As of 19:14 BST

Weather in Merthyr Dyfan

+24°Weather now

Merthyr Dyfan, Saturday, 8 August, 19:14

Overcast. Feels like 24°C. High 26°C, low 10°C.

Pressure1016 mb
Wind7 mph W
Humidity43%
Visibility6.2 mi
Dew point11°C
Sun, 09+12 ° /25 °0Partly cloudy
+25 °Partly cloudy

Merthyr Dyfan, Sunday, 9 August

Partly cloudy. High 25°C, low 12°C.

Pressure1015 mb
Wind14 mph W
Humidity48%
Visibility6.2 mi
Dew point9°C
Mon, 10+12 ° /24 °0Overcast
+24 °Overcast

Merthyr Dyfan, Monday, 10 August

Overcast. High 24°C, low 12°C.

Pressure1020 mb
Wind9 mph W
Humidity55%
Visibility6.2 mi
Dew point11°C
Tue, 11+14 ° /28 °0Clear sky
+28 °Clear sky

Merthyr Dyfan, Tuesday, 11 August

Clear sky. High 28°C, low 14°C.

Pressure1024 mb
Wind7 mph E
Humidity50%
Visibility6.2 mi
Dew point12°C
Wed, 12+15 ° /30 °0Overcast
+30 °Overcast

Merthyr Dyfan, Wednesday, 12 August

Overcast. High 30°C, low 15°C.

Pressure1022 mb
Wind8 mph E
Humidity37%
Visibility6.2 mi
Dew point9°C
Thu, 13+18 ° /28 °0Clear sky
+28 °Clear sky

Merthyr Dyfan, Thursday, 13 August

Clear sky. High 28°C, low 18°C.

Pressure1017 mb
Wind20 mph W
Humidity33%
Visibility—
Dew point9°C
Fri, 14+17 ° /23 °0Overcast
+23 °Overcast

Merthyr Dyfan, Friday, 14 August

Overcast. High 23°C, low 17°C.

Pressure1017 mb
Wind18 mph W
Humidity69%
Visibility—
Dew point16°C
Sat, 15+16 ° /23 °0Overcast
+23 °Overcast

Merthyr Dyfan, Saturday, 15 August

Overcast. High 23°C, low 16°C.

Pressure1017 mb
Wind10 mph NW
Humidity60%
Visibility—
Dew point14°C
Sun, 16+16 ° /20 °0Overcast
+20 °Overcast

Merthyr Dyfan, Sunday, 16 August

Overcast. High 20°C, low 16°C.

Pressure1015 mb
Wind17 mph W
Humidity62%
Visibility—
Dew point12°C
Mon, 17+16 ° /21 °0.3Light rain
+21 °Light rain

Merthyr Dyfan, Monday, 17 August

Light rain. High 21°C, low 16°C.

Pressure1013 mb
Wind16 mph NW
Humidity57%
Visibility—
Dew point11°C
Tue, 18+13 ° /19 °0Partly cloudy
+19 °Partly cloudy

Merthyr Dyfan, Tuesday, 18 August

Partly cloudy. High 19°C, low 13°C.

Pressure1011 mb
Wind18 mph NW
Humidity59%
Visibility—
Dew point10°C
Wed, 19+13 ° /20 °0Partly cloudy
+20 °Partly cloudy

Merthyr Dyfan, Wednesday, 19 August

Partly cloudy. High 20°C, low 13°C.

Pressure1014 mb
Wind20 mph W
Humidity55%
Visibility—
Dew point10°C
Thu, 20+15 ° /20 °1.8Light rain
+20 °Light rain

Merthyr Dyfan, Thursday, 20 August

Light rain. High 20°C, low 15°C.

Pressure1007 mb
Wind23 mph W
Humidity74%
Visibility—
Dew point14°C
Fri, 21+12 ° /19 °0Overcast
+19 °Overcast

Merthyr Dyfan, Friday, 21 August

Overcast. High 19°C, low 12°C.

Pressure1015 mb
Wind20 mph W
Humidity52%
Visibility—
Dew point8°C
Sat, 22+13 ° /19 °0.9Light rain
+19 °Light rain

Merthyr Dyfan, Saturday, 22 August

Light rain. High 19°C, low 13°C.

Pressure1015 mb
Wind27 mph W
Humidity64%
Visibility—
Dew point11°C
Sun, 23+11 ° /19 °0Overcast
+19 °Overcast

Merthyr Dyfan, Sunday, 23 August

Overcast. High 19°C, low 11°C.

Pressure1023 mb
Wind18 mph NW
Humidity45%
Visibility—
Dew point6°C

Questions about the month ahead

How accurate is a month-long forecast?

The first 16 days come from weather models — highly reliable for the first 3–5 days, gradually less so after that. Days 17 to 30 for Merthyr Dyfan are built from climate averages over the last 60 years, so they show typical weather for those dates rather than a specific forecast.

What does "above average" mean?

We compare the forecast with the climate average for exactly the same calendar days, calculated from 60 years of observations. The difference shows how the coming month compares with a typical one.

Where do the 66-year records come from?

These are real historical extremes recorded in Merthyr Dyfan since 1960: the highest and lowest temperature for each calendar date, with the year it happened.

How often is the 30-day forecast updated?

The forecast portion refreshes every hour. The climate portion is based on long-term data and stays stable.