 0.46 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
10.6Dim
20.5Dim
30.5Dim
40.5Dim
50.5Dim
60.5Dim
70.5Dim
80.5Dim
90.5Dim
100.5Dim
110.5Dim
120.5Dim
130.5Dim
140.5Dim
150.5Dim
160.5Dim
170.5Dim
180.5Dim
190.4Dim
200.4Dim
210.4Dim
220.4Dim
230.4Dim
240.5Dim
250.5Dim
260.5Dim
270.5Dim
280.5Dim
290.5Dim
300.5Dim
310.5Dim
Planning a trip in December

Is December a good time to visit Larne?

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

1.2
Sightseeing
9th-best month of the year
Beach & pool
never really warm enough

December is a weaker month for outdoor sightseeing in Larne.

What to pack for Larne in December

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

In December, Larne sees daytime highs around 8°C and nights near 5°C. Pack a warm layer and rain gear. Worth having: a windbreaker. About 16 days see rain.

a warm layerrain geara windbreaker

Sea temperature near Larne in December

The nearest coast averages about 11°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 14°C and coldest in March near 8°C.

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

6°8°10°12°14°16°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan9Bracing
Feb8Bracing
Mar8Bracing
Apr8Bracing
May9Bracing
Jun11Bracing
Jul12Bracing
Aug13Bracing
Sep14Bracing
Oct14Bracing
Nov12Bracing
Dec11Bracing

UV index in Larne in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 0. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Larne peaks around May 22 at about 5 (high) — a little sun protection helps at midday. It bottoms out near January 1 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 5 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowMay 22UV 5Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Moderate
Apr3Moderate
May5High
Jun5High
Jul5High
Aug5Moderate
Sep3Moderate
Oct2Low
Nov1Low
Dec0Low
Location & terrain

Where is Larne?

Larne sits at 54.9°N, 5.8°W, 4 m above sea level, in United Kingdom. The nearest listed city is Carrickfergus, 15 km away.

Topography around Larne

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

Within 3 km, the terrain around Larne has only modest variations in elevation — a maximum elevation change of 141 m around an average of 44 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 473 m; within 80 km, large variations in elevation — a maximum elevation change of 841 m.

The land around Larne is covered by grassland (39%) and water (34%) within 3 km, water (47%) and grassland (45%) within 16 km, and water (50%) and grassland (41%) within 80 km.

3 km
141 m
16 km
473 m
80 km
841 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Carrickfergus 15 km · Newtownabbey 22 km · Bangor 23 km · Belfast 29 km · Antrim 29 km · Ballymena 29 km · Newtownards 30 km · Castlereagh 31 km

United Kingdom travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type D / G / M
230 V · 50 Hz
Prices
≈ 89% of US
price level, 2025
GDP per capita
$57,602
2025
Happiness
6.7 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
1.1
per 100k, 2021
Road deaths
3.2
per 100k/yr, 2019
Income group
High
World Bank
Religion
Christian 60%none 26%Muslim 4%other 2%

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 Larne (54.85°, -5.8167°, elevation 4 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).