Londonderry County Borough weather in October

In October, Londonderry County Borough sees average daytime highs of 13°C and overnight lows near 8°C, with 88 mm of precipitation across 15.5 wet days and about 10.2 hours of daylight. It is the 6th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 14°C in the first days to 11°C by the end. The sky is clear or mostly clear about 5% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 18 min at the start of October to 9 h 06 min by month's end. Set against the rest of the year, October is Londonderry County Borough's 5th-clearest and 6th-windiest month. For the whole year in context, see Londonderry County Borough's year-round climate.

Daytime high
13°
6th warmest
Overnight low
8th coldest
Precipitation
88 mm
15.5 wet days
Daylight
10 h 12 min
7:10 AM – 5:19 PM
Cloud cover
79%
5th clearest
Wind
16 km/h
6th windiest
Solar energy
1.47 kWh/m²
Travel score
2.9
out of 10

Londonderry County Borough is city in Northern Ireland.

Density
225/km²
people per km²
Founded
~501 CE

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

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 14°C in the first days to 11°C by the end.

A typical October day in Londonderry County Borough reaches about 13°C in the afternoon and slips back to 8°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 15°C. Set against its neighbours, October runs about 3°C cooler than September and about 3°C warmer than November.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
1149
2149
3149
4149
5149
6149
7148
8138
9138
10138
11138
12138
13138
14138
15138
16138
17128
18127
19127
20127
21127
22127
23127
24127
25127
26117
27117
28117
29117
30117
31116

How October really feels in Londonderry County Borough

Once humidity and wind are folded in, October 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

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

Londonderry County Borough weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 8716.427.50.8
Feb / 7514.91.99.31.0
Mar / 7515.61.211.41.6
Apr11° / 7415.40.313.82.4
May14° / 7815.10.115.83.4
Jun16° / 10°8715.50174.1
Jul17° / 12°9316.8016.54.5
Aug17° / 12°9416.7014.74.5
Sep16° / 10°7514.2012.54.1
Oct13° / 8815.50.110.22.9
Nov10° / 9016.70.38.11.6
Dec / 9015.81.271.0

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 5% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 15% of October, with mostly cloudy or overcast conditions the remaining 80%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12080
22080
32080
41981
51981
62179
72179
82179
92179
102278
112278
122278
132278
142278
152278
162179
172179
182278
192278
202278
212080
222080
232080
242080
252080
262080
272080
282080
291981
301981
311981

Chance of precipitation in October

Any precipitation

Londonderry County Borough gets around 88 mm of rain and snow over 15.5 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 50% and peaks near 55% on the wettest days, and about 0 day brings snow. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
148
248
348
448
548
648
747
847
947
1047
1147
1247
1347
1447
1547
1648
1748
1849
1950
2050
2151
2252
2352
2453
2553
2653
2754
2854
2955
3055
3155

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the dry band about 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1937
2946
3946
4955
5955
6964
7964
8973
9973
10982
11982
12982
13982
14991
15991
16991
17991
18991
19991
20991
21991
22991
23991
24991
25991
26991
27991
28991
29991
30991
31991

Wind in October

Winds average 16 km/h in October.

Across October, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze
3117light breeze

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 18 min at the start of October to 9 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 132 minutes over October. Sunrise moves from 6:40 AM to 7:41 AM, and sunset from 5:57 PM to 4:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.36:405:57
211.26:415:54
311.16:435:52
411.16:455:49
511.06:475:47
610.96:495:44
710.86:515:41
810.86:535:39
910.76:555:36
1010.66:575:34
1110.56:595:31
1210.57:015:29
1310.47:035:26
1410.37:065:24
1510.27:085:21
1610.27:105:19
1710.17:125:17
1810.07:145:14
199.97:165:12
209.97:185:09
219.87:205:07
229.77:225:05
239.67:245:02
249.67:265:00
259.57:284:58
269.47:304:56
279.47:324:54
289.37:344:51
299.27:364:49
309.17:384:47
319.17:414:45

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 1.47 kWh/m².

For context, solar energy here swings from a low near 0.42 kWh/m² to a high of 4.84 kWh/m² in May across the year — October's 1.47 kWh/m² falls in the middle.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
12.0Dim
21.9Dim
31.9Dim
41.8Dim
51.8Dim
61.8Dim
71.7Dim
81.7Dim
91.7Dim
101.6Dim
111.6Dim
121.6Dim
131.6Dim
141.5Dim
151.5Dim
161.5Dim
171.4Dim
181.4Dim
191.4Dim
201.4Dim
211.3Dim
221.3Dim
231.3Dim
241.2Dim
251.2Dim
261.2Dim
271.1Dim
281.1Dim
291.1Dim
301.1Dim
311.0Dim
Planning a trip in October

Is October a good time to visit Londonderry County Borough?

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

2.9
Sightseeing
6th-best month of the year
Beach & pool
never really warm enough

October is a weaker month for outdoor sightseeing in Londonderry County Borough.

What to pack for Londonderry County Borough in October

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

In October, Londonderry County Borough sees daytime highs around 13°C and nights near 8°C. Pack rain gear. Worth having: a warm layer. About 16 days see rain.

rain geara warm layer

Sea temperature near Londonderry County Borough in October

The nearest coast averages about 13°C in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 42 km away) is warmest in August at about 15°C and coldest in February near 8°C.

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

10°15°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan9Bracing
Feb8Bracing
Mar8Bracing
Apr9Bracing
May10Bracing
Jun12Bracing
Jul14Bracing
Aug15Bracing
Sep14Bracing
Oct13Bracing
Nov12Bracing
Dec10Bracing

UV index in Londonderry County Borough in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Londonderry County Borough peaks around July 13 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 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 13UV 5Jan 1UV 0
UV index (midday)Level
Jan0Low
Feb1Low
Mar2Moderate
Apr3Moderate
May5High
Jun5Moderate
Jul5High
Aug5Moderate
Sep3Moderate
Oct2Low
Nov1Low
Dec0Low
Location & terrain

Where is Londonderry County Borough?

Londonderry County Borough sits at 55.0°N, 7.3°W, 24 m above sea level, in United Kingdom. The nearest listed city is Derry, 0.0 km away.

BallymenaAntrimPortadownCraigavon

Topography around Londonderry County Borough

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

Within 3 km, the terrain around Londonderry County Borough has only modest variations in elevation — a maximum elevation change of 192 m around an average of 47 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 481 m; within 80 km, large variations in elevation — a maximum elevation change of 706 m.

The land around Londonderry County Borough is covered by artificial surfaces (31%), grassland (30%) and trees (27%) within 3 km, grassland (65%) within 16 km, and grassland (57%) and water (34%) within 80 km.

3 km
192 m
16 km
481 m
80 km
706 m
treesgrasslandcroplandartificial surfaceswater
October weather nearby: Derry 0.0 km · Letterkenny 28 km · Coleraine 44 km · Omagh 44 km · Ballymena 68 km · Antrim 77 km · Portadown 85 km · Craigavon 85 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 Londonderry County Borough (54.9972°, -7.3092°, elevation 24 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).