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:
Clear Sky
2°C
°C
°F
Condition: Clear Sky
Pressure: 996 hPa
Feel like: 0 °C
Temperature: 2°C
Cloud: 0%
Humidity: 95%
Wind: NNE - 1 km/h
Visibility: 4.46 km
Tue
10 Nov
5°C / 7°C
Moderate Drizzle
Wed
11 Nov
5°C / 8°C
Drizzle
Thu
12 Nov
3°C / 5°C
Overcast
Fri
13 Nov
0°C / 6°C
Overcast
Sat
14 Nov
-1°C / 8°C
Overcast
Hourly forecast today:
03:00 AM
1° / 2°
1° / 2°
Clear Sky
95%
8 km/h
04:00 AM
2° / 2°
2° / 2°
Clear Sky
96%
11 km/h
05:00 AM
3° / 3°
3° / 3°
Clear Sky
95%
16 km/h
06:00 AM
2° / 2°
2° / 2°
Clear Sky
97%
12 km/h
07:00 AM
2° / 3°
2° / 3°
Clear Sky
97%
14 km/h
08:00 AM
3° / 4°
3° / 4°
Overcast
95%
19 km/h
09:00 AM
4° / 5°
4° / 5°
Overcast
90%
16 km/h
10:00 AM
5° / 6°
5° / 6°
Overcast
90%
27 km/h
11:00 AM
5° / 7°
5° / 7°
Overcast
89%
27 km/h
12:00 PM
5° / 7°
5° / 7°
Mainly Clear
86%
31 km/h
13:00 PM
5° / 7°
5° / 7°
Overcast
86%
34 km/h
30 Day Averages and Extremes
- Average high 8.83°C
- Average low 4.63°C
- Hottest day 15°C (26 October 2026)
- Coldest day -1°C (14 November 2026)
- Average humidity 82.03%
- Days with precipitation 19 days
- Highest precipitation 79 mm (26 October 2026)
Yesterday's Data
- Max: 10°C
- Min: 3°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 cold weather in Merthyr Tydfil, with temperatures ranging from 4ºC to 7ºC (39.2ºF to 44.6ºF), you should wear:
- Wool or thermal socks
- Layered clothing (such as a thermal shirt under a sweater)
- Closed-toe shoes or boots
- Warm jacket or medium-weight coat
Temperature
Early
1°C / 2°C
Morning
4°C / 5°C
Afternoon
5°C / 7°C
Evening
4°C / 5°C
Air quality
Moderate
Acceptable air quality, some pollutants present, minor health concerns for sensitive individuals
- CO2 450
- CO 200
- NH3 0
- NO2 6
- O3 39
- PM10 19
- PM25 17
- SO2 0
- CH4 1,458
Sunrise / Sunset
07:21
16:32