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
10°C
°C
°F
Condition: Overcast
Pressure: 1,001 hPa
Feel like: 8 °C
Temperature: 10°C
Cloud: 86%
Humidity: 76%
Wind: SW - 4 km/h
Visibility: 11.62 km
Sun
08 Nov
3°C / 10°C
Overcast
Mon
09 Nov
4°C / 5°C
Fog
Tue
10 Nov
4°C / 8°C
Moderate Drizzle
Wed
11 Nov
7°C / 10°C
Drizzle
Thu
12 Nov
6°C / 9°C
Slight Rain
Hourly forecast today:
15:00 PM
6° / 10°
6° / 10°
Overcast
76%
10 km/h
16:00 PM
6° / 10°
6° / 10°
Overcast
79%
10 km/h
17:00 PM
7° / 8°
7° / 8°
Overcast
88%
5 km/h
18:00 PM
6° / 8°
6° / 8°
Partly Cloudy
90%
5 km/h
19:00 PM
6° / 7°
6° / 7°
Mainly Clear
91%
3 km/h
20:00 PM
5° / 6°
5° / 6°
Clear Sky
93%
8 km/h
21:00 PM
5° / 6°
5° / 6°
Mainly Clear
95%
8 km/h
22:00 PM
5° / 5°
5° / 5°
Mainly Clear
96%
4 km/h
23:00 PM
5° / 6°
5° / 6°
Partly Cloudy
96%
3 km/h
00:00 AM
5° / 5°
5° / 5°
Partly Cloudy
96%
5 km/h
01:00 AM
4° / 5°
4° / 5°
Overcast
96%
5 km/h
30 Day Averages and Extremes
- Average high 9.13°C
- Average low 5.03°C
- Hottest day 15°C (26 October 2026)
- Coldest day 0°C (14 November 2026)
- Average humidity 82.27%
- Days with precipitation 21 days
- Highest precipitation 79 mm (26 October 2026)
Yesterday's Data
- Max: 9°C
- Min: 6°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
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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 cool weather in Merthyr Tydfil, with temperatures between 7ºC to 10ºC (44.6ºF to 50.0ºF), you should consider wearing:
- Thin gloves (optional for early mornings or late evenings)
- Long-sleeve top or shirt
- Cotton socks
- Comfortable pants or jeans
Temperature
Early
7°C / 8°C
Morning
6°C / 8°C
Afternoon
6°C / 10°C
Evening
5°C / 6°C
Air quality
Moderate
Acceptable air quality, some pollutants present, minor health concerns for sensitive individuals
- CO2 449
- CO 211
- NH3 0
- NO2 9
- O3 43
- PM10 17
- PM25 16
- SO2 0
- CH4 1,446
Sunrise / Sunset
07:18
16:35