Merthyr Tydfil, United Kingdom Weather
- Merthyr Tydfil, United Kingdom Weather
- Current conditions
- Weather forecast
- Averages and extremes
- Yesterday's Data
- Temperature and possibility of rain in Merthyr Tydfil over the next 12 hours
- Temperature and possibility of rain in Merthyr Tydfil in the coming days
- Rainfall in Merthyr Tydfil in the coming days
- Merthyr Tydfil Weather Summary
- Weather averages by month
- Merthyr Tydfil's weather
- Frequently asked questions
- Comments
Current conditions
Updated:
Overcast
19°C
°C
°F
Condition: Overcast
Pressure: 1,005 hPa
Feel like: 19 °C
Temperature: 19°C
Cloud: 100%
Humidity: 64%
Wind: SE - 4 km/h
Visibility: 26.08 km
Mon
22 Jun
17°C / 31°C
Slight Thunderstorm
Tue
23 Jun
17°C / 30°C
Slight Thunderstorm
Wed
24 Jun
20°C / 30°C
Slight Thunderstorm
Thu
25 Jun
16°C / 22°C
Moderate Drizzle
Fri
26 Jun
15°C / 19°C
Moderate Drizzle
Hourly forecast today:
09:00 AM
12° / 19°
12° / 19°
Overcast
64%
11 km/h
10:00 AM
13° / 20°
13° / 20°
Overcast
62%
12 km/h
11:00 AM
13° / 21°
13° / 21°
Overcast
61%
13 km/h
12:00 PM
14° / 22°
14° / 22°
Overcast
59%
16 km/h
13:00 PM
14° / 23°
14° / 23°
Partly Cloudy
58%
16 km/h
14:00 PM
14° / 24°
14° / 24°
Partly Cloudy
56%
17 km/h
15:00 PM
15° / 24°
15° / 24°
Partly Cloudy
55%
16 km/h
16:00 PM
15° / 25°
15° / 25°
Mainly Clear
54%
14 km/h
17:00 PM
14° / 25°
14° / 25°
Mainly Clear
53%
17 km/h
18:00 PM
14° / 24°
14° / 24°
Mainly Clear
53%
14 km/h
19:00 PM
15° / 24°
15° / 24°
Clear Sky
57%
13 km/h
30 Day Averages and Extremes
- Average high 18.03°C
- Average low 11.93°C
- Hottest day 31°C (22 June 2026)
- Coldest day 0°C (04 July 2026)
- Average humidity 75.1%
- Days with precipitation 22 days
- Highest precipitation 89 mm (16 June 2026)
Yesterday's Data
- Max: 25°C
- Min: 12°C
- Total Precipitation: 0 mm
Temperature and possibility of rain in Merthyr Tydfil over the next 12 hours
Temperature and possibility of rain in Merthyr Tydfil in the coming days
Rainfall in Merthyr Tydfil in the coming days
Merthyr Tydfil Climate Summary
Merthyr Tydfil features a Marine west coast, warm summer (Köppen classification: Cfb), with an average annual temperature of 10.04ºC (50.07ºF), which is about -0.71% lower than the national average for United Kingdom. Annually, the city experiences approximately 78.16 millimeters (3.08 inches) of rainfall, spread across 150.0 rainy days, accounting for 41.1% of the year.
| Longitude | 51.74873 |
| Latitude | -3.381646 |
| Yearly high temperature | 12.0ºC (53.6ºF) |
| Yearly low temperature | 6.39ºC (43.5ºF) |
| Hottest month | July 18.36ºC (65.05ºF) |
| Coldest month | December 3.47ºC (38.25ºF) |
| Yearly precip | 78.16mm (3.08in) |
| Days with rainfall | 150.0 days (41.1%) |
| Driest month | September (86.99%) |
| Wettest month | December (89.92%) |
Weather averages by month
| Month | High / Low (°C) | Rain |
|---|---|---|
| January | 6.06° / 2.22° | 13.82 days |
| February | 6.49° / 2.16° | 11.36 days |
| March | 8.68° / 2.8° | 10.91 days |
| April | 11.55° / 4.41° | 10.09 days |
| May | 14.05° / 6.85° | 11.82 days |
| June | 16.56° / 9.73° | 13.18 days |
| July | 18.36° / 11.43° | 12.55 days |
| August | 17.64° / 11.54° | 14.09 days |
| September | 15.96° / 9.6° | 10.27 days |
| October | 12.65° / 7.66° | 13.18 days |
| November | 8.9° / 4.86° | 14.18 days |
| December | 7.06° / 3.47° | 14.55 days |
Merthyr Tydfil's weather
- London
- Birmingham
- Liverpool
- Sheffield
- Leeds
- Glasgow City
- Manchester
- Leicester
- Bradford
- City of Bristol
- City of Edinburgh
- Cardiff
- Cornwall
- Ards and North Down
- Buckinghamshire
- Camden
- Cheshire East
- Clackmannanshire
- Central Bedfordshire
- Carmarthenshire
