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
7°C
°C
°F
Condition: Overcast
Pressure: 1,002 hPa
Feel like: 5 °C
Temperature: 7°C
Cloud: 88%
Humidity: 93%
Wind: ENE - 4 km/h
Visibility: 15.18 km
Sat
07 Nov
5°C / 10°C
Overcast
Sun
08 Nov
4°C / 9°C
Fog
Mon
09 Nov
4°C / 6°C
Fog
Tue
10 Nov
4°C / 8°C
Drizzle Dense Intensity
Wed
11 Nov
6°C / 10°C
Drizzle Dense Intensity
Hourly forecast today:
20:00 PM
6° / 7°
6° / 7°
Overcast
93%
12 km/h
21:00 PM
6° / 7°
6° / 7°
Partly Cloudy
93%
10 km/h
22:00 PM
4° / 5°
4° / 5°
Clear Sky
94%
7 km/h
23:00 PM
5° / 6°
5° / 6°
Mainly Clear
94%
11 km/h
00:00 AM
4° / 5°
4° / 5°
Mainly Clear
95%
9 km/h
01:00 AM
5° / 6°
5° / 6°
Partly Cloudy
95%
8 km/h
02:00 AM
5° / 5°
5° / 5°
Partly Cloudy
95%
5 km/h
03:00 AM
5° / 5°
5° / 5°
Overcast
96%
8 km/h
04:00 AM
5° / 6°
5° / 6°
Overcast
95%
7 km/h
05:00 AM
5° / 6°
5° / 6°
Overcast
94%
9 km/h
06:00 AM
5° / 6°
5° / 6°
Overcast
94%
9 km/h
30 Day Averages and Extremes
- Average high 9.23°C
- Average low 4.6°C
- Hottest day 15°C (26 October 2026)
- Coldest day 0°C (17 November 2026)
- Average humidity 81.67%
- Days with precipitation 22 days
- Highest precipitation 79 mm (26 October 2026)
Yesterday's Data
- Max: 7°C
- Min: 7°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 6ºC to 9ºC (42.8ºF to 48.2ºF), you should wear:
- Hat and gloves, particularly for early mornings or evenings
- Layered clothing (such as a thermal shirt under a sweater)
- Long pants (jeans or other thick materials)
- Closed-toe shoes or boots
Temperature
Early
5°C / 7°C
Morning
5°C / 7°C
Afternoon
7°C / 8°C
Evening
6°C / 7°C
Air quality
Moderate
Acceptable air quality, some pollutants present, minor health concerns for sensitive individuals
- CO2 456
- CO 230
- NH3 1
- NO2 17
- O3 24
- PM10 27
- PM25 24
- SO2 2
- CH4 1,507
Sunrise / Sunset
07:16
16:37