As of 19:40 BST

Weather in Merthyr

+9°Weather now

Merthyr, Wednesday, 7 October, 19:40

Partly cloudy. Feels like 7°C. High 14°C, low 9°C.

Pressure1018 mb
Wind11 mph N
Humidity87%
Visibility6.2 mi
Dew point7°C
Thu, 08+9 ° /14 °0.3Light rain
+14 °Light rain

Merthyr, Thursday, 8 October

Light rain. High 14°C, low 9°C.

Pressure1025 mb
Wind12 mph NW
Humidity66%
Visibility6.2 mi
Dew point6°C
Fri, 09+10 ° /16 °6.7Rain
+16 °Rain

Merthyr, Friday, 9 October

Rain. High 16°C, low 10°C.

Pressure1012 mb
Wind18 mph W
Humidity95%
Visibility2.0 mi
Dew point14°C
Sat, 10+9 ° /12 °0Clear sky
+12 °Clear sky

Merthyr, Saturday, 10 October

Clear sky. High 12°C, low 9°C.

Pressure1014 mb
Wind18 mph W
Humidity66%
Visibility6.2 mi
Dew point6°C
Sun, 11+7 ° /12 °0.2Light rain
+12 °Light rain

Merthyr, Sunday, 11 October

Light rain. High 12°C, low 7°C.

Pressure1015 mb
Wind5 mph W
Humidity69%
Visibility6.2 mi
Dew point7°C
Mon, 12+11 ° /16 °10.9Rain
+16 °Rain

Merthyr, Monday, 12 October

Rain. High 16°C, low 11°C.

Pressure1010 mb
Wind15 mph SE
Humidity99%
Visibility—
Dew point15°C
Tue, 13+10 ° /16 °7.3Rain
+16 °Rain

Merthyr, Tuesday, 13 October

Rain. High 16°C, low 10°C.

Pressure1022 mb
Wind19 mph SW
Humidity68%
Visibility—
Dew point9°C
Wed, 14+10 ° /15 °0Clear sky
+15 °Clear sky

Merthyr, Wednesday, 14 October

Clear sky. High 15°C, low 10°C.

Pressure1030 mb
Wind13 mph SW
Humidity72%
Visibility—
Dew point10°C
Thu, 15+8 ° /15 °1.2Light rain
+15 °Light rain

Merthyr, Thursday, 15 October

Light rain. High 15°C, low 8°C.

Pressure1019 mb
Wind19 mph S
Humidity96%
Visibility—
Dew point14°C
Fri, 16+7 ° /12 °0Overcast
+12 °Overcast

Merthyr, Friday, 16 October

Overcast. High 12°C, low 7°C.

Pressure1026 mb
Wind11 mph SE
Humidity64%
Visibility—
Dew point4°C
Sat, 17+6 ° /14 °1.4Light rain
+14 °Light rain

Merthyr, Saturday, 17 October

Light rain. High 14°C, low 6°C.

Pressure1011 mb
Wind13 mph SW
Humidity80%
Visibility—
Dew point10°C
Sun, 18+5 ° /14 °1.2Light rain
+14 °Light rain

Merthyr, Sunday, 18 October

Light rain. High 14°C, low 5°C.

Pressure1012 mb
Wind31 mph S
Humidity69%
Visibility—
Dew point6°C
Mon, 19+9 ° /13 °14.8Rain
+13 °Rain

Merthyr, Monday, 19 October

Rain. High 13°C, low 9°C.

Pressure998 mb
Wind27 mph SW
Humidity73%
Visibility—
Dew point5°C
Tue, 20+8 ° /11 °9.4Light rain
+11 °Light rain

Merthyr, Tuesday, 20 October

Light rain. High 11°C, low 8°C.

Pressure997 mb
Wind22 mph SW
Humidity66%
Visibility—
Dew point5°C
Wed, 21+6 ° /11 °5.8Light rain
+11 °Light rain

Merthyr, Wednesday, 21 October

Light rain. High 11°C, low 6°C.

Pressure1007 mb
Wind12 mph W
Humidity72%
Visibility—
Dew point5°C
Thu, 22+7 ° /14 °13.2Rain
+14 °Rain

Merthyr, Thursday, 22 October

Rain. High 14°C, low 7°C.

Pressure1005 mb
Wind22 mph S
Humidity83%
Visibility—
Dew point9°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 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 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.