- Akrotiri
- Bath and North East Somerset
- Blackpool
- Denbighshire
- Solihull
- South Ayrshire
- Kirklees
- Inverclyde
- Knowsley
- Halton
- North Somerset
- Luton
- Neath Port Talbot
- Nottingham
- Rotherham
- Hillingdon
- Nottinghamshire
- Hammersmith and Fulham
- Hackney
- Hounslow
- Lewisham
- Durham County
- Haringey
- Derbyshire
- Darlington
- Hartlepool
- Greenwich
- Isle of Wight
- Northumberland
- Dumfries and Galloway
- Harrow
- Dhekelia
- Essex
- Northamptonshire
- Derry City and Strabane
- Medway
- Renfrewshire
- East Riding of Yorkshire
- Salford
- Falkirk
- Hertfordshire
- Isles of Scilly
- Herefordshire
- Kingston upon Hull
- Lancashire
- Doncaster
- Gwynedd
- East Lothian
- Lisburn and Castlereagh
- Portsmouth
- Mid and East Antrim
- Middlesbrough
- Monmouthshire
- Newport
- Newham
- Norfolk
- North Tyneside
- Orkney Islands
- Reading
- Redcar and Cleveland
- Rochdale
- Moray
- Perth and Kinross
- Leicestershire
- Slough
- Rutland
- Shropshire
- East Dunbartonshire
- South Gloucestershire
- Sefton
- Dorset
- York
- Suffolk
- Telford and Wrekin
- Wiltshire
- South Tyneside
- Wirral
- Westminster
- Warrington
- Wakefield
- Tameside
- Stoke-on-Trent
- Sunderland
- Sutton
- Stirling
- Swansea
- Swindon
- Torbay
- Warwickshire
- West Berkshire
- Stockport
- West Sussex
- Wokingham
- Trafford
- Worcestershire
- Waltham Forest
- North East Lincolnshire
- Scottish Borders
- Bromley
- Wolverhampton
- Somerset
- Aberdeen City
- Southampton
- Barking and Dagenham
- Brighton and Hove
- Dudley
- Conwy
- Cheshire West and Chester
- Hampshire
- Kent
- Newry, Mourne and Down
- Milton Keynes
- North Ayrshire
- Rhondda, Cynon, Taf
- Southend-on-Sea
- Stockton-on-Tees
- West Lothian
- Southwark
- Staffordshire
- Vale of Glamorgan
- Sandwell
- Shetland Islands
- Barnsley
- Dundee City
- Newcastle upon Tyne
- Armagh City, Banbridge and Craigavon
- Torfaen
- Antrim and Newtownabbey
- Oxfordshire
- West Dunbartonshire
- East Ayrshire
- Oldham
- Gateshead
- Blaenau Gwent
- Devon
- Thurrock
- Fife
- Walsall
- Bournemouth
- Bury
- Tower Hamlets
- Powys
- Caerphilly
- Croydon
- Aberdeenshire
- East Sussex
- Cumbria
- Derby
- Ealing
- St. Helens
- East Renfrewshire
- Wandsworth
- Enfield
- Bridgend
- Wigan
- Fermanagh and Omagh
- Havering
- Isle of Anglesey
- Islington
- Lambeth
- Angus
- Peterborough
- Bracknell Forest
- Lincolnshire
- Kingston upon Thames
- Merton
- Wrexham
- Mid Ulster
- Midlothian
- Na h-Eileanan an Iar
- Bedford
- Plymouth
- North Lincolnshire
- Highland
- Poole
- Redbridge
- Richmond upon Thames
- Flintshire
- North Yorkshire
- North Lanarkshire
- Pembrokeshire
- Bolton
- South Lanarkshire
- Gloucestershire
- Kensington and Chelsea
- Surrey
- Windsor and Maidenhead
- Argyll and Bute
- Belfast
- Brent
- Cambridgeshire
- Causeway Coast and Glens
- Ceredigion
- Barnet
- Coventry
- Blackburn with Darwen
- Calderdale
- Bexley
Frequently asked questions
1. What is the hottest month in Merthyr Tydfil?
July has the highest average monthly temperature (daily mean of 18.36ºC) and December are the coolest (daily mean of 3.47ºC).
2. What should I wear in Merthyr Tydfil today?
For today's very hot weather in Merthyr Tydfil, with the high temperatures above 30ºC (86.0ºF), consider wearing:
- Light, natural fabrics (like cotton or linen)
- Airy sandals or flip-flops
- Lightweight, loose-fitting shorts
- High SPF sunscreen for outdoor activities
Temperature
Early
11°C / 13°C
Morning
12°C / 19°C
Afternoon
15°C / 24°C
Evening
15°C / 22°C
Air quality
Good
Satisfactory air quality, minimal pollution, low risk
- CO2 426
- CO 114
- NH3 1
- NO2 1
- O3 58
- PM10 5
- PM25 3
- SO2 0
- CH4 1,384
Sunrise / Sunset
03:55
20:36