Merthyr Tydfil weather in June

In June, Merthyr Tydfil sees average daytime highs of 17°C and overnight lows near 10°C, with 87 mm of rain across 12.9 wet days and about 16.3 hours of daylight. It is the 3rd-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 16°C in the first days to 18°C by the end. The sky is clear or mostly clear about 11% of the time in June, and the air most often feels dry.

Daylight stretches from about 16 h 06 min at the start of June to 16 h 24 min by month's end. Set against the rest of the year, June is Merthyr Tydfil's 5th-clearest and 10th-windiest month. For the whole year in context, see Merthyr Tydfil's year-round climate.

Daytime high
17°
3rd warmest
Overnight low
10°
10th coldest
Rainfall
87 mm
12.9 wet days
Daylight
16 h 24 min
4:01 AM – 8:26 PM
Cloud cover
73%
5th clearest
Wind
13 km/h
10th windiest
Solar energy
5.39 kWh/m²
Travel score
4.8
out of 10

Merthyr Tydfil is town in Wales.

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

Temperature in June

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 16°C in the first days to 18°C by the end.

A typical June day in Merthyr Tydfil reaches about 17°C in the afternoon and slips back to 10°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 21°C. Set against its neighbours, June runs about 3°C warmer than May and about 2°C cooler than July.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
1169
2169
3169
4169
5169
6169
7169
8169
9169
10169
111710
121710
131710
141710
151710
161710
171710
181710
191710
201710
211710
221710
231811
241811
251811
261811
271811
281811
291811
301811

How June really feels in Merthyr Tydfil

Once humidity and wind are folded in, June 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

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

Merthyr Tydfil weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 11215.31.78.10.6
Feb / 87121.89.60.7
Mar / 8013.31.311.51.5
Apr11° / 8113.20.513.62.6
May14° / 9014.2015.43.7
Jun17° / 10°8712.9016.34.8
Jul19° / 12°8914.30165.3
Aug18° / 12°9513.5014.45.3
Sep16° / 10°8311.7012.44.7
Oct13° / 12014.30.110.43.1
Nov / 11415.20.68.61.7
Dec / 12114.21.57.60.8

Cloud cover in June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in June.

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

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12872
22872
32872
42773
52773
62773
72674
82674
92674
102674
112674
122575
132476
142476
152476
162476
172575
182674
192674
202674
212674
222674
232773
242872
252872
262872
272872
282773
292773
302773

Chance of precipitation in June

Any precipitation

Merthyr Tydfil gets around 87 mm of rain over 12.9 wet days in June. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 44% and peaks near 46% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
146
246
346
446
546
646
746
846
946
1045
1145
1245
1344
1444
1543
1643
1742
1841
1941
2041
2141
2241
2341
2441
2542
2642
2743
2844
2944
3045

Humidity in June

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, June lands in the dry band about 86% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
19460
29460
39370
49370
59370
69280
79280
89190
99190
1090100
1190100
1288111
1387121
1487121
1586131
1686131
1785141
1885141
1984151
2084151
2183161
2283161
2382171
2481181
2581181
2680191
2779201
2878211
2976222
3076222

Wind in June

Winds average 13 km/h in June.

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

05101520151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light 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

Sunrise & sunset in June

DaylightNight

Daylight runs from about 16 h 06 min at the start of June to 16 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over June. Sunrise moves from 4:09 AM to 4:05 AM, and sunset from 8:13 PM to 8:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
116.14:098:13
216.14:088:14
316.14:078:16
416.24:068:17
516.24:068:18
616.24:058:19
716.34:048:20
816.34:048:20
916.34:038:21
1016.34:038:22
1116.34:038:23
1216.44:028:24
1316.44:028:24
1416.44:028:25
1516.44:018:26
1616.44:018:26
1716.44:018:27
1816.44:018:27
1916.44:018:28
2016.44:018:28
2116.44:018:28
2216.44:028:28
2316.44:028:29
2416.44:028:29
2516.44:028:29
2616.44:038:29
2716.44:038:29
2816.44:048:29
2916.44:048:29
3016.44:058:29

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 5.39 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 0.64 kWh/m² to a high of 5.39 kWh/m² in June across the year — June's 5.39 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.3Bright
125.4Bright
135.4Bright
145.4Bright
155.4Bright
165.4Bright
175.4Bright
185.4Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.5Bright
245.4Bright
255.4Bright
265.4Bright
275.4Bright
285.4Bright
295.4Bright
305.4Bright
Planning a trip in June

Is June a good time to visit Merthyr Tydfil?

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

4.8
Sightseeing
3rd-best month of the year
1.1
Beach & pool
3rd-best month of the year

June is a reasonable time to visit Merthyr Tydfil for sightseeing.

What to pack for Merthyr Tydfil in June

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

In June, Merthyr Tydfil sees daytime highs around 17°C and nights near 10°C. Worth packing: a warm layer, rain gear and sun protection. About 13 days see rain.

a warm layerrain gearsun protection

Sea temperature near Merthyr Tydfil in June

The nearest coast averages about 14°C in June — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 37 km away) is warmest in August at about 18°C and coldest in February near 8°C.

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

5°10°15°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan8Bracing
Feb8Bracing
Mar8Bracing
Apr9Bracing
May11Bracing
Jun14Bracing
Jul16Cool
Aug18Cool
Sep17Cool
Oct15Cool
Nov12Bracing
Dec10Bracing

UV index in Merthyr Tydfil in June

LowModerateHighVery highExtreme

Clear-sky midday UV in June peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Merthyr Tydfil peaks around August 13 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 13UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May6High
Jun6High
Jul6High
Aug7High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Merthyr Tydfil?

Merthyr Tydfil sits at 51.7°N, 3.4°W, 186 m above sea level, in United Kingdom. The nearest listed city is Aberdare, 6.0 km away.

Topography around Merthyr Tydfil

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

Within 3 km, the terrain around Merthyr Tydfil has significant variations in elevation — a maximum elevation change of 328 m around an average of 280 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 818 m; within 80 km, large variations in elevation — a maximum elevation change of 864 m.

The land around Merthyr Tydfil is covered by trees (41%), grassland (33%) and artificial surfaces (23%) within 3 km, grassland (58%) and trees (34%) within 16 km, and grassland (53%) within 80 km.

3 km
328 m
16 km
818 m
80 km
864 m
treesgrasslandcroplandartificial surfacesbare terrainwater
June weather nearby: Aberdare 6.0 km · Rhondda 11 km · Ebbw Vale 12 km · Gelligaer 13 km · Blackwood 15 km · Tonypandy 15 km · Pontypridd 16 km · Caerphilly 22 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 Merthyr Tydfil (51.7479°, -3.3778°, elevation 186 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).