Merthyr Tydfil, United Kingdom Weather

  1. Merthyr Tydfil, United Kingdom Weather
  2. Current conditions
  3. Weather forecast
  4. Averages and extremes
  5. Yesterday's Data
  6. Temperature and possibility of rain in Merthyr Tydfil over the next 12 hours
  7. Temperature and possibility of rain in Merthyr Tydfil in the coming days
  8. Rainfall in Merthyr Tydfil in the coming days
  9. Merthyr Tydfil Weather Summary
  10. Weather averages by month
  11. Merthyr Tydfil's weather
  12. Frequently asked questions
  13. Comments
Merthyr Tydfil, Weather
(Photo by Viktor Forgacs on Unsplash)

Current conditions

Updated:
5°C
41.0°F
°C °F

Condition: Drizzle

Pressure: 982 hPa

Feel like: 3 °C

Temperature: 5°C

Cloud: 100%

Humidity: 88%

Wind: SW - 3 km/h

Visibility: 28.92 km

Weather forecast

Sun
12 Apr
1°C / 8°C
Drizzle
Mon
13 Apr
0°C / 12°C
Mainly Clear
Tue
14 Apr
4°C / 12°C
Overcast
Wed
15 Apr
5°C / 12°C
Drizzle
Thu
16 Apr
5°C / 13°C
Drizzle
Hourly forecast today:
06:00 AM
3° / 5°
3° / 5°
Drizzle
88% 8 km/h
07:00 AM
3° / 5°
3° / 5°
Drizzle
86% 21 km/h
08:00 AM
2° / 6°
2° / 6°
Overcast
72% 32 km/h
09:00 AM
1° / 7°
1° / 7°
Overcast
65% 41 km/h
10:00 AM
0° / 7°
0° / 7°
Drizzle
63% 48 km/h
11:00 AM
0° / 7°
0° / 7°
Drizzle
65% 51 km/h
12:00 PM
0° / 6°
0° / 6°
Drizzle
65% 53 km/h
13:00 PM
0° / 6°
0° / 6°
Drizzle
62% 57 km/h
14:00 PM
-1° / 6°
-1° / 6°
Drizzle
57% 60 km/h
15:00 PM
-1° / 6°
-1° / 6°
Drizzle
56% 61 km/h
16:00 PM
0° / 6°
0° / 6°
Drizzle
61% 58 km/h

30 Day Averages and Extremes

  • Average high 12.1°C
  • Average low 4.83°C
  • Hottest day 22°C (07 April 2026)
  • Coldest day 0°C (13 April 2026)
  • Average humidity 76.53%
  • Days with precipitation 27 days
  • Highest precipitation 81 mm (02 April 2026)

Yesterday's Data

  • Max: 7°C
  • Min: 5°C
  • Total Precipitation: 3 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

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 5ºC to 8ºC (41.0ºF to 46.4ºF), you should wear:
- Layered clothing (such as a thermal shirt under a sweater)
- Scarf to protect the neck area
- Wool or thermal socks
- Warm jacket or medium-weight coat

Temperature

Early
7°C / 7°C
Morning
1°C / 7°C
Afternoon
-1°C / 6°C
Evening
3°C / 5°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 448
  • CO 144
  • NH3 1
  • NO2 3
  • O3 81
  • PM10 12
  • PM25 7
  • SO2 0
  • CH4 1,397

Sunrise / Sunset

05:23
19:05