Londonderry County Borough weather in July

In July, Londonderry County Borough sees average daytime highs of 17°C and overnight lows near 12°C, with 93 mm of rain across 16.8 wet days and about 16.5 hours of daylight. It is the 1st-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 17°C through the month. The sky is clear or mostly clear about 3% of the time in July, and the air most often feels dry.

Daylight stretches from about 17 hours at the start of July to 15 h 48 min by month's end. Set against the rest of the year, July is Londonderry County Borough's 12th-clearest and 12th-windiest month. For the whole year in context, see Londonderry County Borough's year-round climate.

Daytime high
17°
1st warmest
Overnight low
12°
12th coldest
Rainfall
93 mm
16.8 wet days
Daylight
16 h 36 min
4:18 AM – 8:52 PM
Cloud cover
83%
12th clearest
Wind
13 km/h
12th windiest
Solar energy
4.28 kWh/m²
Travel score
4.5
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 July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 17°C through the month.

A typical July day in Londonderry County Borough reaches about 17°C in the afternoon and slips back to 12°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 21°C. Set against its neighbours, July runs about 1°C warmer than June and on par with August.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11711
21711
31711
41711
51711
61711
71711
81711
91711
101711
111711
121711
131711
141712
151712
161812
171812
181812
191812
201812
211812
221812
231812
241812
251812
261812
271812
281812
291812
301812
311812

How July really feels in Londonderry County Borough

Once humidity and wind are folded in, July 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

July 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 July compares with the rest of the year at a glance. July is the 1st-warmest and 2nd-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 July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in July, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 9% of July, with mostly cloudy or overcast conditions the remaining 88%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11585
21585
31585
41585
51387
61387
71387
81288
91288
101288
111387
121288
131189
141189
151189
161189
171189
181189
191189
201189
211189
221189
231189
241189
251288
261189
271189
281090
291090
301090
311090

Chance of precipitation in July

Any precipitation

Londonderry County Borough gets around 93 mm of rain over 16.8 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 54% and peaks near 56% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
155
255
355
454
554
654
754
853
953
1053
1153
1252
1352
1452
1552
1652
1752
1852
1952
2053
2153
2254
2354
2455
2555
2656
2756
2856
2956
3056
3156

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the dry band about 72% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
182171
282171
381181
481181
579192
679192
779192
878202
978202
1077212
1177212
1275223
1375223
1474233
1573243
1672253
1771254
1870264
1969274
2068284
2167294
2267294
2366304
2466304
2565305
2664315
2764315
2864315
2964315
3065305
3166304

Wind in July

Winds average 13 km/h in July, the calmest month.

Across July, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in July

DaylightNight

Daylight runs from about 17 hours at the start of July to 15 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over July. Sunrise moves from 4:02 AM to 4:41 AM, and sunset from 9:03 PM to 8:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
117.04:029:03
217.04:029:03
317.04:039:03
417.04:049:02
516.94:059:02
616.94:069:01
716.94:079:00
816.94:089:00
916.84:098:59
1016.84:108:58
1116.84:118:57
1216.74:128:56
1316.74:148:55
1416.74:158:54
1516.64:168:53
1616.64:188:52
1716.54:198:51
1816.54:208:50
1916.44:228:48
2016.44:238:47
2116.34:258:46
2216.34:268:44
2316.24:288:43
2416.24:308:41
2516.14:318:40
2616.14:338:38
2716.04:348:36
2816.04:368:35
2915.94:388:33
3015.94:408:31
3115.84:418:29

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 4.28 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 — July's 4.28 kWh/m² sits near the top of that range.

012345151015202531
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.5Bright
54.4Bright
64.4Bright
74.4Bright
84.4Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.3Bright
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.3Bright
214.3Bright
224.2Bright
234.2Bright
244.2Bright
254.1Bright
264.1Bright
274.1Bright
284.1Bright
294.0Bright
304.0Bright
314.0Moderate
Planning a trip in July

Is July a good time to visit Londonderry County Borough?

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

4.5
Sightseeing
1st-best month of the year
Beach & pool
never really warm enough

July is a reasonable time to visit Londonderry County Borough for sightseeing.

What to pack for Londonderry County Borough in July

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

In July, Londonderry County Borough sees daytime highs around 17°C and nights near 12°C. Pack rain gear. About 17 days see rain.

rain gear

Sea temperature near Londonderry County Borough in July

The nearest coast averages about 14°C in July — 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 July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 5 — enough to warrant sun protection. 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
July 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).