Weather Merthyr Tydfil

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Day Weather Maximum Day Temperature Minimum Night Temperature Wind Direction and Speed
Sunday

Light Rain

10°C 50°F 10°C 50°F West South Westerly
21km/h 13mph
Monday

Heavy Rain

10°C 50°F 9°C 48°F West South Westerly
32km/h 20mph
Tuesday

Light Rain

10°C 50°F 6°C 43°F West South Westerly
31km/h 19mph
Wednesday

Sunny

8°C 46°F 3°C 37°F Westerly
21km/h 13mph
Thursday

Sunny Intervals

6°C 43°F 0°C 32°F West North Westerly
18km/h 11mph

IN ASSOCIATION WITH

Forecast

Sunrise 08:18 Sunset 16:05

Last updated 05:09

Weather forecast details for Sunday 21 December. Each column contains hourly forecast details for weather conditions, temperature, wind speed, wind direction, humidity, visibility and pressure.
Time 0900 hours1200 hours1500 hours1800 hours2100 hours0000 hours
Mon
0300 hours 
Weather Conditions Light Rain Light Rain Light Rain Light Rain Heavy Rain Light Rain Light Rain  
Temperature (°C/°F) 8°C 46°F 9°C 48°F 10°C 50°F 10°C 50°F 11°C 52°F 11°C 52°F 10°C 50°F  
Wind Speed (mph/km/h) 16km/h 10mph West South Westerly 21km/h 13mph West South Westerly 21km/h 13mph West South Westerly 21km/h 13mph West South Westerly 21km/h 13mph West South Westerly 23km/h 14mph West South Westerly 27km/h 17mph West South Westerly  
Wind Direction WSW WSW WSW WSW WSW WSW WSW  
Humidity 92% 93% 94% 93% 94% 96% 92%  
Visibility (E = Excellent, VG = Very Good, G = Good, M = Moderate, P = Poor, VP = Very Poor) G G M G M M M  
Pressure (Millibars) 1027 1025 1023 1022 1020 1019 1018  

Wales

Forecast Summary

  • Today

    Cloudy and mild with patchy rain. The rain will be mainly in the west where it could be persistent, and heavy at times, over the hills. Winds becoming strong, especially around coasts and hills.

  • Tonight

    Remaining mild by windy with local coastal gales likely. Patchy rain will become increasingly persistent, and heavy at times, particularly over the hills in the north and west.

Environmental Summary

UV: 1

UK Range: 1-7

Pollution: Low

UK Range: Low to Very High

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Forecast Video

BBC Wales Today

BBC Wales Today Forecast Last updated 19:06, Friday 19 Dec Forecast updated Monday to Friday only

UK

UK Forecast Last updated 23:08, Saturday 20 Dec

Observations

Observed at 05:00, Sunday 21 December

Light Rain Shower

8°C 46°F

34km/h 21mph Westerly

Humidity: 96%

Visibility: Good

Pressure: 1029mb, Falling

Observation station: Sennybridge

(Lat: 52.067 | Lon: -3.617)

BBC Weather in association with the Met Office

All times are GMT (Europe/London, GMT+0000) unless otherwise stated

Information given for most appropriate forecast location. See FAQs for details